Skoda Fabia 1999-2007 1.2 6V/12V engine removal (propably about same on others too)

 

Battery fuse box

Battery

Battery holder (3x 13mm)

Main (+)-cable (10mm)

Ecu connector (big one)

Other big connector near left wing

Both wheels

Inner wheel arches

Engine under plastic (lot of T25 torxes)

Remove plastic rivets under bumper

Alternator cable

Starter motor cable

Lambda sensor cables

Engine earth cable

Reversing lamp switch cable

Cooler fan connector

Temperature switch connector

Detach downpipe and 1-2 exhaust pipe hangers

Drain coolant from left side of radiator

Inner driveshaft flanges (6x 8mm XZN x2)

Remove engine under support (2x 16mm)

Drain clutch fluid (11mm)

Gearstick cables

Detach air pipe from brake booster

Disconnect coolant reservoir

Disconnect two big radiator hoses

Detach heater matrix hoses

Disconnect fuel hoses

Remove both headlight washer covers

Unscrew but do not remove washers' screws (4x T20)

Disconnect washers from fluid reservoir (pump)

Remove bumper upper screws (2x T30)

Remove bumper

Remove bonnet cable

Detach headlight connectors

Remove side screws (2x T30)

Remove locking plate screws (2x 8mm XZN)

Remove bumper plate (6x 8mm XZN)

Remove front section of car

Remove motor heater cable if exists, or anything i forget to mention

Support engine with motor hoist

Remove both engine supports

Remove engine (careful with wiring loom)

 

Nice list.

That's for a car without A/C, it looks like?

 

For cars with A/C there are some instructions including what to do with compressor here: https://workshop-manuals.com/skoda/fabia-mk1/power_unit/12/40;_47_kw_mpi_engine/engine_assycylinder_blockcrankcase/removing_and_installing_engine/removing/

 

Looks like you can leave the refrigerant circuit unopened if you're careful. Also suggests removing the clutch slave cylinder from the gearbox to keep that hydraulic circuit closed.

 

 

Anyone know what is this connector ? For some reason can't figure out where it goes.. 

 

 

Must be for reverse light switch, I think? Two contacts?

Switch is low down on the front face of the gearbox.

4 minutes ago, Wino said:

Must be for reverse light switch, I think? Two contacts?

Switch is low down on the front face of the gearbox.

 

No. It's already connected. And that doesn't fit to it..

Wire colours?

Alternator L and DFM connections next guess. Does your battery light come on with ignition?

Edited 25 October, 20187 yr by Wino

Oil pressure switch?

14 hours ago, Wino said:

Wire colours?

Alternator L and DFM connections next guess. Does your battery light come on with ignition?

 

Brown + blue

 

Battery light does not come.

 

 

6 minutes ago, DtiJ said:

 

Brown + blue

 

Battery light does not come.

 

 

 

Connect it to the alternator then.

I'm not sure if that's the one that goes directly into the back of the alternator, is it long enough?

If not, you should find the mating half of that connection on a steel bracket hanging off the front of the gearbox, near the starter motor. Lambda sensor connectors are on the same bracket I think, but I'm not too familiar with the exact layout on the AWY/BMD engines. 

7 hours ago, Wino said:

I'm not sure if that's the one that goes directly into the back of the alternator, is it long enough?

If not, you should find the mating half of that connection on a steel bracket hanging off the front of the gearbox, near the starter motor. Lambda sensor connectors are on the same bracket I think, but I'm not too familiar with the exact layout on the AWY/BMD engines. 

 

It's not long enough and alternator already is connected. But alternator light still does not come when ignition on...

 

There is maybe some mismatching with new engine wiring loom. I'll extend wire to connect it to alternator and see what happens.

 

My car is little bit mixed up with AWY and AZQ...

 

AWY has alternator connector in engine loom? and AZQ has it in alternator/starter/lambda loom? So now I have both, great

 

 

 

 

I can study the wiring diagrams soon, when I get home, but certainly on most Mk1 Fabias there is a socket-to-plug section within the alternator connecting loom, which finishes at the bracket on the front of the gearbox, then there's a socket mating into this that is part of the engine bay loom.  Can you identify this plug/socket pair on the bracket on the gearbox? Are the wires all unbroken either side?

