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Home >> Mazda >> 2002 >> Tribute LX, 4WD >> Repair and Diagnosis >> External Pages >> Different car >> Section 48 (Engine Controls - Self-Diagnostics) >> Diagnostic Tests >> DTC P0704 Or DTC P1709 >> Diagnostic Procedures

Diagnostic Procedures

WARNING: This page is about a different car, the 2002 Mazda B4000, 2002 Mazda B3000, and 2002 Mazda B2300. 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.
    NOTE: During KOEO Self-Test, clutch pedal must be depressed for M/T or gear shift must be in Neutral for A/T.

  2. Check CPP/PNP Switch Function

    With KOEO, access CPP/PNP PID and observe PID cycling on/off with clutch pedal up, then depressed (M/T). If CPP/PNP PID changes from on to off, fault is intermittent. Disconnect PCM connector. Inspect connector for damaged or pushed out pins, corrosion or loose wires. Repair as necessary. If connector is okay, replace faulty PCM. Go to step  6 . If CPP/PNP PID did 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 for and bracket for damage. Repair as necessary. Disconnect CPP switch harness connector. Inspect for damage. Repair as necessary. Measure resistance across CPP switch terminals with clutch pedal depressed. See Fig 1 . If resistance is less than 5 ohms, go to next step. If resistance is 5 ohms or more, replace CPP switch. Go to step  6 .
    Fig 1: Identifying CPP Switch Connector Circuits
    G00155551Courtesy of MAZDA MOTORS CORP.

  4. Check Resistance Of CPP Circuit

    Disconnect scan tool. Disconnect PCM connector. Install breakout box, leaving PCM disconnected. Measure resistance of CPP circuit (Light Blue/Yellow wire) between breakout box terminal No. 64 and CPP switch harness connector. See Fig 1 . Record reading. Measure resistance of SIG RTN circuit (Gray/Red wire) between breakout box terminal No. 91 and CPP switch harness connector. See Fig 1 . Record reading. If either resistance is less than 5 ohms, go to next step. If either resistance is 5 ohms or more, repair appropriate open circuit. See WIRING DIAGRAMS article. Go to step  6 .

  5. Check CPP Circuit For Short

    Measure resistance between breakout box terminals No. 64 (CPP circuit) and 91 (SIG RTN circuit). Record reading. Measure resistance between breakout box terminals No. 64 (CPP circuit) and chassis ground. Record reading. If each resistance reading is more than 10,000 ohms, replace faulty PCM. Remove breakout box. Reconnect all connectors. Go to next step. If each resistance reading is 10,000 ohms or less, repair short circuit. See WIRING DIAGRAMS article. Go to next step.

  6. Verify Trouble Shooting Of DTCs Completed

    Reconnect all electrical connectors. Perform QUICK TEST  under SELF-DIAGNOSTIC SYSTEM. If same DTC is present, replace faulty PCM. Repeat QUICK TEST  under SELF-DIAGNOSTIC SYSTEM. If any other DTC is present, go to applicable procedure for other DTCs. See DIAGNOSTIC TROUBLE CODE DEFINITIONS  . If no DTCs are set, trouble shooting is complete.
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