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.

NOTICE:
Troubleshooting should be started after confirming that the customize status of 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 functions by operating the transmitter switch.





C -- GO TO PROBLEM SYMPTOMS TABLE Problem Symptoms Table

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

2. PERFORM ACTIVE TEST USING TECHSTREAM (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





OK:

Hazard warning lights are turned ON/OFF.

NG -- GO TO LIGHTING SYSTEM Exterior Lighting System

OK -- REPLACE MAIN BODY ECU

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

(a) Select the Active Test, use the Techstream to generate a control command, and then check that the wireless buzzer operates normally.

Main Body





OK:

Wireless buzzer turns ON/OFF.

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

OK -- REPLACE MAIN BODY ECU

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





(a) Disconnect the A40 wireless door lock buzzer connector.

(b) Disconnect the H1 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 and main body ECU connector.

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

5. 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.

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)