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STEP 4: Blink Codes for Knorr-Bremse KB-92 System ECU

  1. Use the table to identify ABS faults from the ECU Blink Codes recorded in STEP 3: Blink code identification and system response
  2. Links to solutions for common ABS faults can also be found below
  3. Please ensure all necessary Health and Safety precautions are implemented and adhered to before commencing any repair work
  4. A list of useful ABS Diagnostic Tools is available on this website
  5. If you require further help or information, please contact us

Knorr-Bremse KB-92 System ECU

Blink Code

Location

Type of Fault

1

No errors stored

10

Wheel speed sensor: Front axle, left

Short circuit or interruption

11

Wheel speed sensor: Front axle, left

Sensor gap too large / exciter ring damaged

12

Wheel speed sensor: Front axle, right

Short circuit or interruption

13

Wheel speed sensor: Front axle, right

Sensor gap too large / exciter ring damaged

14

Wheel speed sensor: Rear axle, left

Short circuit or interruption

15

Wheel speed sensor: Rear axle, left

Sensor gap too large / exciter ring damaged

16

Wheel speed sensor: Rear axle, right

Short circuit or interruption

17

Wheel speed sensor: Rear axle, right

Sensor gap too large / exciter ring damaged

22

Modulator: Front axle, left

Ground short circuit / interruption / voltage

23

Modulator: Front axle, right

Ground short circuit / interruption / voltage

24

Modulator: Rear axle, left

Ground short circuit / interruption / voltage

25

Modulator: Rear axle, right

Ground short circuit / interruption / voltage

28

ASR solenoid valve: Rear axle, left

Ground short circuit / interruption / voltage

29

ASR solenoid valve: Rear axle, right

Ground short circuit / interruption / voltage

30

Engine control / proportional valve

Ground short circuit / interruption / voltage

31

ASR control valve

Interruption / short circuit / signal error / no signal from ECU

32

Solenoid voltage: Front axle, right, and rear axle, left

Relay solenoid faulty: cannot turn off power

33

Solenoid voltage: Front axle, right, and rear axle, left

Relay solenoid faulty: cannot turn off power

34

Solenoid voltage: Front axle, left, and rear axle, right

Relay solenoid faulty: cannot turn off power

35

Solenoid voltage: Front axle, left, and rear axle, right

Relay solenoid faulty: cannot turn off power

36

ABS relay

Short circuit / interruption

52

ABS /ASR solenoid valve

Response time

53

ECU

ECU configured for ABS, but recognises ABS / ASR - reconfigure ECU

54

Exciter ring / tyre

Circumference difference too great

55

Tacho signal

Short circuit / interruption

56

Solenoid voltage: Front axle, right, and rear axle, left

Relay solenoid faulty: over voltage

57

Solenoid voltage: Front axle, left, and rear axle, right

Relay solenoid faulty: over voltage

91

Wheel speed signal > 1500Hz

Wheel speed sensor mounting / exciter ring

92

ABS / ASR solenoid valve

Response time

98

ECU

Internal error

99

ECU

Internal error

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