LEMON Manuals: Even more car manuals for everyone
Home >> Pontiac >> 2006 >> G6 Base, 2.4 B >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System - 2.4L - DTC P0010 To DTC P0341 >> DTC P0117 or P0118 >> Circuit/System Testing >> DTC P0118

DTC P0118

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