Diagnostic Test

CHECK FOR AN ACTIVE DTC
1. Turn the ignition on.
2. With the scan tool, read ABS DTCs and record on the repair order.
  WARNING:
  To avoid possible serious or fatal injury, check brake capability is available before road testing.
3. Road test the vehicle in a straight manner for two minutes over 40 km/h (25 mph).
  NOTE:
  Vehicle must be driven straight for several minutes above 40 km/h (25 mph) for set conditions to be met.
4. With the scan tool, read ABS DTCs and record on the repair order.
  Did the DTC return?
  
  Yes
  - Go To 2
  No
  - Test complete, the condition or conditions that originally set this DTC are not present at this time.
CHECK FOR OCCUPANT RESTRAINT CONTROLLER (ORC) OR COMMUNICATION RELATED DTCS
1. Refer to the recorded DTCs.
  Are there any ORC or Communication related DTCs active?
  
  Yes
  - Perform the appropriate diagnostic procedures before continuing with this test. Refer to DTC INDEX (1 OF 2) and/or DTC INDEX (2 OF 2) .
  No
  - Go To 3
PERFORM THE ABS INITIALIZATION ROUTINE
1. Park the vehicle on level ground.
2. Turn the ignition on.
3. With the scan tool, under "Miscellaneous Functions" perform the ABS Initialization routine.
  Was the ABS Initialization routine successful?
  
  Yes
  - Test complete.
  - Perform the ABS VERIFICATION TEST. Refer to ABS VERIFICATION TEST .
  No
  - Perform the ABS Initialization routine again, if still unsuccessful.
  - Go To 4
CHECK RELATED HARNESS CONNECTIONS
1. Disconnect the ABS Module harness connector.
2. Disconnect all related in-line harness connections (if equipped).
3. Disconnect the related component harness connectors.
4. 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.
5. Connect the ABS Module harness connector. Be certain that the harness connector is fully seated and the connector lock is fully engaged.
6. Connect all in-line harness connectors (if equipped). Be certain that all connectors are fully seated and the connector locks are fully engaged.
7. Connect the related component harness connectors. Be certain that all connectors are fully seated and the connector locks are fully engaged.
8. With the scan tool, erase DTCs.
  WARNING:
  To avoid possible serious or fatal injury, check brake capability is available before road testing.
9. 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.
10. 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 AND INSTALLATION .
  - Perform ABS VERIFICATION TEST. Refer to ABS VERIFICATION TEST .
  No
  - Perform ABS VERIFICATION TEST. Refer to ABS VERIFICATION TEST .
  - Test complete.