Jetta GLX Wagon V6-2.8L (AFP) (2001)
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Use wiring diagram to check cable between contact 3 of 3-terminal plug and relay plate for broken connections.
Line resistance: 1.5 Ohms maximum
If the LED illuminates (power supply OK):
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Remove windshield wiper arms and cowl:
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Connect VAG 1598/31 test box to control module wiring.
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Use wiring diagram to check cables between test box and 3-terminal plug for any broken connections.
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Contact 1 + cavity 80
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Contact 2 + cavity 25
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Line resistance: 1.5 Ohms maximum
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Also check cables for short circuits between each other.
Specification: Infinity Ohms
If no fault could be detected in the cables and there was voltage between contact 3 + ground:
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Replace leak detection pump (V144), item -8-.
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Read-out readiness code:
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If fault memory has been erased or engine control module was separated from positive voltage supply, readiness code must be regenerated:
Checking resistances
Test sequence
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Remove rear right Fender liner: