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Vauxhall Workshop Service and Repair Manuals

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C-020 O2 Sensor Circuit (Before Catalyst) > < C-018 O2 Sensor Heater Circuit (Behind Catalyst)

Astra H

C-019 - O2 Sensor Circuit (Bank 1, Sensor 1)

Test

Work Order Description

Nominal Value
T001

Check: Short to Voltage/Ground of Signal Circuit
  • Ignition OFF
  • Disconnect wiring harness connector from:
    B166 Sensor - Oxygen, Mixture Control, Heated
  • Ignition ON
  • Diagnostic Tester Data List Parameter
    B1 Short Term Fuel Trim (Bank 1)

430 ... 470 mV
Diagnostic Tester Data List Parameter Current Value:
Yes: No:
T002

Check: Interruption of Signal Circuit
  • Measure voltage between the following terminals:
    B166 Sensor - Oxygen, Mixture Control, Heated
    Wiring harness connector (wiring harness side) terminal 4
    &
    Ground

430 ... 470 mV
Voltage Measurement Current Value: mV
Yes: No:
T003

Check: Component
  • Measure voltage between the following terminals:
    B166 Sensor - Oxygen, Mixture Control, Heated
    Wiring harness connector (wiring harness side) terminal 3
    &
    Ground

less than 0.3 V
Voltage Measurement Current Value: V
Yes: No:
T004

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:
    B166 Sensor - Oxygen, Mixture Control, Heated
    Wiring harness connector (wiring harness side) terminal 4
    &
    Ground

greater than 500 kOhm
Resistance Measurement Current Value: kOhm
Yes: No:
T005

Check: Circuit Interruption of Ground Circuit
  • Measure resistance between the following terminals:
    B166 Sensor - Oxygen, Mixture Control, Heated
    Wiring harness connector (wiring harness side) terminal 4
    &
    A84 Control Unit - Engine
    Wiring harness connector (wiring harness side) terminal 8 (XC7)

less than 5 Ohm
Resistance Measurement Current Value: Ohm
Yes: No:
T006

Check: Mechanical Functionality
  • Check mechanical functionality of the following components and all attached parts:
    Exhaust system
    Intake system
    Injection valves
    Fuel pressure

Test okay?
Yes: No:
T007

Check: Short to Voltage/Ground of Signal Circuit
  • Ignition OFF
  • Disconnect wiring harness connector from:
    B166 Sensor - Oxygen, Mixture Control, Heated
  • Ignition ON
  • Diagnostic Tester Data List Parameter
    B1 Short Term Fuel Trim (Bank 1)

less than 430 mV
Diagnostic Tester Data List Parameter Current Value:
Yes: No:


Result

Cause Of Fault
E001 Result: Defective Component
  • Defective component:
    B166 Sensor - Oxygen, Mixture Control, Heated

Note:

Check all wiring and all connectors of this functional group for corrosion and damage.
E002 Result: Defective Component
  • Repair the concerned circuit/component.
E003 Result: Interruption
  • Circuit interruption between:
    B166 Sensor - Oxygen, Mixture Control, Heated
    Wiring harness connector (wiring harness side) terminal 4
    &
    A84 Control Unit - Engine
    Wiring harness connector (wiring harness side) terminal 8 (XC7)
E004 Result: Short to Ground
  • Short circuit to ground between:
    B166 Sensor - Oxygen, Mixture Control, Heated
    Wiring harness connector (wiring harness side) terminal 4
    &
    A84 Control Unit - Engine
    Wiring harness connector (wiring harness side) terminal 8 (XC7)
E005 Result: Short to Voltage
  • Short circuit to voltage between:
    A84 Control Unit - Engine
    Wiring harness connector (wiring harness side) terminal 8 (XC7)
    &
    B166 Sensor - Oxygen, Mixture Control, Heated
    Wiring harness connector (wiring harness side) terminal 4

Note:

Check all wiring and all connectors of this functional group for corrosion and damage.
E006 Result: Interruption
  • Circuit interruption between:
    A84 Control Unit - Engine
    Wiring harness connector (wiring harness side) terminal 25 (XC7)
    &
    B166 Sensor - Oxygen, Mixture Control, Heated
    Wiring harness connector (wiring harness side) terminal 3

Note:

Check all wiring and all connectors of this functional group for corrosion and damage.
E007 Result: Short to Ground
  • Short circuit to ground between:
    A84 Control Unit - Engine
    Wiring harness connector (wiring harness side) terminal 25 (XC7)
    &
    B166 Sensor - Oxygen, Mixture Control, Heated
    Wiring harness connector (wiring harness side) terminal 3

Note:

Check all wiring and all connectors of this functional group for corrosion and damage.
E008 Result: Short to Voltage
  • Short circuit to voltage between:
    B166 Sensor - Oxygen, Mixture Control, Heated
    Wiring harness connector (wiring harness side) terminal 3
    &
    A84 Control Unit - Engine
    Wiring harness connector (wiring harness side) terminal 25 (XC7)

Note:

Check all wiring and all connectors of this functional group for corrosion and damage.





C-020 O2 Sensor Circuit (Before Catalyst) > < C-018 O2 Sensor Heater Circuit (Behind Catalyst)