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C-027 O2 Sensor Circuit (Before Catalyst) > < C-025 Charcoal Canister Purge Valve Circuit

Astra H

C-026 - O2 Sensor Heater Circuit (Before Catalyst)

Test

Work Order Description

Nominal Value
T001

Check: Short to Ground/Interruption of Voltage Supply Circuit
  • Ignition OFF
  • Disconnect wiring harness connector from:
    B166 Sensor - Oxygen, Mixture Control, Heated
  • Ignition ON
  • Measure voltage between the following terminals:
    B166 Sensor - Oxygen, Mixture Control, Heated
    Wiring harness connector (wiring harness side) terminal 3
    &
    Ground

greater than 11 V
Voltage Measurement Current Value: V
Yes: No:
T002

Check: Short to Voltage of Signal Circuit
  • Ignition OFF
    Disconnect wiring harness connector from:
    A84 Control Unit - Engine
  • Ignition ON
  • Measure voltage between the following terminals:
    B166 Sensor - Oxygen, Mixture Control, Heated
    Wiring harness connector (wiring harness side) terminal 1
    &
    Ground

less than 0.3 V
Voltage Measurement Current Value: V
Yes: No:
T003

Check: Short to Ground/Interruption of Signal Circuit
  • Ignition OFF
  • Measure resistance between the following terminals:
    B166 Sensor - Oxygen, Mixture Control, Heated
    Wiring harness connector (wiring harness side) terminal 1
    &
    Ground

greater than 500 kOhm
Resistance Measurement Current Value: kOhm
Yes: No:
T004

Check: Interruption of Signal Circuit
  • Measure resistance between the following terminals:
    A84 Control Unit - Engine
    Wiring harness connector (wiring harness side) terminal 58 (XC3)
    &
    B166 Sensor - Oxygen, Mixture Control, Heated
    Wiring harness connector (wiring harness side) terminal 1

less than 5 Ohm
Resistance Measurement Current Value: Ohm
Yes: No:
T005

Check: Component
  • Measure resistance between the following terminals:
    B166 Sensor - Oxygen, Mixture Control, Heated
    Wiring harness connector (component side) terminal 1
    &
    B166 Sensor - Oxygen, Mixture Control, Heated
    Wiring harness connector (component side) terminal 3

3 ... 10 Ohm
Resistance Measurement Current Value: Ohm
Yes: No:
T006

Check: Component
  • Measure resistance between the following terminals:
    B166 Sensor - Oxygen, Mixture Control, Heated
    Wiring harness connector (component side) terminal 1
    &
    Ground

greater than 500 kOhm
Resistance Measurement Current Value: kOhm
Yes: No:
T007

Check: Component
  • Measure resistance between the following terminals:
    B166 Sensor - Oxygen, Mixture Control, Heated
    Wiring harness connector (component side) terminal 1
    &
    B166 Sensor - Oxygen, Mixture Control, Heated
    Wiring harness connector (component side) terminal 3

greater than 10 Ohm
Resistance Measurement Current Value: Ohm
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: Short to Ground
  • Short circuit to ground between:
    B166 Sensor - Oxygen, Mixture Control, Heated
    Wiring harness connector (component side) terminal 1
    &
    B166 Sensor - Oxygen, Mixture Control, Heated
    Wiring harness connector (component side) terminal 3

or

  • Defective component:
    B166 Sensor - Oxygen, Mixture Control, Heated
E003 Result: Interruption
  • Circuit interruption between:
    B166 Sensor - Oxygen, Mixture Control, Heated
    Wiring harness connector (component side) terminal 1
    &
    B166 Sensor - Oxygen, Mixture Control, Heated
    Wiring harness connector (component side) terminal 3

or

  • Defective component:
    B166 Sensor - Oxygen, Mixture Control, Heated
E004 Result: Short Circuit in Wiring Harness
  • Short circuit in wiring harness between:
    B166 Sensor - Oxygen, Mixture Control, Heated
    Wiring harness connector (component side) terminal 1
    &
    B166 Sensor - Oxygen, Mixture Control, Heated
    Wiring harness connector (component side) terminal 3

or

  • Defective component:
    B166 Sensor - Oxygen, Mixture Control, Heated
E005 Result: Interruption
  • Circuit interruption between:
    A84 Control Unit - Engine
    Wiring harness connector (wiring harness side) terminal 58 (XC3)
    &
    B166 Sensor - Oxygen, Mixture Control, Heated
    Wiring harness connector (wiring harness side) terminal 1
E006 Result: Short to Ground
  • Short circuit to ground between:
    A84 Control Unit - Engine
    Wiring harness connector (wiring harness side) terminal 58 (XC3)
    &
    B166 Sensor - Oxygen, Mixture Control, Heated
    Wiring harness connector (wiring harness side) terminal 1
E007 Result: Short to Voltage
  • Short circuit to voltage between:
    A84 Control Unit - Engine
    Wiring harness connector (wiring harness side) terminal 58 (XC3)
    &
    B166 Sensor - Oxygen, Mixture Control, Heated
    Wiring harness connector (wiring harness side) terminal 1
E008 Result: Interruption
  • Circuit interruption between:
    X125 Underhood Electronic Module
    Wiring harness connector (wiring harness side) terminal 29 (XE3)
    &
    B166 Sensor - Oxygen, Mixture Control, Heated
    Wiring harness connector (wiring harness side) terminal 3

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.





C-027 O2 Sensor Circuit (Before Catalyst) > < C-025 Charcoal Canister Purge Valve Circuit