Rear Door LH Entry Lock and Unlock Functions do not Operate

DOOR LOCK: SMART ACCESS SYSTEM WITH PUSH-BUTTON START: Rear Door LH Entry Lock and Unlock Functions do not Operate
- Rear Door LH Entry Lock and Unlock Functions do not Operate

DESCRIPTION

When the rear door LH entry lock and unlock functions do not operate, one of the following may be malfunctioning: 1) power door lock system, 2) rear door LH electrical key oscillator, or 3) certification ECU.

WIRING DIAGRAM





INSPECTION PROCEDURE

PROCEDURE

1. CHECK POWER DOOR LOCK OPERATION

(a) When the master switch assembly's door control switch is operated, check that the locked doors unlock.

Result





NG -- GO TO POWER DOOR LOCK CONTROL SYSTEM Service Precautions
OK -- Continue to next step.

2. READ VALUE USING TECHSTREAM (DOOR LOCK POSITION SWITCH)

(a) Using the Techstream, read the Data List.

Rear Left Door (Rear door ECU LH)





OK:

On the screen, item changes between ON and OFF according to above chart.

NG -- GO TO POWER DOOR LOCK CONTROL SYSTEM (Proceed to Only Rear Door LH LOCK/UNLOCK Functions do not Operate) Problem Symptoms Table
OK -- Continue to next step.

3. READ VALUE USING TECHSTREAM

(a) Using the Techstream, read the Data List.

Rear Left Door (Rear door ECU LH)





Result





B -- CHECK WAVE ENVIRONMENT
A -- Continue to next step.

4. CHECK REAR DOOR ECU LH





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

Standard voltage:





NG -- REPLACE REAR DOOR ECU LH Components
OK -- Continue to next step.

5. CHECK HARNESS AND CONNECTOR (DOOR ELECTRICAL KEY OSCILLATOR - REAR DOOR ECU LH)





(a) Disconnect the d2 oscillator connector.

(b) Disconnect the O14 ECU connector.

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

Standard resistance:





NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- Continue to next step.

6. CHECK HARNESS AND CONNECTOR (DOOR ELECTRICAL KEY OSCILLATOR - REAR DOOR OUTSIDE HANDLE LH)





(a) Disconnect the d2 oscillator connector.

(b) Disconnect the d1 handle connector.

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

Standard resistance:





NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- Continue to next step.

7. CHECK HARNESS AND CONNECTOR (REAR DOOR ECU LH - REAR DOOR OUTSIDE HANDLE LH)





(a) Disconnect the O14 ECU connector.

(b) Disconnect the d1 handle connector.

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

Standard resistance:





NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- Continue to next step.

8. CHECK DOOR ELECTRICAL KEY OSCILLATOR (OPERATION)

(a) Replace the door electrical key oscillator with a new one or normally functioning one Components.

(b) Check that the entry function operates normally.

OK:

Operates normally

NG -- CHECK REAR DOOR OUTSIDE HANDLE LH (OPERATION)

OK -- END (DOOR ELECTRICAL KEY OSCILLATOR IS DEFECTIVE)

9. CHECK REAR DOOR OUTSIDE HANDLE LH (OPERATION)

(a) Replace the rear door outside handle LH with a new one or normally functioning one Removal.

(b) Check that the entry function operates normally.

OK:

Operates normally

NG -- REPLACE REAR DOOR ECU LH Components

OK -- END (REAR DOOR OUTSIDE HANDLE LH IS DEFECTIVE)

10. CHECK WAVE ENVIRONMENT

(a) Bring the electrical key transmitter near the rear left door outside handle, and perform a rear left door entry lock and unlock operation check.





NOTICE:
If the key is brought within 0.2 m (0.6 ft) of the door handle, communication is not possible.

HINT
* When the electrical key transmitter is brought near the rear left passenger door outside handle, the possibility of wave interference decreases, and it can be determined if wave interference is causing the problem symptom.
* If the inspection result is that the operation check 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.

Result





B -- AFFECTED BY WAVE INTERFERENCE
A -- Continue to next step.

11. KEY DIAGNOSTIC MODE

(a) Diagnostic mode inspection (rear door LH outside oscillator)





(1) Connect the Techstream to the DLC3.

(2) Turn the engine switch on (IG).

(3) Turn the Techstream on.

(4) Enter the following menus: Body Electrical / Smart Access / Smart Communication Check /Overhead + Passenger Side Rear.

(5) When the electrical key transmitter is in the position shown in the illustration, check that the wireless door lock buzzer sounds.

HINT
If the buzzer sounds, it can be determined that the rear left seat outside transmitter is operating normally.

OK:

Wireless door lock buzzer sounds

NG -- CHECK HARNESS AND CONNECTOR (DOOR ELECTRICAL KEY OSCILLATOR - CERTIFICATION ECU)

OK -- END (CERTIFICATION ECU IS DEFECTIVE)

12. CHECK HARNESS AND CONNECTOR (DOOR ELECTRICAL KEY OSCILLATOR - CERTIFICATION ECU)





(a) Disconnect the d2 oscillator connector.

(b) Disconnect the L16 ECU connector.

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

Standard resistance:





NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- Continue to next step.

13. CHECK HARNESS AND CONNECTOR (DOOR ELECTRICAL KEY OSCILLATOR - REAR DOOR ECU LH)





(a) Disconnect the O14 ECU connector.

(b) Disconnect the d2 oscillator connector.

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

Standard resistance:





NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- Continue to next step.

14. CHECK HARNESS AND CONNECTOR (DOOR ELECTRICAL KEY OSCILLATOR - REAR DOOR OUTSIDE HANDLE LH)





(a) Disconnect the d2 oscillator connector.

(b) Disconnect the d1 handle connector.

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

Standard resistance:





NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- Continue to next step.

15. CHECK DOOR ELECTRICAL KEY OSCILLATOR (OPERATION)

(a) Replace the door electrical key oscillator with a new one or normally functioning one Components.

(b) Check that the entry function operates normally.

OK:

Operates normally

NG -- CHECK REAR DOOR OUTSIDE HANDLE LH (OPERATION)

OK -- END (DOOR ELECTRICAL KEY OSCILLATOR IS DEFECTIVE)

16. CHECK REAR DOOR OUTSIDE HANDLE LH (OPERATION)

(a) Replace the rear door outside handle LH with a new one or normally functioning one Removal.

(b) Check that the entry function operates normally.

OK:

Operates normally

NG -- CHECK REAR DOOR ECU LH (OPERATION)

OK -- END (REAR DOOR OUTSIDE HANDLE LH IS DEFECTIVE)

17. CHECK REAR DOOR ECU LH (OPERATION)

(a) Replace the rear door ECU LH with a new one or normally functioning one Components.

(b) Check that the entry function operates normally.

OK:

Operates normally

NG -- REPLACE CERTIFICATION ECU

OK -- END (REAR DOOR ECU LH IS DEFECTIVE)