GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Pontiac 🢒 2000 🢒 Sunfire 🢒 Body and Accessories 🢒 Body Control System 🢒 Diagnostic System Check - Instrument Cluster

Test Description

The number(s) below refer to the step number(s) on the diagnostic table.

  1. Lack of communication may be due to a partial malfunction of the class 2 serial data circuit or due to a total malfunction of the class 2 serial data circuit. The specified procedure will determine the particular condition.

    2.

  2. The symptom list will determine the correct diagnostic procedure to use when no DTCs are present.

    3.

  3. The presence of DTCs which begin with "U" indicate that some other module is not communicating.

Step

Action

Yes

No

1

Install a scan tool.

Does the scan tool power up?

Go to Step 2

Go to Scan Tool Does Not Power Up in Data Link Communications

2

  1. Turn ON the ignition, with the engine OFF.
  2. Attempt to establish communication with the following control modules:
    3. • Instrument Panel Cluster (IPC)
    • Body Control Module (BCM)
    • Powertrain Control Module (PCM)
    • Inflatable Restraint Sensing and Diagnostic Module (SDM)
    • Electronic Brake Control Module (EBCM)

Does the scan tool communicate with the control modules listed above?

Go to Step 3

Go to Scan Tool Does Not Communicate with Class 2 Device in Data Link Communications

3

Select the display DTCs function on the scan tool for the following control modules:

    • Instrument Panel Cluster (IPC)
    • Body Control Module (BCM)
    • Powertrain Control Module (PCM)
    • Inflatable Restraint Sensing and Diagnostic Module (SDM)
    • Electronic Brake Control Module (EBCM)

Does the scan tool display any DTCs for the control modules listed above?

Go to Step 4

Go to Symptoms - Instrument Cluster

4

Does the scan tool display any DTCs which begin with a "U"?

Go to Scan Tool Does Not Communicate with Class 2 Device in Data Link Communications

Go to Step 5

5

Does the scan tool display DTC B1000?

Go to Diagnostic Trouble Code (DTC) List/Type in Body Control System

Go to Step 6

6

Does the scan tool display B1328?

Go to Diagnostic Trouble Code (DTC) List/Type in Engine Electrical

Go to Diagnostic Trouble Code (DTC) List/Type