Vauxhall Workshop Service and Repair Manuals

Test

Work Order Description

Nominal Value

Check: Component

• Check cable shielding of following component:
  B65 Sensor - Knock Control

Test okay?

Check: Short to Voltage of Signal Circuit

• Ignition OFF
• Disconnect wiring harness connector from:
  B65 Sensor - Knock Control
• Ignition ON
• Measure voltage between the following terminals:
  B65 Sensor - Knock Control
  Wiring harness connector (wiring harness side) terminal 1, 2
  &
  Ground

less than 0.3 V

Check: Short to Ground of Signal Circuit

• Ignition OFF
• Disconnect wiring harness connector from:
  A84 Control Unit - Engine
  (Wiring Harness Connector XC9 )
• Measure resistance between the following terminals:
  B65 Sensor - Knock Control
  Wiring harness connector (wiring harness side) terminal 1
  &
  Ground

greater than 500 kOhm

Check: Short Circuit in Wiring Harness

• Measure resistance between the following terminals:
  B65 Sensor - Knock Control
  Wiring harness connector (wiring harness side) terminal 1
  &
  B65 Sensor - Knock Control
  Wiring harness connector (wiring harness side) terminal 2

greater than 500 kOhm

Check: Interruption of Signal Circuit

• Connect fused jumper wire to:
  A84 Control Unit - Engine
  Wiring harness connector (wiring harness side) terminal 39 (XC9)
  &
  A84 Control Unit - Engine
  Wiring harness connector (wiring harness side) terminal 62 (XC9)
• Measure resistance between the following terminals:
  B65 Sensor - Knock Control
  Wiring harness connector (wiring harness side) terminal 1
  &
  B65 Sensor - Knock Control
  Wiring harness connector (wiring harness side) terminal 2

less than 5 Ohm

Result

Cause Of Fault

• Defective component:
  B65 Sensor - Knock Control
  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.

• Circuit interruption between:
  A84 Control Unit - Engine
  Wiring harness connector (wiring harness side) terminal 39 (XC9)
  &
  B65 Sensor - Knock Control
  Wiring harness connector (wiring harness side) terminal 1
  or
  A84 Control Unit - Engine
  Wiring harness connector (wiring harness side) terminal 62 (XC9)
  &
  B65 Sensor - Knock Control
  Wiring harness connector (wiring harness side) terminal 2

• Short circuit in wiring harness between:
  B65 Sensor - Knock Control
  Wiring harness connector (wiring harness side) terminal 1
  &
  B65 Sensor - Knock Control
  Wiring harness connector (wiring harness side) terminal 2
  &
  Concerned terminals of all wiring harness connectors, which are connected with the corresponding lead.

• Short circuit to ground between:
  A84 Control Unit - Engine
  Wiring harness connector (wiring harness side) terminal 39 (XC9)
  &
  B65 Sensor - Knock Control
  Wiring harness connector (wiring harness side) terminal 1

• Short circuit to voltage between:
  A84 Control Unit - Engine
  Wiring harness connector (wiring harness side) terminal 39 (XC9)
  &
  B65 Sensor - Knock Control
  Wiring harness connector (wiring harness side) terminal 1
  &
  A84 Control Unit - Engine
  Wiring harness connector (wiring harness side) terminal 62 (XC9)
  &
  B65 Sensor - Knock Control
  Wiring harness connector (wiring harness side) terminal 2

• Defective component:
  Shielding of signal leads