Test Description
The number below refers to the step number on the diagnostic table.
- 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 | Values | Yes | No |
|---|---|---|---|---|
| Schematic Reference: HVAC Schematics
in HVAC Systems - Automatic, Instrument Cluster Schematics or Body Control System Schematics
in Computer/Integrating Systems. Connector End View Reference: HVAC Connector End Views in HVAC Systems - Automatic. 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 in Vehicle DTC Information |
| 2 | Did a DTC B0158 code set? | - | Go to Diagnostic Trouble Code (DTC) List - Vehicle in Vehicle DTC Information | 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.
|
- | Go to Testing for Intermittent Conditions and Poor Connections in Wiring Systems | Go to Step 4 |
| 4 |
IMPORTANT:
Verify the resistance settings with a DMM.
|
- | 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
in Wiring Systems. 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
in Wiring Systems. 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
in Wiring Systems. 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
in Wiring Systems. 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 Sensor Replacement
in Stationary Windows. Did you complete the replacement? |
- | Go to Step 11 | - |
| 10 | Replace the radio. Refer to Control Module References
in Computer/Integrating Systems for replacement, setup, and programming. Did you complete the replacement? |
- | Go to Step 11 | - |
| 11 |
|
- | - | Go to Step 2 |