No Answer-Back

DOOR LOCK: WIRELESS DOOR LOCK CONTROL SYSTEM: No Answer-Back
- No Answer-Back

DESCRIPTION

In some cases, the wireless door lock control functions are normal but the hazard warning light and/or wireless door lock buzzer answer-back function does not operate. In such cases, hazard warning light and wireless door lock buzzer signal outputs from the main body ECU (multiplex network body ECU) or certification ECU may be malfunctioning.

WIRING DIAGRAM





INSPECTION PROCEDURE

NOTICE:
* Start troubleshooting after confirming that the customize status of the answer-back function has been switched on.
* Before performing the inspection, check that there are no problems related to the CAN communication system.
* Before replacing the certification ECU, refer to the engine immobiliser system Engine Immobilizer System.

PROCEDURE

1. CHECK WIRELESS ANSWER-BACK OPERATION

(a) Check the wireless answer-back operation using the wireless door lock control function.

Result





B -- PERFORM ACTIVE TEST USING TECHSTREAM (WIRELESS DOOR LOCK BUZZER)
A -- Continue to next step.

2. CHECK HAZARD WARNING LIGHT OPERATION

(a) Check that the hazard warning lights flash continuously when the hazard warning signal switch is pressed.

OK:

Hazard warning lights flash continuously.

NG -- GO TO LIGHTING SYSTEM How To Proceed With Troubleshooting
OK -- Continue to next step.

3. PERFORM ACTIVE TEST USING TECHSTREAM (HAZARD WARNING LIGHT)

(a) Operate the Techstream according to the display and select Active Test Scan Tool Testing and Procedures.

Main Body





OK:

The hazard warning lights can be turned on and off using the Techstream.

NG -- CHECK HARNESS AND CONNECTOR (TURN SIGNAL FLASHER - MAIN BODY ECU)

OK -- REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) Removal

4. CHECK HARNESS AND CONNECTOR (TURN SIGNAL FLASHER - MAIN BODY ECU)

(a) Disconnect the G58 flasher connector.

(b) Disconnect the G47 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 -- REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) Removal

5. PERFORM ACTIVE TEST USING TECHSTREAM (WIRELESS DOOR LOCK BUZZER)

(a) Operate the Techstream according to the display and select Active Test Scan Tool Testing and Procedures.

Main Body





OK:

The wireless door lock buzzer can be turned on and off using the Techstream.

NG -- CHECK HARNESS AND CONNECTOR (WIRELESS DOOR LOCK BUZZER - MAIN BODY ECU)
OK -- Continue to next step.

6. REPLACE CERTIFICATION ECU

(a) Temporarily replace the certification ECU with a new one Removal.

NEXT -- Continue to next step.

7. CHECK WIRELESS DOOR LOCK BUZZER OPERATION

(a) Check that the wireless door lock buzzer sounds by operating the wireless door lock function.

OK:

Wireless door lock buzzer sounds.

NG -- REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) Removal

OK -- END (CERTIFICATION ECU IS DEFECTIVE)

8. CHECK HARNESS AND CONNECTOR (WIRELESS DOOR LOCK BUZZER - MAIN BODY ECU)

(a) Disconnect the A33 buzzer connector.

(b) Remove the main body ECU (multiplex network body ECU) Removal.

(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.

9. REPLACE WIRELESS DOOR LOCK BUZZER

(a) Temporarily replace the wireless door lock buzzer with a new or normally functioning one Removal.

NEXT -- Continue to next step.

10. CHECK WIRELESS DOOR LOCK BUZZER OPERATION

(a) Check that the wireless door lock buzzer sounds by operating the wireless door lock function.

OK:

Wireless door lock buzzer sounds.

NG -- REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) Removal

OK -- END (WIRELESS DOOR LOCK BUZZER IS DEFECTIVE)