Symptom:
INCORRECT TONE WHEEL FAILURE
When Monitored and Set Condition:
INCORRECT TONE WHEEL FAILURE
When Monitored: Ignition ON. Vehicle speed above 40 km/h (25 mph) for 2 minutes.
Set Condition: When the CAB detects an unexpected wheel speed condition caused by a
tire size that does not meet vehicle specification.
POSSIBLE CAUSES
INCORRECT TIRES ON VEHICLE
INCORRECT TONE WHEEL ON VEHICLE
TEST ACTION APPLICABILITY
1 Inspect the tire sizes on the vehicle.
Is a smaller than production tire, mini spare, or two mini spares installed on both
front wheels?
All
Yes → Replace the incorrect tire(s) size with production size tire(s).
Perform ABS VERIFICATION TEST - VER 1.
No → Go To 2
2 Count the number of tone wheel teeth on both of the front driveshafts.
Does one or both tone wheel(s) have (56 or 40) teeth?
All
Yes → Replace the front driveshaft(s) with the incorrect number of tone
wheel teeth.
Perform ABS VERIFICATION TEST - VER 1.
No → Test Complete.
16
BRAKES (CAB)
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