I had a charge fault this morning and pulled some codes off of my DIC. Can someone help me with the real meaning of these? Anything I should worry about? These are also all history codes, there are not any that are displaying as current.

A1 RDCM
U1064

H0 LDCM
U1064

H1 LDCM
U1064

99 HVAC
B0363
B0367

Radio
U1064
U1096
U1016

IPC
B0516
U1016
U1064
U1040
U1088
U1176
U1160

 

http://www.corvettedoctor.com/2004_DTC_Codes_Page2.html

 

one more http://www.obd-codes.com/trouble_cod...d-ii-codes.php

 

I have these, but the problem is I don't know what they really mean.

 

Just getting the descriptor of the codes doesn't always help, you need the associated troubleshooting pages from the FSMs. Problem is those are "usually" to complex to repost.

I'll take a look at my FSMs to see if what is said.

 

I guess the most important thing for me to find out is which one relates to the charge fault. I don't know enough to relate...

 

Here's what I have so far. Need to eat dinner is ready, I'll look at the others afterwards.

IPC
B0516
The instrument panel cluster (IPC) receives vehicle speed information from the powertrain control module (PCM). The IPC receives a 4000 pulse-per-mile vehicle speed sensor (VSS) input over a dedicated input from the PCM. The PCM is responsible for processing the VSS data and sending it to the IPC. The IPC monitors the VSS output information sent from the PCM for an out of range condition.

Condition: IPC detects vehicle speed over 200 mph for 1 second.

Action: IPC displays vehicle speed of 200 mph and code set.

Condition to clear: IPC detects speed is less than 200 mph.
The history DTC clears after 50 consecutive ignition cycles and the condition is no longer present.

(Translation, a gremlin nothing to worry about if no further occurrence).

U1016

Loss of communications with PCM (Powertrain Control Module)

U1064

Loss of communications with BCM (Body Control Module)

U1040

Loss of communications with EBCM (Electronic Brake Control Module)

U1088

Loss of communications with SDM (Sensing and Diagnostic Module)

U1176

Loss of communications with RCDLR (Remote Control Door Lock Receiver)

U1160

Loss of communications with DDM (Driver Door Module)

My suspicion is this occurred about the same time where the must have been a massive communication failure of all systems. If they continue investigate for loose connections. (That will get detailed).

Most of them will clear after 50 ignition cycles if no reoccurrences.


The rest of those are mostly repeats of the above except for the actuator feedback opens:

B0363 Left Actuator Feedback Open

B0367 Right Actuator Feedback Open

Those two are HVAC related (hydraulic, vacuum, etc.) But again they appear to be related to an open circuit as a result of a loss of communications. And they may also be related to a Vacuum Control Assembly (RH side of blower motor), and/or air temperature actuator (R & L).

The RDCM and LDCM, I wasn't able to determine right off what those are, but my guess is Door Control Module (Left and Right). But I could be wrong on those two.

I'd clear them all and see what re-appears. They are all loss of communication errors in one form or another.

 

Thanks for the info. I did clear them out yesterday.

BTW, could they all be related to the charge system fault? This did happen when I started the car just before the memory feature got the steering wheel in the memorized position.

 

Very possible.

 

this is happening to my car recently...
what ever happened with you and yours?