WABCO iABS 2S/1M Standard, Maintenance Manual

Page: 61 / 188

61
Diagnostics
Blink
Code
SPN FMI
Suspect
Component
and Location
ITP
Function
Fault
Description
(FMI)
Cause Repair Information
6 6 11 Wheel
Speed
Sensor F
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.
6 6 12 Wheel
Speed
Sensor F
N/A Bad
Intelligent
Device or
Component
A non-plausible
sensor frequency
has been
measured.
- Check sensor wiring and
connectors for intermittent
contact.
- Check if brake at this location
is operating correctly, i.e.,
potentially dragging.
- Check for corroded or
damaged wiring between
the ECU and the ABS wheel
speed sensor.