WABCO 400 500 320 0, Maintenance Manual

Page: 58 / 188

58
Diagnostics
Blink
Code
SPN FMI
Suspect
Component
and Location
ITP
Function
Fault
Description
(FMI)
Cause Repair Information
6 6 4 Wheel
Speed
Sensor F
N/A Shorted to
Ground
Continuity between
the sensor
connection and
ground (short
circuit) is detected.
- Check sensor, sensor cable
and connectors to verify no
loose or damaged connection.
- Verify 900-2000 ohms
resistance through sensor
circuit.
- Check for corroded or
damaged wiring between
the ECU and the ABS wheel
speed sensor.
- Swap sensor in question
with adjacent sensor at the
ECU. If the fault code stays
in the same location, replace
ECU. If the fault code changes
locations replace the suspect
sensor.
6 6 5 Wheel
Speed
Sensor F
N/A Open Circuit An open circuit
has been detected,
i.e. ECU detects a
disconnected wheel
speed sensor.
- Check sensor, sensor cable
and connectors to verify no
loose or damaged connection.
- Check for corroded or
damaged wiring between
the ECU and the ABS wheel
speed sensor.
- Check for corrosion or
discoloration at ECU sensor
pins and/or connector.
- Visually inspect sensor
extension female connector to
ensure it is not out of round or
spread resulting in intermittent
contact with the ECU sensor
pins.
- Verify 900-2000 ohms
resistance through sensor
circuit.
- Swap sensor in question
with adjacent sensor at the
ECU. If the fault code stays
in the same location, replace
ECU. If the fault code changes
locations, replace the suspect
sensor.