A "Communication Failed" Error Occurs While Performing a Special Function

Symptom

When attempting to communicate with a Special Function using any diagnostic tool, the error message "Communication Failed" is displayed.

Cause:

This occurs when the diagnostic tool cannot establish normal communication with the vehicle system.

Solution:

1. Verify 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.