DTC    P1604    Startability Malfunction

for Preparation Click here

DESCRIPTION

1. *1: for CVT
   
2. *2: for Manual Transaxle
   

WIRING DIAGRAM

INSPECTION PROCEDURE

HINT:

1. In contrast to normal malfunction diagnosis for components, circuits and systems, DTC P1604 is used to determine the malfunctioning area from the problem symptoms and freeze frame data when the user mentions problems such as starting difficulty.
   As the DTC can be stored as a result of certain user actions, even if the DTC is output, if the customer makes no mention of problems, clear the DTC without performing any troubleshooting and return the vehicle to the customer.
   
2. If any other DTCs are output, perform troubleshooting for those DTCs first.
   
3. When the Data List item "Immobiliser Fuel Cut" is ON, the engine cannot be started.
   
4. Read freeze frame data using the intelligent tester. Freeze frame data records engine conditions when a malfunction occurs. This information can be useful when troubleshooting.
   
5. When confirming the freeze frame data, be sure to check all 5 sets of freeze frame data (Click here).
   
6. When confirming freeze frame data, if there are multiple items related to the cause of the malfunction, perform troubleshooting for all related items.
   
7. Try to start the engine under the conditions recorded in the freeze frame data which were present when the malfunction occurred. Confirm the data at this time and compare it with the freeze frame data.
   
8. If the malfunction does not reoccur, carefully check the vehicle conditions from when the malfunction occurred using freeze frame data.
   
9. When performing inspections, jiggle the relevant wire harness and connectors in an attempt to reproduce malfunctions that do not always occur.
   
10. If the same inspection or replacement procedure appears 2 times when performing an inspection procedure, it is not necessary to repeat the procedure the second time.
    

1. Freeze frame data exists, but the malfunction has not reoccurred and the malfunction conditions are unknown.
   
   

   1. The engine speed recorded in the freeze frame data is 0 rpm (the engine does not crank).
      
      

      HINT:

      One of the following problems may be present: battery depletion, excess engine friction, a starter malfunction or a crankshaft position sensor malfunction.

      1. If the battery voltage is less than 6 V during cranking, there is a high probability that engine friction is abnormal.
         
      2. If the battery voltage drops to 5 V or less when starting the engine, the battery may be malfunctioning.
         
      3. If the battery voltage fluctuates while cranking the engine, it can be concluded that cranking is being performed. When the engine speed is 0 rpm, the crankshaft position sensor and/or an ECM may be malfunctioning.
         

      
      

      
      

   2. All engine speeds recorded in the freeze frame data are between 60 and 250 rpm (the engine cranks but there is no combustion).
      

      HINT:

      If the engine speed is between 60 and 250 rpm (no initial combustion), there may be a wiring problem or a complete failure of an ignition or fuel system part.

      
      
      1. Due to a engine coolant temperature sensor malfunction, the fuel injection volume is extremely high or low and the engine may not be able to be started.
         
         
         
         
         
         

   3. The engine speed recorded in the freeze frame data is 250 rpm or higher (the initial combustion and starter turnoff occur late).
      

      HINT:

      If the engine speed is 250 rpm or higher (combustion occurs but the initial combustion and starter turnoff timing is too late), the fuel injection volume is often incorrect (too low or too high) and determining the cause of the malfunction is often difficult.

      1. Due to an engine coolant temperature sensor malfunction, the fuel injection volume is extremely high or low and engine starting trouble may occur.
         
      2. If Long FT is incorrect, there may be a fuel supply problem due to the injectors or fuel pump being clogged, etc.
         
      
      
      3. If the engine cranking speed is high, compression loss may have occurred due to carbon interfering with the valve operation.
         
         
         
         
         
         

2. When the malfunction (starting difficulty) can be reproduced, or malfunction conditions are known, perform the following inspections ("Problem symptoms" and "Systems to inspect").
   
   

   1. Problem symptoms
      

      1. The engine does not crank.
         

         HINT:

         The starter is normal if a noise that indicates the starter pinion gear is extending is heard. The battery may be fully depleted or there may be excess engine friction.

      2. The engine cranking speed is abnormal.
         

         HINT:

         If the engine cranking speed is high, compression loss may have occurred because carbon interfered with valve operation, etc.

      3. There is no initial combustion.
         

         HINT:

         If there is no initial combustion, there is probably a wiring problem or an ignition or fuel system part malfunction.

      4. The engine stalls after starter turnoff.
         

         HINT:

         If the engine stalls after starter turnoff, the air-fuel ratio may be incorrect or the VVT may have a problem returning.

      5. The initial combustion and starter turnoff occur late.
         

         HINT:

         1. If the initial combustion and starter turnoff occur late, the fuel injection volume is probably incorrect (too low or too high).
            
         2. Causes of fuel system malfunctions according to conditions present at the time of the malfunction.
            
         1. When 2 to 3 minutes have elapsed after stopping the engine: Fuel pressure loss due to the pressure regulator failing to maintain the fuel pressure.
            
         2. When 15 to 120 minutes have elapsed after stopping the engine: Problem with injector fuel seal.
            
         3. When a long time has elapsed after stopping the engine: pressure regulator is stuck open.
            

   2. Systems to inspect.
      

      1. Intake system
         
      2. Ignition system
         
      3. Fuel system
         

1. Freeze frame data exists, but the malfunction has not reoccurred and the malfunction conditions are unknown.
   
   

   Freeze Frame Data Item	Result	Suspected Area	Procedure
   Engine Speed	0 rpm (no engine cranking at all)	Battery fully depleted Engine assembly (excess friction) Starter Immobiliser system Crankshaft position sensor ECM	4 to 9
   	60 to 250 rpm (engine cranks but no initial combustion*1)	Fuel pump control system Ignition system Engine coolant temperature sensor Fuel injection system	10 to 14
   	250 rpm or higher (combustion occurs but initial combustion and starter turnoff*2 occur late)	Engine assembly (compression loss) Fuel injection system Fuel pump control system	15 to 23

   HINT:

   1. *1: First combustion after cranking begins.
      
   2. *2: Condition when engine speed increases and starter can be turned off.
      

2. When vehicle conditions can be reproduced, or when malfunction conditions are known.
   
   

   1. Problem symptoms
      
      

      Problem Symptom	Suspected Area	Suspected Component	Procedure
      The engine does not crank	Battery malfunction	Battery fully depleted	26 to 31
      	Starting system	Starter (includes pinion gear wear or tooth damage) Starter
      	Immobiliser system	Immobiliser system
      	Engine assembly	Engine assembly (excess friction) Drive plate wear or tooth damage*1 Flywheel wear or tooth damage*2
      Cranking speed too low	Battery malfunction	Battery fully depleted	32 to 34
      	Starting system	Starter
      	Engine assembly	Engine assembly (excess friction)
      Cranking speed too high	Engine assembly	Engine assembly (compression loss)
      There is no initial combustion	Fuel supply problem	Maintenance of fuel pressure by pressure regulator Fuel injector leak Fuel leak from fuel line Fuel pump control system Fuel pump	35 to 50
      	Ignition system malfunction	Spark plug Crankshaft position sensor Ignition coil
      Engine stalls after starter turnoff	Air suction	Intake system connections	51 to 58
      	Deposits in throttle body	Throttle body
      	VVT valve does not return properly	Camshaft timing oil control valve assembly
      	Manifold absolute pressure sensor malfunction	Manifold absolute pressure sensor
      	EGR valve does not close properly	EGR valve
      The initial combustion and starter turnoff occur late	Engine coolant temperature sensor malfunction	Engine coolant temperature sensor	59 to 72
      	Manifold absolute pressure sensor malfunction	Manifold absolute pressure sensor
      	Abnormal A/F learning value	Air fuel ratio sensor
      	Deviation from fuel injection characteristics	Fuel injector
      	Wet-fouled or dry-fouled spark plug	Spark plug
      	Lack of fuel pressure	Pressure regulator Fuel pump Fuel pump control system

