Skoda Workshop Service and Repair Manuals > Octavia Mk1 > Drive unit | 1.8 ltr./92 kW Engine - Fuel Injection and Ignition System Motronic | Ignition system, glow plug system | Repairing the ignition system

Check camshaft adjustment valve 1

Special tools and workshop equipment required

t	Vehicle system tester -V.A.G 1552- with cable -V.A.G 1551/3-

t	Test box -V.A.G 1598/22-

t	Hand-held multimeter e.g. -V.A.G 1526 A- or multimeter -V.A.G 1715-

t	Measuring tool set - V.A.G 1594 A-

Fitting location of valve.

Test sequence

–	Switch on ignition.

–	Initiate an actuator diagnosis (function 03) and select the camshaft adjustment → Chapter.

Readout on display:

The valve must click clearly audible when actuating the camshaft adjustment.

If the valve does not click, switch off ignition.

Actuator diagnosis                    ->

Camshaft adjustment 1

–	Disconnect plug from the exhaust gas recirculation valve 1 - N205-.

–	Perform resistance measurement between the contacts of the valve with -V.A.G 1526 A-.

Specified value: 10 to 18 Ω

–	If the nominal value is not reached, replace the camshaft adjustment valve 1.

Check voltage supply of the camshaft adjustment valve 1 -N205-

–	Disconnect plug at the camshaft adjustment valve 1 -N205 -.

–	Connect voltage tester -V.A.G 1527- with cable from measuring tool set -V.A.G 1594 A- to contact 1 of plug and to engine mass.

–	Switch on the starter motor for a short time. While doing so, the engine can also start.

The voltage tester must light up.

If the voltage tester does not occur, perform the following tests:

–	Check fuse for the camshaft adjustment valve 1.

–	Check the cable of contact 1 of the fuse for camshaft adjustment plug for interruption → Current Flow Diagrams, Electrical Fault Finding, Fitting Locations.

–	Test fuel pump relay and control → Chapter.

Test control of the camshaft adjustment

–	Connect voltage tester -V.A.G 1527- with cable from measuring tool set -V.A.G 1594 A- to contact 1 (positive) and contact 2 of the valve plug.

–	Initiate an actuator diagnosis and select the camshaft adjustment → Chapter.

Readout on display:

The voltage tester must flash for the actuation of the camshaft adjustment.

Actuator diagnosis                    ->

Camshaft adjustment 1

–	If the voltage tester does not light up or lights up continuously, connect test box -V.A.G. 1598/22- at wiring loom to engine control unit → Chapter.

–	If the voltage tester lights up continuously, check the wiring between contact 2 of the plug to contact 55 of the test box for short circuit to earth → Current Flow Diagrams, Electrical Fault Finding, Fitting Locations.

–	If the voltage tester does not flash, check the wiring between contact 2 of the plug to contact 55 of the test box for short circuit to earth → Current Flow Diagrams, Electrical Fault Finding, Fitting Locations.

–	If necessary eliminate earth and/or line interruption.

–	If there is neither a line interruption nor a short-circuit; replace engine control unit → Chapter.

–	If the wiring is O.K., replace the mechanical camshaft adjuster → 1.8-ltr/92kW Engine, Mechanics; Rep. Gr.15.

Skoda Workshop Service and Repair Manuals