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Home >> Chevrolet >> 2012 >> Traverse LS, AWD >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls/Fuel - 3.6L - DTC P0010 To DTC P0338 >> Diagnostic Information and Procedures >> DTC P0119 >> Circuit/System Testing
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Circuit/System Testing

  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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