ELECTRONICALLY CONTROLLED HYDRAULIC SYSTEMS
BOSCH ABS
38
2)Bleeding the hydraulic assembly.
IMPORTANT : the bleeding order must be observed, beginning with the rear right , then the rear left, front
left and then front right.
a)Bleed the rear right brake by bleeding the hydraulic assembly secondary circuit using the XR25:
- position the bleed container and the hose, open the brake bleed screw,
- pump the brake pedal (approximately ten times),
- start the bleed command on the
XR25,
- pump the brake pedal during the diagnostic bleed phase,
- at the end of the bleed cycle on the
XR25, continue to pump the brake pedal and close the brake
bleed screw.
b)Carry out the procedure described at a) for the rear left, front left and front right brakes.
c)Check the pedal travel and if it is incorrect, restart the bleeding procedure.
IMPORTANT : ensure there is sufficient brake fluid in the reservoir.
CHECKING THE WHEEL SPEED SENSORS
a)Check the resistance of the sensor connections (from the computer connector to the 2 track speed sensor
connector).
b)Visually inspect the teeth ( 26 teeth) on the target and if they are faulty, replace the target.
c)Check the air gap using a set of shims. Only the front sensors can be checked.
PRN3820
Front: 0.13 < Z < 1.96 mm
38-10
