Component Tests and General Diagnostics

Multifunction Steering Wheel Troubleshooting

The Control Module in Steering Wheel E221 communicates with Steering Column Electronic Systems Control Module J527. Data commands are processed there once more for further communication.

Multifunction Steering Wheel has On Board Diagnostic (OBD) capabilities.

When performing fault-finding, use Vehicle Diagnosis, Testing and Information System (VAS 5051) or Vehicle Diagnosis and Service System (VAS 5052) or subsequent units in "Guided Fault Finding".

The Multifunction Steering Wheel is made up of the following components:





• the Control unit in the steering wheel with two button arrays with integrated electronics, left and right on the steering wheel.

• Control unit for Multifunction Steering Wheel.

• Before troubleshooting or servicing, technicians must be familiar with the functions and operation specifics of the Multifunction Steering Wheel. Always read the owner's manual and review specific Communication system functions.