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Home >> Chevrolet >> 2011 >> Traverse LS, AWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 75 (Engine Control System & Fuel System - 2.8L, 3.0L - DTC P0008 To DTC P0118) >> DTC P0116 (LF1) >> Circuit/System Testing

Circuit/System Testing

WARNING: This page is about a different car, the 2010 Cadillac SRX. 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 ECT sensor.
    2. CAUTION: Do NOT use a test lamp to test the continuity of the circuit. Damage to the control module may occur due to excessive current draw.
    NOTE: The control module or the sensor may be damaged if the circuit is shorted to battery positive voltage.
  2. Test for less than 5 Ω between the low reference circuit terminal A and ground.
    • If greater than the specified range, test the low reference circuit for an open/high resistance, or for a short to voltage. If the circuit tests normal, replace the K20 ECM.
  3. Ignition ON, verify that the scan tool ECT sensor parameter is at -40°C (-40°F).
    • If warmer than the specified value, test the signal circuit for a short to ground. If the circuit tests normal, replace the K20 ECM.
    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. Ignition ON, install a 3 A fused jumper wire between the signal circuit terminal A and the low reference circuit terminal B. Verify the ECT sensor parameter is warmer than 142°C (288°F).
    • If colder than the specified value, test the signal circuit for a short to voltage or an open/high resistance. If the circuit tests normal, replace the K20 ECM.
  5. If all circuits test normal, test or replace the B34 ECT sensor.
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