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Diagnostic Aids

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  1. 1) DTC 0107: BARO Circuit Low Input

    This DTC indicates BARO sensor circuit low input was detected during KOEO SELF-TEST  or during continuous diagnostic monitoring. Possible causes for this DTC are:
    • Biased BARO sensor/PCM.
    • Open BARO or VREF sensor circuit.
    • Shorted SIG RTN or PWR GND circuit.
    • Faulty PCM.

    Turn ignition off. Disconnect BARO sensor connector. Sensor is located below instrument panel, at base of steering column. Turn ignition on. Measure voltage between ground and Brown/White wire at BARO sensor wiring harness connector. If voltage is 4.5-5.5 volts, go to next step. If voltage is not 4.5-5.5 volts, locate and repair open circuit in Brown/White wire. Clear DTCs, and repeat QUICK TEST .

  2. 2) Check SIG RTN Circuit

    Measure voltage between Gray/Red wire and Brown/White wire at BARO sensor wiring harness connector. If voltage is 4.5-5.5 volts, go to next step. If voltage is not 4.5-5.5 volts, locate and repair open circuit in Gray/Red wire. Clear DTCs, and repeat QUICK TEST .

  3. 3) Check BARO Signal Circuit

    Turn ignition off. Disconnect PCM 104-pin connector, and inspect for damaged pins, corrosion and loose wires. Repair as necessary. Install Breakout Box (014-00950), leaving PCM disconnected. Measure resistance between Dark Blue/Light Green wire at BARO sensor wiring harness connector and test pin No. 38 at breakout box. If resistance is less than 5 ohms, go to next step. If resistance is 5 ohms or more, locate and repair open circuit in Dark Blue/Light Green wire. Clear DTCs, and repeat QUICK TEST .

  4. 4) Check VREF Circuit

    Measure resistance between Brown/White wire at BARO sensor wiring harness connector and test pin No. 90 at breakout box. If resistance is less than 5 ohms, go to next step. If resistance is 5 ohms or more, locate and repair open circuit in Brown/White wire. Clear DTCs, and repeat QUICK TEST .

  5. 5) Check SIG RTN Circuit

    Measure resistance between Gray/Red wire at BARO sensor wiring harness connector and test pin No. 91 at breakout box. If resistance is less than 5 ohms, go to next step. If resistance is 5 ohms or more, locate and repair open circuit in Gray/Red wire. Clear DTCs, and repeat QUICK TEST .

  6. 6) Check For Grounded Signal Circuit

    Measure resistance between test pin No. 84 and test pins No. 25, 51, 76, 77, 91 and 103 at breakout box. If all readings are more than 10 k/ohms, go to next step. If any reading is 10 k/ohms or less, locate and repair short to ground in Dark Blue/Light Green wire (BARO signal circuit). Clear DTCs, and repeat QUICK TEST .

  7. 7) Check For Grounded Signal Circuit

    Connect PCM connector to breakout box. Measure resistance between test pin No. 84 and test pins No. 25, 51, 76, 77, 91 and 103 at breakout box. If all readings are more than 10 k/ohms, replace BARO sensor. Clear DTCs, and repeat QUICK TEST . If any reading is 10 k/ohms or less, replace PCM. Clear DTCs, and repeat QUICK TEST .

  8. 8) DTC 0108: BARO Circuit High Input

    This DTC indicates BARO sensor circuit high input was detected during KOEO SELF-TEST  or during continuous diagnostic monitoring. Possible causes for this DTC are:
    • Biased BARO sensor/PCM.
    • BARO sensor circuit shorted to VREF circuit.

    Turn ignition on. Disconnect BARO sensor connector. Sensor is located below instrument panel, at base of steering column. Perform KOEO SELF-TEST . If DTC 0107 is present, replace BARO sensor. Clear DTCs, and repeat QUICK TEST . If DTC 0107 is not present, go to next step.

  9. 9) Check For Short To Power

    Turn ignition off. Disconnect PCM 104-pin connector, and inspect for damaged pins, corrosion and loose wires. Repair as necessary. Install Breakout Box (014-00950), leaving PCM disconnected. Measure resistance between test pin No. 84 and test pins No. 55, 71, 90 and 97 at breakout box. If all readings are more than 10 k/ohms, replace PCM. Clear DTCs, and repeat QUICK TEST . If any reading is 10 k/ohms or less, locate and repair short to power in Dark Blue/Light Green wire. Clear DTCs, and repeat QUICK TEST .
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