Beetle L4-1781cc 1.8L Turbo (APH) (1999)
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Pull the 4 pin connector off Engine Coolant Temperature (ECT) sensor (G62) with coolant temperature gauge sender (G2) - arrow-.
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Check wire for open circuit between test box and 4-pin connector using wiring diagram.
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Contact 1 + Socket 108
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Contact 3 + Socket 93
Wire resistance: max. 1.5 Ohms
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Check wire for short circuit between test box and 4-pin connector contact 1 to wire contact 3 and to vehicle Ground using wiring diagram.
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Contact 3 + socket 108
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Contact 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: