Self-Diagnostic System Check - Analog Cluster

The "Self-Diagnostic System Check" is an organized approach for identifying a problem caused by the on-car computer-controlled electronics. Understanding this chart and using it correctly will reduce diagnosis time and prevent the unnecessary replacement of parts.

Notes on Trouble Trees
1. This procedure is specific for the Analog Instrument Panel Cluster (IPC), if the vehicle is equipped with a Digital IPC the Digital procedure must be referenced.
2. This process assures that there are no BCM Inputs active that would not allow the system to "wake-Up" In an incorrect sequence.
3. If the IPC Voltmeter displays no system voltage and the Driver Information Center (DIC) has some display then the system is "awake" and there is a communication problem.
4. If the IPC Voltmeter displays no system voltage and the DIC has no display (is black or not lit) Chart B-1 must be referenced. Chart B-1
5. This checks that the ECM is In control of the "Engine Control System Fault" light.
6. If the IPC Voltmeter displays system voltage, and the ECSF light works - Enter diagnostics and continue with code diagnosis chart. If diagnostics cannot be entered refer to Chart C-1. Chart C-1 Vehicle Will Not Enter Diagnostics
7. If no codes are set refer to symptoms noted for the effected system. Testing and Inspection