DTC    P1603    Engine Stall History
DTC    P1605    Rough Idling

for Preparation Click here

DESCRIPTION

1. P1603
   

1. *1: for CVT
   

1. P1605
   

WIRING DIAGRAM

INSPECTION PROCEDURE

HINT:

1. In contrast to normal malfunction diagnosis for components, circuit and systems, DTCs P1603 and P1605 are used to determine the malfunctioning area from the problem symptoms and freeze frame data when the user mentions problems such as engine stall.
   As these DTCs can be stored as a result of certain user actions, even if these DTCs are output, if the customer makes no mention of problems, clear these DTCs 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. Use any information from the customer problem analysis about the condition of the vehicle at the time when the problem occurred (how the engine stopped, conditions when the engine was restarted, etc.) as a reference.
   
   

   Symptom	Suspected Area
   Engine vibration occurs and engine stops	Air-fuel ratio abnormal
   Engine stops with no engine vibration	Ignition system, injection stoppage, high load from external parts
   Engine can be started with accelerator pedal depressed	Insufficient air volume
   Rough idling after engine started	Air-fuel ratio abnormal, abnormal combustion

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 DTC P1603 (Engine Stall History) is stored, DTC P1605 (Rough Idling) is also stored. When confirming freeze frame data, check DTC P1605. (The ECM stores DTC P1605 first. Therefore, the 5 sets of freeze frame data can be confirmed through DTC P1605, enabling the technician to obtain more information.)
   
7. When confirming freeze frame data, if there are multiple items related to the cause of the malfunction, perform troubleshooting for all related items.
   
8. Try to operate the vehicle under the conditions recorded in the freeze frame data which were present when the malfunction occurred. Confirm the data at this time and the data when the engine is idling (engine warmed up, no load, and shift lever in D or N) and compare these data with the freeze frame data.
   
9. Inspections take into account the fact that the malfunction may not have reoccurred and place emphasis on checking the vehicle conditions present at the time when the malfunction occurred.
   
10. When performing inspections, jiggle the relevant wire harness and connectors in an attempt to reproduce malfunctions that do not always occur.
    

Inspection flow:

Using freeze frame data, narrow down the parts to be inspected according to the vehicle conditions at the time when the malfunction occurred.

1. P1603
   

1. 1:
   

1. If the engine stalled when the intake air volume was low (during idling or deceleration), there may be a decrease in torque due to an incorrect air-fuel ratio, etc.
   
2. If the engine stalled when the intake air volume was high (during driving or acceleration), there may be a major malfunction such as continuous misfire due to ignition stoppage, fuel injection stoppage, etc. and the torque drops to zero.
   

1. 2:
   

1. If the engine speed decreased slowly, there may have been a decrease in torque due to an air-fuel ratio that was incorrect (by approximately 20 to 30%), etc.
   
2. If the engine speed decreased rapidly, there may have been a malfunction such as when the engine misfires almost continuously due to ignition stoppage, fuel injection stoppage, etc., or when the external load increases due to an external part malfunctioning.
   

1. 3:
   

1. If the air-fuel ratio was abnormal, there may have been an intake air leak, sensor malfunction, or fuel supply problem.
   
2. If the air-fuel ratio was normal, the air volume may have been insufficient, the ignition timing may have been incorrect or the EGR valve may have been stuck open.
   

1. P1605:
   

1. 1:
   

1. If the engine speed decreased slowly, there may have been a decrease in torque due to an air-fuel ratio that was incorrect (by approximately 20 to 30%), etc.
   
2. If the engine speed decreased rapidly, there may have been a malfunction such as when the engine misfires almost continuously due to ignition stoppage, fuel injection stoppage, etc., or when the external load increases due to an external part malfunctioning.
   

1. 2:
   

1. If the air-fuel ratio was abnormal, there may have been an intake air leak, sensor malfunction, or fuel supply problem.
   
2. If the air-fuel ratio was normal, the air volume may have been insufficient, the ignition timing may have been incorrect or the EGR valve may have been stuck open.
   

NOTICE:

Inspect the fuses for circuits related to this system before performing the following inspection procedure.

