Test results

If the type of error is MUTE

Check:

- CAN line continuity

- Electric steering control unit connector (control unit disconnected from the network)

Go to Step 2

1. CAN line wiring interrupted

2. Electric steering control unit connector

1. Restore the CAN line continuity

2.Connect the electric steering control unit connector

If the type of error is 'BUS OFF'

Check for control unit errors using an Examiner in 'CAN information' mode

Check the insulation of the CAN High to earth

Check the insulation of the CAN Low to + battery

Go to Step 3

1. Network control unit faulty (CAN overloaded)

2. CAN short circuit to earth

3. Short circuit to + battery

1. Continue as instructed by the diagnostic equipment

2. Restore insulation to earth

3. Restore insulation to + battery

If the type of error is 'CAN adjustment'

Replace the electric steering control unit and check that it is working properly

 Op. 4110D20 STEERING ELECTRICAL CONTROL DEVICE - R R

End of diagnosis