Passat L4-1.8L Turbo (AWM) (2004)
Knock Sensor: Testing and Inspection
With Generic Scan Tool
Knock Sensors, Checking
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
-
V.A.G 1526 portable multimeter or V.A.G 1715 multimeter
-
V.A.G 1594 connector test kit
-
Wiring diagram
Test requirements
-
Knock sensor securing bolt tightened to 20 Nm.
-
Ignition switched off.
Checking resistances and wires
I
Engine code AEB, ATW
II Engine code AUG, AWM
-
Disconnect 3-pin harness connector to Knock Sensor (KS) 1 -G61- (green, -1-) and/or 3-pin harness connector to Knock Sensor (KS) 2 -G66-
(blue, -2-).
-
Measure resistance between terminals 1 + 2, 1 + 3, and 2 + 3 at connectors to knock sensors.
Specified value: Infinite ohms
If specified value is not obtained:
-
Replace the respective knock sensor:
If specified value is obtained:
-
Connect test box to control module wiring harness. connect test box for wiring test.
Vehicles with engine code AEB