1. Connect the intelligent tester to the DLC3.
   

2. Turn the ignition switch to ON.
   

3. Read the DTCs.
   

   Result 

   Result	Proceed to
   Only DTC P1603 and/or P1605 are output	A
   DTCs other than P1603 and P1605 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. 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 

   Problem Symptom	Freeze Frame Data Item for DTC P1605			Suspected Area	Proceed to
   	Closed Throttle Position SW	Engine Speed	Total of Short FT and Long FT
   When idling or decelerating, engine speed slowly decreases and engine stalls	All 5 sets of freeze frame data are ON	Decreases slowly*1	All 5 sets of freeze frame data are +15% or more*2	Air suction Sensor malfunction (value from sensor too lean) Fuel supply problem	A
   			At least 1 of the 5 sets of freeze frame data is -15% or less*3	Sensor malfunction (value from sensor too rich)	B
   			All 5 sets of freeze frame data are from -15% to +15%	Intake air volume insufficient Ignition timing incorrect	C
   When idling or decelerating, engine speed rapidly decreases and engine stalls		Decreases rapidly*1	-	Injection stoppage, ignition stoppage Load from external parts	D
   When accelerating or driving at constant speed and engine stalls*4	At least one is OFF	-	-	Sensor malfunction Injection stoppage, ignition stoppage Fuel supply problem	E

   
   
   
   

   HINT:

   1. *1: A rapid decrease in engine speed may have been caused by an electrical malfunction in the shared wiring of all or multiple cylinders, an increase in load from external parts, etc. The engine speed is considered to have decreased rapidly if either of the following conditions apply.
      Otherwise, the engine speed is considered to have decreased slowly.
      
   1. In the freeze frame data, the decrease in engine speed from #3 to #5 is 400 rpm or more.
      
   2. In the freeze frame data, the engine speed at #5 is 120 rpm or less.
      
   2. If the vehicle speed is 18 km/h (11 mph) or less and the difference between the Engine Speed and SPD (NOUT) is 100 rpm or less, inspect the CVT. (Depending on the rate of vehicle deceleration, the engine speed may have decreased due to the CVT lock-up release being late.)
      
   3. *2: When a DTC is stored, feedback compensation increases because the air-fuel ratio is determined to be lean.
      
   4. *3: When a DTC is stored, feedback compensation decreases because the air-fuel ratio is determined to be rich.
      
   5. *4: This item should be checked when DTC P1603 is output and is not necessary to check when only P1605 is output.
      

B	Go to step 25
C	Go to step 35
D	Go to step 44
E	Go to step 52

A

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

   HINT:

   1. 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.
      
   2. If Short FT and Long FT are largely different from the normal values when idling (the intake air volume is small) and almost the same as the normal values when racing the engine (the intake air volume is high), air suction may be present.
      

   OK:

   There is no air suction.
   

NG	REPAIR OR REPLACE INTAKE SYSTEM

OK

1. Disconnect the purge hose (on the canister side) of the purge VSV.
   

2. Start the engine.
   

3. Idle the engine.
   

4. Disconnect the connector of the purge VSV.
   

5. Check if air flows through the purge VSV.
   

   OK:

   Air does not flow.
   

6. Connect the connector of the purge VSV.
   

7. Connect the purge hose of the purge VSV.
   

   HINT:

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

NG	INSPECT PURGE VSV (Click here)

OK

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 for DTC P1605	Result	Suspected Area	Proceed to
   Stop Light Switch	At least 1 of the 5 sets of freeze frame data is ON	Air suction from Brake booster	A
   	All 5 sets of freeze frame data are OFF	-	B

B	Go to step 7

A

1. Connect the intelligent tester to the DLC3.
   

2. Turn the ignition switch to ON.
   

3. Start the engine, turn off all accessory switches and warm up the engine until the engine coolant temperature stabilizes.
   

4. Idle the engine.
   

5. Turn the tester on.
   

6. Enter the following menus: Powertrain / Engine and ECT / Data List / Short FT #1.
   

   Standard:

   Short FT #1 changes by +10% or less.
   

   Result 

   Result	Proceed to
   OK	A
   NG (for LHD)	B
   NG (for RHD)	C

   HINT:

   1. Even if the results are normal, the Brake booster may have been malfunctioning. Continue this inspection procedure until step 24, and if there are no problems with other parts, replace the brake booster (refer to step 59).
      
