2010 Cadillac Truck SRX AWD V6-3.0L Page 238
If the DTC is set, replace the appropriate K96L left mirror control module or the S79P passenger window switch.
Repair Instructions
Perform the Diagnostic Repair Verification (See: Verification Tests) after completing the diagnostic procedure.
Control Module References (See: Testing and Inspection/Programming and Relearning)for left mirror control module or passenger window switch
replacement, setup, and programming
B0158
DTC B0158
Diagnostic Instructions
* Perform the Diagnostic System Check - Vehicle (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic System
Check - Vehicle) prior to using this diagnostic procedure.
* Review Strategy Based Diagnosis (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Strategy Based Diagnosis) for an
overview of the diagnostic approach.
* Diagnostic Procedure Instructions (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic Procedure
Instructions) provides an overview of each diagnostic category.
DTC Descriptors
DTC B0158 02
- Ambient Air Temperature Sensor Circuit Short to Ground
DTC B0158 05
- Ambient Air Temperature Sensor Circuit High Voltage/Open
Diagnostic Fault Information
Circuit/System Description
The instrument cluster provides 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 center.
Conditions for Running the DTC
The system voltage is between 9-16 V
Conditions for Setting the DTC
B0158 02
The instrument cluster detects the sensor signal circuit is greater than 88掳C (190掳F).
B0158 05
The instrument cluster detects the sensor signal circuit is less than -40掳C (-40掳F).
Action Taken When the DTC Sets
The instrument cluster uses a default air temperature value for further calculations. The driver information center displays ---掳C ( ---掳F).
Conditions for Clearing the DTC
The DTC will become history if the instrument cluster no longer detects a malfunction.
