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:
  R27 Filter Heating
• Ignition ON
• Measure voltage between the following terminals:
  R27 Filter Heating
  Wiring harness connector (wiring harness side) terminal 1
  &
  Ground

4.8 ... 5.2 V

Check: Short to Voltage/Interruption of Ground Circuit

• Measure voltage between:
  R27 Filter Heating
  Wiring harness connector (wiring harness side) terminal 2
  &
  R27 Filter Heating
  Wiring harness connector (wiring harness side) terminal 1

4.8 ... 5.2 V

Result

Cause Of Fault

• Defective component:
  R27 Filter Heating
  or
  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.

Note:

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

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

• Short circuit to voltage/interruption of circuit between:
  A84 Control Unit - Engine
  Wiring harness connector (wiring harness side) terminal 13 (XC20)
  &
  R27 Filter Heating
  Wiring harness connector (wiring harness side) terminal 2

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 to voltage/ground/interruption of circuit between:
  A84 Control Unit - Engine
  Wiring harness connector (wiring harness side) terminal 61 (XC20)
  &
  R27 Filter Heating
  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.