Diagnostic Test

ANTI-LOCK BRAKE SYSTEM (ABS) MODULE DTCS PRESENT
1. Ignition on, engine not running.
2. With the scan tool, read DTCs in the ABS Module.
  Are there any ABS DTCs present?
  
  Yes
  - Refer to DIAGNOSIS AND TESTING and perform the appropriate diagnostic procedure.
  No
  - Go To 2.
VERIFY THE DTC IS ACTIVE
NOTE:
If C1456 or C145D are present, diagnose these DTC(s) first before continuing with this diagnostic procedure.
1. Ignition on, engine not running.
2. With the scan tool, read DTCs.
  Is the DTC Active at this time?
  
  Yes
  - Go To 3.
  No
  - Go To 5.
VERIFY SET CONDITION
NOTE:
Check with customer on driving terrain (mud, sand, snow) for set condition.
1. With the scan tool, record and erase DTCs.
2. Test drive vehicle on dry paved road.
3. With the scan tool, read DTCs.
  Is the status Active for this DTC?
  
  Yes
  - Go To 4.
  No
  - Test Complete.
  - Perform the DTCM VERIFICATION TEST. Refer to STANDARD PROCEDURE .
DRIVE TRAIN CONTROL MODULE (DTCM)
NOTE:
Before continuing, check the DTCM harness connector terminals for corrosion, damage, or terminal push out. Repair as necessary.
1. Using the schematics as a guide, inspect the wire harness and connectors. Pay particular attention to all Power and Ground circuits.
  Were there any problems found?
  
  Yes
  - Repair as necessary.
  - Perform the DTCM VERIFICATION TEST. Refer to STANDARD PROCEDURE .
  No
  - Replace the Drive Train Control Module (DTCM) in accordance with Service Information. Refer to MODULE, DRIVETRAIN CONTROL, REMOVAL .
  - Perform the DTCM VERIFICATION TEST. Refer to STANDARD PROCEDURE .
INTERMITTENT WIRING AND CONNECTORS
1. The conditions necessary to set this DTC are not present at this time.
2. Using the schematics as a guide, inspect the wiring and connectors specific to this circuit.
3. Wiggle test the wiring harness and connectors while checking for shorted and open circuits.
4. Using the scan tool, monitor the data related to this circuit while performing the wiggle test. Look for the data to change or for the DTC to reset.
  Were there any problems found?
  
  Yes
  - Repair as necessary.
  - Perform the DTCM VERIFICATION TEST. Refer to STANDARD PROCEDURE .
  No
  - Test complete.