Captiva |
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• | Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure. |
• | Review Strategy Based Diagnosis for an overview of the diagnostic approach. |
• | Diagnostic Procedure Instructions provides an overview of each diagnostic category. |
Circuit | Short to Ground | Open/High Resistance | Short to Voltage | Signal Performance |
---|---|---|---|---|
Ambient Air Temperature Sensor Signal | B0158 02 | B0158 05 | B0158 05 | -- |
Low Reference | -- | B0158 05 | B0158 05 | -- |
The instrument cluster monitors the ambient air temperature sensor with a low reference circuit and 5 V signal circuit. The instrument cluster monitors the voltage drop across the sensor, which is proportional to temperature. When the ambient air temperatures are cold, the resistance of the sensor is high and the voltage signals are high. When the ambient air temperatures are hot, the resistance of the sensors is low and the voltage signals are low. The instrument cluster converts the voltage value to a temperature value of Celsius or Fahrenheit that will be displayed by the driver information centre.
The system voltage is between 9–16 V.
The instrument cluster detects the sensor signal circuit is more than 88°C (190°F).
The instrument cluster detects the sensor signal circuit is less than -40°C (-40°F).
The instrument cluster uses a default air temperature value for further calculations. The driver information centre displays ---°C ( ---°F).
The DTC will become history if the instrument cluster no longer detects a malfunction.
Driver Information System Schematics
Instrument Cluster Description and Operation
Control Module References for scan tool information
Ignition ON, observe the scan tool Outside Air Temperature parameter. The reading should be between -40°C (-40°F) to +88°C (+190°F) and change with air temperature changes.
⇒ | If less than the specified range, test the low reference circuit a short to voltage or an open/high resistance. If the circuit tests normal, replace the instrument cluster. |
⇒ | If greater than the specified range, test the signal circuit for a short to voltage. If the circuit tests normal, replace the 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 instrument cluster. |
⇒ | If not within the specified range, replace the outside air temperature sensor. |
⇒ | If not within the specified range, replace the outside air temperature sensor. |
Perform the Diagnostic Repair Verification after completing the diagnostic procedures.
• | Control Module References for module replacement, programming and setup |
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