No Answer-Back (Hazard Warning Light and Wireless Door Lock Buzzer)

DOOR LOCK: WIRELESS DOOR LOCK CONTROL SYSTEM: No Answer-Back (Hazard Warning Light and Wireless Door Lock Buzzer)

No Answer-Back (Hazard Warning Light and Wireless Door Lock Buzzer)

DESCRIPTION

If there is no answer-back of the hazard warning lights and wireless door lock buzzer while the wireless control function is operating normally, the hazard light signal and the wireless door lock buzzer signal output from the multiplex network body ECU may be malfunctioning.
NOTE: Confirm that the answer-back function has been switched on as a result of customization before starting troubleshooting.

WIRING DIAGRAM





INSPECTION PROCEDURE

PROCEDURE

1. CHECK WIRELESS DOOR LOCK FUNCTION
(a) Check that the wireless door lock functions operate when the transmitter is used Component Tests and General Diagnostics.
Result:






C -- GO TO FLOW CHART
B -- PERFORM ACTIVE TEST BY TECHSTREAM (WIRELESS DOOR LOCK BUZZER)
A -- Continue to next step.
2. PERFORM ACTIVE TEST BY TECHSTREAM (HAZARD WARNING LIGHT)
(a) Connect the Techstream to the DLC3.
(b) Turn the ignition switch to the ON position and turn the Techstream main switch on.
(c) Select the ACTIVE TEST mode on the Techstream.

Main Body:





(d) Check that "ON" and "OFF" of the hazard warning lights on the headlight and rear combination light turn on and off when the Techstream is used.
OK:
The hazard warning lights turn on or off in accordance with commands of the Techstream.
NG -- CHECK HAZARD WARNING LIGHT
OK -- REPLACE INSTRUMENT PANEL JUNCTION BLOCK
3. CHECK HAZARD WARNING LIGHT
(a) Check that the hazard warning lights flash continuously when the hazard warning light switch is pressed.
OK:
Hazard warning lights flash continuously.
NG -- INSPECT LIGHTING SYSTEM
OK -- REPLACE INSTRUMENT PANEL JUNCTION BLOCK
4. PERFORM ACTIVE TEST BY TECHSTREAM (WIRELESS DOOR LOCK BUZZER)
(a) Connect the Techstream to the DLC3.
(b) Turn the ignition switch to the ON position and turn the Techstream main switch on.
(c) Select the ACTIVE TEST mode on the Techstream.

Main Body:





(d) Check that the buzzer sounds/stops when turning the wireless door lock buzzer on/off by using the Techstream.
Result:






B -- INSPECT WIRELESS DOOR LOCK BUZZER
A -- REPLACE INSTRUMENT PANEL JUNCTION BLOCK
5. INSPECT WIRELESS DOOR LOCK BUZZER





(a) Disconnect the wireless door lock buzzer connector.
(b) Measure the resistance according to the value(s) in the table below.
HINT: The buzzer circuit is built into the ECU, not into the buzzer itself. When battery voltage is applied directly to the buzzer, the buzzer does not sound.

Resistance:






NG -- REPLACE WIRELESS DOOR LOCK BUZZER
OK -- Continue to next step.
6. CHECK HARNESS AND CONNECTOR (MULTIPLEX NETWORK BODY ECU TO WIRELESS DOOR LOCK BUZZER)





(a) Disconnect the multiplex network body ECU (B7) connector.
(b) Measure the resistance according to the value(s) in the table below.
Resistance:






NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- REPLACE INSTRUMENT PANEL JUNCTION BLOCK