Abbreviations

	OBD - Onboard diagnostics
	Bosch (Knorr) ABS/ASR EU 12 6S/6K
	Meaning of the fault codes
	FC Meaning     1 – 1 No error RPM sensor front left:   2 – 1 Air gap   2 – 2 Start-up monitoring   2 – 3 Pulse ring fault   2 – 4 Implausibly long ABS control loop   2 – 5 No sensor signal   2 – 6 Short circuit after terminal 30, 31 (earth) or cable broken   2 – 7 Internal fault   2 – 8 Sensor configuration fault RPM sensor front right:   3 – 1 Air gap   3 – 2 Start-up monitoring   3 – 3 Pulse ring fault   3 – 4 Implausibly long ABS control loop   3 – 5 No sensor signal   3 – 6 Short circuit after terminal 30, 31 (earth) or cable broken   3 – 7 Internal fault   3 – 8 Sensor configuration fault RPM sensor drive axle left:   4 – 1 Air gap   4 – 2 Start-up monitoring   4 – 3 Pulse ring fault   4 – 4 Implausibly long ABS control loop   4 – 5 No sensor signal   4 – 6 Short circuit after terminal 30, 31 (earth) or cable broken   4 – 7 Internal fault   4 – 8 Sensor configuration fault RPM sensor drive axle right:   5 – 1 Air gap   5 – 2 Start-up monitoring   5 – 3 Pulse ring fault   5 – 4 Implausibly long ABS control loop   5 – 5 No sensor signal   5 – 6 Short circuit after terminal 30, 31 (earth) or cable broken   5 – 7 Internal fault   5 – 8 Sensor configuration fault RPM sensor third axle left:   6 – 1 Air gap   6 – 2 Start-up monitoring   6 – 3 Pulse ring fault   6 – 4 Implausibly long ABS control loop   6 – 5 No sensor signal   6 – 6 Short circuit after terminal 30, 31 (earth) or cable broken   6 – 7 Internal fault   6 – 8 Sensor configuration fault RPM sensor third axle right:   7 – 1 Air gap   7 – 2 Start-up monitoring   7 – 3 Pulse ring fault   7 – 4 Implausibly long ABS control loop   7 – 5 No sensor signal   7 – 6 Short circuit after terminal 30, 31 (earth) or cable broken   7 – 7 Internal fault   7 – 8 Sensor configuration fault ABS pressure control valve front left:   8 – 1 Short circuit AV after terminal 30   8 – 2 Short circuit AV after terminal 31   8 – 3 AV supply open circuit   8 – 4 Earth supply, open circuit   8 – 5 Short circuit EV after terminal 30   8 – 6 Short circuit EV after terminal 31   8 – 7 EV supply open circuit   8 – 8 Valve configuration fault ABS pressure control valve front right:   9 – 1 Short circuit AV after terminal 30   9 – 2 Short circuit AV after terminal 31   9 – 3 AV supply open circuit   9 – 4 Earth supply, open circuit   9 – 5 Short circuit EV after terminal 30   9 – 6 Short circuit EV after terminal 31   9 – 7 EV supply open circuit   9 – 8 Valve configuration fault ABS pressure control valve drive axle left:   10 – 1 Short circuit AV after terminal 30   10 – 2 Short circuit AV after terminal 31   10 – 3 AV supply open circuit   10 – 4 Earth supply, open circuit   10 – 5 Short circuit EV after terminal 30   10 – 6 Short circuit EV after terminal 31   10 – 7 EV supply open circuit   10 – 8 Valve configuration fault ABS pressure control valve drive axle right:   11 – 1 Short circuit AV after terminal 30   11 – 2 Short circuit AV after terminal 31   11 – 3 AV supply open circuit   11 – 4 Earth supply, open circuit   11 – 5 Short circuit EV after terminal 30   11 – 6 Short circuit EV after terminal 31   11 – 7 EV supply open circuit   11 – 8 Valve configuration fault ABS pressure control valve 3rd axle left:   12 – 1 Short circuit AV after terminal 30   12 – 2 Short circuit AV after terminal 31   12 – 3 AV supply open circuit   12 – 4 Earth supply, open circuit   12 – 5 Short circuit EV after terminal 30   12 – 6 Short circuit EV after terminal 31   12 – 7 EV supply open circuit   12 – 8 Valve configuration fault ABS pressure control valve 3rd axle right:   13 – 1 Short circuit AV after terminal 30   13 – 2 Short circuit AV after terminal 31   13 – 3 AV supply open circuit   13 – 4 Earth supply, open circuit   13 – 5 Short circuit EV after terminal 30   13 – 6 Short circuit EV after terminal 31   13 – 7 EV supply open circuit   13 – 8 Valve configuration fault ABS pressure control valve earth switch:   10 – 10 Short circuit earth cable on Diagonal 1 after terminal 30   10 – 11 Short circuit earth cable on Diagonal 1 after terminal 31   11 – 10 Short circuit earth cable on Diagonal 2 after terminal 30   11 – 11 Short circuit earth cable on Diagonal 2 after terminal 31 ASR valve:   14 – 1 –   14 – 2 –   14 – 3 –   14 – 4 –   14 – 5 Short circuit after terminal 30   14 – 6 Short circuit after terminal 31   14 – 7 Open circuit   14 – 8 Valve configuration fault Engine interface:   14 – 9 CAN-J1939 PWM   – DKR short circuit after terminal 30 or 31   14 – 10 CAN-J1939 PWM   – EDC feedback fault   14 – 11 CAN-J1939 PWM   – DKV short circuit after terminal 30 or 31 or open circuit   14 – 12 CAN-J1939 PWM   timeout EEC1 DKV time fault (pulse width modulation) (only on vehicles and engines without CAN) Control unit - internal faults:   15 – 1...11 Internal fault in control unit Power supply:   16 – 1 PMV1 voltage too high   16 – 2 PMV1 voltage too low   16 – 3 PMV1 open circuit   16 – 4 GND_PMV1 open circuit or voltage differential to U_ECU to high   16 – 5 PMV2 voltage too high   16 – 6 PMV2 voltage too low   16 – 7 PMV2 open circuit   16 – 8 GND_PMV2 open circuit or voltage differential to U_ECU to high   16 – 9 Voltage terminal 15 too high   16 – 10 Voltage terminal 15 too low   16 – 11 Voltage differential U_PMV1 to U_PMV2 too high Retarder interface:   17 – 1 Short circuit retarder relay after terminal 30 or open circuit   17 – 2 Short circuit retarder relay after terminal 31   17 – 3 CAN bus off (128 times no send confirmation)   17 – 4 CAN timeout ERC1 (> 300 ms) Tires:   17 – 5 Incorrect tires   17 – 6 C3 balance faulty Other faults:   17 – 7 Brake light switch still not operated   17 – 8 ASR off road function or roller dynamometer mode activated   17 – 9 ABS off road function activated   17 – 10 –   17 – 11 –   17 – 12 Sensor memory bit set
	Explanation of the diagonal partitioning D1 Diagonal 1 (1L/2R/3R) D2 Diagonal 2 (1R/2L/3L) L left wheel R right wheel 1 Axle 1 (front axle) 2 Axle 2 3 Axle 3 4 Direction of motion