No Answer-Back

DOOR LOCK: WIRELESS DOOR LOCK CONTROL SYSTEM (w/o Smart Key System): No Answer-Back

No Answer-Back

DESCRIPTION

In some cases, wireless door lock control functions are normal but hazard warning light answer-back is not. In such case, the multiplex network body ECU's hazard warning light signal outputs may be malfunctioning.
NOTE: Troubleshooting should be started after confirming that the answer-back function has been switched ON.

INSPECTION PROCEDURE

PROCEDURE

1. CHECK WIRELESS DOOR LOCK CONTROL FUNCTION
(a) Check the wireless door lock control functions by operating the transmitter switch.

Result:





B -- GO TO PROBLEM SYMPTOMS TABLE
A -- Continue to next step.

2. PERFORM ACTIVE TEST USING TECHSTREAM (TURN SIGNAL FLASHER RELAY)
(a) Select ACTIVE TEST, use the Techstream to generate a control command, and then check that the hazard waning light flash.

Main body ECU:





OK:
Turn signal flasher relay turns ON / OFF.
OK -- REPLACE DRIVER SIDE JUNCTION BLOCK ASSEMBLY (MAIN BODY ECU)
NG -- Continue to next step.

3. CHECK HAZARD WARNING LIGHT
(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
OK -- REPLACE DRIVER SIDE JUNCTION BLOCK ASSEMBLY (MAIN BODY ECU)