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Home › Mercury › 1989 › Tracer 2D Hatchback, Standard › Repair and Diagnosis › Engine Performance › System › Tests W/Codes - MPFI › Determining Codes To Test › KOER Self-Test Procedures

KOER Self-Test Procedures

  1. Connect STAR tester or volt/ohmmeter as described in EQUIPMENT HOOK-UP. Start engine and run until operating temperature is reached.
  2. Activate self-test and wait 2 minutes. Deactivate and reactivate self-test. DO NOT turn off engine. System is now in Engine Running "CONTINUOUS MONITOR" Mode.
  3. Tap, move and wiggle the suspect sensor and/or harness. If a fault is detected, a service code will be stored and indicated. Refer to FAULT CODE/TEST MENU to find the proper test procedure.
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