Vauxhall Workshop Service and Repair Manuals

Test

Work Order Description

Nominal Value

Check: Interruption of Voltage Supply Circuit

• Ignition OFF
• All consumers turned off
• Disconnect wiring harness connector from:
  A155 Radio - Infotainment Unit
  &
  Diagnostic tester
• Ignition ON
  Measure voltage between the following terminals:
  A155 Radio - Infotainment Unit
  Wiring harness connector (wiring harness side) terminal 15(XC31)
  &
  Ground

greater than 11 V

Check: Circuit Interruption of Ground Circuit

• Measure voltage between the following terminals:
  A155 Radio - Infotainment Unit
  Wiring harness connector (wiring harness side) terminal 12(XC31)
  &
  Battery voltage

greater than 11 V

Check: Short to Voltage of Signal Circuit

• Ignition OFF
• Disconnect wiring harness connector from:
  Info Display
  (Wiring Harness Connector XC23 )
• Connect fused jumper wire to:
  X40 Diagnostic Link
  Wiring harness connector (wiring harness side) terminal 11
  &
  X40 Diagnostic Link
  Wiring harness connector (wiring harness side) terminal 3
• Ignition ON
• Measure voltage between the following terminals:
  Info Display
  Wiring harness connector (wiring harness side) terminal 23(XC23)
  &
  Ground

less than 0.3 V

Check: Short to Ground of Signal Circuit

• Ignition OFF
• Measure resistance between the following terminals:
  Info Display
  Wiring harness connector (wiring harness side) terminal 23(XC23)
  &
  Ground

greater than 500 kOhm

Check: Interruption of Signal Circuit

• Measure resistance between the following terminals:
  Info Display
  Wiring harness connector (wiring harness side) terminal 23(XC23)
  &
  Info Display
  Wiring harness connector (wiring harness side) terminal 22(XC23)

less than 5 Ohm

Check: Short Circuit in Wiring Harness

• Remove fused jumper wire
• Measure resistance between the following terminals:
  Info Display
  Wiring harness connector (wiring harness side) terminal 23(XC23)
  &
  Info Display
  Wiring harness connector (wiring harness side) terminal 22(XC23)

greater than 500 kOhm

Check: Vehicle Configuration

Is the following information correct for the actual vehicle?

Check: Component

• Ignition OFF
• Connect diagnostic tester to the diagnostic link
• Connect wiring harness connector to:
  P6 Info Display
  &
  A155 Radio - Infotainment Unit
• Ignition ON
• Disconnect wiring harness connector from:
  A94 Control Unit - Digital Audio Broadcast
• Select ECU Presence Check.

Is the following display shown on the diagnostic tester?

No Communication with EHU

Check: Vehicle Configuration

Is the following information correct for the actual vehicle?

Check: Component

• Ignition OFF
• Disconnect wiring harness connector from:
  A1_A14 Control Unit - Climate Control
• Ignition ON
  Select ECU Presence Check.

Is the following display shown on the diagnostic tester?

No Communication with EHU

Check: Short to Voltage of Signal Circuit

• Ignition OFF
• Disconnect wiring harness connector from:
  P6 Info Display
• Ignition ON
• Measure voltage between the following terminals:
  P6 Info Display
  Wiring harness connector (wiring harness side) terminal 18,17(XC23)
  &
  Ground

less than 0.3 V

Check: Short to Ground of Signal Circuit

• Ignition OFF
• Measure resistance between the following terminals:
  P6 Info Display
  Wiring harness connector (wiring harness side) terminal 18,17(XC23)
  &
  Ground

greater than 500 kOhm

Check: Short Circuit in Wiring Harness

• Measure resistance between the following terminals:
  P6 Info Display
  Wiring harness connector (wiring harness side) terminal 18(XC23)
  &
  P6 Info Display
  Wiring harness connector (wiring harness side) terminal 17(XC23)

greater than 500 kOhm

Check: Vehicle Configuration

Is the following information correct for the actual vehicle?

Check: Interruption of Signal Circuit

• Connect fused jumper wire to:
  P6 Info Display
  Wiring harness connector (wiring harness side) terminal 19 (XC23)
  &
  P6 Info Display
  Wiring harness connector (wiring harness side) terminal 20 (XC23)
• Measure resistance between the following terminals:
  A155 Radio - Infotainment Unit
  Wiring harness connector (wiring harness side) terminal 10(XC31)
  &
  A155 Radio - Infotainment Unit
  Wiring harness connector (wiring harness side) terminal 9 (XC31)

less than 5 Ohm

Check: Vehicle Configuration

Is the following information correct for the actual vehicle?