   2. When air suction is present, the feedback compensation increases because the air-fuel ratio becomes lean.
      
   3. It is also possible to perform the airtightness inspection to check the brake booster.
      

B	REPLACE BRAKE BOOSTER ASSEMBLY (FOR LHD) (Click here)
C	REPLACE BRAKE BOOSTER ASSEMBLY (FOR RHD) (Click here)

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 for DTC P1605	Result	Suspected Area	Proceed to
   Calculate Load	Below 90% of the current value of the vehicle*1	Manifold absolute pressure sensor	A
   AFS Voltage B1S1	3.3 V or higher*2	Air fuel ratio sensor Wire harness or connector Actual air-fuel ratio abnormal	B
   Both freeze frame data items listed above	Values are other than above	-	C

   HINT:

   1. Try to operate the vehicle under the conditions recorded in the freeze frame data which were present when the malfunction occurred. Confirm the data at this time and the data when the engine is idling (engine warmed up, no load, and shift lever in D or N) and compare these data with the freeze frame data.
      
   2. *1: If the manifold absolute pressure sensor is malfunctioning and incorrectly measures the pressure to be less than the actual intake manifold pressure, the freeze frame data will show a low engine load value.
      
   3. *2: If the air fuel ratio sensor is malfunctioning and constantly outputs a value indicating the air-fuel ratio is lean, the actual air-fuel ratio will become rich and the engine may stall.
      

B	Go to step 9
C	Go to step 12

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 / 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:

Even if the results are normal, the manifold absolute pressure sensor may have been malfunctioning. Continue this inspection procedure until step 24, and if there are no problems with other parts, replace the manifold absolute pressure sensor (refer to step 59).

B	Go to step 12

A
REPLACE MANIFOLD ABSOLUTE PRESSURE SENSOR (Click here)

1. Connect the intelligent tester to the DLC3.
   

2. Turn the ignition switch to ON.
   

3. Start the engine, turn off all accessory switches and warm up the engine until the engine coolant temperature stabilizes.
   

4. Idle the engine.
   

5. Turn the tester on.
   

6. Enter the following menus: Powertrain / Engine and ECT / Active Test / Control the injection volume.
   

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

   Standard:

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

   Result 

   Result	Proceed to
   Abnormal	A
   Normal	B

   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. Even if the results are normal, the air fuel ratio sensor may have been malfunctioning. Continue this inspection procedure until step 24, and if there are no problems with other parts, replace the air fuel ratio sensor (refer to step 59).
      

B	Go to step 12

A

1. Check the harnesses and connectors, referring to DTC P0031 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 (A/F SENSOR POWER SOURCE) (Click here)

OK

1. Check the harnesses and connectors, referring to DTC P2195 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 AIR FUEL RATIO SENSOR (Click here)

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 for DTC P1605	Result	Proceed to
   Ambient Temperature, Initial Engine Coolant Temp, Initial Intake Air Temp	Difference in temperature between each item is below 10°C (18°F)*1	A
   	Difference in temperature between each item is 10°C (18°F) or more*2	B

   HINT:

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

B	Go to step 15

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 for DTC P1605	Result	Suspected Area	Proceed to
   Coolant Temp, Engine Run Time, Initial Engine Coolant Temp	Range A	Engine coolant temperature sensor Thermostat (Water inlet)	A
   	Range B	Engine coolant temperature sensor	B
   	Range C	-	C

   HINT:

   This step is not directly related to engine stall.

B	Go to step 16
C	Go to step 17

A

1. Inspect the thermostat (water inlet) (Click here).
   

   Result 

   Result	Proceed to
   Abnormal	A
   Normal	B

   HINT:

   This step is not directly related to engine stall.

B	Go to step 16

A
REPLACE THERMOSTAT (WATER INLET) (Click here)

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 for DTC P1605	Result	Suspected Area	Proceed to
   Coolant Temp	120°C (248°F) or more	Engine coolant temperature sensor	A
   Coolant Temp, Ambient Temperature	Engine coolant temperature is lower than outside temperature by 15°C (27°F) or more	Engine coolant temperature sensor
   Both freeze frame data items listed above	Values are other than above	-	B

B	Go to step 17

A

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

   Result 

   Result	Proceed to
   Abnormal	A
   Normal	B

   HINT:

   Even if the results are normal, the engine coolant temperature sensor may have been malfunctioning. Continue this inspection procedure until step 24, and if there are no problems with other parts, replace the engine coolant temperature sensor (refer to step 59).

B	Go to step 17

A
REPLACE ENGINE COOLANT TEMPERATURE SENSOR (Click here)

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 for DTC P1605	Result	Suspected Area	Proceed to
   EVAP (Purge) VSV	At least 1 of the 5 sets of freeze frame data is not 0%	Purge VSV	A
   	All 5 sets of freeze frame data are 0%	-	B

   HINT:

   If the purge VSV is stuck closed, air-fuel ratio compensation by the purge is incorrectly adjusted, and then the air-fuel ratio becomes lean and the engine may stall.

