XJ (X350) V8-4.2L (2005)
Wheel Speed Sensor: Technical Service Bulletins
ABS/TCS - Wheel Speed Sensor Diagnostics
NUMBER
XJ100-014
MODEL
XJ Range
DATE
07 Dec 2OO6
SECTION: 100-00 - GENERAL INFORMATION
Wheel Speed Sensor Concerns Diagnosis
AFFECTED VEHICLE RANGE:
XJ Range
VIN:
G00001 onwards
Model Year:
2004 onwards
CONDITION SUMMARY:
DIAGNOSTIC GUIDANCE FOR WHEEL SPEED SENSOR FAULTS
Situation:
This bulletin has been issued to provide diagnostic guidance for wheel speed sensor faults.
Action:
Should a wheel speed sensor fault arise, refer to the Repair Procedure detailed in this bulletin to resolve the concern.
PARTS:
No parts provided for this bulletin. Diagnostic information only.
WARRANTY:
No warranty necessary for this bulletin. Diagnostic information only. Normal warranty policy and procedures apply.
REPAIR PROCEDURE
CLASSIFICATION OF WHEEL SPEED SENSOR FAULTS
NOTE:
Wheel speed sensor faults are classified as either "electrical faults" or "signal faults" and will indicate a potential problem as follows:
^
Electrical faults indicate a problem with the wheel speed sensor electrical circuit. The problem may be with the sensor, the control module or the
wiring between the speed sensor and the control module. Warranty analysis indicates that the wiring is the most likely source of wheel speed
sensor electrical faults.
^
Signal faults indicate that there is no detectable fault with the wheel speed sensor circuit but there is an abnormality with the signal from the
sensor. The abnormality may be in the form of an implausible change in signal level, as a step or a spike, or it may be that it is at an implausible
level compared to other wheel speed signals, for example, one signal may remain at zero while the others show a normal road speed.
NOTE:
After fixing some wheel speed sensor faults, it will be necessary to drive the vehicle above a speed of 10 mph (16 kph) in order to extinguish the
ABS warning lamp.
NOTE:
A Midtronics battery charger PSC550 must be connected to the vehicle battery during diagnostic sessions.
1.
Connect the diagnostic equipment to the vehicle and begin a WDS or IDS session.