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 press the engine start/stop button to select 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 - Refer to: Keyless/Power Door Locks/Security System Symptom Troubleshooting - The horn does not sound and/or the headlights do not flash when the PANIC button on the remote/transmitter is pressed
Security alarm system will not arm	Symptom troubleshooting - Refer to: Keyless/Power Door Locks/Security System Symptom Troubleshooting - Security alarm system will not arm
All the doors will not lock or unlock with driver's door key cylinder or door lock switch or keyless transmitter	Poor ground (G401, G501) Blown No. C1 (20 A), and/or No. C34 (7. 5 A) fuse (s) in the under-dash fuse/relay box MICU input test Transmitter test
Driver's door will not lock or unlock	Poor ground (G401, G501) Blown No. C5 (15 A) and/or No. C13 (15 A) fuse (s) in the under-dash fuse/relay box (without selectable unlock) Blown No. C6 (10 A) and/or No. C7 (10 A) fuse (s) in the under-dash fuse/relay box (with selectable unlock) Door switch test (check the door switch ON/OFF information with the HDS) Actuator test
Left rear door will not lock or unlock	Poor ground (G401, G501) Blown No. C5 (15 A) and/or No. C13 (15 A) fuse (s) in the 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 doors will not lock or unlock	Poor ground (G401, G501) Blown No. C4 (15 A) and/or No. C12 (15 A) fuse (s) in the under-dash fuse/relay box MICU input test Door switch test (check the door switch ON/OFF information with the HDS) Actuator test
Right rear doors will not lock or unlock	Poor ground (G401, G501) Blown No. C4 (15 A) and/or No. C12 (15 A) fuse (s) in the under-dash fuse/relay box MICU input test Door switch test (check the door switch ON/OFF information with the HDS) Actuator test

Symptom	Check Items	Also check for
Passenger doors will not unlock with the keyless 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)
Doors automatically relock 30 seconds after being unlocked with the keyless remote even though a door has been opened	Symptom troubleshooting - Refer to: Keyless/Power Door Locks/Security System Symptom Troubleshooting - Doors automatically relock 30 seconds after being unlocked with the remote even though a door has been opened
Auto door unlock does not work	Symptom troubleshooting - Refer to: Keyless/Power Door Locks/Security System Symptom Troubleshooting - AUTO DOOR UNLOCK does not work