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Test W: Engine Oil Temperature Indicator Always On

  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. Verify high oil temperature message is present on Driver's Information Center (DIC). If high oil temperature message is not present, problem may be intermittent. To diagnose intermittent, go to INTERMITTENT TROUBLE CODE DETERMINATION in BODY CONTROL MODULES - CORVETTE article. If high oil temperature message is present, go to next step.
  3. Connect scan tool to Data Link Connector (DLC). Turn ignition on. Select IPC DATA 1 data list and monitor OIL TEMP. If oil temperature is less than 320°F (160°C), go to next step. If oil temperature is more than 320°F (160°C), go to step  5 .
  4. Replace IPC. See INSTRUMENT PANEL CLUSTER  under REMOVAL & INSTALLATION. After repairs, go to step  7 .
  5. Turn ignition off. Disconnect IPC connector. See INSTRUMENT PANEL CLUSTER  under REMOVAL & INSTALLATION. Check for high resistance in Dark Gray/White wire between IPC connector terminal A10 and engine oil temperature sensor. See Figure and Figure . Repair as necessary. After repairs, go to step  7 . If circuit is okay, go to next step.
  6. Replace engine oil temperature sensor. After repairs, go to next step.
  7. Recheck system operation to verify the repair. If system operates properly, repair is complete. If system does not operate properly, go to step  3 .
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