No Answer-Back

DOOR LOCK: WIRELESS DOOR LOCK CONTROL 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) do not operate. In such cases, the main body ECU's hazard warning lights and wireless door lock buzzer signal outputs may be malfunctioning.

HINT
Troubleshooting should be started after confirming that the customize status of the answer-back buzzer function has been switched ON.

WIRING DIAGRAM





INSPECTION PROCEDURE

PROCEDURE

1. CHECK WIRELESS DOOR LOCK CONTROL FUNCTIONS

(a) Check the wireless door lock control functions by operating the transmitter switch.

Result





C -- GO TO PROBLEM SYMPTOMS TABLE Problem Symptoms Table

B -- REPLACE MAIN BODY ECU
A -- Continue to next step.

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

(a) Disconnect the W3 wireless door lock buzzer connector.





(b) Disconnect the B5 main body ECU connector.

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

Standard Resistance:





(d) Reconnect the wireless door lock buzzer connector.

(e) Reconnect the main body ECU connector.

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

3. REPLACE WIRELESS DOOR LOCK BUZZER

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

(b) Check that the buzzer sounds when using the transmitter LOCK and UNLOCK switches.

OK:

buzzer sounds

NOTICE:
When battery voltage is directly applied to the buzzer, the buzzer does not sound.

HINT
The buzzer circuit is built into the main body ECU, not into the buzzer itself.

NG -- REPLACE MAIN BODY ECU

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