Diagnostic Test

VERIFY THE DTC IS ACTIVE
1. If any CAN Communication DTCs are present, perform the diagnostics for them first before continuing with this diagnostic procedure.
  NOTE:
  This DTC must be active for the results of this test to be valid.
2. Perform any Service Bulletins that may apply.
3. Turn the ignition on.
4. For future reference, with the scan tool, run and save a vehicle Scan Report and all related recorded data.
5. With the scan tool, read DTCs and record on the repair order.
6. With the scan tool, erase all DTCs.
7. Turn the ignition off for a minimum of 10.0 seconds.
8. Turn the ignition on.
  Did the DTC return?
  
  Yes
  - Go To 2
  No
  - Perform the ABS-INTERMITTENT CONDITION TEST. Refer to ABS INTERMITTENT CONDITION .
CHECK FOR DRIVE TRAIN CONTROL MODULE (DTCM) OR COMMUNICATION RELATED DTCS
1. With the scan tool, read the DTCM DTCs.
  Are there any DTCM DTCs present?
  
  Yes
  - Perform the appropriate diagnostic procedures. Refer to DRIVETRAIN CONTROL MODULE (DTCM) - DIAGNOSTIC CODE INDEX .
  No
  - Go To 3
CHECK THE DTCM WIRING AND HARNESS CONNECTIONS
1. Turn the ignition off.
2. Disconnect the DTCM harness connectors.
3. Disconnect all related in-line harness connections (if equipped).
4. Disconnect the related component harness connectors.
5. Inspect the wiring, harness connectors, component connectors, and all male and female terminals for the following conditions:
  - Broken or pinched wiring.
  - Proper connector installation.
  - Damaged connector locks.
  - Corrosion.
  - Other signs of water intrusion.
  - Weather seal damage (if equipped).
  - Bent terminals.
  - Overheating due to a poor connection (terminal may be discolored due to excessive current draw).
  - Terminals that have been pushed back into the connector cavity.
  - Perform a terminal drag test on each connector terminal to verify proper terminal tension.
  Repair any conditions that are found.
6. Connect the DTCM harness connector. Be certain that the harness connector is fully seated and the connector lock is fully engaged.
7. Connect all in-line harness connectors (if equipped). Be certain that all connectors are fully seated and the connector locks are fully engaged.
8. Connect the related component harness connectors. Be certain that all connectors are fully seated and the connector locks are fully engaged.
9. With the scan tool, erase DTCs.
  WARNING:
  To avoid possible serious or fatal injury, check brake capability is available before road testing.
10. Using the recorded Event and Environmental Data, along with the When Monitored and Set Conditions above, operate the vehicle in the conditions that set the DTC.
11. With the scan tool, read ABS DTCs.
  Did the DTC return?
  
  Yes
  - Go To 4
  No
  - The wiring or poor connection problem has been repaired.
  - Perform ABS VERIFICATION TEST. Refer to ABS VERIFICATION TEST .
CHECK RELATED HARNESS CONNECTIONS
1. Turn the ignition off.
2. Disconnect the ABS Module harness connector.
3. Disconnect all related in-line harness connections (if equipped).
4. Disconnect the related component harness connectors.
5. Inspect harness connectors, component connectors, and all male and female terminals for the following conditions:
  - Proper connector installation.
  - Damaged connector locks.
  - Corrosion.
  - Other signs of water intrusion.
  - Weather seal damage (if equipped).
  - Bent terminals.
  - Overheating due to a poor connection (terminal may be discolored due to excessive current draw).
  - Terminals that have been pushed back into the connector cavity.
  - Perform a terminal drag test on each connector terminal to verify proper terminal tension.
  Repair any conditions that are found.
6. Connect the ABS Module harness connector. Be certain that the harness connector is fully seated and the connector lock is fully engaged.
7. Connect all in-line harness connectors (if equipped). Be certain that all connectors are fully seated and the connector locks are fully engaged.
8. Connect the related component harness connectors. Be certain that all connectors are fully seated and the connector locks are fully engaged.
9. With the scan tool, erase DTCs.
  WARNING:
  To avoid personal injury or death, check brake capability is available before road testing.
10. Using the recorded Event and Environmental Data, along with the When Monitored and Set Conditions above, operate the vehicle in the conditions that set the DTC.
11. With the scan tool, read ABS Module DTCs.
  Did the DTC return?
  
  Yes
  - Replace the Anti-lock Brake System (ABS) Module in accordance with the Service Information. Refer to MODULE, ANTI-LOCK BRAKE SYSTEM (ABS), REMOVAL .
  - Perform ABS VERIFICATION TEST. Refer to ABS VERIFICATION TEST .
  No
  - Test Complete.
  - Perform ABS VERIFICATION TEST. Refer to ABS VERIFICATION TEST .