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Home >> Mazda >> 2002 >> Tribute LX, 4WD >> Repair and Diagnosis >> Engine Performance >> Testing & Diagnosis >> Engine Controls - Self-Diagnostics >> Diagnostic Tests >> DTC P1309: Misfire Detection Monitor - Disabled >> Diagnostic Procedures

Diagnostic Procedures

  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. If AC voltage reading does not vary more than 0.1 volt, replace CMP sensor.

  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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