Accessing and Reading Diagnostic Trouble Codes

On Board Diagnostic Flow Diagram:

Diagnostic Display Panel:

Climate Control Driver Information Center:

DIAGNOSTIC CODE DISPLAY

To display the diagnostic codes, proceed as follows:

1. Turn ignition "ON".

2. Depress the "OFF" and "WARMER" buttons on the Climate Control Panel simultaneously and hold until the segment check appears on the Climate Control Panel and Driver Information Center (CCDIC).

SEGMENT CHECK

The purpose of illuminating the IPC and the CCDIC is to check that all segments of the LED displays are working. The turn signal indicators DO NOT light during this check. If any of the segments are inoperative, the affected display panel will need to be diagnosed.

TROUBLE CODE DISPLAY

After the segment check, any trouble code stored in computer memory will be displayed. Codes may be stored for the PCM, BCM, Lighting, SIR ABS/TCS, or RTD systems.

Each trouble code consists of the system abbreviation: (P=PCM) (B=BCM) (V=Lighting) (R=SIR) (T=ABS/TCS) (S=RTD), a three digit code identifier, and the letter C or H. All codes for each system are displayed together, in the order of their three digit number (lowest first). The final digit of the code, a "C" or "H" is used to indicate whether the code is Current or History. A "C" means the fault was still present the last time the diagnostic test was run, while "H" means the failure was not present the last time the code was tested for.

If no codes are present for a system, a "NO X CODE" message (with "X" being the system i.e. P, B, V, R, T, or S) will be displayed. If the communication line to a component is not operating, a "NO X DATA" message will be displayed, indicating that the BCM could not communicate with that system.

At any time during the display of trouble codes, if the "AUTO" button on the CCDIC is depressed the system will exit "Service Mode" and go back to normal vehicle operation.

EXITING DIAGNOSTIC MODE

To get out of the diagnostic mode, depress the "AUTO" or "DEFOG" button, or turn the ignition switch "OFF". Trouble codes are not erased when this is done.