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C-021 O2 Sensor Heater Circuit (Behind Catalyst) > < C-019 O2 Sensor Heater Circuit (Before Catalyst)

Astra H

C-020 - O2 Sensor Circuit (Before Catalyst)

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
    B1S1 O2 Sensor (Bank 1 Sensor 1)

450 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 2
    &
    Ground

400 ... 450 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 4
    &
    Ground

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

Check: Short to Ground of Signal Circuit
  • Ignition OFF
  • Disconnect wiring harness connector from:
    A84 Control Unit - Engine
  • 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 (XC3)

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
    B1S1 O2 Sensor (Bank 1 Sensor 1)

less than 450 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
    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.
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 (XC3)
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 (XC3)
E005 Result: Short to Voltage
  • Short circuit to voltage between:
    A84 Control Unit - Engine
    Wiring harness connector (wiring harness side) terminal 8 (XC3)
    &
    B166 Sensor - Oxygen, Mixture Control, Heated
    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.
E006 Result: Interruption
  • Circuit interruption between:
    A84 Control Unit - Engine
    Wiring harness connector (wiring harness side) terminal 57 (XC3)
    &
    B166 Sensor - Oxygen, Mixture Control, Heated
    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.
E007 Result: Short to Ground
  • Short circuit to ground between:
    A84 Control Unit - Engine
    Wiring harness connector (wiring harness side) terminal 57 (XC3)
    &
    B166 Sensor - Oxygen, Mixture Control, Heated
    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.
E008 Result: Short to Voltage
  • Short circuit to voltage between:
    B166 Sensor - Oxygen, Mixture Control, Heated
    Wiring harness connector (wiring harness side) terminal 2
    &
    A84 Control Unit - Engine
    Wiring harness connector (wiring harness side) terminal 57 (XC3)

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.





C-021 O2 Sensor Heater Circuit (Behind Catalyst) > < C-019 O2 Sensor Heater Circuit (Before Catalyst)