B76531.0
ELECTRONICALLY CONTROLLED HYDRAULIC SYSTEM
Fault finding - Customer Complaints38
ABS BOSCH
5.3
AFTER REPAIR Carry out a road test, then a check with the XR25 kit.
WARNING LIGHT FAULTS
ABS warning light does not illuminate for 3 seconds after ignition switched on. Chart 1
Chart 2 Permanent illumination of ABS warning light .
Chart 3
FAULTS NOTED WHEN BRAKING WITH ABS REGULATION
Locking of one or more wheels.Chart 4
Pulling.
Chart 6 Wandering.
Chart 7
Unexpected ABS operation when using special equipment
(mobile phone,CB...).
Chart 9
OTHER CASES
ABS warning light does not illuminate, computer disconnected.Chart 14
No communication with ABS computer.
Chart 15 Only consult this section after a complete check with the XR25 kit.
NOTES
ABS warning light illuminates again after engine starts.
Unexpected ABS operation at low speed and little force applied to brake.
Unexpected ABS operation on poor road surface.
Extension of brake pedal travel following a regulation phase
(with an irregular pedal when regulation begins).
Chart 5
Chart 8
Chart 10
Spongy pedal.
Brake pedal vibration.
Noise from pump, pipes or hydraulic assembly .
Chart 11
Chart 12
Chart 13 Chart 3 Temporary illumination of ABS warning light when driving.
38-20
B76531.0
ELECTRONICALLY CONTROLLED HYDRAULIC SYSTEM
Fault finding - Fault chart 38
ABS BOSCH
5.3
AFTER REPAIR Carry out a road test, then a check with the XR25 kit.
UNEXPECTED ABS OPERATION WHEN USING SPECIAL
EQUIPMENT (MOBILE PHONE,CB...)Fault chart 9
Check that equipment causing the problem during use is approved.
Check that this equipment has been correctly installed without modification to the original wiring, in
particular, that of the ABS (connections to earth and + after ignition/ before ignition of the ABS are not
permitted).
Only consult this section after a complete check with the XR25 kit.NOTES
38-29
