volkswagen Workshop Repair Guides

Volkswagen Workshop Service and Repair Manuals

With Manufacturer's Scan Tool|Page 2859 > < With Manufacturer's Scan Tool|Page 2857
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Knock Sensor: Testing and Inspection
With Generic Scan Tool

Check Knock Sensors

NOTE:

Contact surfaces between knock sensor and cylinder block must be free of corrosion, dirt and grease.
For the Knock Sensors to function properly, it is important for tightening torque to be exactly 20 Nm.
Use only gold-plated terminals when servicing terminals in harness connector of knock sensors.

Recommended special tools and equipment

-

VAG1526 multimeter or VAG1715 multimeter

-

VAG1594 connector test kit

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Wiring diagram

Test requirements

-

Knock sensor securing bolt tightened to 20 Nm.

-

Ignition switched off.

Checking resistances and wires (Vehicles with engine code AEG)

-

Disconnect 2-pin connectors from knock sensors.
1 - Knock Sensor (KS) 1 -G61-
2 - Knock Sensor (KS) 2 -G66-

NOTE:  Before disconnecting harness connectors, mark allocation to component.

-

Measure resistance between terminals 1 + 2 at connectors to knock sensors. Specified value: Infinite Ohms

-

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/With Generic Scan Tool/Test Box, Connecting For Wiring
Test 

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