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Home >> GMC >> 2006 >> Sierra 1500 HD, RWD >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 25 (ENGINE CONTROLS - 6.6L - DIAGNOSIS (DTCs P0016-P0401)) >> DTC P0116 >> Circuit/System Testing

Circuit/System Testing

WARNING: This page is about a different variant/trim than selected.
  1. Disconnect the ECT sensor.
  2. Turn ON the ignition, with the engine OFF.
  3. Measure for the proper voltage range of 4.9-5.2 volts between the ECT signal circuit and a good ground with a DMM.
    • If the voltage is less than 4.9 volts, test the ECT sensor signal circuit for a high resistance short to ground or a faulty ECM.
  4. Remove and test the ECT sensor. Refer to Component Testing .
    • If the resistance measurements of the ECT sensor are out of range, replace the sensor.
    • If the ECT sensor tests normal and the DTC continues to set, replace the ECM.
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