DESCRIPTION
WIRING DIAGRAM
INSPECTION PROCEDURE
READ VALUE USING INTELLIGENT TESTER (FRONT DOOR COURTESY LIGHT SWITCH)
READ VALUE USING INTELLIGENT TESTER (UNLOCK WARNING SWITCH)
INSPECT UNLOCK WARNING SWITCH ASSEMBLY
CHECK HARNESS AND CONNECTOR (UNLOCK WARNING SWITCH ASSEMBLY - MAIN BODY ECU AND BODY GROUND)
CHECK COMBINATION METER ASSEMBLY (OPERATION)
KEY REMINDER WARNING SYSTEM - 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 sends an unlock warning switch signal and front door courtesy light switch LH*1 or RH*2 signal to the combination meter.
WIRING DIAGRAM
INSPECTION PROCEDURE
- 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.
| 1.READ VALUE USING INTELLIGENT TESTER (FRONT DOOR COURTESY LIGHT SWITCH) |
Check the Data List for proper functioning of the front door courtesy light switch ().
Main Body| Tester Display | Measurement Item/Range | Normal Condition | Diagnostic Note |
| D Door Courtesy SW |
Driver side door courtesy light switch signal / ON or OFF |
ON: Driver side door opened
OFF: Driver side door closed | - |
| 2.READ VALUE USING INTELLIGENT TESTER (UNLOCK WARNING SWITCH) |
Check the Data List for proper functioning of the unlock warning switch ().
Main Body| Tester Display | Measurement Item/Range | Normal Condition | Diagnostic Note |
| Key Unlock Warning SW | Unlock warning switch signal / ON or OFF | ON: Key in ignition key cylinder
OFF: No key in ignition key cylinder | - |
- OK:
- On tester screen, item changes between ON and OFF according to above chart.
| OK | |
| |
| REPLACE MAIN BODY ECU (COWL SIDE JUNCTION BLOCK LH) |
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| 3.INSPECT UNLOCK WARNING SWITCH ASSEMBLY |
Remove the unlock warning switch ().
Measure the resistance according to the value(s) in the table below.
- Standard Resistance:
| Tester Connection | Switch Condition | Specified Condition |
| 1 (UN+) - 2 (UN-) | Not pushed | 10 kΩ or higher |
| Pushed | Below 1 Ω |
| | REPLACE UNLOCK WARNING SWITCH ASSEMBLY ()
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| 4.CHECK HARNESS AND CONNECTOR (UNLOCK WARNING SWITCH ASSEMBLY - MAIN BODY ECU AND BODY GROUND) |
Disconnect the E94 unlock warning switch connector.
Disconnect the E4 main body ECU connector.
Measure the resistance according to the value(s) in the table below.
- Standard Resistance:
| Tester Connection | Condition | Specified Condition |
| E94-1 (UN+) - E4-5 (KSW) | Always | Below 1 Ω |
| E94-2 (UN-) - Body ground | Always | Below 1 Ω |
| E94-1 (UN+) - Body ground | Always | 10 kΩ or higher |
| | REPAIR OR REPLACE HARNESS OR CONNECTOR |
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| 5.CHECK COMBINATION METER ASSEMBLY (OPERATION) |
Temporarily replace the combination meter assembly with a new or normally functioning one ().
Check the key reminder warning system ().
- OK:
- The key reminder warning system functions properly.
| | REPLACE MAIN BODY ECU (COWL SIDE JUNCTION BLOCK LH) |
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| OK | |
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| END (COMBINATION METER ASSEMBLY IS DEFECTIVE) |
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