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. For future reference, with the scan tool, run and save a vehicle Scan Report and all related recorded data.
4. With the scan tool, read DTCs and record on the repair order.
5. With the scan tool, erase all DTCs.
6. Turn the ignition off for a minimum of 10.0 seconds.
7. With the scan tool, read ABS DTCs.
  Did the DTC return?
  
  Yes
  - Go To 2
  No
  - Perform the ABS INTERMITTENT CONDITION TEST. Refer to: ABS INTERMITTENT CONDITION .
CHECK FOR POWERTRAIN CONTROL MODULE (PCM), VEHICLE IDENTIFICATION NUMBER (VIN) OR COMMUNICATION RELATED DTCS PRESENT
1. Refer to the recorded DTCs.
  Are there any PCM DTCs present?
  
  Yes
  - Perform the applicable diagnostic procedure(s). Refer to: ANTI-LOCK BRAKES (ABS) - DIAGNOSTIC CODE INDEX .
  No
  - Go To 3
PERFORM THE FOLLOWING ANTI-LOCK BRAKE SYSTEM (ABS) MODULE ROUTINES
NOTE:
If C2202-00 Original VIN mismatch / Missing is set along with this DTC, perform the diagnostic procedure for C2202-00 before continuing with this test.

NOTE:
ABS initialization data will not be saved if ignition has not been off for five minutes or if battery has been disconnected.

NOTE:
When performing the following routines, the vehicle must be parked on level ground, wheels pointed straight, brake pedal released, park brake not applied and vehicle temperature above 10°C (50°F).
1. Turn ignition on.
2. With the scan tool, under "Miscellaneous Functions" perform the ABS Initialization routine.
3. With the scan tool, under "Miscellaneous Functions" perform the Brake Pedal Calibration routine.
4. With the scan tool, under "Miscellaneous Functions" - "Service Procedures" perform the Assembly Check routine.
5. Turn the ignition off for a minimum of 10.0 seconds.
6. Turn ignition on.
7. With the scan tool, erase DTCs.
8. With the scan tool, read 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.
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 AND INSTALLATION .
  - Perform the ABS VERIFICATION TEST. Refer to: ABS VERIFICATION TEST .
  No
  - The wiring or poor connection problem has been repaired.
  - Perform the ABS VERIFICATION TEST. Refer to: ABS VERIFICATION TEST .