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Home >> Dodge and Ram >> 2003 >> Durango Base, 4.7 N, 4WD, Part Time >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - Self-Diagnostics - 4.7L >> Diagnostic Tests >> DTC P0107: Map Sensor Circuit Low >> Testing

DTC P0107: Map Sensor Circuit Low: Testing

  1. Ignition on, engine not running. With the DRBIII® scan tool, read and record the related freeze frame data. With the DRBIII® scan tool, read the MAP sensor voltage. Is the voltage below 0.08 of a volt? If yes, go to next step. If no, see INTERMITTENT CONDITION  under SELF-DIAGNOSTIC SYSTEM.
  2. Turn the ignition off. Disconnect the MAP sensor harness connector. Turn the ignition on, engine not running. Measure the voltage of the (K6) 5-volt supply circuit in the MAP sensor harness connector. Is the voltage 4.5-5.2 volts. If yes, go to next step. If no, go to step  6.
  3. With the DRBIII® scan tool, monitor the MAP sensor voltage with the sensor harness connector disconnected. Is the voltage above 1.2 volts? If yes, replace the MAP sensor. If no, go to next step.
  4. Turn the ignition off. Disconnect the PCM harness connectors. Measure the resistance between ground and the (K1) MAP signal circuit at the MAP sensor harness connector. Is the resistance below 100 ohms? If yes, repair the (K1) MAP sensor signal circuit for a short to ground. If no, go to next step.
  5. Measure the resistance between the (K1) MAP signal circuit and the (K4) sensor ground circuit in the MAP sensor harness connector. Is the resistance below 100 ohms? If yes, repair the (K1) MAP sensor signal circuit for a short to the (K4) MAP sensor ground circuit. If no, go to step  8.
    6. CAUTION: Do not probe the PCM harness connectors. Probing the PCM harness connectors will damage the PCM terminals resulting in poor terminal to pin connection. Install Miller Special Tool (8815) to perform diagnosis.
  6. Turn the ignition off. Disconnect the MAP sensor harness connector. Disconnect the PCM harness connectors. Measure the resistance of the (K6) 5-volt supply circuit between the MAP sensor harness connector and the PCM harness connector. Is the resistance below 5.0 ohms? If yes, go to next step. If no, repair the (K6) 5-volt supply circuit for an open.
  7. Measure the resistance between ground and the (K6) 5-volt supply circuit in the MAP sensor harness connector. Is the resistance below 100 ohms? If yes, repair the (K6) 5-volt supply circuit for a short to ground. If no, go to next step.
    8. NOTE: Before continuing, disconnect the PCM harness connectors and check the related wiring terminals for corrosion, damage or terminal push out. Repair as necessary.
  8. Using the wiring diagram as a guide, inspect the wire harness and connectors. Pay particular attention to all power and ground circuits. If there are no possible causes remaining, replace and program the PCM. See PROGRAMMING .
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