| | Test results |
| 1 | CHECK USING DIAGNOSTIC EQUIPMENT. | All OK | Problems encountered | Operation |
|---|
| Connect the Examiner diagnostic equipment to the diagnostic socket and check the following at the Body Computer Node:- that there are no faults at the Brake Lights
- the operation of the Brake Lights through active diagnosis
- the plausibility of the Brake Lights On/Off parameter
| Move on to Step 6 | 1. Presence of error at Brake Lights bulbs2. The lights do not come on3. The lights come on | 1. Continue following the instructions for the diagnostic equipment2. Move on to Step 23. Move on to Step 5 |
| 2 | ELECTRICAL SYSTEM CHECK. | All OK | Problems encountered | Operation |
|---|
| Check the continuity/insulation between the Body Computer Node and the rear brake lights See E2021 BRAKE LIGHTS | Move on to Step 3 | Wiring faulty | Restore the correct electrical connection |
| 3 | BRAKE LIGHT BULB CHECK | All OK | Problems encountered | Operation |
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| Bulb efficiency check | Move on to Step 4 | Brake light bulb fault | Replace the brake light bulbs |
| 4 | REAR LIGHTS CHECK | All OK | Problems encountered | Operation |
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| Check the condition of the rear light clusters | Move on to Step 5 | Rear light clusters faulty | Restore operation, replace lights if necessary |
| 5 | WIRING CHECK | All OK | Problems encountered | Operation |
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| Check the condition of the wiring between the brake light switch and the Body Computer | Move on to Step 6 | Wiring faulty. | Restore the correct electrical connection |
| 6 | CORRECT OPERATION CHECK | All OK | Problems encountered | Operation |
|---|
| Check that the fault is no longer present | End of diagnosis | The fault persists. | Replace body computer Op. 5505A32 BODY COMPUTER - R.R |