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Sensor Calibration

  1. If an ambient or in-car temperature sensor is suspected, disconnect sensor, and take a resistance reading across sensor terminals. If resistance reading is not within 5% of ideal curves indicated in graph, replace sensor. See Fig 1.
    NOTE: Resistance readings may vary by 5% from ideal.
    Fig 1: Checking Sensor Resistance Readings
    G16528Courtesy of GENERAL MOTORS CORP.
  2. If resistance is within specification, check continuity of wires from control panel to sensors. If wires are OK, control panel is defective.
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