B	Go to step 22

A

1. Connect an intelligent tester to the DLC3.
   

2. Disconnect the purge VSV hose (charcoal canister side) from the purge VSV.
   

3. Start the engine.
   

4. Turn the tester on.
   

5. Enter the following menus: Powertrain / Engine and ECT / Active Test / Activate the VSV for Evap Control.
   

6. When the purge VSV is operated using the intelligent tester, check whether the port of the purge VSV applies suction to your finger.
   

   OK:

   Tester Operation	Specified Condition
   VSV ON	Purge VSV port applies suction to finger
   VSV OFF	Purge VSV port applies no suction to finger

   Result 

   Result	Proceed to
   Abnormal	A
   Normal	B

   HINT:

   1. Jiggle the wire harness and connector to increase the likelihood of detecting malfunctions that do not always occur.
      
   2. Even if the results are normal, the purge VSV may have been malfunctioning. Continue this inspection procedure until step 24, and if there are no problems with other parts, replace the purge VSV (refer to step 59).
      

7. Reconnect the purge VSV hose.
   

B	Go to step 22

A

1. Inspect the purge VSV (Click here).
   

NG	REPLACE PURGE VSV (Click here)

OK

1. Check the harnesses and connectors, referring to DTC P0443 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 (PURGE VSV POWER SOURCE) (Click here)

OK

1. Check the harnesses and connectors, referring to DTC P0443 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 an 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. Check whether the fuel pump operating sound occurs when performing the Active Test on the tester.
   

   OK:

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

   Result 

   Result	Proceed to
   NG	A
   OK	B

   HINT:

   1. Jiggle the wire harness and connector to increase the likelihood of detecting malfunctions that do not always occur.
      
   2. While performing the Active Test, make sure that there is no fuel leakage from the pipes, no signs that fuel has leaked, and no fuel smell.
      
   3. If the fuel pump operating noise is abnormal, proceed to step 23.
      

B	Go to step 24

A

1. Inspect the fuel pump (Click here).
   

NG	REPLACE FUEL PUMP (Click here)

OK
CHECK FUEL PUMP CONTROL CIRCUIT (Click here)

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

   HINT:

   If there is foreign matter such as iron particles on the fuel pump, fuel filter or fuel tank, remove the foreign matter.

B	Go to step 59

A
REPAIR OR REPLACE FUEL SYSTEM (Click here)

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 for DTC P1605	Result	Suspected Area	Proceed to
   Calculate Load	110% or more of the current value of the vehicle*1	Manifold absolute pressure sensor	A
   AFS Voltage B1S1	Below 3.3 V*2	Air fuel ratio sensor Harness and connector Actual air fuel ratio abnormal	B
   Both freeze frame data items listed above	Values are other than above	-	C

   HINT:

   1. Try to operate the vehicle under the conditions recorded in the freeze frame data which were present when the malfunction occurred. Confirm the data at this time and the data when the engine is idling (engine warmed up, no load, and shift lever in D or N) and compare these data with the freeze frame data.
      
   2. *1: If the manifold absolute pressure sensor is malfunctioning and incorrectly measures the intake air volume to be higher than the actual intake air volume, the freeze frame data will show a high engine load value.
      
   3. *2: As the air fuel ratio sensor output is low before the sensor warms up, the value at that time cannot be used for diagnosis. If the air fuel ratio sensor is malfunctioning and constantly outputs a value indicating the air-fuel ratio is rich, the actual air-fuel ratio will become lean and the engine may stall.
      

B	Go to step 27
C	Go to step 30

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 / 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.

   Result 

   Result	Proceed to
   Abnormal	A
   Normal	B

HINT:

Even if the results are normal, the manifold absolute pressure sensor may have been malfunctioning. Continue this inspection procedure until step 34, and if there are no problems with other parts, replace the manifold absolute pressure sensor (refer to step 59).

B	Go to step 30

A
REPLACE MANIFOLD ABSOLUTE PRESSURE SENSOR (Click here)

1. Connect the intelligent tester to the DLC3.
   

2. Turn the ignition switch to ON.
   

3. Start the engine, turn off all accessory switches and warm up the engine until the engine coolant temperature stabilizes.
   

