199000768 - F001 POOR BRAKING ACTION

As the pressure exerted on the brake pedal increases, there is no noticeable corresponding braking action
Results of the tests
0PRELIMINARY CHECKSAll OKProblems encounteredOperation
First of all, check that the tyres are the correct type, in good condition and correctly inflatedMove on to Step 11. Pressure not correct2. Tyres unsuitable or worn1. Make sure tyres are inflated to the correct pressure2. Replace the tyres
1BRAKE FLUID LEAK CHECKAll OKProblems encounteredOperation
For the 1.9 JTD;Visually check:- The level of the brake fluid in the reservoir;- No fluid leaks from the brake pump, the pipes or the system connectorsMove on to Step 2Leaks in the systemTighten the connectors or replace the damaged parts, see    Op. 3340B ABS SYSTEM PIPES
1BRAKE FLUID LEAK CHECKAll OKProblems encounteredOperation
For the 1.2 8v, 1.4 8v , 1.3 JTD;Visually check:- The level of the brake fluid in the reservoir;- No fluid leaks from the brake pump, the pipes or the system connectorsMove on to Step 7Leaks in the systemTighten the connectors or replace the damaged parts, seeOp. 3330E HYDRAULIC BRAKING SYSTEM PIPES
2CHECK USING DIAGNOSTIC EQUIPMENTAll OKProblems encounteredOperation
For the 1.9 JTD;Connect the Examiner diagnostic equipment to the diagnostic socket.Check that there are no faults in the ABS control unitMove on to Step 31. Error detected in the control unit2. No communication with the control unit1. Continue following the instructions for the diagnostic equipment2. Restore:- Connection between the ABS control unit and the diagnostic connector;- ABS control unit supply    See E7020 ABS
3ACTIVE DIAGNOSIS WITH DIAGNOSTIC EQUIPMENTAll OKProblems encounteredOperation
For the 1.9 JTD;Keeping the Examiner diagnostic equipment connected, carry out the active diagnosis of:- Pump motor;- Solenoid valvesMove on to Step 4Fault detected in the pump or in a solenoid valveReplace the electrohydraulic unit - ABS electronic control unit    Op. 3340A12 ABS HYDRAULIC AND ELECTRONIC CONTROL UNIT - R.R.
4CHECK ON TYPE OF PADS AND SURFACEAll OKProblems encounteredOperation
For the 1.9 JTD;Check:- the condition of the pad braking surfaces;- type of padsMove on to Step 51. Brake surfaces vitrified or with traces of grease, oil or water2. Front pads damaged or not the recommended type3. Rear pads damaged or not the recommended type1. Clean again, check and remove the causes of the fault2. Replace the front pads    Op. 3310A60 FRONT BRAKE PADS - REPLACE 3. Replace the rear pads    Op. 3310B62 REAR BRAKE PADS - REPLACE
5CHECK DISCSAll OKProblems encounteredOperation
For the 1.9 JTD;Check the condition of the brake discsMove on to Step 61. Front discs worn or damaged2. Rear discs worn or damaged1. 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.
6BRAKE CALIPER CHECKAll OKProblems encounteredOperation
Check the condition of the front and rear brake caliper pistonsEnd of diagnosis1. Front caliper pistons worn or seized2. Rear caliper pistons worn or seized1. Replace the front brake calipers    Op. 3310A30 FRONT BRAKE CALIPER (ONE) - R.R 2. Replace the rear brake calipers    Op. 3310B36 REAR BRAKE CALIPER (ONE), LEFT OR RIGHT - R.R
7CHECK THE WEAR OF THE FRICTION SEGMENTSAll OKProblems encounteredOperation
For the 1.2 8v, 1.4 8v , 1.3 JTD;Check the wear of the friction segments through the openings in the brake back plate or the drumMove on to Step 8Friction segments wornBrake shoe replacement
8CHECKS ON THE DRUMAll OKProblems encounteredOperation
For the 1.2 8v, 1.4 8v , 1.3 JTD;Proceed with dismantling the drum to check the operation of the cylinder(s) checking the operation of the pistonsMove on to Step 9Incorrect operation of cylinderReplace the cylinder    Op. 3320B20 REAR BRAKE SHOE CYLINDER (ONE) LEFT OR RIGHT - REPLACE.
9VACUUM PIPE CHECKAll OKProblems encounteredOperation
For the 1.9 JTD;Check that the vacuum pipe is correctly fitted/in good conditionMove on to Step 101. Pipe not fitted correctly or bent2. Pipe damaged1. Refit correctly2. Replace vacuum pipe    Op. 3330D26 VACUUM PIPE FOR BRAKE SERVO ASSEMBLY - R.R
10BRAKE SERVO SINGLE-ACTING VALVE CHECKAll OKProblems encounteredOperation
For the 1.9 JTD;Check that the brake servo single-acting valve is working properlyMove on to Step 11Single-acting valve not working properlyReplace the single-acting valve    Op. 3330D20 SINGLE-ACTING VALVE FOR BRAKE SERVO - R+R
11BRAKE SERVO CHECKAll OKProblems encounteredOperation
For the 1.9 JTD;Check that the brake servo is working properly    See Test 3330DA CHECK VACUUM PUMP OPERATION AND BRAKE SERVO VACUUM CIRCUITMove on to Step 12Brake servo not working properlyReplace brake servo    Op. 3330D02 BRAKE SERVO/BRAKE PUMP ASSEMBLY - R.R.
12ENGINE VACUUM CHECKAll OKProblems encounteredOperation
For the 1.9 JTD;Check the vacuum circuit readingMove on to Step 13Vacuum figure not correctReplace the brake servo vacuum unit    Op. 3330D30 VACUUM UNIT - R+R
13CHECK ON FLEXIBLE BRAKE PIPES AND BLEEDINGAll OKProblems encounteredOperation
For the 1.9 JTD;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 diagnosisBends or constrictions present, the fluid does not come out evenlyReplace the section of pipe affected by the problem, see    Op. 3340B ABS SYSTEM PIPES