Keyless/Power Door Locks/Security System
Symptom TroubleshootingPower Door Locks/Keyless
1. If the door lock system works properly, but the keyless operation does not, refer to the immobilizer-keyless control unit symptom troubleshooting information. Symptom Troubleshooting Information
NOTE: The door lock system does not function when:
- Any of the doors is open.
- Ignition key is in the ignition key switch.
- Ignition switch is ON (II).
Keyless operation does not work (LOCK, UNLOCK, PANIC)
NOTE:
- Before troubleshooting, check the B-CAN DTCs. If any DTC is indicated, troubleshoot the indicated DTC first.
- Before troubleshooting, do the keyless transmitter test.
1. Turn the ignition switch ON (II).
2. Try to start the engine.
Does the engine start?
YES - The immobilizer system is OK, go to step 3.
NO - Go to the immobilizer symptom troubleshooting.
3. Turn the ignition switch OFF.
4. Connect the HDS to the data link connector.
5. Close all doors, then turn the ignition switch ON (II).
6. Enter the BODY ELECTRICAL menu, and check the door switch parameters.
Do all door switches indicate OFF?
YES - Go to step 6.
NO - Faulty door switch, or shorted door switch wire. Repair as necessary.
7. Remove the ignition key from the ignition switch.
8. Disconnect the immobilizer-keyless control unit 7P connector.
9. Check for voltage between the immobilizer-keyless control unit 7P connector No. 1 terminal and body ground.
Is there battery voltage?
YES - Go to step 10.
NO - Check the No. 23 (10 A) fuse in the under-hood fuse/relay box. If the fuse is blown, replace the fuse and repair a short to ground in the wire. If the fuse is OK, repair an open in the wire.
10. Disconnect the ignition key switch 6P connector.
11. At the ignition key switch side, check for continuity between the ignition key switch 6P connector No. 1 and No. 2 terminals.
Is there continuity?
YES - Faulty ignition key switch or short to ground, replace the steering lock assembly.
NO - Go to step 12.
12. Insert the ignition key into the ignition switch.
13. At the ignition key switch side, check for continuity between the ignition key switch 6P connector No. 1 and No. 2 terminals.
Is there continuity?
YES - Go to step 14.
NO - Faulty ignition key switch, replace the steering lock assembly.
14. Check for continuity between the immobilizer-keyless control unit 7P connector No. 6 terminal and the ignition key switch 6P connector No. 1 terminal.
Is there continuity?
YES - Go to step 15.
NO - Repair an open in the wire.
15. Check for continuity between the immobilizer-keyless control unit 7P connector No. 6 terminal and body ground.
Is there continuity?
YES - Repair a short to ground in the wire.
NO - Replace the immobilizer-keyless control unit.
Doors will not unlock (or lock) with the transmitter, but will unlock (or lock) with the door switch
NOTE: Before troubleshooting, check the B-CAN DTCs. If any DTC is indicated, troubleshoot the indicated DTC first.
1. Turn the ignition switch OFF.
2. Remove the ignition key from the ignition switch.
3. Close and lock the doors.
4. Try to lock/unlock the doors with the keyless transmitter.
Do the door lock actuators work normally?
YES - Intermittent failure. The system is OK at this time.
NO - Go to step 5.
5. Open the driver's door.
Does the key-in reminder chime sound?
YES - Faulty ignition key switch, or short to ground on the ignition switch PNK wire. Repair as necessary.
NO - Go to step 6.
6. Do the transmitter test.
Is the transmitter OK?
YES - Substitute a known-good MICU and recheck.
NO - Replace the transmitter.
The horn does not sound when the PANIC button on the transmitter is pressed
NOTE: Before troubleshooting, check the B-CAN DTCs. If any DTC is indicated, troubleshoot the indicated DTC first.
1. Press the PANIC button.
Does the horn sound?
YES - Go to step 3.
NO - Go to step 2.
2. Press the horn button.
Does the horn sound?
YES - Go to step 3.
NO - Check the horn circuit.
3. Turn the headlight switch ON.
Do the headlights come on?
YES - Go to step 4.
NO - Check the lighting circuit.
4. Do the transmitter test.
Is the transmitter OK?
YES - Substitute a known-good MICU and recheck.
NO - Replace the transmitter.
Doors automatically relock after being unlocked with the transmitter even though a door has been opened
1. Turn the ceiling light switch in DOOR position.
2. Turn the ignition switch ON (II).
3. Close all doors.
4. Watch the ceiling light and the door indicator on the gauge control module.
Does the ceiling light and door indicator go off?
YES - Go to step 5.
NO - Repair a short to ground in the wire between the MICU and door switch.
5. Open and close each door one at a time.
6. Watch the ceiling light and the door indicator on the gauge control module.
Does the ceiling light and door indicator come on when the door is open, and go off when the door is closed?
YES - Substitute a known-good MICU and recheck. If the symptom goes away, replace the original MICU.
NO - Repair an open in the wire between the MICU and the door switch. If the wire is OK, faulty the door switch, replace the door lock actuator assembly.