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Diagnostic Procedures

  1. Perform POWERTRAIN ON-BOARD DIAGNOSTIC (OBD) SYSTEM CHECK . Read and record FREEZE FRAME and/or FAIL RECORDS data for each DTC set. After performing OBD system check, go to next step.
  2. Turn ignition on. Using scan tool, observe OIL LIFE SWITCH. If scan tool displays PRESSED, go to next step. If scan tool does not display PRESSED, see DIAGNOSTIC AIDS.
  3. Turn ignition off. Disconnect PCM connectors. Turn ignition on. Connect a test light between battery voltage and PCM harness connector OLM reset circuit. If test light illuminates, go to next step. If test light does not illuminate, go to step 6)
  4. Disconnect OLM reset switch. Connect a test light between battery voltage and PCM harness connector OLM reset circuit. If test light illuminates, go to next step. If test light does not illuminate, go to step 7)
  5. Locate and repair short to ground in OLM reset circuit. After repairs, go to step 8).
  6. Replace PCM. Program replacement PCM using required equipment. After replacing PCM, go to step 8).
  7. Replace OLM reset switch. After replacing switch, go to next step.
  8. Turn ignition on. Using scan tool, observe OIL LIFE SWITCH. If scan tool displays PRESSED, return to step 3). If scan tool does not display PRESSED, repair is complete.
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