WABCO iABS 2S/1M Standard, Maintenance Manual

Page: 51 / 188

51
Diagnostics
Blink
Code
SPN FMI
Suspect
Component
and Location
ITP
Function
Fault
Description
(FMI)
Cause Repair Information
5 5 1 Wheel
Speed
Sensor E
N/A Air Gap Sensor air gap is
too large; sensor
output voltage is
too low but is high
enough to be read
by ECU.
- Adjust wheel sensor to touch
tone ring.
- Check condition of ABS
sensor head.
- Check for loose wheel
bearings or excessive hub
runout.
- Check mounting of ABS tone
ring and condition of teeth.
- Check condition and
retention of ABS sensor spring
clip.
- Check ABS sensor cable
routing and clipping.
- Turn the wheel at half a
revolution per second and
verify 0.2 AC volt sensor
output voltage.
5 5 2 Wheel
Speed
Sensor E
N/A Wheel
Speed
Difference
System has
detected a
signi
fi cant
difference in the
proportion of tire
diameter to number
of tone ring teeth
between wheel
ends.
- Check for tire size mismatch.
- Check for correct number of
tone ring teeth.
5 5 3 Wheel
Speed
Sensor E
N/A Shorted to
UBATT
Continuity between
the sensor
connection and
battery voltage
(short circuit) is
detected.
- Verify 900-2000 ohms
resistance through sensor
circuit.
- Verify no DC voltage through
sensor circuit Key ON.
- Check for corroded or
damaged wiring between
the ECU and the ABS wheel
speed sensor.