major problem with rsx doorlocks

I was thinking about this a little more, and I haven't done car audio in a few years, but i remember on the older civics, that when you replaced the factory head unit ,you had to use a special harness, or jump a couple of wires to retain the keyless and domelight.......just an idea, not sure if all of the hondas and acuras went to this system. If you can't find anything, i would post on the Audio side of the forums, and see if someone has an answer.

Doorlocks will stop working in Toyotas b/c of a bad fuse for the dome light.

As mentioned before -- you need to obtain a copy of the service manual -- NOT the owner's manual.  The service manual will show you EXACTLY in schematic form which fuses *** usually more than one *** affect the power supply to the doorlock/keyless entry unit.

Often, the SECU/BECU is a very integrated module that also controls such functions as turn signaling, brakes, parking lights, etc.  So, it follows that this unit receives power from many circuit avenues.  I recently blew a doorlock fuse in a Toyota Camry '05 I was working on and found via the SERVICE MANUAL (not the owner's manual) that there are over 7 fused power supplies to the BECU that will affect performance of the doorlock/keyless entry system, including the dome light fuse.

Best of luck ... if all else fails and you cannot obtain a service manual with electrical wiring diagrams, just start checking fuses .. betcha you'll find one that is blown.  Of course, the only way to find a short in the system is to undo all your wiring looming and electrical taping and find where a loose connection may be.

I would venture to say that it's not the brain at this point .. likely an Acura fuse .. however, the brain may have contributed to the blow fuse to begin with -- perhaps you've got the doorlock to the 3 second setting, not the 0.750 second or 0.125 second setting .. and this may have, over time blown some fuse in the Acura doorlock/keyless entry system.  Also... you'd be surprised how wires can get crimped and pnched over time by the weight of wire bundles and get chaffed to the point where the copper wire touches some metal component. 

Also .. do not take it to Acura until you've done a thorough investigation ... I also own an Acura (TL) and know for a fact that they will likely NOT warrant the work they need to do to resolve your issue, and will most certainly blame it on the alarm/remote start brain/installation. 

I would also post on the Acura RSX forums.. very focused discussions will likely turn up the answer as well

This link will take you to a site that lets you buy the service manual *pdf for $9.00 ... that's a steal compared to the hardcopy price (usually up to a couple hundred bucks).

http://www.tradebit.com/filedetail.php/723083

Or download it free here:

http://forums.clubrsx.com/showthread.php?t=348032

Try the second link .. it works.

Keyless/doorlock system .. starts on page 22-156

After looking at the complete circuit diagram .. there are over 8 different fuses involved in this system as well as the Multiplex system (BECU):

Under dash fuse #10 (7.5 A) is the one that controls it when the ignition is not HOT (i.e. not the in the II or III) position)

Under hood fuses: #20 is the fuse in-line before it gets to that under dash fuse I just mentioned

Under hood fuse #9 powers the doorlock system during the Ignition in the II and III position.

I think you have your answer, best of luck.