I could use some help in troubleshooting my passive alarm system. The day before I left for vacation I was driving down the road when I heard the door locks cycle and the rear hatch popped open at speed...there is a design flaw!!!.....I tried to reset the system, reprogram the fobs but nothing seems to get the system to work again...when I got back from vacation my battery was dead, it seems that the passive entry system lamp on the driver info center stayed on full time...Removing the fuses also does not turn it off. The only way to get the light off is to insert the key with the engine off and then remove it. This process for some reason turns the lamp off.

So here are the symptoms...was working, does not work anymore, hatch glass popped open, can't reprogram, and the light on the info center stays on... can anyone help me?

 

putting in the key dissables the system, ive got a 94 that i dont have any key fobs for cause the previous owner decided they would keep them. Sounds like maybe, your module has shorted out,thats about the only way i can think the rear hatch could open like that, try unplugging it and see if the light comes on with it dissconected. If you can,see if you can get another car with the same module and test it, that should tell you if it the module that has failed. If its still doing the same with a different module, then you should also check the door switches and all related wiring.

 

There is a procedure to interrogate the CCM as to what the problem is;
FOB, PKE Module. etc. for your "93". You need someone with a factory manual to specify which pins on the DLC to ground to get codes from the CCM. Try the search function if no one comes up.

 

check the battary in the fob

 

heres the diags conection for the 93 conector, the two pins top right are A and B, join them and turn on the key,but dont start the car.
the rest of this is for a 94 to 96 but will be very much the same procedure if not exactally the same.

do the ubove conection on the diagnostic terminal,and then,
turn the ignition switch to "On" without starting the engine.

The speedometer will display any codes using the same protocol as the 1990-1993 model but there are some changes in the designation for the modules plus additional modules are added:

Module "1" is still the CCM module.

Module "4" is now called the PCM module (Powertrain Control Module) because automatic transmission computer control was added to Engine Control Module in 1994.

Module 7 (on the 1996 model only) is the RTD module. (This is the Real Time Dampening module which replaced the Selective Ride Control module in 1996).

Module 9 is the ABS/ASR module number from 1994 through 1996.
Finally, Module "A", the DERM (Dynamic Energy Control Module --- (the air bag control module) will be requested to show any codes.

Just like the 1990-1993 display, you read the codes on the speedometer (big) and read the module number on the trip odometer (small).

A series of dashed lines for instance “ - - -“ indicates no more stored codes for that module.

A code showing as “C12” for the CCM module (module #1) means no codes are stored. So C12 is a good thing to see.

Again, you can cause the codes to repeat by turning the ignition off for five seconds and then back on.

Turn the ignition off and remove the short to restore normal operation.

To clear codes in the CCM proceed as follows:

1. With ignition "off" ground terminal #12 of the DLC (use bent paper clip to connect pin 4 to pin 12)

2. Turn ignition "on".

3. Press trip/odo button on the DIC until 1.7 appears in the trip
monitor area of the instrument cluster.

4. Press eng/met button on the DIC & hold until "---" appears in the
speedometer area of the cluster, this will clear CCM DTC'S.


To clear PCM/ECM codes do the following:


1. Press the trip reset button on the DIC until the desired system is displayed. In this case it will be 4.0.

2. Press trip/odo button on the DIC until the desired diagnostic mode(4.7) is displayed on the trip monitor area of the cluster.

3. Press & hold the eng/met button on the DIC until "---" is
displayed in the speedometer area of the cluster, this will clear PCM codes.


To clear ABS/ASR codes do the following:

Same as above but you’re looking for “9.7” on the trip odo

If you get codes you dont know,post them and we can find them out for you.

 

I checked the diagnostics by shorting terminal a and b together and turning the ignition on...i received code 12 from the blinking check engine light.

I removed the battery from the fob and it measures 2.97 VDC.

what else can I check?

Is there a reprogramming that can be done? where is teh PKE module connections? Is there anything I can do? I appreciate any leads?

 

Mine was giving me intermittent problems. I changed the battery in the fob and for about a month everything was OTAAY then I started getting intermittent problems. To make this story short the fob battery was making intermittent contact. I used 3m weather strip adhesive to stick a little piece of foam on the battery and viola it has been good for a couple of months.
I hope your fix is this easy.

Mike

 

A & B won;t give you diagnostics for your PKE if the procedure is the same for my 95. Which requires 2 different pins. If someone with a 93 manual is available they can give you the correct pin numbers that the PKE light in the DIC will flash for codes. Anybody?????