Anti-Lock Braking Systems (ABS) for Trucks ... - Meritor WABCO
Anti-Lock Braking Systems (ABS) for Trucks ... - Meritor WABCO
Anti-Lock Braking Systems (ABS) for Trucks ... - Meritor WABCO
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Section 3TroubleshootingSensorsFigure 3.17Retarder DatalinkFigure 3.20Rotate wheel: Monitors the inputs to the ECU from the wheelsensors, one at a time.Engine Datalink (ATC vehicles only)Checks wiring connections.<strong>ABS</strong>/ATC SwitchesFigure 3.21Figure 3.18Checks status of <strong>ABS</strong> and ATC/Deep Snow-Mudswitches on the instrument panel.Reduces engine torque to verify proper wiring.Retarder RelayFigure 3.19 Verifies relay is functioning properly (a clickshould be heard). Checks wiring connections.Testing ComponentsIf the blink codes or MPSI Pro-Link ® indicate aproblem with an <strong>ABS</strong> or <strong>ABS</strong>/ATC component,always check the wiring or connections be<strong>for</strong>ereplacing the component. In your preliminarycheck look <strong>for</strong>: Loose connections Corrosion BreakageSee “<strong>Meritor</strong> <strong>WABCO</strong> Test Adaptor” in this section<strong>for</strong> in<strong>for</strong>mation. The adaptor makes checkingresistance across the harness pins easier.CAUTIONWhen troubleshooting and testing the <strong>ABS</strong>system at the main ECU connector, be carefulnot to damage the electrical sockets on theECU connector.Page 24
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