4. Idle the engine.
   

5. Turn the tester on.
   

6. Enter the following menus: Powertrain / Engine and ECT / Active Test / Control the injection volume.
   

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

   Standard:

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

   Result 

   Result	Proceed to
   Abnormal	A
   Normal	B

   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. Even if the results are normal, the air fuel ratio sensor may have been malfunctioning. Continue this inspection procedure until step 34, and if there are no problems with other parts, replace the air fuel ratio sensor (refer to step 59).
      

B	Go to step 30

A

1. Check the harnesses and connectors, referring to DTC P0031 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 (A/F SENSOR POWER SOURCE) (Click here)

OK

1. Check the harnesses and connectors, referring to DTC P2195 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 AIR FUEL RATIO SENSOR (Click here)

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 for DTC P1605	Result	Proceed to
   Ambient Temperature, Initial Engine Coolant Temp, Initial Intake Air Temp	Difference in temperature between each item is below 10°C (18°F)*1	A
   	Difference in temperature between each item is 10°C (18°F) or more*2	B

   HINT:

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

B	Go to step 33

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 present when the DTC was stored which are recorded in the freeze frame data (Click here).
   

   
   
   
   
   

   Result 

   Freeze Frame Data Item for DTC P1605	Result	Suspected Area	Proceed to
   Coolant Temp, Engine Run Time, Initial Engine Coolant Temp	Range A	Engine coolant temperature sensor Thermostat (Water inlet)	A
   	Range B	Engine coolant temperature sensor	B
   	Range C	-	C

   HINT:

   This step is not directly related to engine stall.

B	Go to step 34
C	Go to step 60

A

1. Inspect the thermostat (water inlet) (Click here).
   

HINT:

This step is not directly related to engine stall.

B	Go to step 34

A
REPLACE THERMOSTAT (WATER INLET) (Click here)

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 for DTC P1605	Result	Suspected Area	Proceed to
   Coolant Temp	120°C (248°F) or more	Engine coolant temperature sensor	A
   Coolant Temp, Ambient Temperature	Engine coolant temperature is lower than outside temperature by 15°C (27°F) or more	Engine coolant temperature sensor
   Both freeze frame data items listed above	Values are other than above	-	B

B	Go to step 60

A

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

   Result 

   Result	Proceed to
   Abnormal	A
   Normal	B

   HINT:

   Even if the results are normal, the engine coolant temperature sensor may have been malfunctioning. If there are no problems with other parts, replace the engine coolant temperature sensor (refer to step 59).

B	Go to step 59

A
REPLACE ENGINE COOLANT TEMPERATURE SENSOR (Click here)

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 for DTC P1605	Result	Suspected Area	Proceed to
   Total of ISC Learning Value and ISC Feedback Value	Below 80% of the current value of the vehicle*1	Throttle body assembly	A
   	120% or more of the current value of the vehicle*2		B
   	From 80 to 120% of the current value of the vehicle	-	C

   HINT:

   1. Try to operate the vehicle under the conditions recorded in the freeze frame data which were present when the malfunction occurred. Confirm the data at this time and the data when the engine is idling (engine warmed up, no load, and shift lever in D or N) and compare these data with the freeze frame data.
      
   2. *1: If the throttle body assembly has a temporary problem in which it cannot fully close, the intake air volume and engine speed increase. As a result, the ISC learning amount becomes less than the standard. At this time, if the Throttle body assembly returns to normal and fully closes, the intake air volume will be insufficient and the engine may stall.
      
   3. *2: If carbon accumulates on the Throttle body assembly and the intake air volume decreases, the ISC learning amount is increased to maintain the idling speed. If this situation continues, the ISC learning amount reaches the upper limit, the idling speed cannot be maintained causing idling to become unstable, and the engine may stall.
      

B	Go to step 37
C	Go to step 38

A

1. Check for foreign matter and signs that the Throttle body assembly was stuck, and also check that the valve and shaft move smoothly during operation.
   

   Result 

   Result	Proceed to
   Abnormal	A
   Normal	B

   HINT:

   Even if the results are normal, the Throttle body assembly may have been malfunctioning. Continue this inspection procedure until step 43, and if there are no problems with other parts, replace the Throttle body assembly (refer to step 59).

