To Many Codes
28TCS c1222H
c1226H
c1233HC
c1282H
c1291H
c1292H
40BCM B2578H
AO-LDCM B2204H
B2282H
B2284H
U1064H
A1RDCM B2253H
B2283H
B2285H
B2265H
U1064H
A6-SCM BO851H
BO8565H
The "diagnostic display" mode is entered with the following procedure:
1) Turn on the ignition but don't start the engine.
2) Press the "reset" button to turn off any warning messages
3) Press and hold "options"
4) While holding "options", press "fuel" four times within a 10-second period.
When first engaged the on-board diagnostics go into an "automatic" mode which shows all parameters: PCM-TCS-RTD-BCM-IPC-radio-HVAC-LDCM-RDCM-SCM-RFA. If there are no problems, you will see "no more codes" on the ICP display.
The computer will show two kinds of codes, "current" and "history," designated "C" or "H". A current code indicates a malfunction is present in the system whose module is displaying data. A history code indicates a past problem.
When the screen displays "manual diagnostics," select the desired module by pressing the "options" button to go forward or the "trip" button to go back. Press "gages" to go forward or "fuel" to go back.
To exit the diagnostic mode at any time, press "E/M". If you want to erase or "clear" codes, press "reset."
1997 DTC Codes
1998 DTC Codes
1999 DTC Codes
2000 DTC Codes
2001 DTC Codes
2002 DTC Codes
2003 DTC Codes
2004 DTC Codes
The C5 computer transmits the following diagnostics: Powertrain Control Module (PCM),Traction Control System ,Active Handling System, Real Time Damping (RTD), Body Control Module (BCM), Instrument Panel Cluster (IPC), radio, heating-ventilation-air conditioning (HVAC), Left Door Control Module (LDCM), Right Door Control Module (RDCM), Seat Control Module (SCM) and Remote Function Actuation (RFA).
Inititially, the on-board diagnostics go into the "automatic" mode which shows each module's DTCs in a pre-set sequence:
• 10 PCM Powertrain Control Module page 6-357 - 6-361
• 28 TCS Traction Control system ABS on page 5-86
• ?? RTD Real Time damping page 3-136 (I do not have this option)
• 40 BCM Body Control Module page 8-405 UTD Page 8-727
• 60 IPC Instrument Panel Cluster page 8-508
• 80 radio page 8-213
• 99 HVAC Heater Vent-Air Conditioning page 1-118
• A0 LDCM Left Door Control module page 8-904 to 8-951
• A1 RDCM Right Door Control Module page 8-904 to 8-951
• AC SCM Seat Control module page 8-1064 -8-1082
• B0 RFA Remote Function Actuation page 8-676
For each module, all DTCs will be displayed. If none are present in a module, you will see "no more codes" on the ICP display.
As stated earlier there are two kinds of DTCs, "Current" and "History," designated with a letter suffix, "C" or "H". A current code indicates that the malfunction is present in the system whose module is displaying data. A history code indicates a problem existed in that module sometime in the last 40 or 50 ignition cycles. When not accompanied by a current code of the same number, it is possible it's evidence of a previous problem, now solved, that was not removed by clearing codes. More likely is that a history code indicates an intermittent malfunction. "Intermittents" are the most challenging DTCs. An intermittent may have happened only once, may have happened more than once but is inconsistent in its appearance or may be happening on a regular basis but not at the time the IPC is displaying codes. History codes can also be caused by a current malfunction in a system that is not operating at the time DTCs are displayed. An example is the rear window defogger which doesn¹t operate until the BCM detects engine rpm. For history codes set by a system that does not operate with the key on and engine off, a special diagnostic tool called a "scan tester" is necessary to properly diagnose the malfunction.
Once the IPC has displayed all 11 modules, the system goes into the manual mode which allows selection of each module using combinations of DIC buttons. The manual mode can also be entered at any time during the automatic sequence by pressing any button except "E/M". Once the IPC displays "manual diagnostics," you may select a particular module by pressing the "options" button to go forward or the "trip" button to go back. Once a system is selected and a DTC is displayed, if more than one are present; press "gages" to move forward or "fuel" to go back.
To exit the diagnostic mode at any time, press "E/M". If you want to erase or "clear" codes, press "reset." Clearing a code does not repair a problem. You are simply erasing the evidence of it in the module's memory.
• 10 PCM Powertrain Control Module page 6-357 - 6-361 Domestic
• A=DTC set immediately and MIL is turned on
• B=MIL turned on after 2 consecutive drive trips
• C=After one failure and stored in History MIL not turned on
Information From:
CORVETTE PERFORMANCE WORLD HOME
http://www.corvetteweb.com/
Last edited by Boulty1961; Dec 3, 2008 at 11:12 PM.
C1233 = Right Front Wheel Speed Circuit Open or Shorted.
As stated above, clear all the codes and go for a drive. Then see what comes back.











