Vauxhall Workshop Service and Repair Manuals

Test

Work Order Description

Nominal Value

Check: Interruption of Voltage Supply Circuit

• Ignition OFF
• Disconnect wiring harness connector from:
  B30 Impulse Sensor - Crankshaft
• Ignition ON
• Measure voltage between the following terminals:
• B30 Impulse Sensor - Crankshaft
  Wiring harness connector (wiring harness side) terminal 3
  &
  Ground

4.8 ... 5.2 V

Check: Short to Voltage/Interruption of Ground Circuit

• Measure voltage between the following terminals:
  B30 Impulse Sensor - Crankshaft
  Wiring harness connector (wiring harness side) terminal 3
  &
  B30 Impulse Sensor - Crankshaft
  Wiring harness connector (wiring harness side) terminal 2

4.8 ... 5.2 V

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

• Measure voltage between the following terminals:
  B30 Impulse Sensor - Crankshaft
  Wiring harness connector (wiring harness side) terminal 1
  &
  Ground

4.8 ... 5.2 V

Check: Mechanical Functionality

• Check the following system for proper operation:
  B30 Impulse Sensor - Crankshaft
  (intermittent problems, missing teeth, wrong reference point, incorrect gap position, etc.)

Test okay?

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

• Measure voltage between the following terminals:
  B30 Impulse Sensor - Crankshaft
  Wiring harness connector (wiring harness side) terminal 1
  &
  Ground

greater than 5.2 V

Check: Interruption of Signal Circuit

• Ignition OFF
• Disconnect wiring harness connector from:
  A84 Control Unit - Engine
• Measure resistance between the following terminals:
  A84 Control Unit - Engine
  Wiring harness connector (wiring harness side) terminal 27 (XC99)
  &
  B30 Impulse Sensor - Crankshaft
  Wiring harness connector (wiring harness side) terminal 1

less than 5 Ohm

Check: Circuit Interruption of Ground Circuit

• Ignition OFF
• Disconnect wiring harness connector from:
  A84 Control Unit - Engine
• Measure resistance between the following terminals:
  A84 Control Unit - Engine
  Wiring harness connector (wiring harness side) terminal 21 (XC99)
  &
  B30 Impulse Sensor - Crankshaft
  Wiring harness connector (wiring harness side) terminal 2

less than 5 Ohm

Result

Cause Of Fault

• Defective component:
  B30 Impulse Sensor - Crankshaft
  or
  A84 Control Unit - Engine

Note:

The replacement of the components must be done in the listed order.

The system must be checked for proper operation after every replacement.

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.

• Repair the concerned circuit/component.

• Short circuit to voltage between:
  A84 Control Unit - Engine
  Wiring harness connector (wiring harness side) terminal 27 (XC99)
  &
  B30 Impulse Sensor - Crankshaft
  Wiring harness connector (wiring harness side) terminal 1

or

• Defective component:
  A84 Control Unit - Engine

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.

• Short circuit to ground between:
  A84 Control Unit - Engine
  Wiring harness connector (wiring harness side) terminal 27 (XC99)
  &
  B30 Impulse Sensor - Crankshaft
  Wiring harness connector (wiring harness side) terminal 1

or

• Defective component:
  A84 Control Unit - Engine

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.

• Circuit interruption between:
  A84 Control Unit - Engine
  Wiring harness connector (wiring harness side) terminal 27 (XC99)
  &
  B30 Impulse Sensor - Crankshaft
  Wiring harness connector (wiring harness side) terminal 1

• Short circuit to voltage between:
  B30 Impulse Sensor - Crankshaft
  Wiring harness connector (wiring harness side) terminal 2
  &
  A84 Control Unit - Engine
  Wiring harness connector (wiring harness side) terminal 21 (XC99)

or

• Defective component:
  A84 Control Unit - Engine

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.

• Circuit interruption between:
  A84 Control Unit - Engine
  Wiring harness connector (wiring harness side) terminal 21 (XC99)
  &
  B30 Impulse Sensor - Crankshaft
  Wiring harness connector (wiring harness side) terminal 2

• Circuit interruption between:
  A84 Control Unit - Engine
  Wiring harness connector (wiring harness side) terminal 3 (XC99)
  &
  B30 Impulse Sensor - Crankshaft
  Wiring harness connector (wiring harness side) terminal 3

or

• Defective component:
  A84 Control Unit - Engine

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.