Vauxhall Workshop Service and Repair Manuals

Test

Work Order Description

Nominal Value

Check: Component

• Ignition OFF
• Disconnect wiring harness connector from:
  S187 Switch - Automatic Transmission
• Connect wiring harness connector to:
  Checking box KM-962
  &
  S187 Switch - Automatic Transmission
  &
  G1 Battery
• Ignition ON
• Verify electrical system functions:
  S187 Switch - Automatic Transmission
  Selector lever in position P, R, N, D, 3, 2, 1

Test okay?

Check: Interruption of Voltage Supply Circuit

• Ignition OFF
• Disconnect wiring harness connector from:
  Checking box KM-962
• Ignition ON
• Measure voltage between the following terminals:
  S187 Switch - Automatic Transmission
  Wiring harness connector (wiring harness side) terminal 8
  &
  Ground

greater than 11 V

Check: Short to Voltage of Signal Circuit

• Selector lever in position N, D
• Diagnostic Tester Data List Parameter
  Terminal A Selector Position Switch

Inactive 0V

Check: Interruption of Signal Circuit

• Selector lever in position P
• Diagnostic Tester Data List Parameter
  Terminal A Selector Position Switch

Active 12V

Check: Short to Voltage of Signal Circuit

• Selector lever in position P
• Diagnostic Tester Data List Parameter
  Terminal B Selector Position Switch

Inactive 0V

Check: Interruption of Signal Circuit

• Selector lever in position R, N, D
• Diagnostic Tester Data List Parameter
  Terminal B Selector Position Switch

Active 12V

Check: Short to Voltage of Signal Circuit

• Selector lever in position P, R, N
• Diagnostic Tester Data List Parameter
  Terminal C Selector Position Switch

Inactive 0V

Check: Interruption of Signal Circuit

• Selector lever in position D
• Diagnostic Tester Data List Parameter
  Terminal C Selector Position Switch

Active 12V

Check: Interruption of Signal Circuit

• Selector lever in position P, N
• Diagnostic Tester Data List Parameter
  Terminal D Selector Position Switch

Active 12V

Result

Cause Of Fault

• Short circuit to voltage between:
  S187 Switch - Automatic Transmission
  Wiring harness connector (wiring harness side) terminal 4
  &
  A3 Display - Selector Lever Position
  Wiring harness connector (wiring harness side) terminal 11
  &
  A112 Control Unit - Transmission
  Wiring harness connector (wiring harness side) terminal 24

or

• Defective component:
  A112 Control Unit - Transmission

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:
  S187 Switch - Automatic Transmission
  Wiring harness connector (wiring harness side) terminal 4
  &
  A112 Control Unit - Transmission
  Wiring harness connector (wiring harness side) terminal 24

or

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:
  S187 Switch - Automatic Transmission
  Wiring harness connector (wiring harness side) terminal 3
  &
  A112 Control Unit - Transmission
  Wiring harness connector (wiring harness side) terminal 25

or

• Defective component:
  A112 Control Unit - Transmission

Note:

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:
  S187 Switch - Automatic Transmission
  Wiring harness connector (wiring harness side) terminal 3
  &
  A3 Display - Selector Lever Position
  Wiring harness connector (wiring harness side) terminal 10
  &
  A112 Control Unit - Transmission
  Wiring harness connector (wiring harness side) terminal 25

or

• Defective component:
  A112 Control Unit - Transmission

Note:

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:
  S187 Switch - Automatic Transmission
  Wiring harness connector (wiring harness side) terminal 2
  &
  A112 Control Unit - Transmission
  Wiring harness connector (wiring harness side) terminal 3

or

• Defective component:
  A112 Control Unit - Transmission

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:
  S187 Switch - Automatic Transmission
  Wiring harness connector (wiring harness side) terminal 2
  &
  A3 Display - Selector Lever Position
  Wiring harness connector (wiring harness side) terminal 9
  &
  A112 Control Unit - Transmission
  Wiring harness connector (wiring harness side) terminal 3

or

• Defective component:
  A112 Control Unit - Transmission

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:
  S187 Switch - Automatic Transmission
  Wiring harness connector (wiring harness side) terminal 1
  &
  A112 Control Unit - Transmission
  Wiring harness connector (wiring harness side) terminal 4

or

• Defective component:
  A112 Control Unit - Transmission

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:
  S187 Switch - Automatic Transmission
  Wiring harness connector (wiring harness side) terminal 1
  &
  A3 Display - Selector Lever Position
  Wiring harness connector (wiring harness side) terminal 8
  &
  A112 Control Unit - Transmission
  Wiring harness connector (wiring harness side) terminal 4

or

• Defective component:
  A112 Control Unit - Transmission

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:
  FE7 Fuse
  Output contact
  &
  S187 Switch - Automatic Transmission
  Wiring harness connector (wiring harness side) terminal 8

• Adjust selector lever position switch/actuating cable

or

• Defective component:
  S187 Switch - Automatic Transmission

Note:

Refer to Service Manual

000601975

000601976

000601977