U0429-IMPLAUSIBLE DATA RECEIVED FROM STEERING CONTROL MODULE

For a complete wiring diagram, refer to the Wiring Information.

Theory of Operation

The messages sent on the CAN bus are distinguished by an identifier (ID). Each CAN ID is defined to contain a certain number of bytes. The Transmission Control Module (TCM) verifies that it has received the proper number of bytes for each ID.

• When Monitored:

  Continuously with the ignition on, one valid CAN ID received at least once, and no U0002-CAN Bus Off Performance DTC present.

• Set Condition:

  When the TCM detects an incorrect CAN ID from the Steering Control Module (SCM).

Always perform the NAG1 Pre-Diagnostic Troubleshooting procedure before proceeding. (Refer to 28 - DTC-Based Diagnostics/MODULE, Transmission Control (TCM) - Standard Procedure).

Diagnostic Test

1. CHECK IF TIPM CAN BUS DTCS

• Refer to the TIPM DTC Based Diagnostics and perform the appropriate diagnostic procedure.
• Perform TRANSMISSION VERIFICATION TEST. (Refer to 28 - DTC-Based Diagnostics/MODULE, Transmission Control (TCM) - Standard Procedure).

• Go to .

2. CHECK IF SCM DTCS ARE PRESENT

• Refer to the SCM DTC Based Diagnostics and perform the appropriate diagnostic procedure.
• Perform TRANSMISSION VERIFICATION TEST. (Refer to 28 - DTC-Based Diagnostics/MODULE, Transmission Control (TCM) - Standard Procedure).

• Using the schematics as a guide, check the Transmission Control Module (TCM) connectors and terminals for corrosion, damage, or terminal push out. Pay particular attention to all power and ground circuits. If no problems are found, replace and program the TCM in accordance with the Service Information.
• Perform TRANSMISSION VERIFICATION TEST. (Refer to 28 - DTC-Based Diagnostics/MODULE, Transmission Control (TCM) - Standard Procedure).