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Test E: Engine Coolant Temperature Gauge Inaccurate Or Inoperative

  1. If IPC diagnostic system check was performed, go to next step. If IPC diagnostic system check was not performed, go to INSTRUMENT PANEL CLUSTER DIAGNOSTIC SYSTEM CHECK  under SELF-DIAGNOSTIC SYSTEM. After performing IPC diagnostic system check, go to next step.
  2. Using scan tool, select IPC SPECIAL FUNCTIONS and perform gauge sweep. See SCAN TOOL  under SELF-DIAGNOSTIC SYSTEM. If coolant temperature gauge responds as commanded, problem is intermittent, go to INTERMITTENT TROUBLE CODE DETERMINATION in BODY CONTROL MODULES - CORVETTE article. If coolant temperature gauge does not respond as commanded, go to next step.
  3. Replace IPC. See INSTRUMENT PANEL CLUSTER  under REMOVAL & INSTALLATION. After repairs, go to next step.
  4. Recheck system operation to verify the repair. If system operates properly, repair is complete. If system does not operate properly, go to step  2 .
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