A6 V6-3.0L (AVK) (2004)
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Disconnect electrical harness connector -2- from Engine Speed (RPM) sensor.
Checking internal resistance
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Connect multimeter between terminal 2 and 3 for resistance measurement.
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Specified value: 730 ...1000 Ohms
NOTE: Resistance value of the engine speed (RPM) sensor is based on a temperature of 20 degree C. Resistance increases as temperature increases.
If specified value is not obtained:
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Replace Engine Speed (RPM) sensor, -item 23-.
If specified value is obtained:
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Connect multimeter to terminals 2 and 1 (shielding) and to terminals 3 and 1 (shielding) for resistance measurement.
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Specified value: each Infinity Ohms (no continuity)
If specified value is not obtained:
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Replace Engine Speed (RPM) sensor, -item 23-.
If specified value is obtained:
Checking wire connections
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Connect test box to wiring harness of Engine Control Module (ECM); ECM is not connected. 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
Testing