Diagnostic Test

VERIFY THE DTC IS ACTIVE
NOTE:
This DTC must be active for the results of this test to be valid.
1. Perform any Technical Service Bulletins (TSBs) that may apply.
2. Turn the ignition on.
3. With the scan tool, record and erase the DTCs.
4. Cycle the ignition switch from off to on.
5. With the scan tool, read the DTCs.
  Is the DTC active at this time?
  
  Yes
  - Go To 2
  No
  - Go To 4
CHECK POWERTRAIN CONTROL MODULE (PCM) CAN BUS DTCS ARE PRESENT
1. With the scan tool, read the PCM DTCs.
  Are there any PCM CAN BUS DTCs present?
  
  Yes
  - Perform the appropriate diagnostic procedures. Refer to DTC INDEX .
  - Perform the ASCM VERIFICATION TEST. Refer to ASCM VERIFICATION TEST .
  No
  - Go To 3
CHECK INTEGRATED PARK ASSIST MODULE (PAM) CAN BUS DTCS ARE PRESENT
1. With the scan tool, read the PAM DTCs.
  Are there any PAM CAN BUS DTCs present?
  
  Yes
  - Perform the appropriate diagnostic procedures. Refer to DIAGNOSTIC CODE INDEX .
  - Perform the ASCM VERIFICATION TEST. Refer to ASCM VERIFICATION TEST .
  No
  - Using the schematics as a guide, check the Air Suspension Control Module (ASCM) pins, terminals, and connectors for corrosion, damage, or terminal push out. Pay particular attention to all power and ground circuits. If no problems are found, replace the Air Suspension Control Module (ASCM) accordance with Service Information. Refer to MODULE, AIR SUSPENSION CONTROL (ASCM), REMOVAL .
  - Perform the ASCM VERIFICATION TEST. Refer to ASCM VERIFICATION TEST .
INTERMITTENT WIRING AND CONNECTORS
1. Using the wiring diagram/schematic as a guide, inspect the wiring harness and connectors.
2. Wiggle test the wiring harness and connectors while monitoring the scan tool data relative to this circuit.
3. Look for the data to change or for the DTC to reset during the wiggle test.
4. While monitoring the scan tool data relative to this circuit, move the selector switch to each position several times.
5. Look for the data to change other than as expected or for the DTC to reset.
  Were any problems found?
  
  Yes
  - Repair as necessary.
  - Perform the ASCM VERIFICATION TEST. Refer to ASCM VERIFICATION TEST .
  No
  - Test complete, the condition or conditions that originally set this DTC are not present at this time.