Jetta V6-2.8L (AFP) (1999)
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Use the wiring diagram to check the cables between the test box and the connector for any broken connections.
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Contact 1 + cavity 72
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Contact 2+cavity 73
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Contact 3+cavity 36
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Contact 4+jack 35
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Contact 5+jack 33
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Contact 6+jack 34
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Line resistance: max. 1.5 0
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Also check the cables for a short circuit to the battery positive terminal or to ground.
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Also check the cables for short circuits between each other.
If no problems can be found in the cables:
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Replace the throttle position sensor (G79).