Vauxhall Workshop Service and Repair Manuals

Test

Work Order Description

Nominal Value

Check: Short to Voltage/Ground/Interruption of Signal Circuit

• Ignition OFF
• Disconnect wiring harness connector from:
  B51 Sensor - Brake Lining, Front, Left
• Ignition ON
• Measure voltage between the following terminals:
  B51 Sensor - Brake Lining, Front, Left
  Wiring harness connector (wiring harness side) terminal 2
  &
  Ground

7 ... 8 V

Check: Short to Voltage of Signal Circuit

• Ignition OFF
• Connect fused jumper wire to:
  B51 Sensor - Brake Lining, Front, Left
  Wiring harness connector (wiring harness side) terminal 2
  &
  Ground
• Ignition ON

Data List

• Select the following Functional System on the diagnostic tester:
  Instrument
• Check the following data list parameters:
  Brake Pad Sensor Left Front

Note:

This data list parameter is in the data list 4 .

Inactive

Check: Circuit Interruption of Ground Circuit

• Ignition OFF
• Measure resistance between the following terminals:
  B51 Sensor - Brake Lining, Front, Left
  Wiring harness connector (wiring harness side) terminal 3
  &
  Ground

less than 5 Ohm

Check: Component

Data List

• Select the following Functional System on the diagnostic tester:
  Instrument
• Check the following data list parameters:
  Brake Pad Sensor Left Front

Note:

This data list parameter is in the data list 4 .

Active

Check: Short to Ground/Interruption of Signal Circuit

• Ignition OFF
• Disconnect wiring harness connector from:
  X125 Underhood Electronic Module
• Measure resistance between the following terminals:
  X125 Underhood Electronic Module
  Wiring harness connector (wiring harness side) terminal 27 (XE2)
  &
  B51 Sensor - Brake Lining, Front, Left
  Wiring harness connector (wiring harness side) terminal 2

less than 5 Ohm

Result

Cause Of Fault

• Defective component:
  B51 Sensor - Brake Lining, Front, Left

• Circuit interruption between:
  B51 Sensor - Brake Lining, Front, Left
  Wiring harness connector (wiring harness side) terminal 3
  &
  Ground

• Short circuit to voltage between:
  X125 Underhood Electronic Module
  Wiring harness connector (wiring harness side) terminal 27 (XE2)
  &
  B51 Sensor - Brake Lining, Front, Left
  Wiring harness connector (wiring harness side) terminal 4

• Defective component:
  X125 Underhood Electronic Module

Note:

Reset the concerned control unit with the diagnostic tester before replacing it. In order to do that, call up the "RESET" function from the PROGRAMMING menu of the current system on the diagnostic tester.

• Circuit interruption between:
  X125 Underhood Electronic Module
  Wiring harness connector (wiring harness side) terminal 27 (XE2)
  &
  B51 Sensor - Brake Lining, Front, Left
  Wiring harness connector (wiring harness side) terminal 4

• Short circuit to ground between:
  X125 Underhood Electronic Module
  Wiring harness connector (wiring harness side) terminal 27 (XE2)
  &
  B51 Sensor - Brake Lining, Front, Left
  Wiring harness connector (wiring harness side) terminal 4

or

• Defective component:
  X125 Underhood Electronic Module

Important:

Reset the concerned control unit with the diagnostic tester before replacing it. In order to do that, call up the "RESET" function from the PROGRAMMING menu of the current system on the diagnostic tester.