A8 Quattro Sedan V8-4.2L (BGK) (2006)
Engine Speed Sensor: Testing and Inspection
Engine Speed Sensor, Checking
Test Prerequisites
‹› Correct installation and secure seating of Engine Speed (RPM) Sensor.
‹› No shavings or damage at Engine Speed (RPM) Sensor or sensor wheel.
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Disconnect gray harness connector of Engine Speed (RPM) Sensor (G28) (connector strip on underside of transmission, position 1).
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Use adapter cables from connector test kit (VAG1594) to connect portable multimeter (VAG1526) to terminals 2 and 3 for resistance
measurement.
Specified value: approx. 450 to 1200 ohms
If specified value is not obtained, replace Engine Speed (RPM) Sensor.
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If specified value is obtained, connect portable multimeter (VAG1526) to terminal 1 and 2 as well as terminal 1 and 3.
Specified value: infinite ohms respectively (no continuity).
If specified value is not obtained, replace Engine Speed (RPM) Sensor.
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Read readiness code => [ Readiness Code, Reading ] See: Testing and Inspection/Monitors, Trips, Drive Cycles and Readiness Codes. If DTC
memory was erased, readiness code must be generated again => [ Readiness Code, Generating ] See: Testing and Inspection/Monitors, Trips,
Drive Cycles and Readiness Codes