Touareg V8-4.2L (BHX) (2004)
Specified value: 480 to 1000 ohms
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Check sensor for short circuit between terminals 1+2 as well as 1+3.
Specified value: infinite ohms
If specified values are obtained:
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Check wires according to wiring diagram.
If specified values are not obtained:
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Replace Engine Speed (RPM) Sensor (G28).
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Erase DTC memory of Engine Control Module (ECM) , Diagnostic mode 4: Reset/erase diagnostic data.
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Generate readiness code.
Checking wiring
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Connect test box to control module wiring harness , connect test box for wiring test.
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Check wires between test box and 3-pin connector for open circuit according to wiring diagram.
Terminal 1 + socket 108
Terminal 2 + socket90
Terminal 3 + socket 82
Wire resistance: max. 1.5 ohms
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Also check wires for short circuit to each other.
Specified value: infinite ohms
If no malfunctions are found in wires:
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Remove sensor and check sensor wheel for secure fit, damage, and run-out.
‹› There is a larger-sized gap on the sensor wheel. This gap is the reference mark and does not mean that the sensor wheel is damaged.
If nothing seems to be wrong with the sensor wheel:
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Replace Motronic Engine Control Module (ECM) (J220).