A "Communication Failed" Error Occurs While Using Additional Functions

Symptom

When attempting to communicate with Additional Functions using any diagnostic tool, a "Communication Failed" error message is displayed.

Cause:

This occurs when communication with the vehicle system is not established properly.

Solution:

1. Check the specifications of the system installed in the vehicle, select the correct system, and try again.

2. Verify that the system is properly installed in the vehicle and check the circuit connections.