Description & Operation: Notes

WARNING: Deactivate air bag system before performing any service operation. See appropriate AIR BAG RESTRAINT SYSTEMS article. DO NOT apply electrical power to any component on steering column without first deactivating air bag system. Air bag may deploy.

NOTE: Platform Zone Module (PZM) is also identified as Body Control Module (BCM).

Instrument Panel Cluster (IPC) consists of analog temperature, fuel, tachometer and speedometer gauges. See Fig 1 . IPC has capability to diagnose malfunctions in various sensors, input switches, components and systems. When IPC or other microprocessor-controlled module detects a malfunction, it may turn on an IPC indicator or request/display a message to Driver Information Center (DIC) to alert driver that a malfunction has occurred. Some indicator lights and IPC messages have dual controls.

IPC contains 2 microprocessors as part of the instrument panel assembly. IPC can recognize operational malfunctions, alert driver through indicators or Driver Information Center (DIC) messages, and store DTCs which identify malfunction areas. See WARNING MESSAGES .

Fig 1: View Of Instrument Panel Cluster

Courtesy of GENERAL MOTORS CORP.