Diagnostic Test

CHECK FOR AN ACTIVE DTC
1. Turn the ignition on.
2. With a scan tool, select read DTCs.
  Is the DTC active?
  
  Yes
  - Go To 2
  No
  - Perform the INTERMITTENT CONDITION diagnostic procedure. Refer to STANDARD PROCEDURE .
VERIFY THAT THE TIPM IS CAPABLE OF SETTING AMBIENT AIR TEMPERATURE SENSOR FAULTS
1. Check the TIPM fault code list to verify that the TIPM has the capability to set DTCs against the AAT Sensor. Refer to DIAGNOSTIC CODE INDEX .
  Are there any AAT Sensor faults listed in the DTC list for the TIPM?
  
  Yes
  - Go To 3
  No
  - Go To 4
CHECK THE TIPM FOR AAT SENSOR FAULTS
1. With the scan tool, read DTCs in the TIPM.
  Is the TIPM setting any DTCs against the AAT Sensor?
  
  Yes
  - Perform the diagnostic procedure in the TIPM. Refer to DIAGNOSTIC CODE INDEX .
  No
  - Replace and program the Totally Integrated Power in accordance with the Service Information..
CHECK THE AAT SENSOR WIRING
1. Turn the ignition off.
2. Disconnect the AAT Sensor harness connector.
3. Disconnect the appropriate TIPM harness connector.
4. Check the AAT Sensor wires:
  - for an open condition.
  - for a short to voltage.
  - for a short to ground.
  - for a short to each other.
  Were any problems found with the wiring?
  
  Yes
  - Perform the appropriate repair of the wiring.
  - Perform the POWERTRAIN VERIFICATION TEST. Refer to POWERTRAIN VERIFICATION TEST .
  No
  - Go To 5
AAT SENSOR
1. Replace the AAT Sensor in accordance with the Service Information.
2. Reconnect all harness connectors.
3. Turn the ignition on.
4. With the scan tool, read DTCs.
  Is the DTC still active?
  
  Yes
  - Replace and program the Totally Integrated Power Module in accordance with the Service Information.
  - Perform the POWERTRAIN VERIFICATION TEST. Refer to POWERTRAIN VERIFICATION TEST .
  No
  - Repair is complete.
  - Perform the POWERTRAIN VERIFICATION TEST. Refer to POWERTRAIN VERIFICATION TEST .