Skoda Workshop Service and Repair Manuals > Octavia Mk1 > Drive unit | 1.9 ltr./50 kW (TDI) Engine, Fuel Injection and Glow Plug System | Ignition system, glow plug system | Testing preheating system

Test glow period warning lamp

Special tools and workshop equipment required

t	Vehicle system tester -V.A.G 1552- with cable -V.A.G 1551/3, 3A, 3B oder 3C-

t	Test box -V.A.G 1598/22- or -V.A.G 1598/31-

t	Measuring tool set (e.g. -V.A.G 1594A-)

Test conditions

l	Fuse no. 29 o.k.

–	Perform an actuator diagnosis and actuate glow period warning light → Chapter.

Readout on display:

The warning light must flash.

If the warning light does not flash:

–	Connect test box to wiring loom to engine control unit → Chapter.

For the test box -V.A.G 1598/22-

–	Using an adapter cable from a measuring tool set interconnect the bush 1 and the bush 41 of the test box.

For the test box -V.A.G 1598/31 -

Using an adapter cable from a measuring tool set interconnect the bush 1 and the bush 42 of the test box.

For all vehicles

–	Switch on ignition.

The warning light must light up.

If the warning light does not light up:

–	If necessary eliminate wire interruption or short-circuit → Current flow diagrams and Fitting locations.

Now the warning light lights up, but not during the actuator diagnosis:

–	Replacing engine control unit -J248- → Chapter.

Actuator diagnosis                        ->

Glow period warning light -K29

Skoda Workshop Service and Repair Manuals