Diagnostic Test

CHECK FOR AN ACTIVE DTC
1. Perform any Service Bulletins that may apply.
2. Turn the ignition on.
3. With the scan tool, read ABS DTCs and record on the repair order.
4. With the scan tool, erase DTCs.
5. Cycle the ignition from off to on.
6. Press and hold the brake pedal.
7. Push the EPB Switch down to release the Electric Parking Brakes.
8. Pull the EPB Switch up to set the Electric Parking Brakes.
9. Push the EPB Switch down to release the Electric Parking Brakes.
10. Release the brake pedal.
11. Cycle the ignition from off to on.
12. With the scan tool, read ABS DTCs.
  Did the DTC return?
  
  Yes
  - Go To 2
  No
  - The conditions that caused this code to set are not present at this time. Using the appropriate SYSTEM WIRING DIAGRAM/schematic as a guide, inspect the wiring harness and electrical connectors.
  - Perform the ABS VERIFICATION TEST. Refer to ABS VERIFICATION TEST .
PERFORM THE ASSEMBLY CHECK ROUTINE
1. Turn the ignition on.
2. With the scan tool, in the "Service Procedure Menu" perform the Assembly Check routine.
3. With the scan tool, erase the DTCs.
4. Cycle the ignition from off to on.
5. With the scan tool, read ABS DTCs.
  Did the DTC return?
  
  Yes
  - Go To 3
  No
  - Test complete, the condition or conditions that originally set this DTC are not present at this time.
  - Perform the ABS VERIFICATION TEST. Refer to ABS VERIFICATION TEST .
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.
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.