Passat V6-2.8L (ATQ) (2004)
Variable Valve Timing Actuator: Testing and Inspection
With Generic Scan Tool
Camshaft Adjustment Valves, Checking
Function
The camshaft adjustment is load- and RPM dependent. The electrical valves for camshaft adjustment switch oil pressure onto camshaft adjusters
(mechanical adjustment mechanisms), which then adjust the camshafts.
Recommended special tools and equipment
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V.A.G 1526 multimeter or V.A.G 1715 multimeter
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V.A.G 1594 connector test kit
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Wiring diagram
Test requirements
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The respective fuses of Valve 1 for camshaft adjustment -N205- and Valve 2 for camshaft adjustment -N208- must be OK:
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Fuel Pump (FP) Relay -J17- must be OK, check:
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Battery voltage must be at least 11.5 volts.
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All electrical consumers such as, lights and rear window defroster must be switched off.
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Parking brake must be engaged or else daylight driving lights will be switched on.
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If vehicle is equipped with an A/C system, it must be switched off.
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Ground (GND) connections between engine and chassis must be OK.
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Ignition switched off.
Test sequence
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Disconnect 2-pin harness connector -1- to the respective valve for camshaft adjustment -2
NOTE: Before disconnecting harness connectors, mark allocation to component.