Eurovan MV V6-2.8L (AXK) (2002)
Knock Sensor: Testing and Inspection
Knock Sensors, Checking
NOTE:
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For the Knock Sensors to function properly, it is important for tightening torque to be exactly 20 Nm.
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Use only gold-plated terminals when servicing terminals in harness connector of knock sensors.
Special tools and equipment
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VAG1551 scan tool (or VAG1552 mobile scan tool) with VAG1551/3B cable
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VAG1598/31 test box
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VAG1526 Multimeter (Fluke 83 or equivalent) or VAG1715 multimeter
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VAG1594 connector test kit
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Wiring diagram
Test requirement
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On Board Diagnostic (OBD) must have recognized a malfunction at one or both of the Knock Sensors (KS).
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Coolant temperature must be at least 85 °C, See display group 28, display field 3
Checking function
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Connect VAG1551 scan tool (VAG1552). Start engine and select the Engine Control Module (ECM) using address word Disconnecting scan tool
and selecting ECM) Refer to " Scan Tool Testing/Scan Tool Connecting and Initial Checks " See: Testing and Inspection
Indicated on display:
Rapid data transfer
HELP
Select function XX
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Press buttons -0- and -8- to select "Read measuring value block" function 08. Press -Q- button to confirm input.
Indicated on display:
Read measuring value block
Enter display group number XXX
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Press buttons -0-, -2- and -8- to select "Display group number 28". Press -Q- button to confirm input.
Indicated on display: (1 to 4 = display fields)
Read measuring value block 28
->
1
2
3
4
NOTE: The test of the knock sensors must be performed during a road test since the knock sensor diagnostic is not active until above an engine speed
of 2000 RPM and an engine load of more than 40%.
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Perform a road test and (have a 2nd person) observe the specified value for knock control on the display (display field 4).
Observe the safety precautions that apply to road tests