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Test V: Low Engine Coolant Indicator Always On

NOTE: Cooling fluid minimum capacity sensor can also be referred to as low coolant level switch.
  1. If instrument panel cluster diagnostic system check has been performed, go to next step. If instrument panel cluster diagnostic system check has not been performed, go to INSTRUMENT PANEL CLUSTER DIAGNOSTIC SYSTEM CHECK  under SELF-DIAGNOSTIC SYSTEM.
  2. Verify that engine coolant is properly filled. Turn ignition switch to RUN position, and observe low coolant level indicator. If LOW ENGINE COOLANT indicator illuminates, go to next step. If LOW ENGINE COOLANT indicator does not illuminate, concern may be intermittent. See PROBLEM DIAGNOSIS  under INTERMITTENTS.
  3. Turn ignition switch to OFF position. Disconnect cooling fluid minimum capacity sensor 2-pin harness connector. Cooling fluid minimum capacity sensor is located on right side of engine compartment, in bottom of coolant overflow bottle. Connect a 3-amp fused jumper wire between cooling fluid minimum capacity sensor harness connector terminals "A" (Black wire) and "B" (Brown/Black wire). Turn ignition switch to RUN position. Observe LOW ENGINE COOLANT on instrument cluster. If indicator does not illuminate, go to next step. If indicator illuminates, go to step  6 .
  4. Check for poor, loose or corroded terminals in cooling fluid minimum capacity sensor. If no problem is found, go to next step. If problem is found, repair as necessary and go to step  10 .
  5. Replace cooling fluid minimum capacity sensor. After repairs are made, go to step  10 .
  6. Check for open in cooling fluid minimum capacity sensor circuit (Brown/Blue wire) between gauge cluster harness connector C2 terminal No. 3 and cooling fluid minimum capacity sensor harness connector terminal "B". See WIRING DIAGRAMS  . If no problem is found, go to next step. If problem is found, repair as necessary and go to step  10 .
  7. Check for open in cooling fluid minimum capacity sensor ground circuit (Black wire) between ground and cooling fluid minimum capacity sensor harness connector terminal "A". Ground point is located under battery tray. If no problem is found, go to next step. If problem is found, repair as necessary and go to step  10 .
  8. Check for poor, loose or corroded terminals in IPC harness connector. If no problem is found, go to next step. If problem is found, repair as necessary and go to step  10 .
  9. Replace IPC. See INSTRUMENT PANEL CLUSTER  under REMOVAL & INSTALLATION. After repairs are made, go to next step.
  10. Connect all harness connectors and components that were disconnected. Operate system to verify repair. If system is operates normally, testing is complete. If system does not operate normally, go to step  2 .
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