Vauxhall Workshop Service and Repair Manuals

Test

Work Order Description

Nominal Value

Check: Diagnostic Trouble Code stored

Is the following Diagnostic Trouble Code stored?

P1900

Exhaust Gas Temperature Sensor (Bank 1 Sensor 1) not plausible with Intake Air Temperature

Check: Interruption of Voltage Supply Circuit

• Ignition OFF
• Disconnect wiring harness connector from:
  B173 Sensor - Temperature, Exhaust Gas
• Ignition ON
• Measure voltage between the following terminals:
  B173 Sensor - Temperature, Exhaust Gas
  Wiring harness connector (wiring harness side) terminal 2
  &
  B173 Sensor - Temperature, Exhaust Gas
  Wiring harness connector (wiring harness side) terminal 1

4.8 ... 5.2 V

Check: Component

• Ignition OFF
• Measure resistance between the following terminals:
  B173 Sensor - Temperature, Exhaust Gas
  Wiring harness connector (component side) terminal 2
  &
  B173 Sensor - Temperature, Exhaust Gas
  Wiring harness connector (component side) terminal 1

200 ... 600 Ohm

Check: Short to Voltage/Interruption of Ground Circuit

• Measure voltage between:
  B173 Sensor - Temperature, Exhaust Gas
  Wiring harness connector (wiring harness side) terminal 2
  &
  Ground

4.8 ... 5.2 V

Check: Short to Voltage/Interruption of Ground Circuit

• Measure voltage between:
  B173 Sensor - Temperature, Exhaust Gas
  Wiring harness connector (wiring harness side) terminal 2
  &
  Ground

less than 4.8 V

Result

Cause Of Fault

• Defective component:
  B173 Sensor - Temperature, Exhaust Gas

• 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.

• Defective component:
  B173 Sensor - Temperature, Exhaust Gas

• Short to voltage/ground/interruption of circuit between:
• B173 Sensor - Temperature, Exhaust Gas
  Wiring harness connector (wiring harness side) terminal 1
  &
  A84 Control Unit - Engine
  Wiring harness connector (wiring harness side) terminal 35 (XC53)

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/interruption of circuit between:
  B173 Sensor - Temperature, Exhaust Gas
  Wiring harness connector (wiring harness side) terminal 2
  &
  A84 Control Unit - Engine
  Wiring harness connector (wiring harness side) terminal 34 (XC53)

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:
  B173 Sensor - Temperature, Exhaust Gas
  Wiring harness connector (wiring harness side) terminal 2
  &
  A84 Control Unit - Engine
  Wiring harness connector (wiring harness side) terminal 34 (XC53)

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.