Test Description

WARNING: This page is about a different car, the 2007 Pontiac G5 Pursuit, 2007 Pontiac G5, and 2007 Chevrolet Cobalt. However, it is still accessible from the selected car via links, so may be relevant.

The numbers below refer to the step numbers on the diagnostic table.

2: The operating range of the sensor is between 0.4-4.8 volts. If the DMM displays a value less than 0.4 volt or greater than 4.8 volts, then the sensor is performing outside of its designed limits.
3: Tests for the proper operation of the circuit in the high voltage range.
4: Tests for the proper operation of the circuit in the low voltage range. If the fuse in the jumper opens when you perform this test, the signal circuit is shorted to voltage.
5: Test the signal circuit for a short to ground.
6: Tests the signal circuit for a short to voltage, a high resistance, or an open.
7: Tests the low reference circuit for a high resistance or an open.

DTC B0158

Step	Action	Values	Yes	No
Schematic Reference: HVAC Schematics Connector End View Reference: HVAC Connector End Views
1	Did you perform the Diagnostic System Check - Vehicle?	-	Go to Step 2	Go to DIAGNOSTIC SYSTEM CHECK - VEHICLE
2	Install a digital multimeter. Turn ON the ignition, with the engine OFF. With a DMM, observe the Outside Air Temperature Sensor signal circuit. Does the DMM indicate that the Temperature Sensor signal parameter is within the specified range?	0.4-4.8 V	Go to Testing for Intermittent Conditions and Poor Connections	Go to Step 3
3	Turn OFF the ignition. Disconnect the outside air temperature sensor. Turn ON the ignition, with the engine OFF. With a DMM, observe the Outside Air Temperature Sensor signal circuit. Does the DMM indicate that the temperature sensor parameter is more than the specified value?	4.8 V	Go to Step 4	Go to Step 5
4	Turn OFF the ignition. Connect a 3-amp fused jumper wire between the outside air temperature sensor signal circuit and the low reference circuit of the outside air temperature sensor. Turn ON the ignition, with the engine OFF. With a DMM, observe the Outside Air Temperature signal parameter. Does the DMM indicate that the temperature sensor signal parameter is less than the specified value?	0.4 V	Go to Step 8	Go to Step 6
5	Test the signal circuit of the outside air temperature sensor for a short to ground. Refer to Circuit Testing and Wiring Repairs . Did you find and correct the condition?	-	Go to Step 12	Go to Step 9
6	Test the signal circuit of the outside air temperature sensor for a short to voltage, a high resistance, or an open. Refer to Circuit Testing and Wiring Repairs . Did you find and correct the condition?	-	Go to Step 12	Go to Step 7
7	Test the low reference circuit of the outside air temperature sensor for a high resistance or an open. Refer to Circuit Testing and Wiring Repairs . Did you find and correct the condition?	-	Go to Step 12	Go to Step 9
8	Inspect for poor connections at the harness connector of the outside air temperature sensor. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs . Did you find and correct the condition?	-	Go to Step 12	Go to Step 10
9	Inspect for poor connections at the harness connector of the BCM. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs . Did you find and correct the condition?	-	Go to Step 12	Go to Step 11
10	Replace the outside air temperature sensor. Refer Ambient Air Temperature Gage Sensor Replacement in Instrument Panel, Gages, and Console. Did you complete the replacement?	-	Go to Step 12	-
11	IMPORTANT: Perform the recalibration procedure for the body control module after the replacement procedure. Replace the BCM. Refer to Control Module References for replacement, setup, and programming.Did you complete the replacement?	-	Go to Step 12	-
12	Use the scan tool in order to clear the DTCs. Operate the vehicle within the Conditions for Running the DTC as specified in the supporting text. Does the DTC reset?	-	Go to Step 2	System OK