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Engine Coolant Temperature Indicator Always On

  1. Did you perform the DIAGNOSTIC SYSTEM CHECK - ENGINE COOLING? If so, go to next step. If not, go to DIAGNOSTIC SYSTEM CHECK - ENGINE COOLING  under SELF-DIAGNOSTIC.
  2. Start the engine. Does the engine coolant temperature indicator illuminate? If so, go to next step. If not, see INTERMITTENTS  in SYMPTOMS - ENGINE COOLING under TROUBLE SHOOTING.
  3. With the scan tool, observe the ENGINE COOLANT TEMPERATURE PARAMETER in the Powertrain Control Module (PCM) or Engine Control Module (ECM) data list. Does the scan tool indicate that the coolant temperature is within the temperature range shown on the temperature gage? If so, go to ENGINE OVERHEATING  . If not, go to next step.
  4. Replace the IPC. See appropriate GAUGES & INSTRUMENT PANELS article in ACCESSORIES & EQUIPMENT. After repairs are complete, go to next step.
  5. Operate the system in order to verify the repair. Did you correct the condition? If so, then system is okay. If system is not okay, go to  2 .
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