Step | Action | Yes | No |
|---|---|---|---|
1 | Did you perform the HVAC Diagnostic System Check? | Go to Step 2 | Go to Diagnostic System Check |
2 | Inspect the outside air temperature sensor for obstructions or improper mounting. Did you find and correct the condition? | Go to Step 8 | Go to Step 3 |
3 |
IMPORTANT: An improperly functioning engine coolant temperature (ECT) sensor can affect the outside air temperature reading. Refer to Ambient Air Temperature Sensor Description . With a scan tool, inspect for current or history codes relating to the ECT in the PCM. Refer to Powertrain On Board Diagnostic (OBD) System Check in Engine Controls-3.8L. Did you find and correct the condition? | Go to Step 8 | Go to Step 4 |
4 |
IMPORTANT: An improperly functioning vehicle speed sensor (VSS) can affect the outside air temperature reading. With a scan tool, inspect for current or history codes relating to the VSS in the PCM. Refer to Powertrain On Board Diagnostic (OBD) System Check in Engine Controls-3.8L. Did you find and correct the condition? | Go to Step 8 | Go to Step 5 |
5 | 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 in Wiring Systems. Did you find and correct the condition? | Go to Step 8 | Go to Step 6 |
6 | Test the outside air temperature sensor resistance. Refer to Sensor Resistance Table . Is the resistance within the specified value? | System OK | Go to Step 7 |
7 | Replace the outside air temperature sensor. Refer to Ambient Temperature Sensor Replacement . Did you complete the repair? | Go to Step 8 | -- |
8 | Operate the system in order to verify the repair. Did you correct the condition? | System OK | Go to Step 2 |
