FixVault
Home › Pontiac › 2006 › Solstice Automatic › Repair and Diagnosis › Engine Performance › System › Engine Controls - 2.4L - DTC P0010 To DTC P0340 › DTC P0112 or P0113 › Circuit/System Testing

Circuit/System Testing

DTC P0112

  1. Turn ON the ignition, with the engine OFF.
  2. Disconnect the IAT sensor.
  3. Observe the IAT Sensor parameter with a scan tool.
    • If the IAT Sensor parameter is less than -39°C (-38°F), then replace the IAT sensor.
    • If the IAT Sensor parameter is more than 149°C (300°F), then test the IAT sensor signal circuit for a short to ground.
    • If the IAT sensor signal circuit tests normal, then replace the ECM.

DTC P0113

  1. Turn ON the ignition, with the engine OFF.
  2. Disconnect the IAT sensor.
  3. Measure for the proper range of 4.9-5.2 volts between the IAT sensor signal circuit and a good ground with a DMM.
    • If the voltage is less than 4.9 volts, test the IAT sensor signal circuit for a high resistance or an open circuit.
    • If the voltage is more than 5.2 volts, test the IAT sensor signal circuit for a short to voltage.
    • If the IAT sensor signal circuit tests normal, and the voltage is still not within the proper range, then replace the ECM.
  4. Turn OFF the ignition, and all electrical accessories. Allow sufficient time for all of the control modules to power down before taking a resistance measurement.
  5. Measure for a proper value of less than 5 ohms of resistance between the IAT low reference circuit and a good ground.
    • If the resistance is more than 5 ohms, test the low reference circuit for a high resistance, an open circuit, or a faulty ECM.
  6. Turn ON the ignition, with the engine OFF.
  7. Observe the IAT Sensor parameter while connecting and disconnecting a 3-amp fused jumper wire between the IAT sensor signal and low reference circuits. This should cause the IAT Sensor parameter to toggle between the upper and lower temperature limits.
    • If the IAT Sensor parameter does not toggle, replace the ECM.
    • If the IAT Sensor parameter does toggle, then test the IAT sensor signal circuit for a short to another 5-volt reference circuit.
    • If the IAT sensor signal circuit is not shorted to another 5-volt reference circuit, then replace the IAT sensor.
About FixVault