Keyless/Power Door Locks/Security System Symptom Troubleshooting Index

NOTE: If the door lock system and the keyless operation do not work, troubleshoot the door locks first. The system does not function when turn the vehicle to the ON mode.

Symptom	Check Items	Also check for
The security system sounds randomly while the doors are locked	Tripped sensor history
The horn does not sound and/or the headlights do not flash when the PANIC button on the remote is pressed	Symptom troubleshooting
Security alarm system will not arm	Symptom troubleshooting
All the doors will not lock or unlock with driver's door key cylinder or door lock switch or keyless transmitter	Poor ground (G501, G502) Blown No. D6 (10 A) fuse in the driver's under-dash fuse/relay box MICU input test Transmitter test
Driver's door will not lock or unlock	Poor ground (G502) Blown No. D3 (10 A) fuse in the driver's under-dash fuse/relay box Door switch test (check the door switch ON/OFF information with the HDS) MICU input test Actuator test
Left rear door will not lock or unlock	Poor ground (G701) Blown No. D1 (10 A) fuse in the driver's under-dash fuse/relay box MICU input test Door switch test (check the door switch ON/OFF information with the HDS) Actuator test
Front passenger's and right rear doors will not lock or unlock	Poor ground (G505, G751) Blown No. D2 (10 A) fuse in the driver's under-dash fuse/relay box MICU input test Door switch test (check the door switch ON/OFF information with the HDS) Actuator test
Passenger doors will not unlock with the transmitter or key cylinder switch, but will unlock with the inside door unlock switch	Driver's door lock knob switch test (check for door lock knob switch ON/OFF information with the HDS)
Doors automatically relock 30 seconds after being unlocked with the remote even though a door has been opened	Symptom troubleshooting
Auto door unlock does not work	Symptom troubleshooting