Passat Syncro Wagon V6-2.8L (ATQ) (2000)
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, item 25 .
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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 set
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Wiring diagram
Test requirements
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Knock sensor securing 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-
B - Knock Sensor (KS) 2 -G66-
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 driving direction, right
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Cylinder bank 2 = in driving direction, left
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Measure resistance between terminals 1 + 2, 1 + 3, and 2 + 3 at connectors to knock sensors.
Specified value: Infinity Ohms
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Connect test box to control module wiring harness, connect test box for wiring test. See: Powertrain Management/Computers and Control
Systems/Testing and Inspection/Reading and Clearing Diagnostic Trouble Codes/Scan Tool Connecting/With Generic Scan Tool/Test Box,
Connecting For Wiring Test