      1. *1: for CVT
         
      2. *2: for Manual Transaxle
         

   2. Systems to inspect
      
      

      Problem Symptom	Suspected Area	Suspected Components	Procedure
      Fuel system troubleshooting A	Abnormal A/F learning value	Fuel injector	88 to 95 96 to 103
      	Rough idling	Crankshaft position sensor
      	Abnormal fuel pressure	Fuel Fuel leak from fuel line Fuel pump Pressure regulator
      Fuel system troubleshooting B	Abnormal concentration of HC in surge tank	Purge VSV system Fuel injector	104 to 106
      Fuel system troubleshooting C	Injection signal system malfunction	Fuel injector Crankshaft position sensor Camshaft position sensor ECM	74 to 78
      Intake system troubleshooting	Difference between ISC target value and opening angle when idling	Engine assembly (compression loss) Valve timing Engine coolant temperature sensor ECM	85 to 87 107 to 109
      Ignition system troubleshooting	Camshaft and/or crankshaft position sensor signal malfunction	Crankshaft position sensor system (including sensor installation) Camshaft position sensor system (including sensor installation) ECM	79 to 84 110 to 115

1. Connect the intelligent tester to the DLC3.
   

2. Turn the ignition switch to ON.
   

3. Enter the following menus: Powertrain / Engine and ECT / DTC.
   

4. Read the DTCs and record the Freeze Frame Data.
   

   HINT:

   1. This freeze frame data shows the actual engine conditions when engine starting trouble occurred.
      
   2. When confirming the freeze frame data, be sure to check all 5 data sets of freeze frame data.
      
   3. The fourth set of freeze frame data is the data recorded when then the DTC is stored.
      

      Result 

      Result	Proceed to
      Only DTC P1604 is output	A
      DTC P1604 and other DTCs are output	B

B	GO TO DTC CHART (Click here)

A

1. Connect the Intelligent tester to the DLC3.
   

2. Turn the ignition switch to ON.
   

3. Turn the tester on.
   

4. Enter the following menus: Powertrain / Engine and ECT / Data List / Immobiliser Fuel Cut.
   

5. Read the value displayed on the intelligent tester.
   

   OK:

   Immobiliser Fuel Cut is OFF
   

   HINT:

   If the engine is cranked immediately after reconnecting the battery cable (key verification for immobiliser system not completed), the engine cannot be started. Key verification needs to wait for several seconds after turning the ignition switch to ON.

   Result 

   Result	Proceed to
   OK	A
   NG (w/ entry and start system)	B
   NG (w/o entry and start system)	C

B	REPAIR ENGINE IMMOBILISER SYSTEM (Click here)
C	REPAIR ENGINE IMMOBILISER SYSTEM (Click here)

A

1. Confirm the problem symptoms.
   

   Result 

   Result	Proceed to
   Freeze frame data exists, but the problem symptoms cannot be reproduced and the malfunction conditions are unknown	A
   The problem symptoms can be reproduced, or the malfunction conditions are known	B

B	Go to step 25

A

1. Connect the intelligent tester to the DLC3.
   

2. Turn the ignition switch to ON.
   

3. Using the intelligent tester, confirm the vehicle conditions recorded in the freeze frame data which were present when the DTC was stored (Click here).
   
   

   Result 

   Freeze Frame Data Item		Suspected Area	Proceed to
   Engine Speed	Battery Voltage
   All 0 rpm (no engine cranking at all)	Minimum voltage is less than 5 V	Battery fully depleted	A
   	Minimum voltage is 5 V or higher	Starter malfunction Crankshaft position sensor system Excess engine friction Immobiliser system ECM	B
   60 to 250 rpm (engine cranks but no initial combustion)	-	Fuel pump control system Ignition system Engine coolant temperature sensor Immobiliser system Fuel injection system	C
   250 rpm or higher (combustion occurs but initial combustion and starter turnoff occur late)	-	Engine assembly Fuel injection system Fuel pump control system	D

   HINT:

   When DTC P1604 is stored, either "Engine Start Hesitation"*1 or "Low Rev for Eng Start"*2 in the Freeze Frame Data will be ON. If "Low Rev for Eng Start" is ON, Proceed to E.

   1. *1: This value turns ON when the engine speed does not reach a certain value for a certain period of time when starting the engine.
      
   2. *2: This value turns ON when the engine stalls immediately after starting the engine. If "Low Rev for Eng Start" is ON, as there is a possibility that the low engine speed or engine stall was caused by the user, confirm the following freeze frame data items.
      
   1. Immobilizer Fuel Cut
      
   2. Engine Speed (Starter OFF)
      
   3. Shift SW Status (R, D Range)
      

B	Go to step 5
C	Go to step 10
D	Go to step 15
E	Go to step 51

A
CHARGE OR REPLACE BATTERY

1. Connect the intelligent tester to the DLC3.
   

2. Turn the ignition switch to ON.
   

3. Using the intelligent tester, confirm the vehicle conditions recorded in the freeze frame data which were present when the DTC was stored (Click here).
   
   

   Result 

   Freeze Frame Data Item	Result	Suspected Area	Proceed to
   Battery Voltage	Minimum voltage is 6 V or higher and voltage does not fluctuate*1	Starter system	A*5 B*6
   	Minimum voltage is 6 V or higher and voltage fluctuates*2, *3	Crankshaft position sensor system ECM	C
   	Minimum voltage is 5 to 6 V*4	Excess engine friction Battery fully depleted	D

   HINT:

   
   
   1. *1: The 5 sets of freeze frame data show approximately the same battery voltage.
      
   2. *2: The 5 sets of freeze frame data show different battery voltages.
      
   3. *3: If the voltage fluctuates, it can be determined that cranking is being performed normally. When the engine speed is 0 rpm, the crankshaft position sensor system and/or the ECM may be malfunctioning.
      
   4. *4: There may be excess engine friction. Make sure that the crankshaft rotates smoothly when turning it by hand. Excess engine friction may have occurred temporarily. Remove the cylinder head cover and oil pan, and check for foreign matter such as iron fragments. If there is a malfunction or signs of a malfunction present, perform a detailed inspection by disassembling all the parts.
      
   5. *5: w/o Entry and start system
      
   6. *6: w/ Entry and start system
      

B	CHECK CRANKING HOLDING FUNCTION CIRCUIT (Click here)
C	Go to step 6
D	CHECK AND REPAIR ENGINE ASSEMBLY OR BATTERY

A
CHECK STARTER SIGNAL CIRCUIT (Click here)

1. Check the tightening and installation condition of the crankshaft position sensor bolt.
   

2. Check the connection of the crankshaft position sensor connector.
   

NG	SECURELY REINSTALL CRANKSHAFT POSITION SENSOR (Click here)

OK

1. Disconnect the crankshaft position sensor connector.
   

2. Check for oil on the connector terminals.
   

   OK:

   No oil on the terminals.
   

3. Reconnect the crankshaft position sensor connector.
   

NG	REPLACE CRANKSHAFT POSITION SENSOR (Click here)

OK

1. Check the harnesses and connectors, referring to DTC P0335 inspection procedure (Click here).
   

HINT:

1. Jiggle the wire harness and connector to increase the likelihood of detecting malfunctions that do not always occur.
   
2. Make sure there is not an excessive amount of force applied to the wire harness.
   

NG	REPAIR OR REPLACE HARNESS OR CONNECTOR

OK

1. Replace the crankshaft position sensor (Click here).
   

2. Check the engine start operation.
   

   OK:

   Malfunction has been repaired successfully.
   

