Vauxhall Workshop Service and Repair Manuals

Test

Work Order Description

Nominal Value

Check: Short to Voltage/Ground of Signal Circuit

• Ignition OFF
• Disconnect wiring harness connector from:
  B57 Sensor - Oxygen, Catalytic Converter Check
• Ignition ON
• Diagnostic Tester Data List Parameter
  B1S2 O2 Sensor (Bank 1 Sensor 2)

400 ... 500 mV

Check: Interruption of Signal Circuit

• Measure voltage between the following terminals:
  B57 Sensor - Oxygen, Catalytic Converter Check
  Wiring harness connector (wiring harness side) terminal 2
  &
  Ground

200 ... 450 mV

Check: Short to Voltage of Ground Circuit

• Measure voltage between the following terminals:
  B57 Sensor - Oxygen, Catalytic Converter Check
  Wiring harness connector (wiring harness side) terminal 4
  &
  Ground

less than 0.3 V

Check: Short to Ground of Signal Circuit

• Ignition OFF
• Disconnect wiring harness connector from:
  A84 Control Unit - Engine
• Measure resistance between the following terminals:
  B57 Sensor - Oxygen, Catalytic Converter Check
  Wiring harness connector (wiring harness side) terminal 4
  &
  Ground

greater than 500 kOhm

Check: Circuit Interruption of Ground Circuit

• Measure resistance between the following terminals:
  B57 Sensor - Oxygen, Catalytic Converter Check
  Wiring harness connector (wiring harness side) terminal 4
  &
  A84 Control Unit - Engine
  Wiring harness connector (wiring harness side) terminal 29 (XC101)

less than 5 Ohm

Check: Tightness

• Check the following components for tightness:
  Exhaust system

Test okay?

Check: Mechanical Functionality

• Check the catalytic converter for mechanical damages
  (Tears in the outer case, damages of the internal catalyst bed)

Test okay?

Check: Short to Voltage/Ground of Signal Circuit

• Ignition OFF
• Disconnect wiring harness connector from:
  B57 Sensor - Oxygen, Catalytic Converter Check
• Ignition ON
• Diagnostic Tester Data List Parameter
  B1S2 O2 Sensor (Bank 1 Sensor 2)

less than 400 mV

Result

Cause Of Fault

• Defective component:
  B57 Sensor - Oxygen, Catalytic Converter Check
  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.

• Defective component:
  Catalytic Converter

• Following system/component is faulty:
  Exhaust system

• Circuit interruption between:
  A84 Control Unit - Engine
  Wiring harness connector (wiring harness side) terminal 29 (XC101)
  &
  B57 Sensor - Oxygen, Catalytic Converter Check
  Wiring harness connector (wiring harness side) terminal 4

• Short circuit to ground between:
  A84 Control Unit - Engine
  Wiring harness connector (wiring harness side) terminal 29 (XC101)
  &
  B57 Sensor - Oxygen, Catalytic Converter Check
  Wiring harness connector (wiring harness side) terminal 4

• Short circuit to voltage between:
  A84 Control Unit - Engine
  Wiring harness connector (wiring harness side) terminal 29 (XC101)
  &
  B57 Sensor - Oxygen, Catalytic Converter Check
  Wiring harness connector (wiring harness side) terminal 4

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 54 (XC101)
  &
  B57 Sensor - Oxygen, Catalytic Converter Check
  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 circuit to ground between:
  A84 Control Unit - Engine
  Wiring harness connector (wiring harness side) terminal 54 (XC101)
  &
  B57 Sensor - Oxygen, Catalytic Converter Check
  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 circuit to voltage between:
  A84 Control Unit - Engine
  Wiring harness connector (wiring harness side) terminal 54 (XC101)
  &
  B57 Sensor - Oxygen, Catalytic Converter Check
  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.