First step is to have a load test done on the battery as batteries have a natural tendency to self discharge especially if a bit old
next is to have an auto electrician place an amp meter in the ground circuit to check the current flow that is causing the drain
it could be a faulty relay, glove box light , boot light but generally the very small drain to run immobilizers ,and the ecm will not affect a good battery as it is the regions of millionths of amps ( miliamps)
SOURCE: Security code for my 1999 acura TL stereo system
look on the fusebox, glove compartment for a number
SOURCE: Can't lock car with central locking, but unlocking works normally
Hi,welcome to fix ya.
there have been problems with the door lock controll in the driver MICU . too repair this you will need to replace the driver side fuse box (it contains the MICU) . In my shop this repair usually runs about $425.00.
SOURCE: Intermittent Power Loss
There are many things it could be but a few suggestions are to have the battery load checked (battery could be faulty), check for broken or corrosion wires, check fuses inside power distribution box (loose or corroded connections), and see if there might be an association with the ignition switch and your power lose. I dont think it applies to your issue but its not unheard of to have a faulty ignition switch. Good luck.
SOURCE: Unable to lock doors with a key..
plug in the wires to the; or, replace the; lock solenoid. (inside the door)
SOURCE: I just had my battery
Its a security code for unlock the audio system; check in the l?ast pages from the owners manual (any similar card with the unlock code) or with the VIN number, visit your dealer. Remember that this is one unique number for each audio system, anybody can send this info for Internet, then this "security" word dont work for your or other owners.
Hope this helps. Good luck.
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