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Test results |
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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 2. Tyres unsuitable or worn |
1. Make sure tyres are inflated to the correct pressure 2. Replace the tyres |
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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 Op. 3340B ABS SYSTEM PIPES |
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Connect the Examiner diagnostic equipment to the diagnostic socket. Check that there are no faults in the ABS control unit |
Move on to Step 3 |
1. Error detected in the control unit 2. No communication with the control unit |
1. Continue following the instructions on the diagnostic equipment 2. Restore: - Connection between the ABS control unit and the diagnostic connector; - ABS control unit supply See E7020 ABS |
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Keeping the Examiner diagnostic equipment connected, carry out active diagnosis of: - 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. |
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Check: - the condition of the pad braking surfaces; - type of pads |
Move on to Step 5 |
1. Brake surfaces vitrified or with traces of grease, oil or water 2. Front pads damaged or not the recommended type 3. Rear pads damaged or not the recommended type |
1. Clean again, check and remove the causes of the fault 2. Replace the front pads Op. 3310A60 FRONT BRAKE PADS - REPLACE 3. Replace the rear pads Op. 3310B62 REAR BRAKE PADS - REPLACE |
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Check the condition of the brake discs |
Move on to Step 6 |
1. Front discs worn or damaged 2. Rear discs worn or damaged |
1. Replace the front discs Op. 3310A48 FRONT BRAKE DISC (ONE), LEFT OR RIGHT - R.R 2. Replace the rear discs Op. 3310B48 REAR BRAKE DISC (ONE), LEFT OR RIGHT - R.R. |
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Check the condition of the front and rear brake calliper control pistons |
End of diagnosis |
1. Front calliper pistons worn or seized 2. Rear calliper pistons worn or seized |
1. Replace the front brake callipers Op. 3310A30 FRONT BRAKE CALIPER (ONE) - R.R 2. Replace the rear brake callipers Op. 3310B36 REAR BRAKE CALIPER (ONE), LEFT OR RIGHT - R.R |
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Check that the vacuum pipe is correctly fitted/in good condition |
Proceed to Step 10 |
1. Pipe not fitted correctly or bent 2. Pipe damaged |
1. Refit correctly 2. Replace vacuum pipe Op. 3330D26 VACUUM PIPE FOR BRAKE SERVO ASSEMBLY - R.R |
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Check that the brake servo single-acting valve is working properly |
Proceed to Step 11 |
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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Check that the brake servo is working properly See Test 3330DA CHECK ON OPERATION OF VACUUM PUMP AND VACUUM CIRCUIT FOR BRAKE SERVO |
Move on to Step 12 |
Brake servo not working properly |
Replace brake servo Op. 3330D10 BRAKE SERVO - R+R - INCLUDES SEPARATION FROM MASTER CYLINDER (PUMP) |
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Check the vacuum circuit reading |
Move on to Step 13 |
Vacuum figure not correct |
Replace the brake servo vacuum pump Op. 3330D30 VACUUM UNIT - R.R. |
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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 |
End of diagnosis |
Bends or constrictions present, the fluid does not come out evenly |
Replace the section of pipe affected by the problem, see Op. 3340B ABS SYSTEM PIPES |
