Diagnostic Test

VERIFY THE DTC IS ACTIVE
NOTE:
This DTC must be active for the results of this test to be valid.
1. Turn the ignition on.
2. With the scan tool, record and erase DTCs.
3. Cycle the ignition switch from off to on.
4. With the scan tool, read DTCs.
  Is the DTC active at this time?
  
  Yes
  - Go To 2
  No
  - Go To 4
CHECK IF BCM CAN BUS DTCS ARE PRESENT
1. With the scan tool, read BCM DTCs.
  Are there any BCM CAN BUS DTC's present?
  
  Yes
  - Perform the appropriate diagnostic procedure. Refer to MODULE, BODY CONTROL (BCM), REMOVAL .
  No
  - Go To 3
ABS DTCS PRESENT
1. Ignition on, engine not running.
2. With the scan tool, read DTCs in the Antilock Brake Controller.
  Are there any DTCs present?
  
  Yes
  - Perform the appropriate diagnostic procedure. Refer to DIAGNOSTIC CODE INDEX .
  No
  - Replace the Drive Train Control Module (DTCM) in accordance with the Service Information.
  - Perform DTCM VERIFICATION TEST. Refer to DTCM VERIFICATION TEST .
INTERMITTENT WIRING HARNESS AND CONNECTORS
1. The conditions necessary to set this DTC are not present at this time.
2. Using the wiring diagram/schematic as a guide, inspect the wiring harness and connectors.
3. Wiggle test the wiring harness and connectors while monitoring the scan tool data relative to this circuit.
4. Look for the data to change or for the DTC to reset during the wiggle test.
5. While monitoring the scan tool data relative to this circuit, move the selector switch to each position several times (if equipped).
  Were there any problems found?
  
  Yes
  - Repair as necessary.
  - Perform DTCM VERIFICATION TEST. Refer to DTCM VERIFICATION TEST .
  No
  - Test complete.