A8L V8-4.2L (BFM) (2004)
Variable Valve Timing Actuator: Testing and Inspection
Valve -1- For Camshaft Adjustment -N205- And Valve -2- For Camshaft Adjustment -N208-, Checking
Solenoid valve for camshaft adjustment, electrical testing
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Disconnect connector at respective solenoid valve for camshaft adjustment.
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Perform a resistance measurement between terminals on solenoid valve using hand multimeter V.A.G 1526.
Specified value: 10 to 18 Ohms.
If specified value is not obtained.
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Replace the respective Valve -1- for camshaft adjustment -N205-/Valve -2- for camshaft adjustment -N208-.
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Read readiness code. If DTC memory was erased, readiness code must be generated again.
If the specified value is obtained, check voltage supply
Checking voltage supply of solenoid valves for camshaft adjustment
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Disconnect connector at respective solenoid valve.
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Connect V.A.G 1527 voltage tester to terminal 1 (B+) of connector and to engine Ground (GND) using cables from V.A.G 1594 connector test
kit.
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Operate starter for a few seconds. Engine may also start up during this.
LED must light up.
If diode test lamp does not light up, the following tests must be performed:
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Check fuse for solenoid valves for camshaft adjustment.
If fuse is OK.