Testing solenoid valves for camshaft adjustment -N205. — AUDI

ARH
Switch ignition on.
Perform final control diagnosis and activate camshaft timing control => Page
01-35
.

Final control diagnosis
⇒
Camshaft timing control 1
Indicated on display:

When the camshaft timing control is activated, the solenoid valve should click audibly.

If this result is not obtained, carry out the following tests:

Electrical test of solenoid valve for camshaft adjustment

Unplug connector from solenoid valve for camshaft adjustment.
Measure resistance between the valve contacts using hand-held multimeter V.A.G 1526.

Specification: 10 ... 18 ω

If the reading does not match the specification:

Renew solenoid valve for camshaft adjustment.

Testing voltage supply to camshaft adjustment valve

Unplug connector from solenoid valve.
Connect diode test lamp V.A.G 1527 between engine earth and socket 1 (positive) of the connector using test leads from auxiliary test set V.A.G 1594.
Operate the starter for a few seconds. The engine can be allowed to start.

The diode test lamp should light up.

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

Test fuse for camshaft adjustment valve.

=> Current flow diagrams, Electrical fault finding and Fitting locations binder

If the fuse is okay:

Test for continuity in wiring from socket 1 on connector for camshaft adjustment valve via fuse to fuel pump relay

=> Current flow diagrams, Electrical fault finding and Fitting locations binder

Testing activation of camshaft adjustment valve

Unplug connector from solenoid valve.
Connect diode test lamp V.A.G 1527 between sockets 1 (positive) and 2 of the valve connector using test leads from auxiliary cable set V.A.G 1594.
Perform final control diagnosis and activate camshaft timing control => Page
01-35
.

Final control diagnosis
⇒
Camshaft timing control 1
Indicated on display:

When the camshaft timing control is activated the diode test lamp should start flashing.

If the diode test lamp does not flash or lights up continuously:

Connect test box V.A.G 1598/31 to wiring harness for engine control unit. Do not connect to the engine control unit itself.
=> Page
24-10
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If the diode test lamp lights up continuously:

Test for short to earth in wiring from socket 2 on connector for camshaft adjustment valve.

If the diode test lamp does not flash:

Test for continuity or short to positive in wiring between socket 2 on connector for camshaft adjustment valve and socket 115 on test box.

Resistance in wiring: max. 1.5 ω

=> Current flow diagrams, Electrical fault finding and Fitting locations binder

Rectify any open circuits or short circuits.

If no open circuits or short circuits are found, fit a new engine control unit => Page
24-12
.

If no faults have been found in any of the tests so far, renew the mechanical camshaft adjuster.

=> 4-Cylinder engine, Mechanics; Repair group 15; Cylinder head, valve gear; Removing and installing camshafts and camshaft adjusters
4-Cylinder engine, Mechanics
Cylinder head, valve gear
Removing and installing camshafts and camshaft adjusters