Diagnostic Test
WARNING: This page is about a different car, the 2009 Dodge Durango and 2009 Chrysler Aspen. However, it is still accessible from the selected car via links, so may be relevant.
- CHECK FOR DTC U0429-IMPLAUSIBLE DATA RECEIVED FROM SCM NOTE: This DTC must be active for the results of this test to be valid.
- Ignition on, engine not running.
- With the scan tool, record and erase DTCs.
- Cycle the ignition switch from off to on.
- With the scan tool, read DTCs.
Does the scan tool display: U0429-IMPLAUSIBLE DATA RECEIVED FROM SCM?
Yes
- Go to 2
No
- Refer to Non-DTC Diagnostics/Communication - Diagnosis and Testing and perform the Lost Stored Communication DTC diagnostic procedure.
- CHECK IF FCM CAN BUS DTCS ARE PRESENT
- With the scan tool, read FCM DTCs.
Are there any FCM CAN BUS DTCs present?
Yes
- Perform the appropriate diagnostic procedure. Refer to DTC-Based Diagnostics/MODULE, Front Control (FCM) - Diagnosis and Testing .
No
- Go to 3
- With the scan tool, read FCM DTCs.
- STEERING ANGLE SENSOR (SAS) DTCS PRESENT
- With the scan tool, read ABS DTCs.
Are there any SAS DTCs present?
Yes
- Perform the appropriate diagnostic procedure. Refer to DTC-Based Diagnostics/MODULE, Antilock Brake (ABS) - Diagnosis and Testing .
No
- Using the schematics as a guide, check the Final Drive Control Module (FDCM) pins, terminals, and wiring harness connectors for corrosion, damage, or terminal push out. Pay particular attention to all power and ground circuits. If no problems are found, replace the Final Drive Control Module (FDCM) in accordance with the Service Information.
- Perform the TRANSFER CASE VERIFICATION TEST. See DTC-Based Diagnostics/MODULE, Final Drive Control (FDCM) - Standard Procedure .
- With the scan tool, read ABS DTCs.