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Test A: Engine Coolant Temperature Gauge Inaccurate Or Inoperative

  1. If Instrument Panel Cluster (IPC) diagnostic system check has been performed, go to next step. If IPC diagnostic system check has not been performed, see INSTRUMENT PANEL CLUSTER DIAGNOSTIC SYSTEM CHECK  under SELF-DIAGNOSTIC SYSTEM.
  2. Turn ignition switch to OFF position. Connect scan tool to Data Link Connector (DLC). Turn ignition switch to ON position. Using scan tool, perform COOLANT GAUGE SWEEP TEST. If engine coolant temperature gauge moves up and down when commanded, system is functioning properly at this time. Check wiring and connectors for possible intermittent fault. See WIRING DIAGRAMS  . If engine coolant temperature gauge does not respond to scan tool, go to next step.
  3. Replace IPC. See INSTRUMENT PANEL CLUSTER  under REMOVAL & INSTALLATION. When repair is complete, go to next step.
  4. Operate system to verify normal operation. If engine coolant temperature gauge indicates normally, repair is complete. If engine coolant temperature gauge is inaccurate or inoperative, go to step  2 .
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