TT Roadster L4-1.8L Turbo (AWP) (2003)
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Unplug connector for Engine speed sensor -1 - (color coding: grey connector).
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Connect multimeter (resistance measurement range) between contacts 2 and 3.
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Specification: 730 to 1000 ohms
NOTE: The resistance value for the Engine speed sensor is based on a temperature of 20 degree C. As the temperature rises, the resistance value
increases.
If the specification is not attained:
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Fit a new Engine speed sensor. If the specification is obtained:
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Connect multimeter (resistance test range) to contacts 2 and 1 (screening) and to contacts 3 and 1 (screening).
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Specification: Infinity ohms (no continuity)
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If the specification is not attained:
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Install a new Engine speed sensor.
If the specification is obtained:
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Connect test box VAG 1598/31 to wiring harness for engine control module. Do not connect to the engine control module itself. See: Powertrain
Management/Computers and Control Systems/Testing and Inspection/Scan Tool Testing and Procedures/Scan Tool Testing/With Manufacturer's
Scan Tool/Scan Tool Connecting and Initial Checks/Wiring and Component Testing Using VAG1598/31 Test Box