Drivers Door Key Cylinder Switch Circuit Troubleshooting

Keyless/Power Door Locks/Security System Symptom Troubleshooting - Driver's door key cylinder switch circuit troubleshooting

Driver's door key cylinder switch circuit troubleshooting

NOTE: Before troubleshooting, check the B-CAN DTCs.
If any DTC is indicated, refer to the B-CAN System Diagnosis Test Mode A Troubleshooting - B-CAN System Diagnosis Test Mode A, and troubleshoot the indicated DTCs first.

1. Turn the ignition switch to ON (II), or press the engine start/stop button to select the ON mode.

2. Disconnect the driver's door latch 10P connector.

3. Connect driver's door latch 10P connector terminal No. 9 and body ground with a jumper wire.





4. Select SECURITY with the HDS, and enter the DATA LIST.

5. Check the ON/OFF information of the DRIVER'S DOOR KEY CYLINDER SWITCH (LOCK) in the DATA LIST.

Is information indicator ON?

YES -

Go to step 6.

NO -

Go to step 8.

6. Test the driver's door key cylinder switch Door Key Cylinder Switch Test.

Is the switch OK?

YES -

Go to step 7.

NO -

Faulty driver's door key cylinder switch; replace the driver's door latch Service and Repair.

7. Check for continuity between driver's door latch 10P connector terminal No. 5 and body ground.





Is there continuity?

YES -

Faulty door multiplex control unit; replace the power window master switch Power Window Master Switch Replacement.

NO -

Repair an open or high resistance in the wire or poor ground (G401).

8. Connect power window master switch 37P connector terminal No. 28 and body ground with a jumper wire.





9. Check the ON/OFF information of the DRIVER'S DOOR KEY CYLINDER SWITCH (LOCK) in the DATA LIST.

Is information indicator ON?

YES -

Repair an open or high resistance in the wire.

NO -

Faulty door multiplex control unit; replace the power window master switch Power Window Master Switch Replacement.