Check: Short to Voltage of Signal Circuit

• Ignition OFF
• Disconnect wiring harness connector from:
  A176 Control Unit - Voice Controlled Telephone
• Ignition ON
• Measure voltage between the following terminals:
  A176 Control Unit - Voice Controlled Telephone
  Wiring harness connector (wiring harness side) terminal 29, 30
  &
  Ground

less than 0.3 V

Check: Short to Ground of Signal Circuit

• Measure resistance between the following terminals:
  A176 Control Unit - Voice Controlled Telephone
  Wiring harness connector (wiring harness side) terminal 29, 30
  &
  Ground

greater than 500 kOhm

Check: Interruption of Signal Circuit

• Ignition OFF
• Connect fused jumper wire to:
  P6 Info Display
  Wiring harness connector (wiring harness side) terminal 19 (XC23)
  &
  P6 Info Display
  Wiring harness connector (wiring harness side) terminal 20 (XC23)
• Measure resistance between the following terminals:
  A176 Control Unit - Voice Controlled Telephone
  Wiring harness connector (wiring harness side) terminal 30
  &
  A176 Control Unit - Voice Controlled Telephone
  Wiring harness connector (wiring harness side) terminal 29

less than 5 Ohm

Check: Short Circuit in Wiring Harness

• Ignition OFF
• Remove fused jumper wire
• Measure resistance between the following terminals:
  A176 Control Unit - Voice Controlled Telephone
  Wiring harness connector (wiring harness side) terminal 29
  &
  A176 Control Unit - Voice Controlled Telephone
  Wiring harness connector (wiring harness side) terminal 30

greater than 500 kOhm

Check: Short to Voltage of Signal Circuit

• Disconnect wiring harness connector from:
  A155 Radio - Infotainment Unit
• Ignition ON
• Measure voltage between the following terminals:
  A155 Radio - Infotainment Unit
  Wiring harness connector (wiring harness side) terminal 9, 10 (XC31)
  &
  Ground

less than 0.3 V

Check: Short to Ground of Signal Circuit

• Measure resistance between the following terminals:
  A155 Radio - Infotainment Unit
  Wiring harness connector (wiring harness side) terminal 9, 10 (XC31)
  &
  Ground

greater than 500 kOhm

Check: Interruption of Signal Circuit

• Ignition OFF
• Remove fused jumper wire
• Connect fused jumper wire to:
  A176 Control Unit - Voice Controlled Telephone
  Wiring harness connector (wiring harness side) terminal 13
  &
  A176 Control Unit - Voice Controlled Telephone
  Wiring harness connector (wiring harness side) terminal 14
• Measure resistance between the following terminals:
  A155 Radio - Infotainment Unit
  Wiring harness connector (wiring harness side) terminal 9 (XC31)
  &
  A155 Radio - Infotainment Unit
  Wiring harness connector (wiring harness side) terminal 10 (XC31)

less than 5 Ohm

Check: Short Circuit in Wiring Harness

• Remove fused jumper wire
• Measure resistance between the following terminals:
  A155 Radio - Infotainment Unit
  Wiring harness connector (wiring harness side) terminal 9 (XC31)
  &
  A155 Radio - Infotainment Unit
  Wiring harness connector (wiring harness side) terminal 10 (XC31)

greater than 500 kOhm

Check: Short to Voltage of Signal Circuit

• Disconnect wiring harness connector from:
  A155 Radio - Infotainment Unit
• Measure voltage between the following terminals:
  A155 Radio - Infotainment Unit
  Wiring harness connector (wiring harness side) terminal 10,9 (XC31)
  &
  Ground

less than 0.3 V

Check: Short to Ground of Signal Circuit

• Ignition OFF
• Measure resistance between the following terminals:
  A155 Radio - Infotainment Unit
  Wiring harness connector (wiring harness side) terminal 10,9(XC31)
  &
  Ground

greater than 500 kOhm

Check: Interruption of Signal Circuit

• Connect wiring harness connector to:
  P6 Info Display
• Measure resistance between the following terminals:
  A155 Radio - Infotainment Unit
  Wiring harness connector (wiring harness side) terminal 10(XC31)
  &
  A155 Radio - Infotainment Unit
  Wiring harness connector (wiring harness side) terminal 9(XC31)