NG	REPLACE ECM (Click here)

OK
END (CRANKSHAFT POSITION SENSOR IS DEFECTIVE)

1. Connect the intelligent tester to the DLC3.
   

2. Turn the ignition switch to ON.
   

3. Using the intelligent tester, confirm the vehicle conditions recorded in the freeze frame data which were present when the DTC was stored (Click here).
   
   

   Result 

   Freeze Frame Data Item			Suspected Area	Proceed to
   Coolant Temp, Ambient Temperature, Intake Air	Coolant Temp, Ambient Temperature	Fuel Pump/Speed Status
   Difference between Coolant Temp, Ambient Temperature and Intake Air is 10°C (18°F) or more*1	Coolant Temp is 125°C (257°F) or more, or lower than Ambient Temperature by 15°C (27°F) or more	-	Engine coolant temperature sensor	A
   	Other than above	All 5 sets of freeze frame data are ON	-	B
   		At least 1 of the 5 sets of freeze frame data is OFF	Fuel pump control system	C
   Difference between Coolant Temp, Ambient Temperature and Intake Air is less than 10°C (18°F)*2	-	At least 1 of the 5 sets of freeze frame data is OFF	Fuel pump control system	C
   		All 5 sets of freeze frame data are ON	-	B

   HINT:

   1. *1: A long time had not elapsed after stopping the engine.
      
   2. *2: A long time had elapsed after stopping the engine.
      

B	Go to step 11
C	CHECK FUEL PUMP CONTROL CIRCUIT (Click here)

A
REPLACE ENGINE COOLANT TEMPERATURE SENSOR (Click here)

1. Connect the intelligent tester to the DLC3.
   

2. Disconnect the connector from the fuel suction tube.
   

3. Turn the ignition switch to ON.
   

4. Turn the tester on.
   

5. Enter the following menus: Powertrain / Engine and ECT / Active Test / Control the Fuel Pump/Speed.
   

6. Measure the voltage according to the value(s) in the table below.
   

   Standard Voltage:

   Tester Connection	Condition	Specified Condition
   L1-4 - Body ground	Active Test is being performed	11 to 14 V

   Text in Illustration 

   *1	Front view of wire harness connector (to Fuel Pump)

   HINT:

   1. Jiggle the wire harness and connector to increase the likelihood of detecting malfunctions that do not always occur.
      
   2. Make sure there is not an excessive amount of force applied to the wire harness.
      

NG	CHECK FUEL PUMP CONTROL CIRCUIT (Click here)

OK

1. Check the harnesses and connectors, referring to DTC P0300 inspection procedure (Click here).
   

HINT:

1. Jiggle the wire harness and connector to increase the likelihood of detecting malfunctions that do not always occur.
   
2. Make sure there is not an excessive amount of force applied to the wire harness.
   

NG	CHECK FUEL INJECTOR CIRCUIT (Click here)

OK

1. Connect the intelligent tester to the DLC3.
   

2. Turn the ignition switch to ON.
   

3. Turn the tester on.
   

4. Enter the following menus: Powertrain / Engine and ECT / Active Test / Control the Fuel Pump/Speed.
   

5. When performing the Active Test, check for fuel leakage from the fuel pipes.
   

   Result 

   Result	Proceed to
   Fuel leakage or signs of fuel leakage are present	A
   No fuel leakage or signs of fuel leakage	B

   HINT:

   1. Jiggle the fuel hose and connector to increase the likelihood of detecting malfunctions that do not always occur.
      
   2. When performing the Active Test, if there is no operating noise from the fuel pump, the fuel pump system may be malfunctioning.
      
   3. Check if the vehicle ran out of fuel, as engine starting trouble due to running out of fuel is also detected.
      

B	Go to step 14

A
REPAIR OR REPLACE FUEL LINE

1. Check for foreign matter such as iron particles around the fuel pump (fuel pump, fuel pump filter, and inside the fuel tank), and for signs that the fuel pump was stuck.
   

   Result 

   Result	Proceed to
   There is foreign matter or signs that fuel pump was stuck	A
   There is no foreign matter and no signs that fuel pump was stuck	B

B	Go to step 24

A
REPAIR OR REPLACE FUEL SYSTEM

1. Connect the intelligent tester to the DLC3.
   

2. Turn the ignition switch to ON.
   

3. Using the intelligent tester, confirm the vehicle conditions recorded in the freeze frame data which were present when the DTC was stored (Click here).
   
   

   Result 

   Freeze Frame Data Item				Suspected Area	Proceed to
   Coolant Temp, Ambient Temperature, Intake Air	Coolant Temp, Ambient Temperature	Long FT	Engine Speed
   Difference between Coolant Temp, Ambient Temperature and Intake Air is 10°C (18°F) or more*1	Coolant Temp is 125°C (257°F) or more, or lower than Ambient Temperature by 15°C (27°F) or more	-	-	Engine coolant temperature sensor	A
   	Other than above	-15% or less, or +15% or more	-	Fuel pump control system Fuel injector	B
   		-15 to +15%	Minimum speed is 300 rpm or more*3	Engine assembly	C
   			Minimum speed is below 300 rpm	Fuel system Intake air system	D
   Difference between Coolant Temp, Ambient Temperature and Intake Air is less than 10°C (18°F)*2	-	-15% or less, or +15% or more	-	Fuel pump control system Fuel injector	B
   		-15 to +15%	Minimum speed is 300 rpm or more*3	Engine assembly	C
   			Minimum speed is below 300 rpm	Fuel system Intake air system	D

   HINT:

   1. *1: A long time had not elapsed after stopping the engine.
      
   2. *2: A long time had elapsed after stopping the engine.
      
   3. *3: Compression loss may have occurred in the engine assembly.
      

B	Go to step 16
C	CHECK AND REPAIR ENGINE ASSEMBLY
D	Go to step 18

A
REPLACE ENGINE COOLANT TEMPERATURE SENSOR (Click here)

1. Check that no carbon is stuck to the fuel injector.
   

   OK:

   No carbon present
   

NG	REPLACE FUEL INJECTOR ASSEMBLY (Click here)

OK

1. Check for foreign matter such as iron particles around the fuel pump (fuel pump, fuel pump filter, and inside the fuel tank), and for signs that the fuel pump was stuck.
   

   Result 

   Result	Proceed to
   There is foreign matter or signs that fuel pump was stuck	A
   There is no foreign matter and no signs that fuel pump was stuck	B

B	Go to step 24

A
REPAIR OR REPLACE FUEL SYSTEM

1. Connect the intelligent tester to the DLC3.
   

2. Turn the ignition switch to ON.
   

3. Using the intelligent tester, confirm the vehicle conditions recorded in the freeze frame data which were present when the DTC was stored (Click here).
   
   

   Result 

   Freeze Frame Data Item	Result	Suspected Area	Proceed to
   Coolant Temp	Engine coolant temperature is 40°C (104°F) or less*1	Pressure regulator	A
   	Engine coolant temperature is 40 to 90°C (104 to 194°F)*2	Fuel injector	B
   	Engine coolant temperature is 90°C (194°F) or more*3	Pressure regulator	A

   HINT:

   *1: If the engine coolant temperature is 40°C (104°F) or less (after stopping engine and vehicle not driven for a long period of time), the pressure regulator may be stuck open. Attach a fuel pressure gauge and check the ability to maintain fuel pressure after stopping the engine.

   *2: If the engine coolant temperature is 40 to 90°C (104 to 194°F) (15 to 120 minutes have passed after stopping the engine), there may be fuel leaking from the fuel injector.

