TEST ACTION APPLICABILITY
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 OK?
All
Yes → Go To 5
No → Replace the Tone Wheel in accordance with the Service Informa-
tion.
Perform ABS VERIFICATION TEST - VER 1.
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 OK?
All
Yes → Go To 6
No → Repair as necessary.
Perform ABS VERIFICATION TEST - VER 1.
6 Turn the ignition off.
Inspect the wheel bearings for excessive runout or clearance.
NOTE: Refer to the appropriate service information, if necessary, for
procedures or specifications.
Is the bearing clearance OK ?
All
Yes → Go To 7
No → Repair as necessary.
Perform ABS VERIFICATION TEST - VER 1.
7 Turn the ignition off.
Visually inspect brakes for locking up due to lining contamination or overheating.
Inspect all components for defects which may cause a Signal DTC to set.
Is any component damaged?
All
Yes → Repair as necessary.
Perform ABS VERIFICATION TEST - VER 1.
No → Refer to symptom SENSOR CIRCUIT FAILURE for further
diagnostics.
Perform ABS VERIFICATION TEST - VER 1.
23
BRAKES (CAB)
LEFT FRONT WHEEL SPEED SIGNAL FAILURE — Continued