 

11 minutes ago, DtiJ said:

There is maybe some mismatching with new engine wiring loom. I'll extend wire to connect it to alternator and see what happens.

 

Worth trying, yes, but maybe follow the wires from the connector that is plugged into the back of the alternator and see where they currently go to first.

 

Looks like the AWY arrangement has the two wires from the alternator connector going to the 14-way connector on the left suspension turret next to the main battery earth, instead of what most Fabias have. Pins 3 and 4.

Now my alternator 2-pin connector comes from same loom as that unconnected plug 

 

I'll attach pictures of

 

- AWY engine loom (alternator end). Notice it's next to ignition coil connector. 

- AZQ engine bay loom (alternator end). Picture shows also both lambda connectors. 

 

I have now connected AWY engine bay loom alternator end to my AZQ engine alternator -> instrument panel not showing battery light, however alternator works (14V-15V on idle at battery)

 

Am I right if I say I'm missing extension wiring between alternator and bracket next to lambda connectors?

 

Edited 27 October, 20187 yr by DtiJ

Sorry, I'm being a bit slow here, but what engine did the car originally have, and what year is the car?

What engine does it now have? (From what year?)

 

I'll draw a couple of quick sketches of how the wiring goes in AWY and non-AWY cars and photograph it. Back soon.

1 minute ago, Wino said:

Sorry, I'm being a bit slow here, but what engine did the car originally have, and what year is the car?

What engine does it now have? (From what year?)

 

I'll draw a couple of quick sketches of how the wiring goes in AWY and non-AWY cars and photograph it. Back soon.

 

Originally AWY, car is 2002, now AZQ (from 2003).

 

 

 

OK, so yes, I think you just need to get the two wires from the connector in your second picture to get to the alternator.

 

I started a sketch, but I'm crap at drawing.

Try these. OBSCU is the Onboard Supply control unit in the cabin, ECU is engine ECU.

 

 

what is purpose of that brown? and blue? 

 

i connected them like that azq picture but no battery light when on ignition. I left everything unconnected but no battery light. Alternator gives 14,5V+ on idle.

 

IS THERE EVEN battery light in instrument panel?!

Blue gives the alternator field coil some current to help it to start generating, brown tells the engine ECU how much electrical load the alternator is experiencing.

On some petrol Fabias/Polos neither function seems to be essential. The voltage regulator on the alternator seems to be able to start the generating without the blue wire. The ECU doesn't appear to do much with the load info. Diesels seem to be more vulnerable and often don't start generating if the blue wire is broken.

 

There is a battery light though.

 

Measure volts at each of the pins of the alternator loom connector with ignition on. Blue wire will show 11-12V and brown close to 5V or close to 12V (varies with engine ECU type, I think) if both wires are intact all the way to their destinations. 

I disassembled loom starting from alternator, and blue+brown goes to bracket at gearbox, and ends to connector. So i am missing wires between connector and ecu+obscu. I'm not going to start building them, so I think car is fine now. Maybe I add ignition +12v to blue wire if there is good spot doing that. But it's not urgent as alternator works,

Don't just connect ignition 12V to the blue wire connection. It would need a reverse current blocking diode and current limiting resistance to avoid problems.

 

I can give you more details about exact destinations of the two wires at the ecu and firewall connectors later today.

On 27/10/2018 at 19:55, Wino said:

Try these. OBSCU is the Onboard Supply control unit in the cabin, ECU is engine ECU.

 

 

 

hello. pins 3+4 are not existant in 14-way connector.

 

I think I have to find alternator light pin from instrument panel?

There isn't one. The alternator excitation comes from the OBSCU. Which looms have you changed in the engine bay, everything?

14 minutes ago, Wino said:

There isn't one. The alternator excitation comes from the OBSCU. Which looms have you changed in the engine bay, everything?

 

Engine loom and short loom which is front of engine