ENTRY AND START SYSTEM (for Entry Function) > Room Oscillator does not Recognize Key

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DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

NOTICE:

1. The entry and start system (for entry function) uses a multiplex communication system (LIN communication system) and CAN communication system. Inspect the communication function by following How to Proceed with Troubleshooting (Click here). Troubleshoot the entry and start system (for entry function) after confirming that the communication system is functioning properly.
   
2. When using the intelligent tester with the engine switch off to troubleshoot: Connect the intelligent tester to the DLC3, and turn a courtesy light switch on and off at 1.5-second intervals until communication between the tester and vehicle begins.
   

1. Remove the battery of the electrical key transmitter (Click here).
   

2. With the brake pedal depressed (for Continuously Variable Transaxle) or clutch pedal depressed (for Manual Transaxle), hold the key close to the engine switch of the engine switch while facing the logo side of the key to the engine switch.
   

3. When operating the engine switch, check whether the power source mode changes.
   

   OK:

   Power source mode changes.
   

   HINT:

   1. When the electrical key transmitter cannot be verified even though it is within the specified range, the engine start check can be performed by removing the transmitter battery from the electrical key transmitter and holding the transmitter close to the engine switch.
      
   2. When performing the check, if the power source mode changes, there is a problem with key certification inside the cabin.
      

B	Go to step 4

A

1. Disconnect the power management control ECU or power source control ECU connector.
   

   
   
   
   
   

   Text in Illustration 

   *1	Front view of wire harness connector (to Power Management Control ECU)	*4	For 1KR-FE and 1NR-FE
   *2	Front view of wire harness connector (to Power Source Control ECU)	*5	For 1ND-TV
   *3	Front view of wire harness connector (to Engine Switch)	-	-

2. Disconnect the engine switch connector.
   

3. Measure the resistance according to the value(s) in the table below.
   

   Standard Resistance:

   Tester Connection	Condition	Specified Condition
   D27-7 (SS1) - D38-18 (SSW1)*1	Always	Below 1 Ω
   D27-7 (SS1) - D73-18 (SSW1)*2	Always	Below 1 Ω
   D27-2 (SS2) - D38-17 (SSW2)*1	Always	Below 1 Ω
   D27-2 (SS2) - D73-17 (SSW2)*2	Always	Below 1 Ω
   D27-7 (SS1) - Body ground	Always	10 kΩ or higher
   D27-2 (SS2) - Body ground	Always	10 kΩ or higher

   1. *1: for 1KR-FE and 1NR-FE
      
   2. *1: for 1ND-TV
      

NG	REPAIR OR REPLACE HARNESS OR CONNECTOR

OK

1. Reconnect the engine switch connector.
   

2. Measure the resistance according to the value(s) in the table below.
   

   Standard Resistance:

   Tester Connection	Switch Condition	Specified Condition
   7 (SS1) - 5 (GND)	Engine switch pushed	Below 1 Ω
   	Engine switch not pushed	10 kΩ or higher
   2 (SS2) - 5 (GND)	Engine switch pushed	Below 1 Ω
   	Engine switch not pushed	10 kΩ or higher
   5 (GND) - Body ground	Always	Below 1 Ω

   Text in Illustration 

   *1	Component with harness connected (Engine Switch)

   Result 

   Result	Proceed to
   NG	A
   OK (for 1KR-FE and 1NR-FE)	B
   OK (for 1ND-TV)	C

B	REPLACE POWER MANAGEMENT CONTROL ECU (Click here)
C	REPLACE POWER SOURCE CONTROL ECU (Click here)

A
REPLACE ENGINE SWITCH (Click here)

1. Install the battery to the electrical key transmitter (Click here).
   

2. Bring the electrical key transmitter near the indoor electrical key oscillator (front side), and check that the engine can be started.
   

   NOTICE:

   If the key is brought within 0.2 m (0.656 ft.) of the indoor electrical key oscillator (for front floor), communication is not possible.

3. Bring the electrical key transmitter near the indoor electrical key oscillator (inside luggage), and check that the engine can be started*.
   *: If the customize setting for Ignition Available Area is not set to ALL, the engine will not start. Before performing this inspection, check that ALL has been selected (Click here).
   

   NOTICE:

   If the key is brought within 0.2 m (0.656 ft.) of the indoor electrical key oscillator (for rear floor), communication is not possible.

   HINT:

   1. When the electrical key transmitter is brought near the indoor electrical key oscillator, the possibility of wave interference decreases, and it can be determined if wave interference is causing the problem symptom.
      
   2. If the operation is normal, the possibility of wave interference is high. Also, added vehicle components may cause wave interference. If installed, remove them and perform the operation check.
      

   OK:

   The engine starts.
   

NG	Go to step 5

OK
AFFECTED BY WAVE INTERFERENCE

1. Diagnostic mode inspection (indoor electrical key oscillator (front side))
   

   1. Connect the intelligent tester to the DLC3.
      

   2. Turn the engine switch on (IG).
      

   3. Turn the intelligent tester on.
      

   4. Enter the following menus: Body / Entry & Start / Key Communication Check / Overhead + Front Room.
      

   5. When the electrical key transmitter is placed on the driver seat or front passenger seat cushion, check that the wireless door lock buzzer sounds.
      

2. Diagnostic mode inspection (indoor electrical key oscillator (rear side))
   

   1. Connect the intelligent tester to the DLC3.
      

   2. Turn the engine switch on (IG).
      

   3. Turn the intelligent tester on.
      

   4. Enter the following menus: Body / Entry & Start / Key Communication Check / Overhead + Back Door (inside).
      

   5. When the electrical key transmitter is held at the same height as the rear bumper upper surface and aligned with the center of the rear of the vehicle, check that the wireless door lock buzzer sounds.
      

      HINT:

      If the buzzer sounds, it can be determined that the indoor electrical key oscillators are operating normally.

      Result 

      Result	Proceed to
      Front side operation fails	A
      Inside luggage operation fails	B
      Front side and inside luggage operations are normal	C
      Front side and rear side operations fail	D

B	Go to step 10
C	Go to step 14
D	REPLACE CERTIFICATION ECU

A

1. Disconnect the certification ECU connector.
   

2. Disconnect the indoor electrical key oscillator (front side) connector.
   

3. Measure the resistance according to the value(s) in the table below.
   

   Standard Resistance:

   Tester Connection	Condition	Specified Condition
   D34-7 (CLG5) - D32-1 (CLG3)	Always	Below 1 Ω
   D34-8 (CG5B) - D32-3 (CLGB)	Always	Below 1 Ω
   D34-7 (CLG5) - Body ground	Always	10 kΩ or higher
   D34-8 (CG5B) - Body ground	Always	10 kΩ or higher

NG	REPAIR OR REPLACE HARNESS OR CONNECTOR

OK

1. Reconnect the certification ECU connector.
   

2. Using an oscilloscope, check that waveform.
   

   OK (Reference):

   Tester Connection	Tool Setting	Switch Condition	Specified Condition
   D32-1 (CLG3) - D32-3 (CLGB)	2 V/DIV, 2 μs/DIV. (Reference)	Engine switch on (IG)	Pulse generation

NG	REPLACE CERTIFICATION ECU

OK

1. Temporarily replace the indoor electrical key oscillator (front side) with a new or normally functioning one (Click here).
   

NEXT

1. Check that the engine switch indicator is illuminated in green, push the engine switch, and check that the engine starts.
   

OK:

Engine can be started.

NG	REPLACE CERTIFICATION ECU

OK
END (INDOOR ELECTRICAL KEY OSCILLATOR IS DEFECTIVE)

1. Disconnect the certification ECU connector.
   

2. Disconnect the indoor electrical key oscillator (rear side) connector.
   

3. Measure the resistance according to the value(s) in the table below.
   

   Standard Resistance:

   Tester Connection	Condition	Specified Condition
   D34-26 (CLG7) - G33-1 (CLG6)	Always	Below 1 Ω
   D34-27 (CG7B) - G33-3 (CLGB)	Always	Below 1 Ω
   D34-26 (CLG7) - Body ground	Always	10 kΩ or higher
   D34-27 (CG7B) - Body ground	Always	10 kΩ or higher

NG	REPAIR OR REPLACE HARNESS OR CONNECTOR

OK

1. Reconnect the certification ECU connector.
   

2. Using an oscilloscope, check the waveform.
   

   OK (Reference):

   Tester Connection	Tool Setting	Switch Condition	Specified Condition
   G33-1 (CLG6) - G33-3 (CLGB)	2 V/DIV, 2 μs/DIV. (Reference)	Engine switch on (IG)	Pulse generation

NG	REPLACE CERTIFICATION ECU

OK

NEXT

1. Check that the engine switch indicator is illuminated in green, push the engine switch, and check that the engine starts.
   

OK:

Engine can be started.

NG	REPLACE CERTIFICATION ECU

OK
END (INDOOR ELECTRICAL KEY OSCILLATOR IS DEFECTIVE)

1. Check that the transmitter LED illuminates each time when the switch is pressed 3 times.
   

   Result 

   Result	Proceed to
   Transmitter LED does not illuminate at all when switch is pressed 3 times	A
   Transmitter LED illuminates each time when switch is pressed 3 times	B
   Transmitter LED does not illuminate the second or third time	C

   HINT:

   If the transmitter LED does not illuminate the second or third time, the battery is depleted.

B	REPLACE ELECTRICAL KEY TRANSMITTER
C	REPLACE TRANSMITTER BATTERY (Click here)

A

1. Remove the battery from the electrical key transmitter that does not operate. Attach a lead wire (0.6 mm (0.0236 in.) or less in diameter including wire sheath) with tape or equivalent to the negative (-) terminal (Click here).
   

   NOTICE:

   Do not wrap a lead wire around the terminal, wedge it between the terminals, or solder it. Terminal may be deformed or damaged, and the battery will not be able to be installed correctly.

2. Carefully pull the lead wire out from the position shown in the illustration and install the previously removed transmitter battery.
   

3. Using an oscilloscope, check the transmitter battery voltage waveform.
   

   HINT:

   When measuring the battery voltage, while operating the lock switch of a door outside handle assembly, bring the electrical key transmitter within the entry operating range to perform the measurement. For the entry operating range, refer to System Description (Click here).

   Standard Voltage:

   Item	Content
   Tester Connection	Battery positive (+) - Battery negative (-)
   Tool Setting	0.5 V/DIV., 100 ms/DIV.
   Condition	Engine switch off, all doors closed and lock switch pushed
   Specified Condition	2.2 to 3.2 V (Refer to the waveform)

NG	REPLACE TRANSMITTER BATTERY (Click here)

OK

1. Check if there is another registered transmitter available.
   

   Result 

   Result	Proceed to
   Another registered transmitter is not available	A
   Another registered transmitter is available	B

B	Go to step 19

A

1. Replace the electrical key transmitter.
   

NEXT

1. Register the electrical key transmitter.
   

NEXT

1. Check that the engine switch indicator is illuminated in green, push the engine switch, and check that the engine starts.
   

   OK:

   Engine can be started.
   

NG	REPLACE CERTIFICATION ECU

OK
END (ELECTRICAL KEY TRANSMITTER IS DEFECTIVE)