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| 0 | PRELIMINARY CHECKS | All OK | Problems encountered | Operation |
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| Check that the ABS warning light comes on and goes out during the initial testConnect the diagnostic equipment and check the following at the CAN INFORMATION:- No control units inactive- No faulty control units- No control units with faulty CAN line | Move on to Step 5 | The ABS warning light also remains on | Proceed as instructed in the See table K062 ABS AND HANDBRAKE WARNING LIGHTS BOTH ON |
| Fault on CAN network | Continue following the instructions for the diagnostic equipment |
| Communication impossible with the Body Computer | Move on to Step 2 |
| 1 | CHECK USING DIAGNOSTIC EQUIPMENT | All OK | Problems encountered | Operation |
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| Keeping the diagnostic equipment connected, check the plausibility of the brake fluid level parameter at the Body Computer Node | Move on to Step 4 | The parameter is not plausible | Replace body computer Op. 5505A32 BODY COMPUTER - R.R |
| Impossible to connect to the Body Computer control unit. | Move on to Step 2 |
| 2 | ELECTRICAL POWER SUPPLY CHECK | All OK | Problems encountered | Operation |
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| Check the electricity supply to the Body Computer Node is correct | Move on to Step 3 | Fault in positive electrical supply and/or earth | Replace the defective component (in the case of a fuse, find out what caused it to blow) |
| 3 | CHECK USING DIAGNOSTIC EQUIPMENT | All OK | Problems encountered | Operation |
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| Using the diagnostic equipment, check the possibility of connection to the Body Computer Node | Move on to Step 1 | Impossible to connect to the Body Computer control unit. | Replace Body Computer Op. 5505A32 BODY COMPUTER - R.R |
| 4 | CHECK ON CORRECT OPERATION | All OK | Problems encountered | Operation |
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| Check that the fault is no longer present | End of diagnosis | The fault persists | Move on to Step 5 |
| 5 | BRAKE FLUID LEVEL CHECK | All OK | Problems encountered | Operation |
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| Check that the brake fluid level is not low | Move on to Step 9 | Insufficient brake fluid level | Move on to Step 6 |
| 6 | BRAKE FLUID LEVEL TOP UP | All OK | Problems encountered | Operation |
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| Top up the brake fluid level and check that the warning light goes out | End of diagnosis | The warning light does not go out | Move on to Step 7 |
| 7 | CHECK USING DIAGNOSTIC EQUIPMENT | All OK | Problems encountered | Operation |
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| Keeping the diagnostic equipment connected, check that there are no CAN faults at the BRAKE NODE | Move on to Step 8 | Fault on C-CAN network | Move on to Step 14 |
| 8 | ELECTRICAL SYSTEM CHECK | All OK | Problems encountered | Operation |
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| Disconnect the connector from the oil level sensor and check that it is working properly See Test 3330AA Checking the low brake fluid sensor sensor | Move on to Step 9 | Brake fluid level sensor defective | Replace the sensor |
| 8 | ELECTRICAL SYSTEM CHECK | All OK | Problems encountered | Operation |
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| Disconnect the connector from the oil level sensor and check that it is working properly See Test 3330AA Checking the low brake fluid sensor sensor | Move on to Step 9 | Brake fluid level sensor defective | Replace the sensor |
| 9 | ELECTRICAL SYSTEM CHECK | All OK | Problems encountered | Operation |
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| Check the continuity of the cable from the connector to the Body Computer See E4010 INSTRUMENT PANEL | Move on to Step 10 | Lead broken | Repair the connection See E4010 INSTRUMENT PANEL |
| 10 | CHECK USING DIAGNOSTIC EQUIPMENT | All OK | Problems encountered | Operation |
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| Connect the diagnostic equipment and check the plausibility of the handbrake applied parameter at the Body Computer Node | Move on to Step 11 | The parameter is not plausible | Move on to Step 15 |
| 11 | CHECK USING DIAGNOSTIC EQUIPMENT | All OK | Problems encountered | Operation |
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| Connect the diagnostic equipment or keep it connected and check the operation of the brake fluid level warning light in active diagnosis at the Instrument Panel Node | Move on to Step 12 | The warning light does not flash | Replace instrument panel Op. 5560B10 CONTROL PANEL - R+R |
| 12 | ELECTRICAL POWER SUPPLY CHECK | All OK | Problems encountered | Operation |
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| Check the electricity supply to the Instrument Panel Node is correct | Move on to Step 13 | Fault in positive electrical supply and/or earth | Replace the defective component (in the case of a fuse, find out what caused it to blow) |
| 13 | CHECK ELECTRICAL CONNECTIONS | All OK | Problems encountered | Operation |
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| Check the wiring between the Body Computer and the Instrument Panel. In particular, check that each individual pin is properly connected | Move on to Step 14 | Electrical connections not operational | Renew the damaged electrical connections |
| 14 | CHECK USING DIAGNOSTIC EQUIPMENT | All OK | Problems encountered | Operation |
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| Keeping the diagnostic equipment connected, check the plausibility of the brake fluid level parameter at the Body Computer Node | Move on to Step 15 | The parameter is not plausible | Replace body computer Op. 5505A32 BODY COMPUTER - R.R |
| 15 | ELECTRICAL SYSTEM CHECK | All OK | Problems encountered | Operation |
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| Check the insulation to earth of the wiring between the Handbrake lever switch and the Body Computer | Move on to Step 16 | Wiring not insulated | Restore wiring See E4010 INSTRUMENT PANEL |
| 16 | SWITCH CHECK | All OK | Problems encountered | Operation |
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| Check the condition of the switch on the handbrake lever | Move on to Step 17 | Switch defective | Replace the switch Op. 5550D18 HANDBRAKE ON WARNING LIGHT SWITCH - R+R |
| 17 | ACTIVE DIAGNOSIS CHECK | All OK | Problems encountered | Operation |
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| With the Examiner in the Instrument Panel Node ambient check that the handbrake warning light is correctly activated in Active Diagnosis. | Move on to Step 19 | The handbrake warning light does not flash | Replace the Instrument Panel Op. 5560B10 CONTROL PANEL - R+R |
| Impossible to connect with the Instrument Panel Node | Move on to Step 18 |
| 18 | CHECK USING DIAGNOSTIC EQUIPMENT | All OK | Problems encountered | Operation |
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| Using an Examiner check, in Instrument Panel mode, that there are no errors and that the parameters are present | Move on to Step 19 | Presence of errors | Continue following the instructions on the diagnostic instrument |
| 19 | CHECK USING DIAGNOSTIC EQUIPMENT | All OK | Problems encountered | Operation |
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| Using the Examiner check, in the Body Computer ambient, that there are no errors and that the parameter specified varies | Move on to Step 10 | Presence of errors | Continue by following the instructions on the diagnostic instrument |
| The parameters do not change | Move on to Step 10 |
| 20 | CHECK ON CORRECT OPERATION | All OK | Problems encountered | Operation |
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| Check that the fault is no longer present | End of diagnosis | The fault persists | Replace Body Computer Op. 5505A32 BODY COMPUTER - R.R |