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Haldex ABS fault codes



This is a list of ECU fault codes (also known as error codes or DTCs - diagnostic trouble codes) used by Haldex ABS ECUs on truck trailers, for example the Haldex Modal and Haldex Modular ECUs typically used on commercial vehicles in Europe. These are typically obtained by use of diagnostic code reader tools namely the Haldex DDU, the Haldex WinEOLT End-Of-Line test PC software and the Haldex Info Centre (all no longer in production), or the Code-Talk device produced by Doctor Air Brake.


00System OK, vehicle moving
011A sensor/wiring open circuit or short circuit
021B sensor/wiring open circuit or short circuit
032A sensor/wiring open circuit or short circuit
042B sensor/wiring open circuit or short circuit
053A sensor/wiring open circuit or short circuit
063B sensor/wiring open circuit or short circuit
07System OK, vehicle not moving
08Retarder relay/wiring open circuit
09Retarder relay/wiring short circuit
0ACOLAS solenoid/wiring open circuit
0CCOLAS solenoid/wiring short circuit
0EWarning lamp circuit fault
111A sensor system low output
121B sensor system low output
132A sensor system low output
142B sensor system low output
153A sensor system low output
163B sensor system low output
20Exciter type incorrect
211A sensor system intermittent low output
221B sensor system intermittent low output
232A sensor system intermittent low output
242B sensor system intermittent low output
253A sensor system intermittent low output
263B sensor system intermittent low output
37Lamp signalled by external device
40Sensor wiring crossed across an axle
41Slow recovery of one wheel of red channel
42Slow recovery of one wheel of blue channel
43Slow recovery of one wheel of yellow channel
61Hold solenoid open circuit red
62Hold solenoid open circuit blue
63Hold solenoid open circuit yellow
67Dump solenoid open circuit red
68Dump solenoid open circuit blue
69Dump solenoid open circuit yellow
71Hold solenoid short circuit red
72Hold solenoid short circuit blue
73Hold solenoid short circuit yellow
77Dump solenoid short circuit red
78Dump solenoid short circuit blue
79Dump solenoid short circuit yellow
80Modulator poor insulation or wiring fault
81Hold solenoid B+ short circuit red
82Hold solenoid B+ short circuit blue
83Hold solenoid B+ short circuit yellow
87Dump solenoid B+ short circuit red
88Dump solenoid B+ short circuit blue
89Dump solenoid B+ short circuit yellow
90Supply voltage low, < 18 volts
91ISO 7638 pin 1 power supply bad, or fuse blown
92Supply voltage high, > 32 volts
93Internal ECU fault 93
99Internal ECU fault 99
A1Reset to ride height
A2Retarder
CFSensors and solenoid not connected

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