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 the answer-back buzzer does not sound even though the wireless door lock functions are possible and each wireless door lock buzzer circuit is operating normally, the theft warning ECU's (theft warning ECU's) wireless door lock buzzer controller outputs may be abnormal.

WIRING DIAGRAM





INSPECTION PROCEDURE

PROCEDURE

1. CHECK WIRELESS DOOR LOCK CONTROL FUNCTIONS
(a) Check the wireless door lock functions by operating the transmitter switches.

Result:





C -- GO TO PROBLEM SYMPTOMS TABLE
B -- PERFORM ACTIVE TEST USING TECHSTREAM (WIRELESS DOOR LOCK BUZZER)
A -- Continue to next step.
2. CHECK HAZARD WARNING LIGHTS
(a) Check that the hazard warning lights flash when the hazard warning signal switch is pressed.
OK:
Hazard warning lights flash.
NG -- GO TO LIGHTING SYSTEM
OK -- Continue to next step.
3. PERFORM ACTIVE TEST USING TECHSTREAM (WIRELESS DOOR LOCK BUZZER)
(a) Select the Active Test, use the Techstream to generate a control command.

Theft Deterrent:





OK:
Wireless door lock buzzer can be turned.
OK -- REPLACE THEFT WARNING ECU
NG -- Continue to next step.
4. INSPECT WIRELESS DOOR LOCK BUZZER




(a) Measure the resistance between terminals 1 and 2 of the buzzer.
Standard:
Approximately 1 kOhms
NOTICE:
- The buzzer circuit is built into the theft warning 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 (BUZZER - THEFT WARNING ECU)




(a) Disconnect the W3 buzzer connector.
(b) Disconnect the T7 ECU connector.
(c) Measure the resistance of the wire harness side connectors.
Standard resistance:






NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- REPLACE THEFT WARNING ECU