194002009 - H002 DRIFT WHILST BRAKING

The vehicle tends to drift to the left or the right whilst braking. If necessary, carry out a road test on a straight, flat road without transverse gradients to check the effective drift
0PRELIMINARY CHECKSALL OKPROBLEMS ENCOUNTEREDACTION
First of all, check that the tyres are the correct type, in good condition and correctly inflated.Check that the wheel bolts are correctly fastened.Move on to Step 11. Tyre inflation pressure not correct1. Make sure tyres are inflated to the correct pressure.
2. Tyres unsuitable or worn2. Replace the tyresOp.
3. Wheel bolts not correctly fastened.3. Tighten the wheel studs correctly.
1BRAKING SURFACES CHECKALL OKPROBLEMS ENCOUNTEREDACTION
Check:

  • the condition of the front pads braking surfaces;
  • the condition of the rear pads braking surfaces;
Move on to Step 21. Brake surfaces vitrified or with traces of grease, oil or water1. 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
2FRONT DISCS AND CALIPERS CHECKALL OKPROBLEMS ENCOUNTEREDACTION
Check the condition of the front brake discs.Check the condition of the front brake caliper pistons.Move on to Step 31. Front discs worn or damaged1. 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. Front caliper pistons worn or seized.2. Replace the front brake calipersOp. 3310A32 FRONT BRAKE CALIPERS - R.R.
3REAR DISCS AND CALIPERS CHECKALL OKPROBLEMS ENCOUNTEREDACTION
Check the condition of the rear brake discs.Check the condition of the rear brake caliper pistons.Move on to Step 41. Rear discs worn or damaged.1. Regrind the discs or, if necessary, replace themOp. 3310B54 REAR BRAKE DISCS REMOVED - GRINDOp. 3310B52 REAR BRAKE DISCS - R+R WITH BRAKE CALIPERS REMOVED
2. Rear caliper pistons worn or seized.2. Replace the rear brake calipers.Op. 3310B34 REAR BRAKE CALIPERS - R + R - INCLUDES HANDBRAKE ADJUSTMENT
4CHECK USING DIAGNOSTIC EQUIPMENTALL OKPROBLEMS ENCOUNTEREDACTION
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 51. 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    See E7020 ABS
5ACTIVE DIAGNOSIS WITH DIAGNOSTIC EQUIPMENTALL OKPROBLEMS ENCOUNTEREDACTION
Connect the diagnostic equipment (Examiner or other instruments) and carry out the active diagnosis for:

  • Pump motor;
  • Solenoid valves.
Move on to Step 6Pump and/or solenoid valves faulty.Replace the electronic control unit electrohydraulic unit    Op. 3340A12 ABS HYDRAULIC AND ELECTRONIC CONTROL UNIT - R.R.
6FRONT GEOMETRY CHECKALL OKPROBLEMS ENCOUNTEREDACTION
Check the vehicle geometry and front wheel angles    Op. 4450A10 FRONT WHEEL GEOMETRY - CHECK USING OPTICAL EQUIPMENT - INCLUDES ADJUSTMENT IF NECESSARYMove on to Step 71. Geometry not correct.1. Check and, if necessary, replace the shock absorber    Op. 4410A12 FRONT SUSPENSION DAMPER (ONE), LH OR RH - FOR MCPHERSON STRUT SYSTEM - INCLUDES DISMANTLING/REASSEMBLY OF ASSEMBLY AT BENCH - R.R
2. Geometry not correctCheck and, if necessary, replace the springOp. 4410A14 FRONT SUSPENSION SPRING/DAMPER UNIT (ONE- REMAINING) - R+R FOLLOWING OPERATION 4410A10
3. Angles not correct.3. Restore correct anglesOp. 4450A20 FRONT WHEEL CASTER
7REAR GEOMETRY CHECKALL OKPROBLEMS ENCOUNTEREDACTION
Check the vehicle geometry and rear wheel angles    Op. 4450A40 REAR WHEEL GEOMETRY - CHECK USING OPTICAL EQUIPMENT, INCLUDES ADJUSTMENT IF NECESSARYEnd of diagnosis1. Geometry not correct.1. Check and, if necessary, replace the shock absorber    Op. 4420A30 REAR SUSPENSION SHOCK ABSORBER (ONE), LEFT OR RIGHT - R.R. - CHECK WHEEL GEOMETRY SEPARATELY
2. Geometry not correctCheck and, if necessary, replace the spring    Op. 4420A40 L/H OR R/H REAR SUSPENSION COIL SPRING (ONE) - R+R
3. Angles not correct.3. Restore correct angles    Op. 4450A40 REAR WHEEL GEOMETRY - CHECK USING OPTICAL EQUIPMENT, INCLUDES ADJUSTMENT IF NECESSARY