3022610 - H02 DRIFT WHILST BRAKING

During braking, the car pulls to the right and/or left
Results of the tests
0PRELIMINARY CHECKSAll OKProblems metOperation
Check that the brake pedal is not too softContinue to Step 1Brake pedal too soft See table   F10  EXCESSIVE BRAKE PEDAL FREE PLAY
1CHECK FOR FLUID LEAKSAll OKProblems metOperation

Check that there are no fluid leaks from:

  • calipers
  • master cylinder - condition of braking system
Continue to Step 2Fluid leak from a front caliperReplace the faulty caliper Op.   3310A30 
Fluid leak from a rear caliperReplace the faulty caliper Op.   3310B36 
2CHECK ON BRAKE WEARAll OKProblems metOperation
Check the state of wear of the brakes - condition of brake surfacesContinue to Step 3Brakes very wornOverhaul the brakes
Discs vitrified or with traces of greaseClean and check for causes
3CHECK WHEEL GEOMETRYAll OKProblems metOperation
Check the geometry and track of the wheel axleContinue to Step 4Front wheel geometry outside limitsRestore the correct front wheel geometry Op.   4450A10 
Rear wheel geometry incorrectRestore the correct rear wheel geometry Op.   4450A40 
4CHECKING WITH DIAGNOSTIC EQUIPMENTAll OKProblems metOperation
Connect diagnostic equipment (Examiner or other instruments) to the diagnostic socket.Check that there are no faults in the ABS control unitContinue to Step 5An error is detected in the control unitContinue following the instructions for the diagnostic equipment
Lack of dialogue with the control unitRestore the connection between the engine management control unit and the diagnostic connector See   E7020  ABS
5CHECK ON DRIFTAll OKProblems metOperation
Disconnect the ABS control unit.Check whether the vehicle still drifts during braking at variable speedsContinue to Step 6Vehicle does not drift during brakingReplace ABS control unit Op.   3340A12  Note: Carry out filling with the diagnostic instrument in active diagnosis
6CHECK ON CORRECT OPERATIONAll OKProblems metOperation
Test the vehicle before delivery to the customer, to check that the fault is no longer present.
The test is essential, as the braking system involves a safety feature of the car
Fault persistsSearch for the fault starting from another symptom'