Jetta Wagon L4-1.9L DSL Turbo (ALH) (2003)
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Connect multimeter using jumper wire from VAG test kit between terminal 1 and engine Ground (GND).
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Switch ignition ON.
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Specification: at least 11.5 V
If the specification was not obtained:
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Switch ignition off.
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Remove windshield wiper arms and plenum cover.
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Connect VAG 1598/22 Test Box to harness connector of control module.
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Check wiring for short circuit between Test Box sockets.