110 ... 130 Ohm

Check: Interruption of Signal Circuit

• Connect wiring harness connector to:
  P6 Info Display
• Measure resistance between the following terminals:
  A155 Radio - Infotainment Unit
  Wiring harness connector (wiring harness side) terminal 10(XC31)
  &
  A155 Radio - Infotainment Unit
  Wiring harness connector (wiring harness side) terminal 9(XC31)

less than 110 Ohm

Check: Interruption of Signal Circuit

• Measure resistance between the following terminals:
  A155 Radio - Infotainment Unit
  Wiring harness connector (wiring harness side) terminal 10 (XC31)
  &
  A155 Radio - Infotainment Unit
  Wiring harness connector (wiring harness side) terminal 9 (XC31)

50 ... 70 Ohm

Check: Vehicle Configuration

Is the following information correct for the actual vehicle?

Check: Interruption of Signal Circuit

• Connect fused jumper wire to:
  P6 Info Display
  Wiring harness connector (wiring harness side) terminal 18 (XC23)
  &
  P6 Info Display
  Wiring harness connector (wiring harness side) terminal 17 (XC23)
• Measure resistance between the following terminals:
  A94 Control Unit - Digital Audio Broadcast
  Wiring harness connector (wiring harness side) terminal 3
  &
  A94 Control Unit - Digital Audio Broadcast
  Wiring harness connector (wiring harness side) terminal 12

less than 5 Ohm

Check: Vehicle Configuration

Is the following information correct for the actual vehicle?

Check: Component

• Ignition OFF
• Connect diagnostic tester to the diagnostic link
• Connect wiring harness connector to:
  P6 Info Display
  &
  A155 Radio - Infotainment Unit
• Disconnect wiring harness connector from:
  A1_A14 Control Unit - Electronic Climate Control ECC
• Ignition ON
• Select ECU Presence Check.

Is the following display shown on the diagnostic tester?

No Communication with EHU

Check: Interruption of Voltage Supply Circuit

• Ignition OFF
• Remove electrical component from socket:
  FE35 Fuse
• Ignition ON
• Measure voltage between the following terminals:
  FE35 Fuse
  Input contact
  &
  Ground

greater than 11 V

Result

Cause Of Fault

• Defective component:
  P6 Info Display
  or
  A176 Control Unit - Voice Controlled Telephone
  or
  A155 Radio - Infotainment Unit

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.

• Short circuit in wiring harness between:
  A155 Radio - Infotainment Unit
  Wiring harness connector (wiring harness side) terminal 9 (XC31)
  &
  A155 Radio - Infotainment Unit
  Wiring harness connector (wiring harness side) terminal 10 (XC31)

• Short to voltage/ground/interruption of circuit between:
  A176 Control Unit - Voice Controlled Telephone
  Wiring harness connector (wiring harness side) terminal 13
  &
  A155 Radio - Infotainment Unit
  Wiring harness connector (wiring harness side) terminal 9 (XC31)
  or
  A176 Control Unit - Voice Controlled Telephone
  Wiring harness connector (wiring harness side) terminal 14
  &
  A155 Radio - Infotainment Unit
  Wiring harness connector (wiring harness side) terminal 10 (XC31)

• Short circuit in wiring harness between:
  A176 Control Unit - Voice Controlled Telephone
  Wiring harness connector (wiring harness side) terminal 29
  &
  A176 Control Unit - Voice Controlled Telephone
  Wiring harness connector (wiring harness side) terminal 30

• Short to voltage/ground/interruption of circuit between:
  A176 Control Unit - Voice Controlled Telephone
  Wiring harness connector (wiring harness side) terminal 29
  &
  P6 Info Display
  Wiring harness connector (wiring harness side) terminal 20 (XC23)
  or
  A176 Control Unit - Voice Controlled Telephone
  Wiring harness connector (wiring harness side) terminal 30
  &
  P6 Info Display
  Wiring harness connector (wiring harness side) terminal 19 (XC23)

• Defective component:
  A155 Radio - Infotainment Unit
  or
  P6 Info Display

Note:

The replacement of the components must be done in the listed order.

The system must be checked for proper operation after every replacement.

