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 warning buzzer sounds when the driver side door is opened while the ignition switch is ACC or off and the key is in the ignition key cylinder. The key reminder warning buzzer is activated when the main body ECU (multiplex network body ECU) sends an unlock warning switch signal and front door courtesy light switch LH signal to the combination meter.
WIRING DIAGRAM
INSPECTION PROCEDURE
HINT
Since the key reminder warning system has functions that use CAN communication, first confirm that there is no malfunction in the communication system by inspecting CAN communication in accordance with the "How to Proceed with Troubleshooting" procedures. Then, conduct the following inspection procedure.
PROCEDURE
1. READ VALUE USING TECHSTREAM (FRONT DOOR COURTESY LIGHT SWITCH)
(a) Check the Data List for proper functioning of the front door courtesy light switch Key Reminder Warning System.
Main Body
OK:
On tester screen, each item changes between ON and OFF according to above chart.
NG -- GO TO LIGHTING SYSTEM (INT) Door Courtesy Switch Circuit
OK -- Continue to next step.
2. READ VALUE USING TECHSTREAM (UNLOCK WARNING SWITCH)
(a) Check the Data List for proper functioning of the unlock warning switch Key Reminder Warning System.
Main Body
OK:
On tester screen, each item changes between ON and OFF according to above chart.
NG -- INSPECT UNLOCK WARNING SWITCH ASSEMBLY
OK -- REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) Removal
3. INSPECT UNLOCK WARNING SWITCH ASSEMBLY
(a) Remove the unlock warning switch Testing and Inspection.
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
NG -- REPLACE UNLOCK WARNING SWITCH ASSEMBLY Removal
OK -- Continue to next step.
4. CHECK HARNESS AND CONNECTOR (UNLOCK WARNING SWITCH ASSEMBLY - MAIN BODY ECU AND BODY GROUND)
(a) Disconnect the F18 unlock warning switch connector.
(b) Disconnect the F9 main body ECU connector.
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- Continue to next step.
5. CHECK COMBINATION METER ASSEMBLY (OPERATION)
(a) Temporarily replace the combination meter assembly with a new or normally functioning one How To Proceed With Troubleshooting.
(b) Check the key reminder warning system Operation Check.
OK:
The key reminder warning system functions properly.
NG -- REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) Removal
OK -- END (COMBINATION METER ASSEMBLY IS DEFECTIVE)