   *3: If the engine coolant temperature is 90°C (194°F) or more (2 to 5 minutes have passed after stopping the engine), there may be a problem with the pressure regulator failing to maintain the fuel pressure. Attach a fuel pressure gauge and check the ability to maintain fuel pressure after stopping the engine.

B	Go to step 20

A

HINT:

For the fuel pressure inspection, refer to the following procedures (Click here).

1. Attach a fuel pressure gauge and check the fuel pressure after stopping the engine.
   

   Standard:

   147 kPa (1.5 kgf/cm²) or higher (5 minutes after stopping the engine)
   

   HINT:

   If the engine cannot be started, read the values after cranking the engine.

   Result 

   Result	Proceed to
   Abnormal	A
   Normal	B

B	Go to step 24

A
REPLACE FUEL PRESSURE REGULATOR ASSEMBLY (Click here)

1. Clean the inside of the surge tank with compressed air.
   

2. After stopping the engine, measure the HC concentration inside the surge tank for 15 minutes.
   

   Result 

   Result	Proceed to
   400 ppm or higher	A
   Less than 400 ppm	B

   HINT:

   If the concentration is 400 ppm or higher, the fuel injector may have a sealing problem.

B	Go to step 22

A

1. Inspect the fuel injector (Click here).
   

   Result 

   Result	Proceed to
   Abnormal	A
   Normal	B

B	Go to step 22

A
REPLACE FUEL INJECTOR ASSEMBLY (Click here)

1. Check if carbon is in the air flow passage.
   

   Result 

   Result	Proceed to
   Carbon in passage	A
   No carbon present	B

B	Go to step 23

A
REPLACE THROTTLE BODY ASSEMBLY (Click here)

1. Check the intake system for vacuum leak (Click here).
   

   OK:

   No leak in intake system.
   

NG	REPAIR OR REPLACE INTAKE SYSTEM

OK

1. Check if the engine can be started.
   

   Result 

   Result	Proceed to
   Engine can be started	A
   Engine cannot be started	B

B	Go to step 25

A
END

1. Confirm the problem symptoms.
   

   HINT:

   The problem symptoms below can be determined by reading the freeze frame data.

   
   

   Result 

   Problem Symptom	Suspected Area	Proceed to
   The engine does not crank	Battery fully depleted Starter (includes pinion gear wear or teeth damage) Starter system Engine assembly (excess friction) Drive plate wear or teeth damage	A
   Abnormal cranking speed	Battery fully depleted Starter Engine assembly (excess friction, compression loss)	B
   There is no initial combustion (combustion does not occur even once)*1	Fuel pressure of pressure regulator maintained Fuel injector leak Fuel leak from fuel line Fuel pump control system Fuel pump Spark plug Crankshaft position sensor system Ignition coil system EGR valve	C
   The engine stalls after starter turnoff (engine stalls immediately after the first time the engine speed increases)*2	Intake system connections Throttle body Camshaft timing oil control valve Manifold absolute pressure sensor EGR valve	D
   The initial combustion and starter turnoff occur late*3	Engine coolant temperature sensor Manifold absolute pressure sensor Air fuel ratio sensor Heated oxygen sensor Fuel injector Spark plug Pressure regulator Fuel pump Fuel pump control system	E

   HINT:

   1. If there is hesitation (cranking speed is slow and combustion occurs before passing TDC) during the initial cranking period, the battery charge may be insufficient or the starter may be malfunctioning.
      
   2. *1: If there is no initial combustion, a wire harness may be malfunctioning, or the ignition or fuel system may be malfunctioning.
      
   3. *2: If the engine stalls after starter turnoff, the air-fuel ratio may be incorrect or the Camshaft timing oil control valve may have a problem returning.
      
   4. *3: If the initial combustion and starter turnoff occur late, the fuel injection volume may be incorrect (too low or too high).
      

B	Go to step 32
C	Go to step 35
D	Go to step 51
E	Go to step 59

A

1. When cranking the engine, check for a noise indicating that the starter pinion gear is extending, and check that the starter pinion gear is not spinning freely.
   
   

   Result 

   Problem Symptom	Suspected Area	Proceed to
   A noise indicating that the starter pinion gear is extending is heard and the starter pinion gear is not spinning freely*1	Battery Excess engine friction Starter	A
   A noise indicating that the starter pinion gear is extending is heard and the starter pinion gear is spinning freely	Drive plate*2 Flywheel*3 Starter	B
   A noise indicating that the starter pinion gear is extending is not heard	Battery Starter Starter system	C

   HINT:

   1. *1: The battery may be fully depleted or there may be excess engine friction.
      
   2. *2: for CVT
      
   3. *3: for Manual Transaxle
      

B	Go to step 29
C	Go to step 30

A

1. Inspect the battery (Click here).
   

NG	CHARGE OR REPLACE BATTERY

OK

1. Check that the crankshaft rotates smoothly when rotating it by hand.
   

   OK:

   Crankshaft rotates smoothly.
   

   Result 

   Result	Proceed to
   NG	A
   OK (Models w/ 0.8 kW type starter)	B
   OK (Models w/ 1.0 kW type starter)	C

   HINT:

   Excess engine friction may have occurred temporarily. Remove the cylinder head cover and oil pan, and check for foreign matter such as iron fragments. If there is a malfunction or signs of a malfunction present, perform a detailed inspection by disassembling all the parts.

B	INSPECT STARTER ASSEMBLY (FOR 0.8 KW TYPE) (Click here)
C	INSPECT STARTER ASSEMBLY (FOR 1.0 KW TYPE) (Click here)

A
CHECK AND REPAIR ENGINE ASSEMBLY

1. Remove the starter.
   

   Starter	See page
   0.8 kW Type	Click here
   1.0 kW Type	Click here

2. Check for starter pinion gear wear and damage.
   

   Standard:

   There is no wear or damage.
   

   Result 

   Result	Proceed to
   NG	A
   OK (for Manual Transaxle)	B
   OK (for CVT)	C

3. Install the starter.
   

   Starter	See page
   0.8 kW Type	Click here
   1.0 kW Type	Click here

B	REPLACE FLYWHEEL SUB-ASSEMBLY (Click here)
C	REPLACE DRIVE PLATE AND RING GEAR SUB-ASSEMBLY (Click here)

A
REPLACE STARTER ASSEMBLY

1. Inspect the battery (Click here).
   

NG	CHARGE OR REPLACE BATTERY

OK

1. Inspect the starter.
   

B	CHECK STARTER SIGNAL CIRCUIT (Click here)
C	CHECK CRANKING HOLDING FUNCTION CIRCUIT (Click here)

A
REPLACE STARTER ASSEMBLY

1. Check the cranking speed.
   
   

   Result 

   Problem Symptom	Suspected Area	Proceed to
   Cranking speed is slow (100 rpm or less)	Battery Starter Excess engine friction	A
   Cranking speed is fast (300 rpm or more)*1	Engine compression loss	B

   HINT:

   *1: If the cranking speed is fast, there may be compression loss.

B	CHECK AND REPAIR ENGINE ASSEMBLY

A

1. Inspect the battery (Click here).
   

NG	CHARGE OR REPLACE BATTERY

OK

1. Check that the crankshaft rotates smoothly when rotating it by hand.
   

   OK:

   Crankshaft rotates smoothly.
   

   Result 

   Result	Proceed to
   NG	A
   OK (Models w/ 0.8 kW type starter)	B
   OK (Models w/ 1.0 kW type starter)	C

   HINT:

   Excess engine friction may have occurred temporarily. Remove the cylinder head cover and oil pan, and check for foreign matter such as iron fragments. If there is a malfunction or signs of a malfunction present, perform a detailed inspection by disassembling all the parts.

