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 BSCM DTCs and record on the vehicle repair order.
4. With the scan tool, erase BSCM DTCs.
5. Cycle the ignition from off to on.
6. With the scan tool, read BSCM DTCs.
  Is the DTC active?
  
  Yes
  - Go To: Appropriate diagnostic procedure.
  No
  - The condition or conditions that originally set this DTC are not present at this time. Using the wiring diagrams as a guide, check all related splices and connectors for signs of water intrusion, corrosion, pushed out or bent terminals, and correct pin tension and repair as necessary.
  - Perform the BSCM INTERMITTENT CONDITION TEST. Refer to: BSCM INTERMITTENT CONDITION .
CHECK FOR BSCM OR COMMUNICATION RELATED DTCS
1. Refer to the recorded DTCs.
  Are there any other BSCM or Communication related DTCs active or stored?
  
  Yes
  - Perform the applicable diagnostic procedure(s). Refer to: BRAKE SYSTEM CONTROL MODULE (BSCM) - DIAGNOSTIC CODE INDEX .
  No
  - Go To: Appropriate diagnostic procedure.
CHECK RELATED HARNESS CONNECTIONS
1. Turn the ignition off.
2. Disconnect the BSCM 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 BSCM 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 possible serious or fatal injury, 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 BSCM DTCs.
  Did the DTC return?
  
  Yes
  - Replace the Brake System Control Module (BSCM) in accordance with the Service Information. Refer to: MODULE, BRAKE SYSTEM CONTROL (BSCM), REMOVAL AND INSTALLATION .
  - Perform the BSCM VERIFICATION TEST. Refer to: BSCM VERIFICATION TEST .
  No
  - The wiring or poor connection problem has been repaired.
  - Perform the BSCM VERIFICATION TEST. Refer to: BSCM VERIFICATION TEST .