Symptom Troubleshooting

WARNING: This page is about a different car, the 2006 Honda Odyssey and 2005 Honda Odyssey. However, it is still accessible from the selected car via links, so may be relevant.

Troubleshoot the keyless entry/security alarm system by the symptom index.

SYMPTOM TROUBLESHOOTING

Symptom	Location	Possible cause
The door will not lock or unlock.	Door lock system	B-CAN troubleshooting test mode A (see TROUBLESHOOTING - B-CAN SYSTEM DIAGNOSIS TEST MODE A ) Control unit input test
	Transmitter	Transmitter test Transmitter programming
	Wire harness	Control unit input test
	Steering lock	Ignition switch test Ignition key switch test NOTE: If the key is in the ignition key switch or the ignition switch is ON (II), the door lock system does not function.
	Keyless receiver	Transmitter programming
	Door multiplex control unit	Door multiplex control unit input test
The door will not lock.	Door switch	Door switch test
The door will not lock.	Door lock system	Door lock knob switch test Control unit input test
The door will not unlock.	Door switch	Door switch test
The door will not unlock.	Door lock system	Door lock knob switch test Control unit input test
Transmitter will not program.	Transmitter	Transmitter test
	Ignition switch	Ignition switch test
	Wire harness	Control unit input test
	Keyless receiver	B-CAN troubleshooting test mode A (see TROUBLESHOOTING - B-CAN SYSTEM DIAGNOSIS TEST MODE A ) Power window master switch input test
	Door lock system	Control unit input test
Door will relock even if the door is opened once after unlocking with remote.	Door switch	Door switch test
Door will lock and unlock with the remote even if the ignition switch is ON (II).	Steering lock	Ignition switch test NOTE: If the ignition switch is ON (II), the door lock system does not function.
Door will lock or unlock with the remote even if the key is in the ignition key switch.	Steering lock	Ignition key switch test NOTE: If the key is in the ignition key switch, the door lock system does not function.
Sometimes door will not lock or unlock.	Door switch Door key cylinder switch Tailgate latch switch	Door switch test Door key cylinder switch test Tailgate latch switch test