B	INSPECT STARTER ASSEMBLY (FOR 0.8 KW TYPE) (Click here)
C	INSPECT STARTER ASSEMBLY (FOR 1.0 KW TYPE) (Click here)

A
CHECK AND REPAIR ENGINE ASSEMBLY

1. Using a sound scope or screwdriver, check for an injector operating noise while cranking the engine.
   

   OK:

   Fuel injector operating noise is heard.
   

NG	Go to step 48

OK

1. Inspect the fuel pressure (Click here).
   

NG	Go to step 46

OK

1. Check for sparks (Click here).
   

NG	Go to step 41

OK

1. Confirm the conditions present when the malfunction occurred based on the customer problem analysis.
   
   

   Result 

   Problem Symptom	Suspected Area	Proceed to
   When the engine is stopped and a long time has passed, engine starting trouble occurs*1	Pressure regulator is stuck open	A
   When the engine is stopped and approximately 15 to 120 minutes have passed, engine starting trouble occurs*2	Fuel injector leak	B
   When the engine is stopped and approximately 2 to 3 minutes have passed, engine starting trouble occurs*3	Failure to maintain fuel pressure by Pressure regulator	A
   Condition other than above, or there is an inconsistency in the conditions present when engine starting trouble occurs	-	C*4

   HINT:

   *1: The pressure regulator may be stuck open. Attach a fuel pressure gauge and check the ability to maintain fuel pressure after stopping the engine.

   *2: Fuel may be leaking from the fuel injector.

   *3: The pressure regulator may not be able to maintain the fuel pressure. Attach a fuel pressure gauge and check the ability to maintain fuel pressure after stopping the engine.

   *4: From step 73, perform fuel system troubleshooting C (steps 74 to 78).

B	Go to step 40
C	Go to step 73

A

HINT:

For the fuel pressure inspection, refer to the following procedures (Click here).

1. Attach a fuel pressure gauge and check the fuel pressure after stopping the engine.
   

   Result 

   Result	Proceed to
   Less than 147 kPa (1.5 kgf/cm2) (5 minutes after stopping the engine)	A
   147 kPa (1.5 kgf/cm2) or higher (5 minutes after stopping the engine)	B*1

   HINT:

   1. If the engine cannot be started, check the fuel pressure after cranking the engine.
      
   2. *1: From step 73, perform fuel system troubleshooting C (steps 74 to 78).
      

B	Go to step 73

A
REPLACE FUEL PRESSURE REGULATOR ASSEMBLY (Click here)

1. After stopping the engine, measure the HC concentration inside the surge tank for 15 minutes.
   

   Result 

   Result	Proceed to
   400 ppm or higher	A
   Less than 400 ppm	B*1

   HINT:

   1. If the concentration is 400 ppm or higher, the fuel injector may have a sealing problem.
      
   2. *1: From step 73, perform fuel system troubleshooting C (steps 74 to 78).
      

B	Go to step 73

A
REPLACE FUEL INJECTOR ASSEMBLY (Click here)

1. Inspect the spark plugs (Click here).
   

   HINT:

   Even if the spark plug of only one cylinder is malfunctioning, replace the spark plugs of all cylinders.

NG	REPLACE SPARK PLUG (Click here)

OK

1. Connect the intelligent tester to the DLC3.
   

2. Turn the ignition switch to ON.
   

3. Turn the tester on.
   

4. Enter the following menus: Powertrain / Engine and ECT / Data List / Engine Speed.
   

5. Start the engine.
   

6. While running the engine, read the Engine Speed value.
   

   OK:

   A value that matches the actual engine speed is constantly output.
   

   HINT:

   1. Check the engine speed using a line graph.
      
   2. If the engine cannot be started, check the engine speed while cranking the engine.
      
   3. If the engine speed is 0 rpm, the crankshaft position sensor may have an open or short circuit.
      

NG	CHECK CRANKSHAFT POSITION SENSOR CIRCUIT (Click here)

OK

1. Check the harnesses and connectors, referring to DTC P0351 inspection procedure (Click here).
   

HINT:

1. Jiggle the wire harness and connector to increase the likelihood of detecting malfunctions that do not always occur.
   
2. Make sure there is not an excessive amount of force applied to the wire harness.
   

NG	CHECK POWER SOURCE CIRCUIT (IGNITION COIL POWER SOURCE) (Click here)

OK

1. Check the harnesses and connectors, referring to DTC P0351 inspection procedure (Click here).
   

HINT:

1. Jiggle the wire harness and connector to increase the likelihood of detecting malfunctions that do not always occur.
   
2. Make sure there is not an excessive amount of force applied to the wire harness.
   

NG	REPAIR OR REPLACE HARNESS OR CONNECTOR

OK

1. Check the harnesses and connectors, referring to DTC P0351 inspection procedure (Click here).
   

HINT:

1. Jiggle the wire harness and connector to increase the likelihood of detecting malfunctions that do not always occur.
   
2. Make sure there is not an excessive amount of force applied to the wire harness.
   
3. If the wire harness is normal, after replacing the ignition coil, check if engine starting trouble occurs again. If engine starting trouble occurs again, proceed to step 73 and perform troubleshooting for the ignition system (steps 79 to 84).
   

NG	REPAIR OR REPLACE HARNESS OR CONNECTOR

OK
REPLACE IGNITION COIL (Click here)

1. Connect the intelligent tester to the DLC3.
   

2. Turn the ignition switch to ON.
   

3. Turn the tester on.
   

4. Enter the following menus: Powertrain / Engine and ECT / Active Test / Control the Fuel Pump/Speed.
   

5. When performing the Active Test, check for an operating sound from the fuel pump.
   

   OK:

   Control the Fuel Pump/Speed	Specified Condition
   ON	Operating sound heard
   OFF	Operating sound not heard

   HINT:

   Jiggle the wire harness and connector to increase the likelihood of detecting malfunctions that do not always occur.

NG	CHECK FUEL PUMP CONTROL CIRCUIT (Click here)

OK

1. Connect the intelligent tester to the DLC3.
   

2. Turn the ignition switch to ON.
   

3. Turn the tester on.
   

4. Enter the following menus: Powertrain / Engine and ECT / Active Test / Control the Fuel Pump/Speed.
   

5. When performing the Active Test, check for fuel leakage from the fuel pipes.
   

   Result 

   Result	Proceed to
   Fuel leakage or signs of fuel leakage are present	A
   No fuel leakage or signs of fuel leakage	B

   HINT:

   1. Jiggle the fuel hose and connector to increase the likelihood of detecting malfunctions that do not always occur.
      
   2. When performing the Active Test, if there is no operating noise from the fuel pump, the fuel pump system may be malfunctioning.
      
   3. Check if the vehicle ran out of fuel, as engine starting trouble due to running out of fuel is also detected.
      
   4. If there are no fuel leaks, after inspecting the fuel pump control system, check if engine starting trouble occurs again. If engine starting trouble occurs again, proceed to step 73 and perform fuel system troubleshooting (steps 74 to 78).
      

B	CHECK FUEL PUMP CONTROL CIRCUIT (Click here)

A
REPAIR OR REPLACE FUEL LINE

1. Connect the intelligent tester to the DLC3.
   

2. Turn the ignition switch to ON.
   

3. Turn the tester on.
   

4. Enter the following menus: Powertrain / Engine and ECT / Data List / Engine Speed.
   

5. Start the engine.
   

6. While running the engine, read the Engine Speed value.
   

   OK:

   A value that matches the actual engine speed is constantly output.
   

