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Home >> GMC >> 2017 >> Terrain SL, Gas >> Repair and Diagnosis >> Accessories & Equipment >> Gauges & Instrument Panels >> Instrument Panel System Displays And Gauges >> Diagnostic Information and Procedures >> Outside Air Temperature Display Inaccurate or Inoperative >> Circuit/System Testing

Circuit/System Testing

NOTE:

Circuit/System Verification must be performed before proceeding with Circuit/System Testing.

  1. Ignition OFF, disconnect the harness connector at the B9 Ambient Air Temperature Sensor.
  2. Ignition ON, test for 4.8 - 5.2 V between the signal circuit terminal A and ground.
    • If greater than the specified range, test the signal circuit for a short to voltage. If the circuit tests normal, replace the P16 Instrument Cluster.
    • If less than the specified range, test the signal circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the P16 Instrument Cluster.
  3. Install a 3 A fused jumper wire between the signal circuit terminal A and the low reference circuit terminal B. Verify the scan tool Ambient Air Temperature Sensor parameter displays 0%.
    • If greater than the specified value, test the low reference circuit a short to voltage or an open/high resistance. If the circuit tests normal, replace the P16 Instrument Cluster.
  4. Verify the accuracy of the B9 Ambient Air Temperature Sensor. Refer to Ambient Air Temperature Sensor Resistance .
    • If not within the specified range, replace the B9 Ambient Air Temperature Sensor.
  5. If all circuits test normal, test the P16 Instrument Cluster.
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