A6 Quattro Sedan V8-4.2L (ART) (2000)
Engine Speed Sensor: Testing and Inspection
Engine Speed (RPM) Sensor -G28-, Checking
Engine Speed (RPM) Sensor -G28, checking
NOTE: The engine speed sensor is a combined speed sensor and reference mark sensor.
Checking engine speed sensor
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Before carrying out the test, make sure that sensor is correctly installed and firmly seated.
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Check sensor and sensor wheel for damage and make sure they are not obstructed by metal particles.
Thickness of spacer between sensor and transmission should be 4.5 mm.
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Disconnect harness connector for engine speed sensor (grey connector).
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Connect VAG 1526 multimeter (resistance test range) to terminals 2 and 3 on connector for engine speed sensor using test lead from VAG 1594
connector test kit.
Specification: approx. 450 to 1000 ohm
NOTE:
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The resistance value for the engine speed sensor is based on a temperature of 20 ° C.
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The resistance increases as the temperature rises.
If the specification is not attained:
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Replace Engine Speed (RPM) sensor.
If the specification is attained:
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Connect multimeter VAG 1526 (resistance test range) between terminals 2 and 1 (Ground) and between terminals 3 and 1 (Ground).