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STEP 4: Blink Codes for Wabco Vario C2 version 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

Wabco Vario C2 version ECU

System Code

Fault Code

Location

Cause

1

2

3

0

0

System

No Faults - System O.K.

1

1

System

Parameterize system (re-initialise flash code)

1

2

Sensor B (L1)

Sensor speed jump

1

3

Sensor B (L1)

Air gap

1

4

Sensor B (L1)

Interruption of wire, short circuit

1

5

Sensor D (H1)

Sensor speed jump

1

6

Sensor D (H1)

Air gap

1

7

Sensor D (H1)

Interruption of wire, short circuit

1

8

Sensor A (L2)

Sensor speed jump

1

9

Sensor A (L2)

Air gap

1

10

Sensor A (L2)

Interruption of wire, short circuit

1

11

Sensor C (H2)

Sensor speed jump

1

12

Sensor C (H2)

Air gap

1

13

Sensor C (H2)

Interruption of wire, short circuit

1

14

Sensor F (Z1)

Sensor speed jump

1

15

Sensor F (Z1)

Air gap

2

0

Sensor F (Z1)

Interruption of wire, short circuit

2

1

Sensor E (Z2)

Sensor speed jump

2

2

Sensor E (Z2)

Air gap

2

3

Sensor E (Z2)

Interruption of wire, short circuit

2

4

Modulator A (L) IV

Break in wiring

2

5

Modulator A (L) OV

Break in wiring

2

6

Modulator B (H1) IV

Break in wiring

2

7

Modulator B (H1) OV

Break in wiring

2

8

Modulator C (H2) IV

Break in wiring

2

9

Modulator C (H2) OV

Break in wiring

3

10

Modulator A (L) IV

Short to earth / ground

2

11

Modulator A (L) OV

Short to earth / ground

2

12

Modulator B (H1) IV

Short to earth / ground

2

13

Modulator B (H1) OV

Short to earth / ground

2

14

Modulator C (H2) IV

Short to earth / ground

2

15

Modulator C (H2) OV

Short to earth / ground

3

2

Contact 3 (supply plug)

Earth missing

3

3

Undervoltage

3

4

Break in wiring contact 7

Retarder (ECU 446 105 051 0 only)

3

5

Short circuit contact 7

Retarder (ECU 446 105 051 0 only)

3

6

Modulator A (L) [red], or ECU

Earth break

3

7

Modulator A (L) [red], or ECU

Earth break

3

8

Modulator B (H1) [yellow], or ECU

Earth break

3

9

Modulator B (H1) [yellow], or ECU

Earth break

3

10

Modulator C (H2) [blue], or ECU

Earth break

3

11

Modulator C (H2) [blue], or ECU

Earth break

3

12

Overvoltage

3

13

Permanent positive at contact 7

Retarder (ECU 446 105 051 0 only)

4

6

Modulator A (L) [red], or ECU

Short circuit to positive

4

7

Modulator A (L) [red], or ECU

Short circuit to positive

4

8

Modulator B (H1) [yellow], or ECU

Short circuit to positive

4

9

Modulator B (H1) [yellow], or ECU

Short circuit to positive

4

10

Modulator C (H2) [blue], or ECU

Short circuit to positive

4

11

Modulator C (H2) [blue], or ECU

Short circuit to positive

4

12

No operative modulator connected

4

13

No operative sensor connected

4

14

Short circuit to positive contact 7

Retarder (ECU 446 105 051 0 only)

*)

With this fault, the system configuration flashed out is meaningless. Before changing the ECU, check the earth lead (yellow / green) of each valve against outlet (OV) and inlet valves (IV) again

System Configuration

Code 1st position

6S / 3M

1 identical with C1

4S / 3M

2 identical with C1

4S / 2M

3 identical with C1

2S / 2M

4 identical with C1

2S / 1M on red, or yellow, or blue

5 identical with C1

6S / 3M with retarder control

6 additional to C plus

4S / 3M with retarder control

7 additional to C plus

4S / 2M with retarder control

8 additional to C plus

2S / 2M with retarder control

9 additional to C plus

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