| 1 | CHECK USING DIAGNOSTIC EQUIPMENT | All OK | Problems encountered | Operation |
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| Using an Examiner check that there are no errors in Body Computer mode. | Move on to Step 2 | Presence of errors. | Continue as instructed by the diagnostic equipment. |
| 2 | CLOCK SPRING WIRING CHECK | All OK | Problems encountered | Operation |
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| Check the continuity of the wiring between the Body Computer and the clock spring. Earth at the radio controls. | Move on to Step 3 | 1. Clock spring broken.2. Earth connection at radio controls interrupted.3. Continuity of wiring between Body Computer and control panel. | 1. Replace the clock spring.2. Restore the continuity of the wiring between the Body Computer and the clock spring.3. Renew the wiring between the control panel and the Body Computer. |
| 3 | OPERATION CHECK | All OK | Problems encountered | Operation |
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| Check using the Examiner connected to the Body Computer control unit that the buttons are working properly even when steering. | End of diagnosis. | 1. One of the buttons on the steering wheel control is faulty.2. Fault when steering.3. Fault persists. | 1. Replace control panel on steering wheel Op. 5570T66 MODULE (ONE) ON STEERING WHEEL FOR RADIO CONTROL - R+R 2. Replace the clock spring.3. Move on to Step 4 |
| 4 | BODY COMPUTER OPERATION CHECK | All OK | Problems encountered | Operation |
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| Check that the body computer is working properly. | End of diagnosis. | Body Computer defective. | Replace Body Computer Op. 5505A35 MAIN BODY COMPUTER/JUNCTION UNIT - R.R. |
| 5 | ELECTRICAL POWER SUPPLY CHECK | All OK | Problems encountered | Operation |
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| Check that the controls on the steering wheel are receiving the correct power supply See E3510 RADIO | Move on to Step 6. | Fault in positive electrical supply and/or earth. | Replace defective component (in the case of a fuse, find out what caused it to blow). |
| 6 | ELECTRICAL CONNECTIONS CHECK | All OK | Problems encountered | Operation |
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| Check the condition of the system wiring and the electrical connections involved, in particular that each individual pin is properly connected See E3510 RADIO | Move on to Step 7. | 1. Electrical connections not operational.2. Wiring (clock spring) faulty. | 1. Renew the damaged electrical connections.2. Restore the correct operation of the wiring. |
| 7 | CORRECT OPERATION CHECK | All OK | Problems encountered | Operation |
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| Check that the fault is no longer present. | End of diagnosis. | The fault persists. | Replace the controls on the steering wheel Op. 5570T66 MODULE (ONE) ON STEERING WHEEL FOR RADIO CONTROL - R+R |