Audi Workshop Service and Repair Manuals

Fitting position of valve 1 for camshaft timing control -N205 .

• ‒ Switch the ignition on.
• ‒ Start final control diagnosis and actuate camshaft timing control .

Upon actuation of camshaft timing control, the valve should give a clearly audible click.

If the valve does not click, then switch the ignition off.

• ‒ Pull the connector off solenoid valve -N205.

• ‒ → Measure resistance between contacts on valve using hand held multimeter V.A.G 1526.

Specification: 12 ... 16 ω.

• ‒ If the value is not as specified, fit a new valve.

Check power supply to valve for camshaft timing control -N205

• ‒ Pull the connector off solenoid valve -N205.
• ‒ → Connect diode test lamp V.A.G 1527 between engine earth and contact 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 light up.

If the diode test lamp does not light up, carry out the following tests:

• ‒ Check the fuse for the valve of the camshaft timing control.
• ‒ Check the wiring from contact 1 of the camshaft timing control to fuse for open circuit.

=> "Current Flow Diagrams, Electrical Fault Finding and Fitting Locations" binder

• ‒ Test fuel pump relay and activation
  => Page 24-29.

Checking actuation of camshaft timing control

• ‒ → Connect diode test lamp V.A.G 1527 between contacts 1 (positive) and 2 on connector from valve using cables from adapter set V.A.G 1594.
• ‒ Start final control diagnosis and actuate camshaft timing control => Page 01-44.

The diode test lamp should flash on and off upon actuation of camshaft adjustment.

• ‒ If the diode test lamp does not flash or lights up continuously, connect test box V.A.G 1598/22 to wiring harness for engine control unit => Page 24-6.

• ‒ → If the diode test lamp lights up continuously, check the line connection between contact 2 of the connector to contact 55 of the test box for short-circuit to earth.

=> "Current Flow Diagrams, Electrical Fault Finding and Fitting Locations" binder

• ‒ If the diode test lamp does not flash, check the line connection between contact 2 of the connector to contact 55 of the test box for open-circuit or short-circuit to positive.

=> "Current Flow Diagrams, Electrical Fault Finding and Fitting Locations" binder

• ‒ Rectify any open/short circuit as necessary.
• ‒ If no open circuits or short circuits are found, fit a new engine control unit .
• ‒ If none of the tests already performed indicate any fault, then renew the mechanical camshaft adjuster.

=> 4-cylinder Engine, Mechanics; Repair Group 15; Cylinder head, valve gear; Remove and install camshafts and camshaft adjustment