WORKING ON THE ABS/PBS SYSTEM
Page : 24
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4.
Fault code 129: Wheel locking too long
Front wheel turns freely
NO
YES
Operate the front brake and release
it, the wheel turns freely
NO
Check: The brake caliper, pads,
disc, levers
YES
Using the diagnostic tool, operate
the control unit pump, without
braking. Front wheel turns freely
NO
Change the control unit
YES
The speed sensor and its harness
are in good condition visually
- Check there is a voltage on the
sensor terminals (between
terminals 12 and 21 of the ECU)
when the wheel is turned by hand
- Check the harness
- Check the sensor gap
- Check the condition of the pulse
wheel
NO
Change the faulty components
YES
Change the control unit
5.
Fault code 130: No wheel speed information
- Check there is a voltage on the
sensor terminals (between
terminals 12 and 21 of the ECU)
when the wheel is turned by hand
YES
Change the control unit
NO
Check:
The speed sensor harness
continuity
- The speed sensor condition
- The condition of the pulse wheel
- The sensor gap is 0.95
±0.75
mm
