Passat V6-2.8L (ATQ) (2004)
Knock Sensor: Testing and Inspection
With Generic Scan Tool
Knock Sensors, Checking
NOTE:
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To remove and install Knock Sensors, intake manifold must be removed.
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Contact surfaces between knock sensor and cylinder block must be free of corrosion, dirt and grease.
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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.
Recommended special tools and equipment
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V.A.G 1526 multimeter or V.A.G 1715 multimeter
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V.A.G 1594 connector test kit
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Wiring diagram
Test requirements
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Knock sensor mounting bolt tightened to 20 Nm.
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Ignition switched off.
Checking resistances and wires
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Disconnect 3-pin harness connector to knock sensors:
A. Knock Sensor (KS) 1 -G61-, cylinder bank 1
B. Knock Sensor (KS) 2 -G66-, cylinder bank 1
NOTE:
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To reach the harness connector of Knock Sensor (KS) 2 -G66-, remove coolant reservoir securing screws and tilt coolant reservoir to the side. The
coolant hoses remain connected.
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Cylinder bank 1 = in direction of travel, right.
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Cylinder bank 2 = in direction of travel, left.
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Measure resistance between terminals 1 + 2,1 + 3, and 2 + 3 at connectors to knock sensors.
Specified value: Infinite ohms
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Connect test box to control module wiring harness. connect test box for wiring test. See: Computers and Control Systems/Testing and
Inspection/Reading and Clearing Diagnostic Trouble Codes/Scan Tool Connecting/Test Box, Connecting For Wiring Test