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Diagnostic Procedures

WARNING: This page is about a different car, the 2003 Mazda Tribute. However, it is still accessible from the selected car via links, so may be relevant.
  1. If QUICK TEST was not performed, go to QUICK TEST  under SELF-DIAGNOSTIC SYSTEM. If QUICK TEST was performed, go to next step.
  2. Check CMP Sensor Output -  Disconnect PCM 104-pin harness connector. Connect Breakout Box (49-UN01-130) to PCM harness connector and PCM. See Figure. Start engine and vary engine RPM. Measure voltage between breakout box terminal No. 85 (CMP) and terminal No. 103 (PWR GND). If AC voltage reading varies more than 0.1 volt, verify correct installation of CMP sensor. If CMP sensor installation is correct, replace PCM. After repair, go to next step.
  3. Verify Troubleshooting Of DTCs Completed -  Make sure to reconnect all disconnected connectors. Clear DTCs from PCM memory using scan tool generic OBD-II function. Perform FUEL OR MISFIRE MONITOR REPAIR VERIFICATION DRIVE CYCLE  under MONITOR REPAIR VERIFICATION DRIVE CYCLES. If same DTC is present, replace PCM. Repeat QUICK TEST  under SELF-DIAGNOSTIC SYSTEM. If same DTC is not present, go to applicable procedure for other DTCs. See DIAGNOSTIC TROUBLE CODE DEFINITIONS . If no DTCs are present, trouble shooting is complete.
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