|  |  | Test results | 
| 1 | OPERATION CHECK | All OK | Problems encountered | Operation | 
|---|
|  | Using the controls on the steering wheel, check the correct operation, even in steering conditions | Move on to Step 2 | 1. One of the controls on the steering wheel faulty2. All the controls on the steering wheel faulty | 1. Move on to Step 22. Move on to Step 3 | 
| 2 | STEERING WHEEL MODULE CHECK | All OK | Problems encountered | Operation | 
|---|
|  | Check the following, in order:- Correct power supply for the module on the steering wheel- Continuity of the wiring- Operation of controls on the steering wheel    See E3510  RADIO | Move on to Step 3 | 1. Wiring faulty2. Controls on the steering wheel faulty | 1. Restore the wiring to correct operation2. Repair / replace the controls on the steering wheel | 
| 3 | RADIO MODULE CHECK | All OK | Problems encountered | Operation | 
|---|
|  | Check that the reception of the signals from the module on the steering wheel is correct at the radio connector    See E3510  RADIO | End of diagnosis | Controls from radio steering wheel conversion module faulty | Replace the radio    Op. 5570T80  CAR RADIO EQUIPMENT - R+R |