Diagnostic Test

CHECK FOR AN ACTIVE DTC
NOTE:
This DTC must be active for the results of this test to be valid.
1. Perform any Service Bulletins that may apply.
2. Turn the ignition on.
3. With the scan tool, run and save a vehicle Scan Report.
4. With the scan tool, read ABS DTCs and record on the repair order.
5. With the scan tool, read and record Environmental Data to help identify the conditions in which the DTC was set.
6. With the scan tool, erase ABS DTCs.
7. Cycle the ignition from off to on.
8. With the scan tool, read ABS DTCs.
  Did the DTC return?
  
  Yes
  - Go To 2
  No
  - The condition that caused this code to set is not present at this time. Check for an intermittent condition by inspecting the related wiring harness for chafed, pierced, pinched, and partially broken wires. Also inspect the related connectors for broken, bent, pushed out, spread, corroded, or contaminated terminals.
  - Perform the ABS-INTERMITTENT CONDITION TEST. Refer to ABS INTERMITTENT CONDITION .
PERFORM THE EXIT IN PLANT MODE PROCEDURE
1. Turn the ignition on.
2. With the scan tool, under "Miscellaneous Functions" in the ABS Module select "Service Procedures".
3. With the scan tool, select "Exit in Plant Mode".
4. With the scan tool, erase the DTCs.
5. Cycle the ignition from off to on.
6. With the scan tool, read ABS DTCs.
  Does the DTC remain active or stored?
  
  Yes
  - Go To 3
  No
  - Test complete, the condition or conditions that originally set this DTC are not present at this time.
  - Perform ABS VERIFICATION TEST. Refer to ABS VERIFICATION TEST .
PERFORM THE ANTI-LOCK BRAKE SYSTEM (ABS) MODULE INITIALIZATION ROUTINE
1. Turn the ignition on.
2. With the scan tool, under "Miscellaneous Function" perform the ABS Initialization 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.
  Does the DTC remain active?
  
  Yes
  - Go To 4
  No
  - Test complete, the condition or conditions that originally set this DTC are not present at this time.
  - Perform 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.
  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.