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 DTCs and record on the repair order.
4. With the scan tool, read and record Environmental Data to help identify the conditions in which the DTC was set.
5. With the scan tool, erase DTCs.
  WARNING:
  To avoid possible serious or fatal injury, check brake capability is available before road testing.
6. Test drive the vehicle straight with speeds above 15 km/h (9 mph).
7. Stop the vehicle.
8. Slowly turn the steering wheel from lock to lock.
9. With the scan tool, read EPS DTCs.
  Did the DTC return?
  
  Yes
  - Go To 2
  No
  - Perform the TESTING FOR AN INTERMITTENT CONDITION diagnostic procedure. Refer to TESTING FOR AN INTERMITTENT CONDITION .
CHECK FOR BODY CONTROL MODULE (BCM) DTCS
1. With the scan tool, read the BCM DTCs.
  Are there any BCM CAN Bus DTCs present?
  
  Yes
  - Perform the appropriate diagnostic procedure. Refer to DTC INDEX (1 OF 3) and/or DTC INDEX (2 OF 3) and/or DTC INDEX (3 OF 3) .
  No
  - Go To 3
CHECK FOR BRAKE SYSTEM CONTROL MODULE (BSCM) DTCS
1. With the scan tool, read the BSCM DTCs.
  Are there any BSCM DTCs present?
  
  Yes
  - Perform the appropriate diagnostic procedure. Refer to DTC INDEX (1 OF 3) and/or DTC INDEX (2 OF 3) and/or DTC INDEX (3 OF 3) .
  No
  - Go To 4
CHECK OTHER MODULES FOR DTCS
1. With the scan tool, read DTCs.
  Are there any other modules reporting implausible communication DTCs against the BSCM?
  
  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 EPS VERIFICATION TEST. Refer to EPS VERIFICATION TEST .
  No
  - Go To 5
CHECK RELATED HARNESS CONNECTIONS
NOTE:
Do not disconnect the Torque Sensor (Grey) harness connector and make sure it is connected properly.
1. Disconnect the EPS Module harness connectors.
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 EPS Module harness connectors. Be certain that the harness connectors are fully seated and the connector locks are 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 EPS Module DTCs.
  Did the DTC return?
  
  Yes
  - Replace the Electric Power Steering (EPS) Module in accordance with service information. Refer to GEAR, REMOVAL AND INSTALLATION .
  - Perform the EPS VERIFICATION TEST. Refer to EPS VERIFICATION TEST .
  No
  - Perform the EPS VERIFICATION TEST. Refer to EPS VERIFICATION TEST .
  - Test complete.