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Home >> Pontiac >> 2010 >> Vibe Base, 1.8 8, Standard >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System & Fuel System - 1.8L (Lay) - DTC P0010 To DTC P0420/P043F >> DTC P011B >> Circuit/System Testing

Circuit/System Testing

  1. Ignition ON, compare the scan tool start up IAT sensor parameter and the start up ECT sensor parameter to the ambient air temperature when the DTC set. This will aid in determining which sensor set the DTC.
  2. Ignition OFF, disconnect the harness connector at the appropriate sensor.
  3. Test for less than 10 Ω between the low reference circuit terminal 2 and ground G104.
    • 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 PCM.
  4. Ignition ON, verify that the 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 PCM.
  5. Install a 3 A fused jumper wire between the signal circuit terminal 1 and ground. Verify the scan tool sensor parameter is greater than 139°C (280°F).
    • If less 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 PCM.
  6. If all circuits test normal, test or replace the sensor.
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