1997 SKODA OCTAVIA ignition

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17Lubrication System
Edition 08.96

Testing oil pressure and oil pressure switch
Special tools, testers and aids required
Oil pressure tester (e.g. V.A.G 1342)
Diode test lamp (e.g. V.A.G 1527)
Adapter cable set (e.g. V.A.G 1594)
Current flow diagram
Operation of dynamic oil pressure warning system
Testing warning lamp After ignition on („terminal 15 on“) and engine not running, the oil pressure warning lamp flashes (not on models with Auto Check System).
Warning criteria
Engine not running and oil pressure switch closed.
Coolant temperature greater than 60 °C, engine speed greater than 1500 rpm and oil pressure switch open.
At an engine speed of more than 5000 rpm an active oil warning is not cancelled, irrespective of the position of the oil pressure switch.
If the voltage supply of the control unit is o.k. (terminal 15) and the oil pressure switch is open for longer than 0.5 seconds at engine speeds of more than 1500 rpm, this is stored. If this condition occurs three times during „terminal 15 on“, the warning becomes or remains active even at engine speeds of less than 1300 rpm.
Test conditions
Engine oil level o.k.; inspect page 17-10
Oil pressure warning lamp (K3) should come on when ignition switched on.
The o.k. readout on vehicles with Auto Check System should come on (select symbol)
Engine oil temperature at least 80 °C (radiatorfan should have cut in once)

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Edition 08.96




Removing and installing fuel delivery unit
Pay attention to safety precautions ⇒
page 20-4.
Pay attention to rules for cleanliness ⇒ page
20-4. Special tools, testers and aids required♦ Wrench for union nut MP 1-227
Removing
- If car is fitted with a coded radio set, deter- mine coding, if necessary.
- Switch off ignition (if not already off) and dis- connect earth strap at the battery.
- Unbolt cover (below the rear seat).
- Disconnect feed and return flow pipes from the flange of the fuel delivery unit (press release buttons).
- Release 4-pin connector from the flange at the fuel tank and unplug.
- Use wrench MP 1-227 to unscrew union nut.
- Pull fuel delivery unit and seal out of the
opening of the fuel tank.
Note:
If the delivery unit is still filled with fuel, emptybefore replacing.
Installing Installation is performed in the reverse order; pay attention to the following points:
Notes:
♦When inserting the fuel delivery unit, ensure
that the fuel gauge sender is not bent.
♦Moisten seal of the flange with fuel beforeinstalling.
♦Ensure the fuel hoses are tightly connected.

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Edition 08.96




Removing
- If car is fitted with a coded radio set, pay attention to coding; determine if necessary.
- Switch off ignition (if not already off), and disconnect earth strap at the battery.
- Empty fuel tank with fuel extraction unit (e.g. V.A.G 1433 A).
- Remove rear suspension: ⇒ Running Gear; Repair Group 42; Servicing rear suspension; Removing and installing rear suspension.
- Unbolt cover (below the rear seat).
- Release 4-pin connector from the flange at fuel tank and unplug.
- Open fuel filler flap and lever out tensioning ring in rubber bowl (around filler neck).
- Push rubber bowl through to the inside.
- Remove rear right wheelhouse liner.
- Unscrew fuel filler neck below the wheel- house liner.
- Remove cover below the fuel tank -arrows-
(if fitted).
- Disconnect return flow pipe -2- (blue), feed
pipe -1- (black) and breather pipe -3- (white) at the front right of the fuel tank (press release buttons).
- Place engine/gearbox jack (e.g. V.A.G 1383 A) below the fuel tank to support it.

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Edition 08.96




Testing fuel pump
Special tools, testers and aids required
Hand-held multimeter (e.g. V.A.G 1526)
Wrench for union nut (e.g. MP 1-227)
Adapter cable set (e.g. V.A.G 1594)
Current flow diagram
Test conditions
Holding pressure o.k.; testing:
1.8 ltr./92 kW Engine, Motronic Fuel Injection and Ignition System; Repair Group 24;
Testing fuel pressure regulator and holding pressure
Battery voltage at least 12 V
Fuse 28 o.k.
Fuse filter o.k.
Test procedure
- Switch on ignition. The fuel pump should be heard to operate. (A second mechanic may be required if there is a high level of surrounding noise) If the fuel pump does not run:
- Switch off ignition.
- Connect remote control V.A.G 1348/3A with adapter cable V.A.G 1348/3-2 page 20-8.
- Operate remote control.If the fuel pump runs:
Test fuel pump relay: 1.8 ltr./92 kW Engine, Motronic Fuel Injection and Ignition System; Repair Group 24; Servicing Motronic fuel injection system; testing fuel pump relay and actuation

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Edition 08.96



 
Test procedure
- Switch off ignition.
- Connect remote control V.A.G 1348/3A with
adapter cable V.A.G 1348/3-2 ⇒ page 20-8.
- Remove cap from the fuel filler neck.
Important! Fuel system is pressurised! Place cleaning ragsaround the connection point before opening the
system. Then, release pressure by carefullyloosening the connection point.
- Disconnect fuel return flow pipe -2- (press
release buttons).
- Connect auxiliary hose to adapter V.A.G 1318/17 and fit onto the fuel return flow pipe of the engine and hold in a measuring vessel.
- Operate remote control for 15 seconds (press button and hold).
- Compare quantity of fuel supplied with spe-
cification.
*)Minimum delivery cm3/15 s
**)Voltage at fuel pump when engine switched
off and pump running (about 2 V less than battery voltage).

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20Fuel Supply System




Edition 08.96

1 - Solenoid valve 1 (N80)
Testing operation and actuation:
1.8 ltr./92 kW Engine, Motronic Fuel Injection and Ignition System; Repair Group 24;
Testing tank breather; Testing solenoid valve 1 for activated charcoal filter
2 - Connector
3 - Vent pipe From gravity valve at fuel tank page
20-2, item 4
To disconnect, press release buttons on connector
4 - Throttle valve control unit
5 - Activated charcoal filter with solenoid valve 1 (N80)
Installation point: in right of engine compartment
To remove, take off PAS reservoir andpush to the side
6 - Spring nut
Removing and installing parts of the activated charcoal filter system Servicing throttle mechanism
1 - Throttle cable Adjust by re-positioning locking ele- ment on detent page 20-13
2 - Locking element
3 - Accelerator pedal
4 - Spacer bush
5 - Bearing bush
6 - Washer
7 - Stop screw
8 - 20 Nm