Diagnostic Test

CHECK FOR AN ACTIVE DTC
1. Perform any Service Bulletins that may apply.
2. Ignition on.
3. With the scan tool, read and record the ABS DTCs.
4. With the scan tool, read and record Environmental Data (EV Data).
5. With the scan tool, erase ABS DTCs.
  WARNING:
  To avoid possible serious or fatal injury, check brake capability is available before road testing.
6. Test drive the vehicle at a velocity of 40 km/h (25 mph).
7. Park the vehicle on level ground.
8. Cycle the ignition from off to on.
9. With the scan tool, read the ABS DTCs.
  Is the DTC active?
  
  Yes
  - Go To 2
  No
  - Perform the ABS-INTERMITTENT CONDITION TEST. Refer to ABS INTERMITTENT CONDITION .
CHECK FOR BODY CONTROL MODULE (BCM) DTCS
1. Refer to the recorded DTCs.
  Are there any BCM or Communication related DTCs active or pending?
  
  Yes
  - Perform the appropriate diagnostic procedure. Refer to DTC TROUBLESHOOTING .
  No
  - Go To 3
INCORRECT TIRES PROGRAMMED INTO BCM
1. Inspect all four tires on the vehicle and note the size of each tire.
  NOTE:
  A non-production size tire cannot be programmed into the BCM. The production Powertrain, with the production size tires, is the only emissions certified configuration that is available for reprogramming.
2. Verify the correct Tire/wheel information is programmed in the BCM.
3. Perform the BCM PROXI Alignment routine.
  Is the correct value programmed in the BCM?
  
  Yes
  - Go To 4
  No
  - Program the correct Tire/Wheel information in the BCM.
  - 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.
  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.