B	Go to step 38

A
REPLACE THROTTLE BODY ASSEMBLY (Click here)

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

   Result 

   Result	Proceed to
   Carbon in passage	A
   No carbon in passage	B

   HINT:

   Even if the results are normal, the Throttle body assembly may have been malfunctioning. Continue this inspection procedure until step 43, and if there are no problems with other parts, replace the Throttle body assembly (refer to step 59).

B	Go to step 38

A
REPLACE THROTTLE BODY ASSEMBLY (Click here)

1. Connect the intelligent tester to the DLC3.
   

2. Turn the intelligent tester on.
   

3. Warm up the engine.
   

4. Turn the tester on.
   

5. Enter the following menus: Powertrain / Engine and ECT / Active Test / Control the VVT system.
   

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

   OK:

   Tester Operation	Specified Condition
   OFF	Normal engine speed
   ON	Soon after OCV switched from OFF to ON, engine idles roughly or stalls

   HINT:

   1. Jiggle the wire harness and connector to increase the likelihood of detecting malfunctions that do not always occur.
      
   2. 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.
      
   3. If the camshaft timing oil control valve is stuck ON, the valve overlap increases and combustion worsens due to the internal EGR which may cause rough idle or cause the engine to stall.
      

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

OK

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 41

A

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

2. Check if the EGR valve assembly is stuck open.
   

   OK:

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

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

NG	REPLACE EGR VALVE ASSEMBLY (Click here)

OK

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 for DTC P1605		Suspected Area	Proceed to
   IGN Advance	Knock Correct Learn Value
   Differs from the current value of the vehicle by 10° or more	Below 3°	Engine coolant temperature sensor Manifold absolute pressure sensor Knock sensor	A
   	3° or more	-
   Differs from the current value of the vehicle by less than 10°	-	-	B

   HINT:

   1. Try to operate the vehicle under the conditions recorded in the freeze frame data which were present when the malfunction occurred. Confirm the data at this time and the data when the engine is idling (engine warmed up, no load, and shift lever in D or N) and compare these data with the freeze frame data.
      
   2. Even if the results are normal, the knock control sensor may have been malfunctioning. If there are no problems with other parts, replace the knock control sensor (refer to step 59).
      

B	Go to step 59

A

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

NG	REPLACE ENGINE COOLANT TEMPERATURE SENSOR (Click here)

OK

1. Inspect the manifold absolute pressure sensor (intake air temperature sensor) (Click here).
   

   HINT:

   If the intake air temperature sent to the ECM is higher than the standard due to the manifold absolute pressure sensor (intake air temperature sensor) malfunctioning, the ignition timing may become delayed.

NG	REPLACE MANIFOLD ABSOLUTE PRESSURE SENSOR (Click here)

OK
REPLACE KNOCK SENSOR (Click here)

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.
   
3. A rapid decrease in engine speed may have been caused by a malfunction in all or multiple cylinders. (There may be an electrical malfunction in the wiring shared by all the cylinders.)
   

NG	CHECK FUEL INJECTOR 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.
   
3. A rapid decrease in engine speed may have been caused by a malfunction in all or multiple cylinders. (There may be an electrical malfunction in the wiring shared by all the cylinders.)
   

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

OK

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
   Idle Spark Advn Ctrl (#1 to #3)	At least one cylinder shows a value of 4° or more	Ignition coil system	A
   	All cylinders show a value of less than 4°	-	B

B	Go to step 48

A

1. Change the location of the ignition coil for the cylinder whose Idle Spark Advn Ctrl (#1 to #3) was 4° or more in step 46.
   

2. Connect the intelligent tester to the DLC3.
   

3. Turn the ignition switch to ON.
   

4. Turn the tester on.
   

5. Enter the following menus: Powertrain / Engine and ECT / Data List / Idle Spark Advn Ctrl (#1 to #3).
   

   Result 

   Result	Proceed to
   Same as result in step 46	A
   Different from result in step 46	B

   HINT:

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

B	REPLACE IGNITION COIL (Click here)

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 for DTC P1605			Suspected Area	Proceed to
   A/C Signal	Air Conditioner FB Val	Power Steering Signal
   A/C Signal display changes from OFF to ON*1	Value is shown	-	A/C system	A*2 B*3
   	Value is 0 L/s	Does not change from OFF	-	C*4 D*5
   		Changes from OFF to ON	Power steering system
   A/C Signal display does not change from OFF*1	-	Changes from OFF to ON
   		Does not change from OFF	-

   1. *1: Check not only the ON/ OFF state of the air conditioner but also the change in air conditioner load.
      
