Skoda OCTAVIA 2004 Workshop Manual page 191

OCTAVIA
Edition 03.98
S00.5111.52.20
Glow Plug System
Testing glow plug system
Testing operation
Special tools, testers and aids required
♦ Hand-held multimeter (e.g. V.A.G 1526)
♦ Current flow diagram
Test conditions
l Battery voltage at least 11.5 V
l Diesel direct injection system control unit
(J248) o.k.
l Strip fuse for glow plugs (S 132) o.k.
Test procedure
- Switch off the ignition.
K - Unplug connector -1- at the coolant tempera-
ture sender (G62) -2-.
Note:
When the connector is unplugged from the
sender, the „cold" engine state is simulated and
appropriate glow plug heating operation is car-
ried out when the ignition is switched on.
- Unplug the glow plug connectors from the
glow plugs.
- Connect the multimeter for voltage measure-
ment to a glow plug connector and to engine
earth.
- Switch on the ignition.
approx. battery voltage
should be displayed for about 20 seconds.
If no voltage is present:
- Rectify any open circuit in the wiring or short
circuit.
⇒ Current Flow Diagrams, Electrical Fault
Finding and Fitting Locations binder
During the simulated glow plug heating opera-
tion, the glow period warning lamp (K29) should
come on.
28
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