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Home >> Chevrolet >> 2010 >> Traverse LT, AWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 517 (Engine Controls And Fuel - 3.6L (LLT) - DTC P0010 To DTC P0336) >> Diagnostic Information and Procedures >> DTC P0119: Engine Coolant Temperature (ECT) Sensor Circuit Intermittent >> Circuit/System Testing

Circuit/System Testing

WARNING: This page is about a different car, the 2016 GMC Acadia, 2016 Chevrolet Traverse, and 2016 Buick Enclave. However, it is still accessible from the selected car via links, so may be relevant.
  1. Ignition OFF, disconnect the harness connector at the B34 engine coolant temperature sensor.
  2. Vehicle OFF, all systems OFF. It may take up to 2 minutes for all vehicle systems to power down. Test for less than 5 Ω between the low reference circuit terminal 2 and ground.
    • If greater than the specified range, test the low reference circuit for an open/high resistance. If the circuit tests normal, replace the K20 engine control module.
  3. Ignition ON, verify the scan tool ECT Sensor parameter is colder than -39°C (-38°F).
    • If warmer than the specified range, test the signal circuit terminalfor an open/high resistance, or for a short to voltage. If the circuit tests normal, replace the K20 engine control module.
    4. NOTE:

    If the fuse in the jumper wire opens, the signal circuit is shorted to a voltage and the sensor may be damaged.

  4. Install a 3 A fused jumper wire between the signal circuit terminal 1 and the low reference circuit terminal 2. Verify the scan tool ECT Sensor parameter is warmer than 140°C (284°F).
    • If colder than the specified range, test the signal circuit for a short to voltage or an open/high resistance. If the circuit tests normal, replace the K20 engine control module.
  5. If the circuits test normal, test or replace the B34 engine coolant temperature sensor.
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