   2. *2: for Automatic Air Conditioning
      
   3. *3: for Manual Air Conditioning
      
   4. *4: for CVT
      
   5. *5: for Manual Transaxle
      

   HINT:

   1. Try to operate the vehicle under the conditions recorded in the freeze frame data which were present when the malfunction occurred. Confirm the data at this time and the data when the engine is idling (engine warmed up, no load, and shift lever in D or N) and compare these data with the freeze frame data.
      
   2. The normal value for ISC learning amount is engine displacement (liters) x 0.9.
      
   3. Even if the results are normal, the power steering system may have been malfunctioning. Continue this inspection procedure until step 51, and if there are no problems with other parts, inspect the power steering system (refer to step 59).
      

B	CHECK AIR CONDITIONING SYSTEM (FOR MANUAL AIR CONDITIONING) (Click here)
C	Go to step 49
D	Go to step 50

A
CHECK AIR CONDITIONING SYSTEM (FOR AUTOMATIC AIR CONDITIONING) (Click here)

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 for DTC P1605				Suspected Area	Proceed to
   Electrical Load Signal, Electrical Load compensation amount	Electrical Load compensation amount	Difference between Engine Speed and Turbine Speed	Vehicle Speed
   Electrical Load Signal display changes from OFF to ON*1, or Value displayed for Electric Load Feedback Val increases*1	Value displayed for Electric Load Val changes	-	-	Electrical load signal circuit	A
   	Value displayed for Electric Load Val does not change	At least 1 of the 5 sets of freeze frame data is below 100 rpm	Below 18 km/h (11.1 mph)	CVT system	B
   			18 km/h (11.1 mph) or more	-	C
   		All 5 sets of freeze frame data are 100 rpm or more	-	-	C
   Electrical Load Signal display does not change from OFF, or Value displayed for Electric Load Feed back Val does not increase	-	At least 1 of the 5 sets of freeze frame data is below 100 rpm	Below 18 km/h (11.1 mph)	CVT system	B
   			18 km/h (11.1 mph) or more	-	C
   		All 5 sets of freeze frame data are 100 rpm or more	-	-	C

   1. *1: If the Electrical Load Signal display changes from OFF to ON or the "Electric Load Feedback Val" increases, it probably is a malfunction due to a change in electrical load. Check the generator and ECM.
      

   HINT:

   1. The normal value for the ISC learning amount is engine displacement (liters) x 0.9.
      
   2. Even if the results are normal, the electrical load signal system and/or the CVT system may have been malfunctioning. Continue this inspection procedure until step 51, and if there are no problems with other parts, inspect the electrical load system and/or the CVT system (refer to step 59).
      

B	CHECK CVT SYSTEM
C	Go to step 51

A
CHECK GENERATOR CIRCUIT (Click here)

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
   Electrical Load Signal Electric Load Feedback Val
   Electrical Load Signal display changes from OFF to ON*1, or Value displayed for Electric Load Feedback Val increases*1	Electrical load signal circuit	A
   Electrical Load Signal display does not change from OFF, or Value displayed for Electric Load Feedback Val does not increase	-	B

   HINT:

   1. *1: If the Electrical Load Signal display changes from OFF to ON or the "Electric Load Feedback Val" increases, it probably is a malfunction due to a change in electrical load. Check the generator and the continuity and connections between the generator and ECM.
      
   2. Even if the results are normal, the electrical load signal system may have been malfunctioning. If there are no problems with other parts, inspect the electrical load system (refer to step 59).
      

B	Go to step 59

A
CHECK GENERATOR CIRCUIT (Click here)

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 for DTC P1605		Suspected Area	Proceed to
   P position or N position	Park/Neutral position switch
   At least 1 of the 5 sets of freeze frame data is OFF	In D or R, NSW is ON	Neutral start switch system	A
   	In D or R, NSW is OFF	CVT system	B
   All 5 sets of freeze frame data are ON	-	-	C

   HINT:

   Even if the results are normal, the neutral start switch system and/or CVT system may have been malfunctioning. If there are no problems with other parts, inspect the neutral start switch system and/or CVT system (refer to step 59).

B	CHECK CVT SYSTEM
C	Go to step 59

A
INSPECT PARK/NEUTRAL POSITION SWITCH ASSEMBLY (Click here)

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
   Calculate Load, Throttle Sensor Position	Calculate Load decreases while Throttle Sensor Position increases	Manifold absolute pressure sensor	A
   	Calculate Load does not decrease while Throttle Sensor Position increases	-	B

B	Go to step 54

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 / 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:

Even if the results are normal, the manifold absolute pressure sensor may have been malfunctioning. Continue this inspection procedure until step 58, and if there are no problems with other parts, replace the manifold absolute pressure sensor (refer to step 59).

