VEHICLE DESCRIPTION: STREET SWEEPERS EQUIPPED WITH MERITOR WABCO PHASE 1, D-VERSION ANTILOCK BRAKE SYSTEM (ABS), FAIL TO COMPLY TO THE REQUIREMENTS OF FMVSS NO. 105, "HYDRAULIC AND ELECTRIC BRAKE SYSTEMS." AN INTERNAL DIAGNOSTIC SYSTEM IN THE ABS MAY NOT DETECT AN EXTREME WHEEL SPEED SENSOR AIR GAP. SUCH A CONDITION COULD POSSIBLY OCCUR DURING (1) ORIGINAL ASSEMBLY OR (2) SUBSEQUENT WHEEL END SERVICE.
RiskFAILURE OF THE ELECTRONIC CONTROL UNIT TO DETECT AN EXTREME WHEEL SPEED SENSOR AIR GAP CAN RESULT IN THE LOSS OF ANTILOCK BRAKING FUNCTION ON THE WHEEL(S) WHERE THE AIR GAP EXISTS, INCREASING THE RISK OF A CRASH.
FixTHE ABS ECU WILL BE REMOVED AND REPLACED OR THE ECU WILL BE REPROGRAMMED.