SERVICE BRAKES, HYDRAULIC:ANTILOCK/TRACTION CONTROL/ELECTRONIC LIMITED SLIP
Defect
SOME OF THE ABS EQUIPPED VEHICLES WERE BUILT WITH AN UNDERSIZED BRAKE RETURN CHECK VALVE. IN INCIDENTS WHERE HARD BRAKE PEDAL EFFORT IS APPLIED ON LOW FRICTION ROAD SURFACES, LIKE RAIN COVERED STREETS, THE VALVES MAY FAIL, CAUSING THE ABS TO BECOME INOPERATIVE. THIS CREATES EXCESS BRAKE PEDAL TRAVEL AND MAY CAUSE THE ABS WARNING LIGHT TO COME ON.
Consequence
LACK OF FRONT WHEEL ABS COULD CAUSE THE FRONT WHEELBRAKES TO LOCK, INCREASING STOPPING DISTANCE WHICH MAY RESULT IN AN ACCIDENT.
Remedy
REPLACE THE RETURN CHECK VALVE WITH THE CORRECT VALVE.
Notes
SYSTEM: BRAKES; ANTI-LOCK BRAKES (ABS).VEHICLE DESCRIPTION: PICK-UP TRUCKS WITH OPTIONAL 4-WHEEL ABS SYSTEMS.