   HINT:

   1. Check the engine speed using a line graph.
      
   2. If the engine cannot be started, check the engine speed while cranking the engine.
      
   3. If the engine speed is 0 rpm, the crankshaft position sensor may have an open or short circuit.
      

NG	REPLACE CRANKSHAFT POSITION SENSOR (Click here)

OK

1. Check the harnesses and connectors, referring to Fuel Injector Circuit inspection procedure (Click here).
   

HINT:

1. Jiggle the wire harness and connector to increase the likelihood of detecting malfunctions that do not always occur.
   
2. Make sure there is not an excessive amount of force applied to the wire harness.
   

NG	CHECK FUEL INJECTOR CIRCUIT (Click here)

OK

1. Check the harnesses and connectors, referring to Fuel Injector Circuit inspection procedure (Click here).
   

HINT:

1. Jiggle the wire harness and connector to increase the likelihood of detecting malfunctions that do not always occur.
   
2. Make sure there is not an excessive amount of force applied to the wire harness.
   

NG	REPAIR OR REPLACE HARNESS OR CONNECTOR

OK
REPLACE ECM (Click here)

1. Connect the intelligent tester to the DLC3.
   

2. Turn the ignition switch to ON.
   

3. Turn the tester on.
   

4. Enter the following menus: Powertrain / Engine and ECT / Data List / MAP.
   

5. Read the MAP value.
   

   Standard:

   Same as actual atmospheric pressure.
   

   HINT:

   Reference MAP value:

   Engine Condition	Specified Condition
   Idling with warm engine	28 to 48 kPa
   IG ON, engine stopped	80 to 110 kPa*

   *: varies with weather condition.

NG	Go to step 58

OK

1. Check for air suction in the intake system (vacuum hose disconnection, cracks, gaskets, etc.) (Click here).
   

   HINT:

   If the accelerator pedal is released after racing the engine, the inspection is easier to perform because the vacuum inside the intake pipes increases and the air suction noise becomes louder.

   OK:

   There is no air suction.
   

NG	REPAIR OR REPLACE INTAKE SYSTEM

OK

1. Disconnect the throttle body connector.
   

   HINT:

   When the connector is disconnected, the vehicle enters fail-safe mode and the throttle valve opening angle is 4 to 7°.

2. Crank the engine and check that it starts.
   

   Result 

   Result	Proceed to
   Engine starts	A
   Engine does not start	B

3. Connect the throttle body connector.
   

   HINT:

   When this inspection is performed, the MIL may illuminate. After finishing the inspection, check and clear DTCs (Click here).

B	Go to step 55

A

1. Check if carbon is in the air flow passage.
   

   OK:

   No carbon present.
   

NG	REMOVE FOREIGN OBJECT AND CLEAN THROTTLE BODY

OK

1. Connect the intelligent tester to the DLC3.
   

2. Turn the tester on.
   

3. Warm up the engine.
   

4. Enter the following menus: Powertrain / Engine and ECT / Active Test / Control the VVT system (Bank 1).
   

   HINT:

   When performing the Active Test, make sure the A/C is on and the shift lever is in N (neutral).

5. Check the engine speed while operating the Oil Control Valve (OCV) using the intelligent tester.
   

   OK*1:

   Tester Operation	Specified Condition
   OFF	Normal engine speed
   ON	Engine idles roughly or stalls

   Result 

   Result	Proceed to
   NG	A
   OK	B

   HINT:

   1. *1: From step 73, perform intake system troubleshooting (steps 85 to 87). If engine starting trouble still occurs, perform fuel system troubleshooting A (steps 88 to 95).
      
   2. Jiggle the wire harness and connector to increase the likelihood of detecting malfunctions that do not always occur.
      
   3. When the results of the inspection using the Active Test are normal but the valve operating noise is abnormal, check the valve for any signs of problems.
      
   4. If the camshaft timing oil control valve assembly is stuck ON, the valve overlap increases and combustion worsens due to the internal EGR which may cause the engine to stall.
      

B	Go to step 56

A
REPLACE CAMSHAFT TIMING OIL CONTROL VALVE ASSEMBLY (Click here)

1. Connect the intelligent tester to the DLC3.
   

2. Turn the ignition switch to ON.
   

3. Turn the tester on.
   

4. Start the engine and warm it up until the engine coolant temperature reaches 75°C (167°F) or more.
   

   HINT:

   1. When performing the Active Test, make sure the shift lever is in N or neutral.
      
   2. The air conditioning switch and all accessory switches should be off.
      

5. Enter the following menus: Powertrain / Engine and ECT / Active Test / Control the EGR Step Position.
   

6. Check the MAP and Engine Speed in Date List at the idling condition while performing Active Test.
   

   OK:

   MAP and idling condition change in response to EGR step position.
   

   
   

   Standard:

   
   

   -	EGR Step Position (Active Test)
   	0 Steps	0 to 30 Steps
   Idling condition	Steady idling	Idling changes from steady to rough idling
   MAP (Data List)	MAP value is 28 to 48 kPa (210 to 360 mmHg) (EGR valve is fully closed)	MAP value is at least +10 kPa (75 mmHg) higher than when EGR valve is fully closed

   HINT:

   1. Do not leave the EGR valve open for 10 seconds or more during the Active Test.
      
   2. Be sure to return the EGR valve to step 0 when Active Test is completed.
      

   Result 

   Result	Proceed to
   NG	A
   OK	B

B	Go to step 73

A

1. Remove the EGR valve assembly (Click here).
   

2. Check if the EGR valve is stuck open.
   

   OK:

   EGR valve is tightly closed (It is not stuck open)
   

   Result 

   Result	Proceed to
   NG	A
   OK	B

3. Reinstall the EGR valve assembly (Click here).
   

B	Go to step 73

A
REPLACE EGR VALVE ASSEMBLY (Click here)

1. Check the harnesses and connectors, referring to DTC P0107 inspection procedure (Click here).
   

HINT:

1. Jiggle the wire harness and connector to increase the likelihood of detecting malfunctions that do not always occur.
   
2. Make sure there is not an excessive amount of force applied to the wire harness.
   
3. If the wire harness is normal, after replacing the manifold absolute pressure sensor, check if engine starting trouble occurs again. If engine starting trouble occurs again, proceed to step 73 and perform intake system troubleshooting (steps 85 to 87). If engine starting trouble still occurs, perform fuel system troubleshooting A (steps 88 to 95).
   

NG	REPAIR OR REPLACE HARNESS OR CONNECTOR

OK
REPLACE MANIFOLD ABSOLUTE PRESSURE SENSOR (Click here)

1. Inspect the engine coolant temperature sensor (Click here).
   

   HINT:

   If the engine coolant temperature sensor is malfunctioning, after replacing it, check if engine starting trouble occurs again. If engine starting trouble occurs, replace the ECM. If engine starting trouble still occurs, proceed to step 73 and perform fuel system troubleshooting A (steps 96 to 103), fuel system troubleshooting B (steps 104 to 106), intake system troubleshooting (steps 107 to 109), and ignition system troubleshooting (steps 110 to 115), in that order.

NG	REPLACE ENGINE COOLANT TEMPERATURE SENSOR (Click here)

OK

1. Check the harnesses and connectors, referring to DTC P0115 inspection procedure (Click here).
   

HINT:

1. Jiggle the wire harness and connector to increase the likelihood of detecting malfunctions that do not always occur.
   
2. Make sure there is not an excessive amount of force applied to the wire harness.
   
3. If the wire harness or connector is malfunctioning, after replacing or repairing it, check if engine starting trouble occurs again. If engine starting trouble occurs, replace the ECM. If engine starting trouble still occurs, proceed to step 73 and perform fuel system troubleshooting A (steps 96 to 103), fuel system troubleshooting B (steps 104 to 106), intake system troubleshooting (steps 107 to 109), and ignition system troubleshooting (steps 110 to 115), in that order.
   

