Skoda OCTAVIA MK1 Service Manual page 131

t The ignition and injection system is locked during the final control diagnosis.
With the actuator diagnosis the following parts are activated in the sequence indicated:
1.Fuel pump relay -J17-
2.Activated charcoal filter system solenoid valve 1 -N80-
3.Exhaust gas return valve -N18-, (two-way valve)
4.Valve for variable intake manifold changeover -N156-
1) At present not in use
Special tools, test equipment as well as aids required
t Vehicle system tester -V.A.G 1552 - with cable -V.A.G 1551/3-
Procedure
Connect vehicle system tester -V.A.G 1552- and select address word 01 "Engine
–
electronics". The ignition must be switched on during this operation.
Readout on display:
Operate the vehicle system tester by referring to the
–
read-out on the display.
– Enter 03 for the function "Actuator diagnosis".
Readout on display:
Activate fuel pump relay - J17-:
– Confirm the entry with the key Q.
Readout on display:
The fuel pump relay is activated for approx. 50°seconds
unless the following actuator is activated earlier by pressing
the → key.
Note
During activation of the fuel pump relay the fuel pump should
also be heard to run at intervals.
If the relay does not activate:
– Test fuel pump relay and control
– Press → key.
Readout on display:
The activated charcoal filter system solenoid valve 1 -N80- is
activated audibly for approx. 50°seconds unless the following
→ Note
Vehicle system test
03 - Actuator diagnosis
→ Chapter.
131
Vehicle system test
HELP
Select function XX
Actuator diagnosis
->
Fuel pump relay J17
Actuator diagnosis
->
Solenoid valve 1 for
activated charcoal filter
system N80
Q