WABCO iABS 2S/1M Standard, Maintenance Manual

Page: 43 / 188

43
Diagnostics
Blink
Code
SPN FMI
Suspect
Component
and Location
ITP
Function
Fault
Description
(FMI)
Cause Repair Information
3 3 10 Wheel
Speed
Sensor C
N/A Speed Jump
Upwards or
Downwards
Wheel speed
difference.
- Adjust wheel speed sensor
until it touches the tone ring.
- Check for loose wheel
bearings or excessive hub
runout.
- Check sensor wiring and
connectors for intermittent
contact.
- Check condition of ABS
sensor head.
- Check mounting of tone ring
and condition of teeth.
- Check condition and
retention of ABS sensor spring
clip.
- Check ABS sensor cable
routing and clipping.
- Check for corroded or
damaged wiring between
the ECU and the ABS wheel
speed sensor.
- Turn the wheel at half a
revolution per second and
verify 0.2 AC volt sensor
output voltage.
3 3 11 Wheel
Speed
Sensor C
N/A Abnormal
Speed
(Chatter)
Brake drag or
chatter has been
detected. Abnormal
vibrations detected
which affect sensor
signal.
- Check for loose wheel
bearings or excessive hub
runout.
- Check sensor wiring and
connectors for intermittent
contact.
- Check mounting of tone ring
and condition of teeth.
- Check condition and
retention of ABS sensor spring
clip as well as the mounting
block.
- Check for corroded or
damaged wiring between
the ECU and the ABS wheel
speed sensor.
- Turn the wheel at half a
revolution per second and
verify 0.2 AC volt sensor
output voltage.