Jeep KJ Liberty 2005, Service Manual

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TEST ACTION APPLICABILITY
1 Turn the ignition on.
With the DRBIII
t
, read DTCs.
With the DRBIII
t
, read and record Freeze Frame information.
NOTE: The ABM must sense ALL 4 wheels at 25 km/h (15 mph) before it will
extinguish the ABS indicators.
Does the DRBIII
t
display WHEEL SPEED SENSOR SIGNAL and WHEEL SPEED
SENSOR CIRCUIT?
All
Yes
→
Refer to the affected WHEEL SPEED SENSOR CIRCUIT for the
related symptom(s).
Perform ABS VERIFICATION TEST - VER 1.
No
→
Go To 2
2 Turn the ignition on.
With the DRBIII
t
in Sensors, monitor ALL the Wheel Speed Sensor Signals while an
assistant drives the vehicle.
Slowly accelerate as straight as possible from a stop to 24 km/h (15 mph).
Is the affected Wheel Speed Signal showing 0 km/h (0 mph)?
All
Yes
→
Go To 3
No
→
The condition is not present at this time. Monitor DRBIII
t
parameters while wiggling the related wiring harness. Refer to
any Technical Service Bulletins(TSB) that may apply. Visually
inspect the related wiring harness and connector terminals.
Perform ABS VERIFICATION TEST - VER 1.
3 Turn the ignition off.
Inspect the ABM connector, affected Wheel Speed Sensor, and affected Wheel Speed
Sensor connector.
Is the Wheel Speed Sensor or any connector damaged? All
Yes
→
Repair as necessary.
Perform ABS VERIFICATION TEST - VER 1.
No
→
Go To 4
4 Turn ignition off.
Inspect the affected Tone Wheel for damaged, missing teeth, cracks, or looseness.
NOTE: The Tone Wheel teeth should be perfectly square, not bent, or nicked.
Is the affected Tone Wheel damaged? All
Yes
→
Replace the Tone Wheel in accordance with the Service Informa-
tion.
Perform ABS VERIFICATION TEST - VER 1.
No
→
Go To 5
5 Turn the ignition off.
Using a Feeler Gauge, measure the affected Wheel Speed Sensor Air Gap.
NOTE: Refer to the appropriate service information, if necessary, for
procedures or specifications.
Is the Air Gap within specifications? All
Yes
→
Go To 6
No
→
Repair as necessary.
Perform ABS VERIFICATION TEST - VER 1.
23
BRAKES (25E)
LEFT FRONT WHEEL SPEED SENSOR SIGNAL —
Continued