Vauxhall Workshop Service and Repair Manuals

Test

Work Order Description

Nominal Value

Check: Short to Ground/Interruption of Voltage Supply Circuit

• Ignition OFF
• Disconnect wiring harness connector from:
  B69 Air Mass Meter
• Ignition ON
• Measure voltage between the following terminals:
  B69 Air Mass Meter
  Wiring harness connector (wiring harness side) terminal 2
  &
  Ground

greater than 11 V

Check: Short to Voltage/Interruption of Ground Circuit

• Measure voltage between the following terminals:
  B69 Air Mass Meter
  Wiring harness connector (wiring harness side) terminal 2
  &
  B69 Air Mass Meter
  Wiring harness connector (wiring harness side) terminal 3

greater than 11 V

Check: Short to Voltage/Ground/Interruption of Voltage Supply

• Measure voltage between the following terminals:
  B69 Air Mass Meter
  Wiring harness connector (wiring harness side) terminal 4
  &
  Ground

4.8 ... 5.2 V

Check: Short to Voltage of Signal Circuit

• Measure voltage between the following terminals:
  B69 Air Mass Meter
  Wiring harness connector (wiring harness side) terminal 5
  &
  Ground

less than 0.3 V

Check: Short to Ground of Signal Circuit

• Ignition OFF
• Remove electrical component from socket:
  K12_X125 Relay - Radiator Fan
• Disconnect wiring harness connector from:
  A84 Control Unit - Engine
  (Wiring Harness Connector XC7 )
• Measure resistance between the following terminals:
  B69 Air Mass Meter
  Wiring harness connector (wiring harness side) terminal 5
  &
  Ground

greater than 500 kOhm

Check: Interruption of Signal Circuit

• Measure resistance between the following terminals:
  B69 Air Mass Meter
  Wiring harness connector (wiring harness side) terminal 5
  &
  A84 Control Unit - Engine
  Wiring harness connector (wiring harness side) terminal 6 (XC7)

less than 5 Ohm

Check: Short to Voltage of Ground Circuit

• Measure voltage between the following terminals:
  B69 Air Mass Meter
  Wiring harness connector (wiring harness side) terminal 3
  &
  Ground

less than 0.3 V

Check: Short to Voltage/Interruption of Ground Circuit

• Ignition OFF
• Disconnect wiring harness connector from:
  A111 Throttle Valve - Positioner
• Ignition ON
• Measure voltage between the following terminals:
  B69 Air Mass Meter
  Wiring harness connector (wiring harness side) terminal 2
  &
  B69 Air Mass Meter
  Wiring harness connector (wiring harness side) terminal 3
• Disconnect each of the following components/control units consecutively from the wiring harness and repeat the measurement each time:
  B39 Sensor - Temperature, Coolant
  B26 Sensor - Atmospheric Pressure
  B150 Sensor - Boost Pressure

less than 0.3 V

Check: Short to Voltage of Ground Circuit

• Ignition OFF
• Disconnect wiring harness connector from:
  M3A Motor - Radiator Fan
  M3B Motor - Radiator Fan
  and
  A84 Control Unit - Engine
  (Wiring Harness Connector XC7 )
• Ignition ON
• Measure voltage between the following terminals:
  B69 Air Mass Meter
  Wiring harness connector (wiring harness side) terminal 3
  &
  Ground

less than 0.3 V

Result

Cause Of Fault

• Defective component:
  B69 Air Mass Meter

• Circuit interruption between:
  A84 Control Unit - Engine
  Wiring harness connector (wiring harness side) terminal 6 (XC7)
  &
  B69 Air Mass Meter
  Wiring harness connector (wiring harness side) terminal 5

• Short circuit to ground between:
  A84 Control Unit - Engine
  Wiring harness connector (wiring harness side) terminal 6 (XC7)
  &
  B69 Air Mass Meter
  Wiring harness connector (wiring harness side) terminal 5

• Short circuit to voltage between:
  A84 Control Unit - Engine
  Wiring harness connector (wiring harness side) terminal 6 (XC7)
  &
  B69 Air Mass Meter
  Wiring harness connector (wiring harness side) terminal 5

• Circuit interruption between:
  B69 Air Mass Meter
  Wiring harness connector (wiring harness side) terminal 4
  &
  A84 Control Unit - Engine
  Wiring harness connector (wiring harness side) terminal 24 (XC7)

• Circuit interruption between:
  B69 Air Mass Meter
  Wiring harness connector (wiring harness side) terminal 3
  &
  A84 Control Unit - Engine
  Wiring harness connector (wiring harness side) terminal 26 (XC7)

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.

• If the nominal value is reached during one of the measurements, the component/control unit that has been disconnected immediately before that measurement is defective.

• 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 voltage between:
  A84 Control Unit - Engine
  Wiring harness connector (wiring harness side) terminal 26 (XC7)
  &
  B69 Air Mass Meter
  Wiring harness connector (wiring harness side) terminal 3
  &
  Concerned terminals of all wiring harness connectors, which are connected with the corresponding lead.

• Circuit interruption between:
  X125 Underhood Electronic Module
  Wiring harness connector (wiring harness side) terminal 22 (XE3)
  &
  B69 Air Mass Meter
  Wiring harness connector (wiring harness side) terminal 2

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.