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Home >> Pontiac >> 2005 >> G6 GT >> Repair and Diagnosis >> Accessories & Equipment >> Gauges & Instrument Panels >> Instrument Panel System Displays, Gauges And Console >> Diagnostic Information and Procedures >> Outside Air Temperature Display Inaccurate or Inoperative >> Test Description

Test Description

The number below refers to the step number on the diagnostic table.

  1. 4:  This step tests for resistance in the signal and ground circuit of the ambient air temperature sensor. There may be resistance that is to low to set the DTC B0158 ambient air temp sensor code. Checking the actual signal and ground circuit resistance against the reference resistance table will verify the resistance level of both the ambient air temperature signal and ground circuits.
Outside Air Temperature Display Inaccurate or Inoperative

Step Action Yes No
Schematic Reference: HVAC Schematics , Instrument Cluster Schematics  or Body Control System Schematics
Connector End View Reference: HVAC Connector End Views
DEFINITION: The outside air temperature display on the driver information center (DIC) or radio display cannot be adjusted, or is inaccurate. The DIC is located in the radio display.
1 Did you perform the Diagnostic System Check - Vehicle? Go to Step 2  Go to Diagnostic System Check - Vehicle
2 Did a DTC B0158 code set? Go to Diagnostic Trouble Code (DTC) List - Vehicle Go to Step 3 
3
IMPORTANT: A thermometer is a proper tool to use when checking the actual ambient temperature. Ambient temperature should not be taken from a radio station or a sign displaying temperature.
  1. Turn ON the ignition, with the engine OFF.
  2. Set the driver information center (DIC) menu on the radio to the temperature display.
Does the temperature displayed on the DIC show an accurate temperature reading?		 Go to Testing for Intermittent Conditions and Poor Connections Go to Step 4 
4 
IMPORTANT: Verify the resistance settings with a DMM.
  1. Verify the ambient air temperature.
  2. Test the ambient air temperature sensor signal circuit and the ground circuit for resistance between the sensor signal circuit and the low reference circuit. Refer to Sensor Resistance Table (Ambient Air Temp Sensor) .
Is the resistance within the table min/max ohm parameters for the stated °C/°F temperature?		 Go to Step 5  Go to Step 7 
5 Test the ambient air temperature sensor signal circuit for a high resistance. Refer to Circuit Testing and Wiring Repairs .
Did you find and correct the condition?		 Go to Step 11  Go to Step 6 
6 Test the ground circuit of the ambient air temperature sensor for a high resistance. Refer to Circuit Testing and Wiring Repairs .
Did you find and correct the condition?		 Go to Step 11  Go to Step 8 
7 Inspect for poor connections at the harness connector of the ambient 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 11  Go to Step 9 
8 Inspect for poor connections at the harness connector of the radio. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs .
Did you find and correct the condition?		 Go to Step 11  Go to Step 10 
9 Replace the ambient air temperature sensor. Refer to Ambient Air Temperature Gage Sensor Replacement .
Did you complete the replacement?		 Go to Step 11  -
10 Replace the radio. Refer to Control Module References for replacement, setup, and programming.
Did you complete the replacement?		 Go to Step 11  -
11
  1. Use the scan tool to clear any DTC codes.
  2. Operate the system in order to verify the repair.
Did you correct the condition?		 - Go to Step 2 
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