Description:

This diagnostic trouble code, PTQ 004309.14, indicates that when a range change is initiated, the vehicle unexpectedly changes direction. This issue may occur when driving on a slope, potentially due to unintended movement or control unit responses.

Reaction:

When this error is detected, the control unit responds by engaging the park lock to prevent unintended movement and ensure vehicle safety.

Recommendations:

Inspect Transmission and Range Change Mechanism:

• Check the transmission and range change mechanism for any signs of malfunction or misalignment.
• Repair or adjust the mechanism as needed to ensure proper operation.

Ensure Level Surface:

• Attempt range changes on a level surface to prevent unintended movement caused by slopes.
• Avoid making range changes while driving on steep inclines.

Verify Control Unit Function:

• Test the control unit for any faults or malfunctions that could cause unintended direction changes.
• Replace the control unit if it is found to be defective.

Update Software:

• Verify that the control software is up-to-date with the latest version.
• Update the software if there are any available updates to improve system accuracy and error handling.

Monitor Vehicle Behavior:

• After addressing the above steps, monitor the vehicle’s behavior during range changes to ensure it does not change direction unexpectedly.
• Confirm that the park lock engages correctly to prevent unintended movement.

Note:

• Regular inspection and maintenance of the transmission and control systems are essential to prevent issues during range changes.
• If the issue persists, consult technical support or the manufacturer for further assistance.