Keyless/Power Door Locks/Security System Symptom Troubleshooting Index

WARNING: This page does not describe the selected car, but rather 8 other vehicles, including the 2025 Honda Odyssey, 2024 Honda Odyssey, 2023 Honda Odyssey, 2022 Honda Odyssey, and 2021 Honda Odyssey. However, it is still accessible from the selected car via links, so may be relevant.

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 recall
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 remote	Poor ground (G401) Blown No. C38 (20 A) fuse in the under-dash fuse/relay box Body control module input test Power window master switch input test Remote test
Driver's door will not lock or unlock	Poor ground (G401) Blown No. C11 (10 A) fuse in the under-dash fuse/relay box Blown No. C14 (10 A) fuse in the under-dash fuse/relay box Door switch test (check the door switch ON/OFF information with the HDS) Body control module input test Power window master switch input test Driver's door lock actuator test
Left sliding door will not lock or unlock	Poor ground (G603) Blown No. F1 (10 A) fuse in fuse/relay holder B Body control module input test Door switch test (check the door switch ON/OFF information with the HDS) Left sliding door lock actuator test
Front passenger's door will not lock or unlock	Poor ground (G401) Blown No. C12 (10 A) fuse in the under-dash fuse/relay box Blown No. C13 (10 A) fuse in the under-dash fuse/relay box 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 sliding door will not lock or unlock	Poor ground (G401) Blown No. C10 (10 A) fuse in the under-dash fuse/relay box Blown No. C26 (10 A) fuse in the under-dash fuse/relay box Body control module input test Door switch test (check the door switch ON/OFF information with the HDS) Right sliding door lock actuator test

Symptom	Check Items	Also check for
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)
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