Beetle L4-2.0L (AEG) (2000)
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Connect VAG 1598/22 Test Box to ECM wiring harness.
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Disconnect 4-pin harness connector -1- from ECT sensor -2-.
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Check wire for open circuit between Test Box socket 67 and 4-pin harness connector terminal 1 using Wiring diagram.
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Wire resistance: 1.5 Ohms maximum
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Check wire for open circuit between Test Box socket 53 and 4-pin harness connector terminal 3 using Wiring diagram.
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Wire resistance: 1.5 Ohms maximum
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Check for short between Test Box and 4-pin harness connector terminals 1 and 3 to vehicle Ground, using Wiring diagram.
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Terminal 3 + socket 67
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Terminal 3 + vehicle Ground
Specification: Infinity Ohms
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Also check both wires for short to Battery +.
Specification: Infinity Ohms
If wiring OK: