| 0 | PRELIMINARY CHECKS | ALL OK | PROBLEMS ENCOUNTERED | ACTION |
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| First of all, check that the tyres are the correct type, in good condition and correctly inflated | Move on to Step 1 | 1. Pressure not correct | 1. Make sure tyres are inflated to the correct pressure. |
| 2. Tyres unsuitable or worn | 2. Replace the tyres. |
| 1 | BRAKE FLUID LEAK CHECK | ALL OK | PROBLEMS ENCOUNTERED | ACTION |
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| Visually check:- The level of the brake fluid in the reservoir;
- No fluid leaks from the brake pump, the pipes or the system connectors
| Move on to Step 2 | Leaks in the system. | Tighten the connectors or replace the damaged parts, see Assembly Op. 3340B ABS SYSTEM PIPES |
| 2 | CHECK USING DIAGNOSTIC EQUIPMENT | ALL OK | PROBLEMS ENCOUNTERED | ACTION |
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| Connect the diagnostic test equipment (Examiner or other instruments) to the tester input.Check that there are no faults in the ABS control unit. | Move on to Step 3 | 1. Error detected in the control unit. | 1. Continue following the instructions for the diagnostic equipment |
| 2. No communication with the control unit. | 2. Restore:- Connection between the ABS control unit and the diagnostic connector;
- ABS control unit supply
See E7020 ABS See E7020 ABS |
| 3 | ACTIVE DIAGNOSIS WITH DIAGNOSTIC EQUIPMENT | ALL OK | PROBLEMS ENCOUNTERED | ACTION |
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| Connect the diagnostic equipment (Examiner or other instruments) and carry out the active diagnosis for:- Pump motor;
- Solenoid valves.
| Move on to Step 4 | Fault detected in the pump or in a solenoid valve. | Replace the electrohydraulic unit - ABS electronic control unit Op. 3340A12 ABS HYDRAULIC AND ELECTRONIC CONTROL UNIT - R.R. |
| 4 | CHECK ON TYPE OF PADS AND SURFACE | ALL OK | PROBLEMS ENCOUNTERED | ACTION |
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| Check:- Condition of the braking surfaces and pads.
- Type of pads.
| Move on to Step 5 | 1. Brake surfaces vitrified or with traces of grease, oil or water | 1. Clean again, check and remove the causes of the fault |
| 2. Front pads damaged or not the recommended type | 2. Replace the front pads Op. 3310A60 FRONT BRAKE PADS - REPLACE |
| 3. Rear pads damaged or not the recommended type. | 3.Replace the rear pads Op. 3310B62 REAR BRAKE PADS - REPLACE |
| 5 | CHECK DISCS | ALL OK | PROBLEMS ENCOUNTERED | ACTION |
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| Check the condition of the brake discs. | Move on to Step 6 | 1. Front discs worn or damaged. | 1. Regrind the discs or, if necessary, replace themOp. 3310A54 FRONT BRAKE DISCS REMOVED - GRINDOp. 3310A52 FRONT BRAKE DISCS - R+R WITH BRAKE CALIPERS REMOVED |
| 2. Rear discs worn or damaged. | 2. Regrind the discs or, if necessary, replace themOp. 3310B54 REAR BRAKE DISCS REMOVED - GRINDOp. 3310B52 REAR BRAKE DISCS - R+R WITH BRAKE CALIPERS REMOVED |
| 6 | BRAKE CALIPER CHECK | ALL OK | PROBLEMS ENCOUNTERED | ACTION |
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| Check the condition of the front and rear brake caliper pistons. | Move on to Step 7 | 1. Front caliper pistons worn or seized. | 1. Replace the front brake calipers.Op. 3310A32 FRONT BRAKE CALIPERS - R.R. |
| 2. Rear discs worn 2. Rear caliper pistons worn or seized. | 2. Replace the rear brake calipers.Op. 3310B34 REAR BRAKE CALIPERS - R + R - INCLUDES HANDBRAKE ADJUSTMENT |
| 7 | VACUUM PIPE CHECK | ALL OK | PROBLEMS ENCOUNTERED | ACTION |
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| Check that the vacuum pipe is correctly fitted/in good condition. | Move on to Step 8 | 1. Pipe not fitted correctly or bent. | 1. Fit correctly |
| 2. Pipe damaged. | 2. Replace vacuum pipeOp. 3330D24 VACUUM PIPE FOR BRAKE SERVO - R+R |
| 8 | BRAKE SERVO SINGLE-ACTING VALVE CHECK | ALL OK | PROBLEMS ENCOUNTERED | ACTION |
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| Check that the brake servo single-acting valve is working properly. | Move on to Step 9 | Single-acting valve not working properly. | Replace the single-acting valve Op. 3330D20 SINGLE-ACTING VALVE FOR BRAKE SERVO - R+R |
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| 9 | BRAKE SERVO CHECK | ALL OK | PROBLEMS ENCOUNTERED | ACTION |
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| Check that the brake servo is working properly, see Test See Test 3330DA CHECK VACUUM PUMP OPERATION AND BRAKE SERVO VACUUM CIRCUIT | Move on to Step 10 | Brake servo not working properly. | Replace brake servoOp. 3330D10 BRAKE SERVO - R+R - INCLUDES SEPARATION FROM MASTER CYLINDER (PUMP) |
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| 10 | ENGINE VACUUM CHECK | ALL OK | PROBLEMS ENCOUNTERED | ACTION |
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| Check the vacuum circuit reading. | Move on to Step 11 | Vacuum figure not correct. | Replace the brake servo vacuum unit Op. 3330D30 VACUUM PUMP - R+R |
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| 11 | CHECK ON FLEXIBLE BRAKE PIPES AND BLEEDING | ALL OK | PROBLEMS ENCOUNTERED | ACTION |
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| Visually inspect that there are no bends or constrictions in the brake pipes, bleed the system and check that the fluid comes out evenly from the bleed screws. Op. 0010T65 HYDRAULIC BRAKE SYSTEM - BLEED AIR | End of diagnosis | Bends or constrictions present, the fluid does not come out evenly. | Replace the section of pipe affected by the problem, see Assembly Op. 3340B ABS SYSTEM PIPES |
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