Excessive Dump Time

Symptom:
EXCESSIVE DUMP TIME

When Monitored and Set Condition:
EXCESSIVE DUMP TIME

When Monitored: Brake pedal depressed (to enable antilock activity). Wheel speed below 6 km/in (4 mph). Four wheel drive sense signal input indicates vehicle is not in four wheel drive. Wheel speed history ruling out any unusual events during the preceding 15 seconds.

Set Condition: The need for more that 24 dump pulses in response to the wheel (or wheels) that have gone to lock without recovering.

POSSIBLE CAUSES
BRAKE SYSTEM MECHANICAL CONCERN
TONE WHEEL CONCERN
WIRING HARNESS CONCERN
CAB INTERNAL CONCERN
4WD SWITCH SENSE CIRCUIT