NG	REPAIR OR REPLACE HARNESS OR CONNECTOR

OK

1. Connect the intelligent tester to the DLC3.
   

2. Turn the ignition switch to ON.
   

3. Turn the tester on.
   

4. Enter the following menus: Powertrain / Engine and ECT / Data List / MAP.
   

5. Read the MAP value.
   

   Standard:

   Same as actual atmospheric pressure.
   

   HINT:

   Reference MAP value:

   Engine Condition	Specified Condition
   Idling with warm engine	28 to 48 kPa
   IG ON, engine stopped	80 to 110 kPa*

   *: Varies with weather condition.

HINT:

If the manifold absolute pressure sensor is malfunctioning, after replacing it, check if engine starting trouble occurs again. If engine starting trouble occurs, replace the ECM. If engine starting trouble still occurs, proceed to step 73 and perform fuel system troubleshooting A (steps 96 to 103), fuel system troubleshooting B (steps 104 to 106), intake system troubleshooting (steps 107 to 109), and ignition system troubleshooting (steps 110 to 115), in that order.

NG	REPLACE MANIFOLD ABSOLUTE PRESSURE SENSOR (Click here)

OK

1. Check the harnesses and connectors, referring to DTC P0107 inspection procedure (Click here).
   

HINT:

1. Jiggle the wire harness and connector to increase the likelihood of detecting malfunctions that do not always occur.
   
2. Make sure there is not an excessive amount of force applied to the wire harness.
   
3. If the wire harness or connector is malfunctioning, after replacing or repairing it, check if engine starting trouble occurs again. If engine starting trouble occurs, replace the ECM. If engine starting trouble still occurs, proceed to step 73 and perform fuel system troubleshooting A (steps 96 to 103), fuel system troubleshooting B (steps 104 to 106), intake system troubleshooting (steps 107 to 109), and ignition system troubleshooting (steps 110 to 115), in that order.
   

NG	REPAIR OR REPLACE HARNESS OR CONNECTOR

OK

1. Connect the intelligent tester to the DLC3.
   

2. Turn the ignition switch to ON.
   

3. Turn the tester on.
   

4. Enter the following menus: Powertrain / Engine and ECT / Data List / Atmosphere Pressure and Long FT #1.
   
   

   Result 

   Data List Item	Result	Suspected Area	Proceed to
   Atmosphere Pressure	80 kPa (600 mmHg) or less (when altitude is 0 m)	Air fuel ratio sensor Heated oxygen sensor Manifold absolute pressure sensor Fuel injector ECM	A
   Long FT #1	+25% or more or less than -25%
   Both Data List items listed above	Values are other than above	-	B

B	Go to step 67

A

1. Remove the EFI MAIN fuse and ETCS fuse from the engine room relay block.
   

2. After 60 seconds or more elapse, install the EFI MAIN fuse and ETCS fuse.
   

3. Check if the engine can be started.
   

   Result 

   Result	Proceed to
   Engine can be started	A
   Engine cannot be started	B

B	Go to step 67

A

1. Connect the intelligent tester to the DLC3.
   

2. Turn the ignition switch to ON.
   

3. Turn the tester on.
   

4. Enter the following menus: Powertrain / Engine and ECT / Data List / Fuel System Status #1.
   

5. Confirm that Fuel System Status #1 is CL.
   

6. Enter the following menus: Powertrain / Engine and ECT / Data List / AF Lambda B1S1.
   

7. Confirm that AF Lambda B1S1 is within the range of 0.95 to 1.05 when idling.
   

8. Enter the following menus: Powertrain / Engine and ECT / Active Test / Control the Injection Volume for A/F Sensor.
   

9. Read the output voltage from the air fuel ratio sensor when increasing and decreasing the fuel injection volume.
   

   Standard:

   Tester Display	Injection Volume	Specified Condition
   Air fuel ratio sensor voltage	+25%	Air fuel ratio sensor output voltage is below 3.1 V
   	-12.5%	Air fuel ratio sensor output voltage is higher than 3.4 V

HINT:

1. The air fuel ratio sensor has an output delay of a few seconds and the heated oxygen sensor has a maximum output delay of approximately 20 seconds.
   
2. If the air fuel ratio sensor is malfunctioning, after replacing it, check if engine starting trouble occurs again. If engine starting trouble occurs, replace the ECM. If engine starting trouble still occurs, proceed to step 73 and perform fuel system troubleshooting A (steps 96 to 103), fuel system troubleshooting B (steps 104 to 106), intake system troubleshooting (steps 107 to 109), and ignition system troubleshooting (steps 110 to 115), in that order.
   

NG	REPLACE AIR FUEL RATIO SENSOR (Click here)

OK

1. Check if the idling speed is stable after starting the engine.
   

   OK:

   Speed is stable.
   

   HINT:

   After replacing the fuel injector or manifold absolute pressure sensor, check if engine starting trouble occurs again. If engine starting trouble occurs, replace the ECM. If engine starting trouble still occurs, proceed to step 73 and perform fuel system troubleshooting A (steps 96 to 103), fuel system troubleshooting B (steps 104 to 106), intake system troubleshooting (steps 107 to 109), and ignition system troubleshooting (steps 110 to 115), in that order.

NG	REPLACE FUEL INJECTOR ASSEMBLY (Click here)

OK
REPLACE MANIFOLD ABSOLUTE PRESSURE SENSOR (Click here)

1. Check the fuel pressure (Click here).
   

NG	Go to step 72

OK

1. Inspect the spark plugs (Click here).
   

   Result 

   Result	Proceed to
   All cylinders are normal	A
   One cylinder is abnormal*1	B
   All cylinders are abnormal*2, *3	C

HINT:

1. *1: If one cylinder is abnormal, replace the spark plug of that cylinder and inspect the ignition and fuel system for that cylinder. After performing repairs, check if engine starting trouble occurs again. If engine starting trouble still occurs, proceed to step 73 and perform fuel system troubleshooting A (steps 96 to 103), fuel system troubleshooting B (steps 104 to 106), intake system troubleshooting (steps 107 to 109), and ignition system troubleshooting (steps 110 to 115), in that order.
   
2. *2: If all cylinders are abnormal, replace the spark plugs of all cylinders and check if engine starting trouble occurs again. If engine starting trouble still occurs, proceed to step 73 and perform fuel system troubleshooting A (steps 96 to 103), fuel system troubleshooting B (steps 104 to 106), intake system troubleshooting (steps 107 to 109), and ignition system troubleshooting (steps 110 to 115), in that order.
   
3. *3: Engine starting trouble may occur if the vehicle is driven extremely short distances repeatedly.
   

B	REPLACE SPARK PLUG (ABNORMAL CYLINDER) (Click here)
C	REPLACE SPARK PLUG (ALL CYLINDER) (Click here)

A

1. Confirm the conditions present when the malfunction occurred based on the customer problem analysis.
   
   

   Result 

   Problem Symptom	Suspected Area	Proceed to
   When the engine is stopped and a long time has passed, engine starting trouble occurs*1	Pressure regulator is stuck open	A
   When the engine is stopped and approximately 15 to 120 minutes have passed, engine starting trouble occurs*2	Fuel injector leak	B
   When the engine is stopped and approximately 2 to 3 minutes have passed, engine starting trouble occurs*3	Failure to maintain fuel pressure by pressure regulator	A
   Condition other than above, or there is an inconsistency in the conditions present when engine starting trouble occurs	-	C*4

   HINT:

   *1: The pressure regulator may be stuck open. Attach a fuel pressure gauge and check the ability to maintain fuel pressure after stopping the engine.

