Engine Coolant Temperature Gage Inaccurate or Inoperative

Engine Coolant Temperature Gage Inaccurate or Inoperative

Diagnostic Fault Information

Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure. Initial Inspection and Diagnostic Overview

Circuit/System Description

The instrument panel cluster (IPC) displays the engine coolant temperature as determined by the powertrain control module (PCM) or the engine control module (ECM). The IPC receives a serial data message from the PCM/ECM indicating the engine coolant temperature. The IPC uses the PCM/ECM coolant temperature information to determine the coolant temperature gage display.

Circuit/System Testing

1. Ignition ON, scan tool installed, perform the instrument panel cluster (IPC) scan tool Special Functions Lamp and Gage Check.

• If the engine coolant temperature gage does not sweep from its low to high position, replace the IPC.

Repair Instructions

Perform the Diagnostic Repair Verification after completing the diagnostic procedure. Verification Tests

Control Module References for IPC replacement, setup, and programming