B	Go to step 54

A
REPLACE MANIFOLD ABSOLUTE PRESSURE SENSOR (Click here)

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.
   
3. A rapid decrease in engine speed may have been caused by a malfunction in all or multiple cylinders. (There may be an electrical malfunction in the wiring shared by all the cylinders.)
   

NG	CHECK FUEL INJECTOR 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.
   
3. A rapid decrease in engine speed may have been caused by a malfunction in all or multiple cylinders. (There may be an electrical malfunction in the wiring shared by all the cylinders.)
   

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

OK

1. Connect an 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. Check whether the fuel pump operating sound occurs when performing the Active Test on the tester.
   

   OK:

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

   Result 

   Result	Proceed to
   NG	A
   OK	B

   HINT:

   1. Jiggle the wire harness and connector to increase the likelihood of detecting malfunctions that do not always occur.
      
   2. While performing the Active Test, make sure that there is no fuel leakage from the pipes, no signs that fuel has leaked, and no fuel smell.
      
   3. If the fuel pump operating noise is abnormal, proceed to step 57.
      

B	Go to step 58

A

1. Inspect the fuel pump (Click here).
   

NG	REPLACE FUEL PUMP (Click here)

OK
CHECK FUEL PUMP CONTROL CIRCUIT (Click here)

1. Check for foreign matter such as iron particles around the fuel pump (fuel pump, fuel pump filter, 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

   HINT:

   If there is foreign matter such as iron particles on the fuel pump, fuel filter or fuel tank, remove the foreign matter.

B	Go to step 59

A
REPAIR OR REPLACE FUEL SYSTEM (Click here)

1. If the malfunction could not be identified in steps 3 to 24, replace the part which is suspected to be malfunctioning according to the step where an inspection was performed.
   
   

   Performed Step	Inspection or Part to Replace
   Step 6	Brake booster replacement
   Step 8	Manifold absolute pressure sensor replacement
   Step 9	Air fuel ratio sensor replacement
   Step 16	Engine coolant temperature sensor replacement
   Step 18	Purge VSV replacement
   Step 24	Fuel pump replacement

2. If the malfunction could not be identified in steps 25 to 34, replace the part which is suspected to be malfunctioning according to the step where an inspection was performed.
   
   

   Performed Step	Inspection or Part to Replace
   Step 26	Manifold absolute pressure sensor replacement
   Step 27	Air fuel ratio sensor replacement
   Step 34	Engine coolant temperature sensor replacement

3. If the malfunction could not be identified in steps 35 to 43, replace the part which is suspected to be malfunctioning according to the step where an inspection was performed.
   
   

   Performed Step	Inspection or Part to Replace
   Step 36, 37	Throttle body assembly replacement
   Step 39, 40	EGR valve assembly replacement
   Step 41	Knock sensor replacement

4. If the malfunction could not be identified in steps 44 to 51, inspect and repair the part which is suspected to be malfunctioning according to the step where an inspection was performed.
   
   

   Performed Step	Inspection or Part to Repair
   Step 48	A/C system inspection and repair Power steering system inspection and repair (Electrical load system inspection and repair)
   Step 49	CVT system inspection and repair Electrical load system inspection and repair
   Step 50	Electrical load system inspection and repair
   Step 51	Neutral start switch system inspection and repair CVT system inspection and repair

5. If the malfunction could not be identified in steps 52 to 58, replace the part which is suspected to be malfunctioning according to the step where an inspection was performed.
   
   

   Performed Step	Inspection or Part to Replace
   Step 53	Manifold absolute pressure sensor replacement

   HINT:

   Referring to the chart, inspect and repair or replace the part from the step where an inspection was performed.

NEXT

1. Connect the intelligent tester to the DLC3.
   

2. Turn the ignition switch to ON.
   

3. Clear the DTCs (Click here).
   

NEXT

1. Check if engine stall symptoms are present.
   

   HINT:

   If any engine stall symptoms are present, recheck for DTCs and freeze frame data and perform an inspection.

NG	REPAIR OR REPLACE MALFUNCTIONING PARTS, COMPONENT AND AREA

OK
END