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.
Before troubleshooting, make sure the fuses associated with the system is OK.

Symptom	Check Items	Also check for
The horn does not sound and/or the headlights do not flash when the PANIC button on the remote is pressed	Horn sound check Headlight operation check Remote test
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 remote	Poor ground (G301) Blown No. B10 fuse Body control module input test Driver's door control unit input test Remote test
Driver's door will not lock or unlock	Poor ground (G301) Blown No. B15 and/or No. B23 fuse(s) Door switch test (check the door switch ON/OFF information with the HDS) Body control module input test Driver's door control unit input test Driver's door lock actuator test
Left rear door will not lock or unlock	Poor ground (G401) Blown No. B30 and/or No. B47 fuse(s) Door switch test (check the door switch ON/OFF information with the HDS) Driver's door control unit input test Left rear door lock actuator test
Front passenger's door will not lock or unlock	Poor ground (G306) Blown No. B31 and/or No. B39 fuse(s) Body control module input test Door switch test (check the door switch ON/OFF information with the HDS) Front passenger's door lock actuator test
Right rear door will not lock or unlock	Poor ground (G404) Blown No. B31 and/or No. B39 fuse(s) Body control module input test Door switch test (check the door switch ON/OFF information with the HDS) Right rear door lock actuator test
Passenger doors will not unlock with the remote 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) Driver's door key cylinder switch test (check for door key cylinder switch ON/OFF information with the HDS)