All Rights Reserved.Example: bachelor of science Search Trailer ABS Wall Chart - WABCO © Copyright Drakefield Limited 2007-2008. If code does not clear, it may be necessary to replace the ECUĬheck all ABS valve ground connections for diagonals 1 and 2 (open, shorted to ground or shorted to battery). Verify accuracy of blink code and clear from ECU memoryĬheck vehicle voltage, fuse, and supply to ECU (9.5-14 volts)Ĭheck vehicle voltage (9.5-14 volts for a 12-volt system, 18-30 volts for a 24-volt system)
Verify blink code switch was activated longer than 16 seconds
Verify 7 to 14 ohms resistance for a 12-volt system, 28-49 ohms resistance for a 24-volt system Repair or replace as neededĬheck for proper data link connection (J1922 and J1939)Ĭheck ATC Valve, valve cables, and connectors Verify minimum 0.2 volts AC output 30 RPMĬheck sensor, sensor cable, and connectorsĬheck for tyre size mismatch or tooth wheel differenceĬheck sensor, sensor cable, and connector for intermittent contactĬheck for damaged tooth wheel. Refer to service information provided by manufacturerĬheck for loose wheel bearings or excessive hub runout If you require further help or information, please contact usĬheck ABS modulator valve, valve cable, and connectorsġ2-volt system: Verify 4.0-9.0 ohms resistance (ABS modulator valve)Ģ4-volt system: Verify 11.0-21.0 ohms resistance (ABS modulator valve).A list of useful ABS Diagnostic Tools is available on this website.Please ensure all necessary Health and Safety precautions are implemented and adhered to before commencing any repair work.Links to solutions for common ABS faults can also be found below.Use the table to identify ABS faults from the ECU Blink Codes recorded in STEP 3: Blink code identification and system response.STEP 4: Blink Codes for Wabco D version ECU ABS Troubleshooting for Trucks, Trailers, and Buses
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