   *2: Fuel may be leaking from the fuel injector.

   *3: The pressure regulator may not be able to maintain the fuel pressure. Attach a fuel pressure gauge and check the ability to maintain fuel pressure after stopping the engine.

   *4: From step 73, perform fuel system troubleshooting A (steps 96 to 103), fuel system troubleshooting B (steps 104 to 106), intake system troubleshooting (steps 107 to 109), and ignition system troubleshooting (steps 110 to 115), in that order.

B	Go to step 71
C	Go to step 73

A

HINT:

For the fuel pressure inspection, refer to the following procedures (Click here).

1. Attach a fuel pressure gauge and check the fuel pressure after stopping the engine.
   

   Result 

   Result	Proceed to
   Less than 147 kPa (1.5 kgf/cm2) (5 minutes after stopping the engine)	A
   147 kPa (1.5 kgf/cm2) or higher (5 minutes after stopping the engine)	B*1

   HINT:

   1. If the engine cannot be started, check the fuel pressure after cranking the engine.
      
   2. *1: From step 73, perform fuel system troubleshooting A (steps 96 to 103), fuel system troubleshooting B (steps 104 to 106), intake system troubleshooting (steps 107 to 109), and ignition system troubleshooting (steps 110 to 115), in that order.
      

B	Go to step 73

A
REPLACE FUEL PRESSURE REGULATOR ASSEMBLY (Click here)

1. Clean the inside of the surge tank with compressed air.
   

2. After stopping the engine, measure the HC concentration inside the surge tank for 15 minutes.
   

   Result 

   Result	Proceed to
   400 ppm or higher	A
   Less than 400 ppm	B*1

   HINT:

   1. If the concentration is 400 ppm or higher, the fuel injector may have a sealing problem.
      
   2. *1: From step 73, perform fuel system troubleshooting A (steps 96 to 103), fuel system troubleshooting B (steps 104 to 106), intake system troubleshooting (steps 107 to 109), and ignition system troubleshooting (steps 110 to 115), in that order.
      

B	Go to step 73

A
REPLACE FUEL INJECTOR ASSEMBLY (Click here)

1. Connect the intelligent tester to the DLC3.
   

2. Turn the ignition switch to ON.
   

3. Turn the tester on.
   

4. Enter the following menus: Powertrain / Engine and ECT / Active Test / Control the Fuel Pump/Speed.
   

5. When performing the Active Test, check for fuel leakage from the fuel pipes.
   

   Result 

   Result	Proceed to
   Fuel leakage or signs of fuel leakage are present	A
   No fuel leakage or signs of fuel leakage	B

   HINT:

   1. Jiggle the wire harness and connector to increase the likelihood of detecting malfunctions that do not always occur.
      
   2. Check if the vehicle ran out of fuel, as engine starting trouble due to running out of fuel is also detected.
      
   3. If there are no fuel leaks, after inspecting the fuel pump control system. check if engine starting trouble occurs again. If engine starting trouble still occurs, proceed to step 73 and perform fuel system troubleshooting A (steps 96 to 103), fuel system troubleshooting B (steps 104 to 106), intake system troubleshooting (steps 107 to 109), and ignition system troubleshooting (steps 110 to 115), in that order.
      

B	CHECK FUEL PUMP CONTROL CIRCUIT (Click here)

A
REPAIR OR REPLACE FUEL LINE

1. If the malfunction could not be identified during the inspection in steps 38, 39, 40 and 47, perform fuel system troubleshooting C (steps 74 to 78).
   
   

   Result 

   Performed Step	Troubleshooting by System	Procedure	Proceed to
   Steps 38, 39, 40 and 47	Fuel system troubleshooting C	74 to 78	A

2. If the malfunction could not be identified during the inspection in step 45, perform ignition system troubleshooting (steps 79 to 84).
   
   

   Result 

   Performed Step	Troubleshooting by System	Procedure	Proceed to
   Step 45	Ignition system troubleshooting	79 to 84	B

3. If the malfunction could not be identified during the inspection in steps 55 and 58, perform intake air system troubleshooting (steps 85 to 87). If engine starting trouble still occurs, perform fuel intake system troubleshooting A (steps 88 to 95).
   
   

   Result 

   Performed Step	Troubleshooting by System	Procedure	Proceed to
   Step 55 and 58	Intake air system troubleshooting	85 to 87	C
   	Fuel system troubleshooting A	88 to 95

4. If the malfunction could not be identified during the inspection in steps 59, 60, 61, 62, 65, 66, 68, 69, 70, 71 and 72, perform fuel system troubleshooting A (steps 96 to 103), fuel system troubleshooting B (steps 104 to 106), intake air system troubleshooting (steps 107 to 109), and ignition system troubleshooting (steps 110 to 115), in that order.
   
   

   Result 

   Performed Step	Troubleshooting by System	Procedure	Proceed to
   Steps 59, 60, 61, 62, 65, 66, 68, 69, 70, 71 and 72	Fuel system troubleshooting A	96 to 103	D
   	Fuel system troubleshooting B	104 to 106
   	Intake air system troubleshooting	107 to 109
   	Ignition system troubleshooting	110 to 115

B	Go to step 79
C	Go to step 85
D	Go to step 96

A

1. Inspect the fuel injector (Click here).
   

NG	REPLACE FUEL INJECTOR ASSEMBLY (Click here)

OK

1. Check the harnesses and connectors, referring to Fuel Injector Circuit inspection procedure (Click here).
   

HINT:

1. Jiggle the wire harness and connector to increase the likelihood of detecting malfunctions that do not always occur.
   
2. Make sure there is not an excessive amount of force applied to the wire harness.
   

NG	CHECK FUEL INJECTOR CIRCUIT (Click here)

OK

1. Check the harnesses and connectors, referring to Fuel Injector Circuit inspection procedure (Click here).
   

HINT:

1. Jiggle the wire harness and connector to increase the likelihood of detecting malfunctions that do not always occur.
   
2. Make sure there is not an excessive amount of force applied to the wire harness.
   

NG	REPAIR OR REPLACE HARNESS OR CONNECTOR

OK

1. Replace the crankshaft position sensor (Click here).
   

2. Check the engine start operation.
   

   OK:

   Malfunction has been repaired successfully.
   

NG	Go to step 78

OK
END (CRANKSHAFT POSITION SENSOR IS DEFECTIVE)

1. Replace the camshaft position sensor (Click here).
   

2. Check the engine start operation.
   

   OK:

   Malfunction has been repaired successfully.
   

NG	REPLACE ECM (Click here)

OK
END (CAMSHAFT POSITION SENSOR IS DEFECTIVE)

1. Check the tightening and installation condition of the crankshaft position sensor bolt.
   

2. Check the connection of the crankshaft position sensor connector.
   

   OK:

   Sensor is installed correctly.
   

NG	SECURELY REINSTALL CRANKSHAFT POSITION SENSOR (Click here)

OK

1. Check the tightening and installation condition of the camshaft position sensor bolt.
   

2. Check the connection of the camshaft position sensor connector.
   

   OK:

   Sensor is installed correctly.
   

NG	SECURELY REINSTALL CAMSHAFT POSITION SENSOR (Click here)

OK

1. Check the harnesses and connectors, referring to DTC P0335 inspection procedure (Click here).
   

HINT:

1. Jiggle the wire harness and connector to increase the likelihood of detecting malfunctions that do not always occur.
   
2. Make sure there is not an excessive amount of force applied to the wire harness.
   

NG	REPAIR OR REPLACE HARNESS OR CONNECTOR

OK