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New Beetle L4-2.0L (AZG) (2003)

Sensors and Switches > Sensors and Switches - Cooling System > Engine - Coolant Temperature Sensor/Switch > Coolant Temperature Sensor/Switch (For Computer) > Component Information > Testing and Inspection > With Manufacturer's Scan Tool > Page 867

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Check wire for open circuit between test box and 4-pin connector using wiring diagram.
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Terminal 3 + Socket 93

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Terminal 4 + Socket 108 

Wire resistance: max. 1.5 Ohms

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Check wire for short circuit between test box and 4-pin connector terminal 4 to wire terminal 3 and to vehicle Ground using wiring diagram.
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Terminal 3 + socket 108

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Terminal 3 + vehicle Ground

Specification: Infinity Ohms

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Additionally check both wires for short to battery positive. 
Specification: Infinity Ohms

If no wiring malfunctions are detected:

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Perform resistance measurement on Engine Coolant Temperature (ECT) sensor (G62) terminal C (signal) and D (Ground).

Sensors and Switches > Sensors and Switches - Cooling System > Engine - Coolant Temperature Sensor/Switch > Coolant Temperature Sensor/Switch (For Computer) > Component Information > Testing and Inspection > With Manufacturer's Scan Tool > Page 867

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