Question about Honda Accord
I am a mechanic and had the same problem with a 2005 Acord that I purchased couple of months ago. Contact through the trade provided little help. The problem arose during a week that we in Adelaide, South Australia had a record o 40+ degrees centigrade heat. I noticed the drop knob slightly moving when the immobiliser was activated, but the drivers door failed to lock. Key locking would lock all doors however.
The cost of a door actuator from a Honda dealer was $185.00 (Aus), about $250 (US). The spare parts guy told me they had them in stock and sold a number of them. As a result I decided to find out whether the actuator was in fact faulty. I susequently removed the door lock and actuator assembly from the door. (A fiddly type job). The actuator assembly is in a plastic sealed assembly. By using a lot of patience and a box cutter I was able to cut around the assembly and then carefully lever the plastic housing apart. This revealled the small electric motor (similar to a slot car motor) that drove a worm and wheel assembly and a system of cams that actuated the door lock system. I found on dismantling the electric motor that the armature was coated with grease from the wormwheel /cam assembly that is mounted above the motor when installed in the vehicle. I cleaned the armature and brushes using superfine wet and dry carborundum paper, undercut and cleaned out the two armature segments of all remaining grease with a solvent. The motor was then tested with 12 volts and found to be ok. I then reinstalled the motor and glued the housing back together. It now works fine. I believe the housing was either initially overfilled with lubricant or that the high ambient temperature caused the grease to melt and flow into the elecric motor contaminating the motor. (There is no seal between the gearbox and the electric motor). The job took a few hours from start to finish but I saved the cost of purchasing the part and didn't let it beat me.
Cheers and beers
Posted on Mar 26, 2009
Hi Guys... if its just one door not working, it is certainly the actuator. Will cost $300 minimum at the dealer... thats per door! Usually if 1 goes, the others soon follow as they have been used to lock or unlock exactly the same amount of times.
I have bought the replacement actuator from the dealer and done the job myself... takes about 45min-1hour... but it is pretty easy and no special tools required.. I videoed it last time I did it, email me at firstname.lastname@example.org if you would like a copy of the vid.
Posted on Dec 19, 2009
If you can get hold of a door lock wiring diagram (maybe photocopied from the dealer?) and unplug the wiring connector to the door lock motor, put a testlight across the positive and negative terminals for the lock motor. If the light flashes on for a second or so when you press the remote button then the motor is getting power but not operating, so it is faulty. If there is no flash, either you've hooked it up wrong or there is a wiring or central lock module fault. The time and effort that you put into doing this is probably better spent on taking the car to the dealer, as their trained technicians will diagnose the fault quickly. And they'll probably go through the diagnosis procedure regardless of whether you've already done it, rather than replacing parts on the say so of the customer who may or may not have diagnosed the fault correctly (no offense intended).
Hope this helps,
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Posted on Jan 02, 2017
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