99 acura 3.5rl 871xp rm oem alarm problem

I was having problems with my OEM alarm on my 99 Acura 3.5RL. It would go off randomly for no apparent reason, without any apparent trigger or cause. After much googleing and many forum searches on many different sites, i came to the conclusion that my hood latch sensor had gone faulty and decided to "jump" the 2 pin connector.

Feeling that i needed better car security, i decided to have my python 871xp installed with the 555d bypass module. unfortunately the car would not remotestart although the other functions worked perfectly fine.Under the advice of my installer, i plugged the hood latch sensor back in. This however did not solve any problems i had with the 555d, so i purchased the TBXKEY and had that installed with great success.

My only problem now is that when i try to remotestart the car, the OEM alarm will go off occasionally, mostly when the car has been sitting for a few hours (4 or more) or when the weather is cold. I have tried to jump the hood latch sensor again but doing so only causes a zone fault detection by the Python 871xp, therefore disabling me from remotestarting the car.

Any and All input is appreciated!
Thanks!

If the OEM alarm module is under dash with a white plug, you should be able to remove and discard it safely.

-------------
Amateurs assume, don't test and have problems; pros test first. I am not a free install service.
Read the installation manual, do a search here or online for your vehicle wiring before posting.

not quite that simple, its a multiplex system

Then a dealer diagnostic would show up the problem.

-------------
Amateurs assume, don't test and have problems; pros test first. I am not a free install service.
Read the installation manual, do a search here or online for your vehicle wiring before posting.

damn now the oem alarm goes off everytime i remote start the car, and its gone off 3 times today just sitting in my driveway

Have you tried physically removing it?
What do you mean by multiplex?
Honda never used a multiplex system except for the immobiliser, nothing to do with the alarm, they used CAN data but that was from about 07.
I know the factory alarm on UK Civics could be treated this way until about 05.

-------------
Amateurs assume, don't test and have problems; pros test first. I am not a free install service.
Read the installation manual, do a search here or online for your vehicle wiring before posting.

from the factory service manual:

System Functions
• Multiplex Control System (Multiplex function, Wake up/sleep function, Fail-safe function, Self-diagnosis function*)
*: Self-diagnosis function mode 1 is the self-diagnosis for the multiplex control system.
Self-diagnosis function mode 2 is the failure diagnosis for the input line of each system.
• Integrated Control System (Engine oil pressure indicator flasher circuit, Key-in reminder circuit, Light-on reminder circuit,
Seat belt reminder circuit)
• Dash Lights Brightness Control
• Entry Light Control System
• Rear Window Defogger
• Trunk lid Opener
• Power Door Locks (with keyless entry system)
• Power Window (with key-off timer operation)
• Wiper/washers (with speed respondent intermittent wiper)
• Security Alarm System
• Interlock System (see section 14)

OK, then back to my second post where a dealer should be able to rectify/turn it off via the diagnostics.
9/10 low battery, door, hood, trunk switches on of these faulty.

-------------
Amateurs assume, don't test and have problems; pros test first. I am not a free install service.
Read the installation manual, do a search here or online for your vehicle wiring before posting.

yea im going to ask my instructors tomorrow if they have the tool i need to fix it.

a new development is that now since me and my teacher have been trying to diagnose the problem via checking the voltage to the switch through the harness and checking the health of my battery, and everything seems fine. Now the alarm doesnt go off, but if the car sits for a few hours, (say 2-8 hours) either:

a) the oem alarm will go off and the car will remote start
b) the oem alarm will go off and the car wont remote start
c) the oem alarm wont go off and the car wont remote start
or more rarely
d) everything will work properly, the oem alarm wont go off, and the car will remote start

(a) usually happens in the morning after the car has been sitting all night (4+ hours at least) therefore forcing me to disarm the car and rearm the car, all while remotestart is working and operational

(b) happens more often that (a) also in the morning, after the car has been sitting all night (4+ hours at least) therefore forcing me to disarm the car and rearm the car, all while remotestart is attempting to remotestart the car, but not able to crank the engine (just clicking and flashing of the remotestart module, but no starter crank)

(c) happens randomly, remotestart is attempting to remotestart the car, but not able to crank the engine (just clicking and flashing of the remotestart module, but no starter crank)

(d) happens more likely after i drive the car to a destination, and then return to the car, and/or remotestart within the hour of arriving at my destination


anyone have any ideas?

also yesterday and today, i tried to remotestart the car only to have (b) happened again, so i took out the key in the bypass module put it in the ignition and started the car, then i put it back in the bypass module and remote started the car just fine... but i know for sure that if i let the car sit for 2 hours or more i will have problems remotestarting the car again

im starting to get really confused, i dont know where to begin troubleshooting the problem...