Key Reminder Buzzer Does Not Sound

DOOR LOCK: KEY REMINDER WARNING SYSTEM: Key Reminder Buzzer does not Sound

Key Reminder Buzzer does not Sound

DESCRIPTION

The key reminder buzzer sounds when the driver side door is opened while the ignition switch is OFF and the key is in the ignition key cylinder. The key reminder buzzer is activated when the multiplex network body ECU sends a key switch signal and driver side courtesy switch signal to the combination meter.

WIRING DIAGRAM





INSPECTION PROCEDURE

PROCEDURE

1. CHECK FRONT DOOR COURTESY LIGHT SWITCH ASSEMBLY (DRIVER SIDE)
(a) Move the room light switch to the DOOR position and open the driver side door. Then check that the room light turns ON.
OK:
Room light turns ON.
NG -- INSPECT FRONT DOOR COURTESY LIGHT SWITCH ASSEMBLY (DRIVER SIDE)
OK -- CHECK BUZZER (COMBINATION METER)
2. INSPECT FRONT DOOR COURTESY LIGHT SWITCH ASSEMBLY (DRIVER SIDE)





(a) Remove the courtesy light switch.
(b) Measure the resistance of the switch.
Resistance:





NG -- REPLACE FRONT DOOR COURTESY LIGHT SWITCH ASSEMBLY (DRIVER SIDE)
OK -- Continue to next step.
3. CHECK WIRE HARNESS (COURTESY LIGHT SWITCH LH - MULTIPLEX NETWORK BODY ECU)





(a) Disconnect the D5 switch connector.
(b) Disconnect the B8 ECU connector.
(c) Measure the resistance of the wire harness side connectors.
Resistance:





NG -- REPAIR OR REPLACE HARNESS AND CONNECTOR
OK -- Continue to next step.
4. CHECK BUZZER (COMBINATION METER)
(a) Check that the buzzer built into the combination meter sound (Warning Buzzer Does Not Sound).
OK:
Buzzer sounds.
NG -- REPLACE COMBINATION METER ASSEMBLY
OK -- Continue to next step.
5. INSPECT UNLOCK WARNING SWITCH ASSEMBLY





(a) Remove the unlock warning switch.
(b) Measure the resistance of the switch.
Resistance:





NG -- REPLACE UNLOCK WARNING SWITCH ASSEMBLY
OK -- Continue to next step.
6. CHECK WIRE HARNESS (UNLOCK WARNING SWITCH - MPX BODY ECU AND BODY GROUND)





(a) Disconnect the U1 switch connector.
(b) Disconnect the B6 ECU connector.
(c) Measure the resistance of the wire harness side connectors.
Resistance:





NG -- REPAIR OR REPLACE HARNESS AND CONNECTOR
OK -- REPLACE INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY (MULTIPLEX NETWORK BODY ECU)