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Home >> Mazda >> 2002 >> Tribute LX, 4WD >> Repair and Diagnosis >> Engine Performance >> Testing & Diagnosis >> Engine Controls - Self-Diagnostics >> Diagnostic Tests >> DTC P0704 Or DTC P1709 >> 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.
    NOTE: During KOEO self-test, clutch pedal must be down for manual transaxle.

  2. Check CPP Switch Function

    Turn ignition on, engine off. Access CPP PID and observe PID cycling ON/OFF with clutch pedal up, then down (M/T). If CPP PID reading changes from ON to OFF, problem is intermittent. Inspect both ends or PCM 104-pin harness connector for pushed out terminals, corrosion and loose wires. Repair as necessary. If connector is okay, replace PCM. If CPP PID reading does not change from ON to OFF, go to next step.

  3. Check CPP Switch

    Turn ignition off. Locate CPP switch near clutch pedal. Inspect switch and bracket for damage, bent or broken conditions. Repair as necessary. Disconnect CPP harness connector and inspect for damage, pushed out or broken pins and broken wires. Repair as necessary. Measure resistance across CPP switch terminals with clutch pedal down. If resistance reading is less than 5.0 ohms, go to next step. If resistance reading is not as specified, replace CPP switch. After repair, go to step  6.

  4. Check Resistance Of CPP Circuit

    Disconnect scan tool. Disconnect PCM 104-pin harness connector. Connect Breakout Box (49-UN01-130) to PCM harness connector only. See Figure. Measure resistance of CPP circuit between breakout box terminal No. 64 and CPP switch harness connector (Light Blue/Yellow wire). If resistance reading is less than 5.0 ohms, go to next step. If resistance reading is not as specified, replace CPP switch. After repair, go to step  6.

  5. Check CPP Circuit For Short

    Measure resistance between breakout box terminals No. 64 (CPP) and No. 91 (SIG RTN). Measure resistance between ground and breakout box terminal No. 64 (CPP). If each resistance reading is more than 10,000 ohms, go to next step. If each resistance reading is not as specified, repair short circuit. See WIRING DIAGRAMS article. After repair, go to next step.

  6. Verify Trouble Shooting Of DTCs Completed

    Reconnect all disconnected connectors. Clear DTCs from PCM memory using scan tool. Perform QUICK TEST  under SELF-DIAGNOSTIC SYSTEM. If same DTC is present, replace faulty 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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