A6 Quattro Sedan V6-3.0L (AVK) (2002)
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Connect multimeter between terminals 2 and 3 to measure resistance.
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Specified value: 730 to 1000 Ohms
NOTE: The resistance value of the engine speed sensor is associated with a temperature of 20 degree C. The resistance increases if the temperature
increases.
If specified value is not obtained:
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Replace engine speed sensor.
If specified value is obtained:
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Connect multimeter between terminals 2 and 1 (screen) and 3 and 1 (screen) to measure resistance.
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Specified value: each case Infinity Ohms (no continuity)
If specified value is not obtained:
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Replace engine speed sensor.
If specified value is obtained:
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Connect test box VAG 1598/31 to wiring harness for engine control module; do not connect engine control module. See: Computers and Control
Systems/Testing and Inspection/Scan Tool Testing and Procedures/Scan Tool Testing/Scan Tool Connecting and Initial Checks/Wiring and
Component Testing Using VAG1598/31 Test Box
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Check for open circuit and short to positive or ground in following wiring connections:
Connector
Test box VAG 1598/31
terminal
Socket
1 (screening)
108
2 (ground)
90
3 (signal)
82
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Repair any open/short circuit as necessary.
If no wiring malfunction is detected:
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Replace engine control module.