Checking solenoid valves for camshaft timing control -N205 and -N208 — AUDI
Checking solenoid valves for camshaft timing control -N205 and -N208 on Audi: factory workshop procedure for engines AKC, ANK, AQF, AQG.
Workshop procedure for AUDI — the factory write-up, straight from real workshop data.
📐 20 workshop diagrams for AKC
Real factory drawings for this job — timing marks, bolt locations and routing. Locked in the free view.
📋 Procedure
AQJ ASG ANK
Switch the ignition on.
Perform final control diagnosis and actuate camshaft timing control => Page
01-74
.
Final control diagnosis
⇒
Camshaft timing control 1
Indicated on display:
Upon actuation of camshaft timing control, both solenoid valves should give a clearly audible click.
If specified value is not attained, perform the following tests:
Checking camshaft timing control solenoid valves electrically
Disconnect connector from relevant solenoid valve for camshaft timing control.
Measure resistance between contacts on solenoid valve using hand-held multimeter V.A.G 1526.
Specified value: 10 ... 18 ohm.
If specification is not attained:
Replace relevant solenoid valve for camshaft timing control.
Testing voltage supply of solenoid valves for camshaft timing control
Disconnect connector from relevant solenoid valve.
Connect diode test lamp V.A.G 1527 between engine earth and socket 1 (positive) on connector using cables from adapter set V.A.G 1594.
Operate the starter for a few seconds. Engine may start.
The diode test lamp should illuminate.
If the diode test lamp does not illuminate, carry out the following tests:
Check fuse for solenoid valves for camshaft timing control.
=> Current Flow Diagrams, Electrical Fault-finding and Fitting Locations binder
If the fuse is OK:
Check the wiring from socket 1 via the fuse to the fuel pump relay for continuity.
=> Current Flow Diagrams, Electrical Fault-finding and Fitting Locations binder
Checking actuation of camshaft timing control valves
Disconnect connector from relevant solenoid valve.
Connect diode test lamp V.A.G 1527 between sockets 1 (positive) and 2 on connector valve using cables from adapter set V.A.G 1594.
Perform final control diagnosis and actuate camshaft timing control => Page
01-74
.
Final control diagnosis
⇒
Camshaft timing control 1
Indicated on display:
The diode test lamp should flash on and off upon actuation of camshaft timing control.
If the diode test lamp is continuously lit:
Check wiring connections from socket 2 of the relevant connector for the solenoid valve for camshaft timing control for earth short.
If the diode test lamp does not flash:
Check wiring => Page
28-37
.
Checking wiring
Connect test box V.A.G 1598/31 to wiring harness for engine control unit; do not connect the engine control unit => Page
24-12
.
Check wiring connection of the relevant connector for solenoid valve for camshaft timing control for open circuits as well as short to positive.
Camshaft timing control solenoid valve 1 -N205
2-pin connector on wiring harness, contact. · Test box V.A.G 1598/31, socket
2 · 115
Wire resistance: max. 1.5 Ohm
Rectify any open/short circuit as necessary.
=> Current Flow Diagrams, Electrical Fault-finding and Fitting Locations binder
Camshaft timing control solenoid valve 2 -N208
2-pin connector on wiring harness, contact. · Test box V.A.G 1598/31, socket
2 · 120
Wire resistance: max. 1.5 Ohm
Rectify any open/short circuit as necessary.
=> Current Flow Diagrams, Electrical Fault-finding and Fitting Locations binder
If no short circuit or open circuit is found, replace engine control unit =>Page
24-16
.
If none of the tests already performed indicate any fault, then replace the mechanical camshaft adjuster.
=> 8-cylinder Engine, Mechanical Components; Repair group 15; Cylinder head, valve gear; Removing and installing camshafts and camshaft timing control
8-cylinder Engine, Mechanical Components
Cylinder head, valve gear
Removing and installing camshafts and camshaft timing control
TorqFix answers live for your specific car — tell it the engine code and it serves the matching sequence, torque figures and wiring for that exact variant.
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Who makes these pages, and how
TorqFix was built by a mechanic — after a 2,700 km drive with five roadside repairs that no diagnostic tool could explain.
The figures on this page come from manufacturer workshop documentation and are shown as they are. The page is assembled automatically from that data — it is not written by an AI. The AI works in the chat, where it answers for your specific car. It writes nothing here.
Variants of the same model differ. Cross-check torque against the factory manual for your engine before final tightening.
Seen a figure that does not match your manual? Write to us — we correct it and note when. support@torqfix.com
The story behind TorqFix →Workshop data on this page last updated 20 Sep 2026.