GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Pontiac 🢒 2004 🢒 GTO 🢒 Engine 🢒 Engine Controls - 5.7L 🢒 Diagnostic System Check - Instrument Cluster

Test Description

The numbers below refer to the step numbers 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 in Symptoms will determine the correct diagnostic procedure to use.

Step

Action

Yes

No

Schematic Reference: Instrument Cluster Schematics

1

Install a scan tool.

Does the scan tool power up?

Go to Step 2

Scan Tool Does Not Power Up

2

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

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

Go to Step 3

Scan Tool Does Not Communicate with Class 2 Device

3

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

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

Does the scan tool display any DTCs?

Go to

Diagnostic Trouble Code (DTC) List

Symptoms - Instrument Panel, Gages and Console