No Answer-Back

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

No Answer-back

DESCRIPTION

In some cases, wireless door lock control functions are normal but the hazard warning lights and / or wireless door lock buzzer answer-back function(s) is not. In such cases, the main body ECU's hazard warning lights and wireless door lock buzzer signal outputs may be malfunctioning.
NOTE: Troubleshooting should be started after confirming that the answer-back function has been switched ON.

WIRING DIAGRAM





INSPECTION PROCEDURE

PROCEDURE

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

Result:





C -- GO TO PROBLEM SYMPTOMS TABLE
B -- INSPECT WIRELESS DOOR LOCK BUZZER
A -- Continue to next step.

2. PERFORM ACTIVE TEST USING TECHSTREAM (TURN SIGNAL FLASHER RELAY)
(a) Select the ACTIVE TEST, use the Techstream to generate a control command, and then check that the hazard warning lights 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)
4. INSPECT WIRELESS DOOR LOCK BUZZER




(a) Measure the resistance between terminals 1 and 2 of the buzzer.
Standard resistance:
Approximately 1 kOhms
NOTICE:
- The buzzer circuit is built into the main body ECU, not into the buzzer itself.
- When battery voltage is directly applied to the buzzer, the buzzer does not sound.

NG -- REPLACE WIRELESS DOOR LOCK BUZZER
OK -- Continue to next step.

5. CHECK WIRE HARNESS (WIRELESS DOOR LOCK BUZZER - MAIN BODY ECU AND BODY GROUND)




(a) Disconnect the W6 buzzer connector.
(b) Disconnect the B6 ECU connector.
(c) Measure the resistance of the wire harness side connectors.
Standard resistance:






NG -- REPAIR OR REPLACE HARNESS AND CONNECTOR
OK -- REPLACE DRIVER SIDE JUNCTION BLOCK ASSEMBLY (MAIN BODY ECU)