TT Quattro Coupe V6-3.2L (BHE) (2005)
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Using a multimeter, check the Engine Speed (RPM) Sensor G28 terminals 2 to 3 for resistance.
Specified value: 0.7 to 1000 kOhm
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Check the Engine Speed (RPM) Sensor G28 terminals 1 to 2 and 1 to 3 for short circuits.
Specified value: (infinity)
If any of the specified values are not obtained:
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Replace the Engine Speed (RPM) Sensor G28.
If the specified values are obtained:
Checking wiring
If the manufacturers test box is being used. Perform the following step.
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Install the Test box VAG1598/31.
If the manufacturers test box is not being used. Perform the following step.
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Remove the Motronic Engine Control Module (ECM) J220.
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Using a Multimeter, check the Engine Speed (RPM) Sensor G28 electrical harness connector terminals to the Motronic Engine Control Module
(ECM) J220 electrical harness connector terminals for resistance.
Engine Speed (RPM) Sensor
Motronic Engine Control
G28 electrical harness
Module (ECM) J220 electrical
connector terminals
connector terminals or test box sockets
1
108
2
90
3
82
Specified value: 1.5 Ohms Max.
If the specification was not obtained:
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Check the wiring for an open circuit, short circuit to each other, Battery (+), and Ground (GND).
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Check the electrical harness connector for damage, corrosion, loose or broken terminals.
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If necessary, repair the faulty wiring connection.
If no malfunction is detected in the wiring:
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Remove the Engine Speed (RPM) Sensor G28 and check the sensor wheel for proper seating, damage and run-out.