Rear Integration Module

[jwanes]

Does anyone know what the Rear Integration Module (RIM) does? Is it related to the RSS? I get the code "RIM U1255 History" once in a while, which is "Class 2 Communication Malfunction (Serial Data Line Malfunction)".

Thanks in advance for the replies.

[JimD]

By themselves, U codes are not anything to lose sleep over. If you do not have a firm B or C code that also points to the RIM, motor on down the road.

To answer your question, the RIM is located behind the rear seat back cushion on the right side below the angled chassis brace.

[jwanes]

Thanks, JimD. Do you know what the RIM does, and is it related to teh RSS?

[JimD]

What does it do? Like any module, it samples and processes inputs from various switches and sensors to determine when other circuits are opened or closed, or enabled. In other words, there is not a simple one sentence answer.

As one example; there is a solenoid in the shift linkage that prevents you from shifting out of park. That solenoid is powered up by the contacts of a relay. The relay coil receives power through the ignition switch. But the RIM logic determines when the relay coil circuit is completed to ground. So, you 'could' say the RIM unlocks the shift lock; but that is true only if your foot is also on the brake pedal.

I know of no RSS signals that are sampled by the RIM. There is no operational connection between the CVRSS module and the RIM. If you are seeing persistent C codes from your suspension, the code will point you toward a suspect component.

[Murphyg]

Originally Posted by JimD

By themselves, U codes are not anything to lose sleep over. If you do not have a firm B or C code that also points to the RIM, motor on down the road.....................................

Ive gotten it too.
But Ive gotten it with the B as you have mentioned Jim.

RIM B1328 History
You mentioned a "firm" B code. Does a History qualify there ??

Ive also recieved the same B1328 under the DDM. Also a History ??

Should I be getting this looked at ?

Could you point me in the direction as to what these may mean ???

[JimD]

Originally Posted by Murphyg

Ive gotten it too.
But Ive gotten it with the B as you have mentioned Jim.

RIM B1328 History
You mentioned a "firm" B code. Does a History qualify there ??

Ive also recieved the same B1328 under the DDM. Also a History ??

Should I be getting this looked at ?

Could you point me in the direction as to what these may mean ???

B1328 is basically an overvoltage code indicating the system voltage was (History) or is (not History) greater than 15.9 volts for at least 1.2 seconds.

At least two things can cause this code. One would be having to jump start your car with an external power source that has poor voltage regulation. Like a battery charger, or another vehicle with the engine running (in that case the other vehicle has a charging system problem). Any of this ringing a bell?

Another cause could be your own alternator voltage regulator is failing. If you have not had to jump start from an unknown voltage source, you should get your charging system checked.

[Murphyg]

Originally Posted by JimD

B1328 is basically an overvoltage code indicating the system voltage was (History) or is (not History) greater than 15.9 volts for at least 1.2 seconds.

At least two things can cause this code. One would be having to jump start your car with an external power source that has poor voltage regulation. Like a battery charger, or another vehicle with the engine running (in that case the other vehicle has a charging system problem). Any of this ringing a bell?

Another cause could be your own alternator voltage regulator is failing. If you have not had to jump start from an unknown voltage source, you should get your charging system checked.

To tell the truth there is a bit of familiarity there, (ringing of a bell).

The first time I read that code was months after I drained my battery messin with the stereo.(Never checked the codes before) Was doin that just after getting it and never checked codes for mnths after. Had to boost

Have since cleared the codes and never had to boost or anything since, but ended up with the same ones again.

An RIM and a DDM...Both both B1328

Appears to keep a good charge. No problems starting even after sitting with ignition off before going into work and then again when coming out at lunch to smoke with just the radio on.

Fires right up when needed.

I also have an IRC U1016 loss of comunication in history that reapears.

Could it all be tied together as the loss of comm ??

[EcSTSatic]

I was having all sorts of intermittent problems with the doors not locking and/or unlocking properly, the dash lights not coming on when I started the car, wierd messages on the dash, etc after I replaced a dead battery. Another battery didn't fix it. After replacing the RIM everything started working fine again.

[Murphyg]

Originally Posted by EcSTSatic

I was having all sorts of intermittent problems with the doors not locking and/or unlocking properly, the dash lights not coming on when I started the car, wierd messages on the dash, etc after I replaced a dead battery. Another battery didn't fix it. After replacing the RIM everything started working fine again.

Will keep all that in mind if by chance it goes that way for me.
Right now its only the tilt steering when exiting and only rarelly.
The codes are there though.
But will be sure to remember this thread if the time comes.
TYA