Jetta GLS L4-1.8L Turbo (AWD) (2001)
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Connect contacts of after-run coolant pump (V51) to battery using aux. cables from V.A.G 1594. After-run coolant pump must run.
If the after-run coolant pump does not run:
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Replace after-run coolant pump (V51).
If the after-run coolant pump (V51) runs:
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Switch ignition off and on again.
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Connect VAG 1527B voltage tester to disconnected connector for after-run coolant pump (V51) with auxiliary cable from V.A.G 1594 A LED
must light up.
Note: This check must be performed within minutes after switching ignition off.
If the LED does not light up:
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Locate and repair open circuit using wiring diagram.