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 in wiring harness between:
  A155 Radio - Infotainment Unit
  Wiring harness connector (wiring harness side) terminal 10(XC31)
  &
  A155 Radio - Infotainment Unit
  Wiring harness connector (wiring harness side) terminal 9(XC31)

or

• Defective component:
  P6 Info Display

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:
  A155 Radio - Infotainment Unit
  Wiring harness connector (wiring harness side) terminal 10(XC31)
  &
  A155 Radio - Infotainment Unit
  Wiring harness connector (wiring harness side) terminal 9(XC31)

or

• Defective component:
  P6 Info Display

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 to voltage/ground of circuit between:
  A155 Radio - Infotainment Unit
  Wiring harness connector (wiring harness side) terminal 9(XC31)
  &
  P6 Info Display
  Wiring harness connector (wiring harness side) terminal 20(XC23)
  or
  A155 Radio - Infotainment Unit
  Wiring harness connector (wiring harness side) terminal 10(XC31)
  &
  P6 Info Display
  Wiring harness connector (wiring harness side) terminal 19(XC23)

• Short to voltage/ground/interruption of circuit between:
  P6 Info Display
  Wiring harness connector (wiring harness side) terminal 18(XC23)
  &
  A94 Control Unit - Digital Audio Broadcast
  Wiring harness connector (wiring harness side) terminal 12
  or
  P6 Info Display
  Wiring harness connector (wiring harness side) terminal 17(XC23)
  &
  A94 Control Unit - Digital Audio Broadcast
  Wiring harness connector (wiring harness side) terminal 3
  &
  Wiring harness connector terminals of all components (wiring harness side), which were disconnected from the wiring harness during this troubleshooting session

• Short to voltage/ground/interruption of circuit between:
  P6 Info Display
  Wiring harness connector (wiring harness side) terminal 18(XC23)
  &
  A1_A14 Control Unit - Electronic Climate Control ECC
  Wiring harness connector (wiring harness side) terminal 13(XC42)
  or
  P6 Info Display
  Wiring harness connector (wiring harness side) terminal 17(XC23)
  &
  A1_A14 Control Unit - Electronic Climate Control ECC
  Wiring harness connector (wiring harness side) terminal 14(XC42)
  &
  Wiring harness connector terminals of all components (wiring harness side), which were disconnected from the wiring harness during this troubleshooting session

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 in wiring harness between:
  P6 Info Display
  Wiring harness connector (wiring harness side) terminal 18(XC23)
  &
  P6 Info Display
  Wiring harness connector (wiring harness side) terminal 17(XC23)

• Short to voltage/ground of circuit between:
  A1_A14 Control Unit - Electronic Climate Control ECC
  Wiring harness connector (wiring harness side) terminal 30(XC42)
  &
  A94 Control Unit - Digital Audio Broadcast
  Wiring harness connector (wiring harness side) terminal 3
  or
  A1_A14 Control Unit - Electronic Climate Control ECC
  Wiring harness connector (wiring harness side) terminal 29(XC42)
  &
  A94 Control Unit - Digital Audio Broadcast
  Wiring harness connector (wiring harness side) terminal 12

or

• Defective component:
  A1_A14 Control Unit - Electronic Climate Control ECC

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:
  A94 Control Unit - Digital Audio Broadcast

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:
  A1_A14 Control Unit - Electronic Climate Control ECC

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 in wiring harness between:
  P6 Info Display
  Wiring harness connector (wiring harness side) terminal 20(XC23)
  &
  P6 Info Display
  Wiring harness connector (wiring harness side) terminal 19(XC23)

• Short to voltage/ground/interruption of circuit between:
  P6 Info Display
  Wiring harness connector (wiring harness side) terminal 23(XC23)
  &
  X40 Diagnostic Link
  Wiring harness connector (wiring harness side) terminal 11
  or
  P6 Info Display
  Wiring harness connector (wiring harness side) terminal 22(XC23)
  &
  X40 Diagnostic Link
  Wiring harness connector (wiring harness side) terminal 3

• Circuit interruption between:
  A155 Radio - Infotainment Unit
  Wiring harness connector (wiring harness side) terminal 12(XC31)
  &
  Ground

• Circuit interruption between:
  X125 Underhood Electronic Module
  Socket Terminal 61 (XE2)
  &
  A155 Radio - Infotainment Unit
  Wiring harness connector (wiring harness side) terminal 15(XC31)

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.

• 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.