Diagnostic Test
- VERIFY THE DTC IS ACTIVE
- CHECK FOR BODY CONTROL MODULE (BCM) DTCS
- With the scan tool, read BCM DTCs.
Are there any BCM CAN Bus DTCs present?
Yes
- Perform the appropriate diagnostic procedure. Refer to the DIAGNOSTIC CODE INDEX .
No
- Go To 3
- With the scan tool, read BCM DTCs.
- CHECK FOR DRIVE TRAIN CONTROL MODULE (DTCM) CAN BUS DTCS
- With the scan tool, read DTCM DTCs.
Are there any DTCM CAN Bus DTCs present?
Yes
- Perform the appropriate diagnostic procedure. Refer to the DIAGNOSTIC CODE INDEX .
No
- Go To 4
- With the scan tool, read DTCM DTCs.
- CHECK OTHER MODULES FOR DTCS
- With the scan tool, read DTCs.
Are there any other modules reporting implausible communication DTCs against the EPS Module?
Yes
- Replace the Electric Power Steering (EPS) Module in accordance with the Service Information. Refer to GEAR, REMOVAL .
No
- Using the schematics as a guide, check the DTCM pins, terminals, and connectors for corrosion, damage, or terminal push out. Pay particular attention to all power and ground circuits. If no problems are found, replace the Dive Train Control Module (DTCM) in accordance with the Service Information. Refer to MODULE, DRIVETRAIN CONTROL, REMOVAL .
- Perform the DTCM VERIFICATION TEST. Refer to STANDARD PROCEDURE .
- With the scan tool, read DTCs.
- CHECK THE WIRING AND CONNECTORS
- The conditions necessary to set the DTC are not present at this time.
- Using the schematics as a guide, inspect the wiring and connectors specific to this module. Wiggle the wiring and connectors while checking for shorted and open circuits.
- Check all related splices and connectors for signs of water intrusion, corrosion, pushed out or bent terminals, and correct pin tension.
- Check Service Bulletins for any possible causes that may apply.
Were there any problems found?
Yes
- Repair as necessary.
- Perform the EPS VERIFICATION TEST. Refer to STANDARD PROCEDURE .
No
- Test complete.