MERITOR WABCO ABS SOFTWARE MANUAL
USING MERITOR WABCO PC DIAGNOSTICS Follow the instructions in the Meritor WABCO PC Diagnostics manual for troubleshooting the ABS/ATC system. If a fault has been corrected since the ABS warning light originally came on, the system must be calibrated by driving the vehicle a short distance at mph (6 km/h) or more before the light will go out.
If either light does not come on during the self-test, check the bulb, all related circuit breakers in the electrical panel, or the batteries (the ABS/ATC system requires at least 9.5 volts to function correctly). If the light does not stay on, a stored or intermittent fault (indicating a loose connector or broken wire) has been recorded in the ABS electronic control unit (ECU) memory. If the light stays on after the 3-ond self-test, there is an active system fault that must be repaired to ensure proper system operation. Then, turn on the ignition switch, but don t start the engine.
MERITOR WABCO ABS SOFTWARE CODE
To check the type of fault code recorded, stop the vehicle and turn off the engine. These are normal conditions and do not indicate a fault. NOTE: The TRAC indicator stays lit when the ATC is controlling wheel spin and blinks continuously if the ATC switch (TRAC MUD/SNOW) is activated.
MERITOR WABCO ABS SOFTWARE DRIVER
The driver can continue to drive the vehicle, but the ABS system could be partially or completely inoperative. If any of the lights stay on, or come back on later, a problem within the ABS/ATC system has occurred. After about 3 onds, these lights should go out if all of the vehicle s ABS/ATC components are working.
Under normal conditions, the ABS warning light(s) (ABS, TRAILER ABS, or ANTI LOCK) and ATC wheel spin indicator light (TRAC) light up on the instrument cluster when the ignition is turned on. The first step is an automatic self-test. The ABS (and ATC, if equipped) system has built-in diagnostics to ensure that all components are operating correctly. The J1587-code method provides more information about the specific problem than can be obtained from the blink codes. Troubleshoot using the instrument panel blink codes (with or without Pro-Link 9000 ). Troubleshoot using J1587 codes viewed on a computer with Freightliner s ServiceLink installed. If any of these lights come on after the initial self-test, use one of the following methods to identify the problem: Troubleshoot using the Meritor WABCO PC Diagnostics software. This subject includes troubleshooting procedures for diagnosing problems indicated by the ABS warning light(s) or the ATC wheel spin indicator light (if equipped) on the instrument panel. Activation of the vehicle ATC on a dynamometer will cause unequal drive-wheel torque that can result in loss of vehicle control and personal injury or death. 1 (ABS) 2.22 Troubleshooting WARNING Before testing a vehicle equipped with Automatic Traction Control (ATC) on a dynamometer, the ATC system must be disabled.
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