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 wireless door lock buzzer are not. Malfunctions may be present in the main body ECU, certification ECU, hazard warning lights, and/or wireless door lock buzzer signal outputs.

NOTICE:
* Before performing the inspection, check that there are no problems related to the CAN communication system.
* When troubleshooting a function, first make sure that the answer-back function is set to the default setting.
* Check that DTC B1242 is not output.

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.

Result:





C -- Go to FLOWCHART

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

2. PERFORM ACTIVE TEST USING TECHSTREAM (FLSH 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 -- CHECK HAZARD WARNING LIGHT

OK -- REPLACE INSTRUMENT PANEL JUNCTION BLOCK (MAIN BODY ECU)

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 INSTRUMENT PANEL JUNCTION BLOCK (MAIN BODY ECU)

4. 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 door lock buzzer sounds.

Smart Key:





OK:

Wireless door lock buzzer sounds.

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

OK -- REPLACE CERTIFICATION ECU

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





(a) Disconnect the A10 buzzer connector.

(b) Disconnect the E84 ECU connector.

(c) Measure the resistance of the wire harness side connectors.

Standard resistance:





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

6. CHECK WIRELESS DOOR LOCK BUZZER (OPERATION)

(a) Temporarily replace the wireless door lock buzzer with a new one.

(b) Check that the wireless door lock buzzer sounds by using the transmitter lock/unlock switch.

OK:

Wireless door lock buzzer sounds.

NG -- REPLACE CERTIFICATION ECU

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