2427492 - H02 DRIFT WHILST BRAKING

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Results of the tests
0PRELIMINARY CHECKSAll OKProblems metOperation
Check that the brake pedal is not too softContinue to Step 1Brake pedal too softContinue according to the instructions in See table F10 EXCESSIVE BRAKE PEDAL FREE PLAY
1CHECK FOR OIL LEAKSAll OKProblems metOperation

Check that there are no fluid leaks from:

  • calipers;
  • wheel cylinders;
  • master cylinder
Continue to Step 2Fluid leak from a caliperReplace the faulty caliper ( Op.   3310A30  )
Fluid leak from a wheel cylinderReplace the faulty wheel cylinder ( Op.   3320B20  )
2CHECK ON BRAKE WEARAll OKProblems metOperation
Check the brakes for wearContinue to Step 3Brakes very wornOverhaul the brakes
3CHECK ON WHEEL GEOMETRYAll OKProblems metOperation
Check the geometry and track of the wheel axleContinue to Step 4Wheel geometry incorrectRestore the correct wheel geometry ( Op.   4450A10  )
Wheel geometry incorrectRestore the correct wheel geometry ( Op.   4450A40  )
Wheel geometry incorrectRestore the correct wheel geometry ( Op.   4450A90  )
4CHECK LOCKING OF REAR WHEELSAll OKProblems metOperation
Carry out a braking action and check that the rear wheels do not lockContinue to Step 5The rear wheel lockAdjust ( Op. 3330C62)
The rear wheel lockIf necessary replace the brake self-adjuster ( Op. 3330C60)
5CHECKING WITH DIAGNOSTIC EQUIPMENTAll OKProblems metOperation
Connect the diagnostic equipment (Examiner or other instruments) to the diagnostic socketCheck that there are no faults in the ABS control unitContinue to Step 6Lack of dialogue with the control unitContinue according to 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 )
6CHECK ON DRIFTAll OKProblems metOperation
Disconnect the ABS hydraulic control unitCheck whether there is drifting during braking at variable speedsContinue to Step 7Vehicle does not drift during brakingReplace the ABS hydraulic control unit ( Op. 3340A10)Note: Carry out filling with the diagnostic instrument in active diagnosis
7CHECK ON CORRECT OPERATIONAll OKProblems metOperation
Check that the fault is no longer present
The test is essential, as the braking system is a safety feature of the car
End of diagnosisFault persistsSearch for the fault starting from another symptom'