Hello everybody,

Can you please let me know how exactly to disconnect the D shaped clip connector that is connected to the alternator?

Regards,

Hatem.m

Also, once you've put the screwdriver in, push the connector ON a little bit more before pulling it off, helps to free the clip.

Thanks a lot for your help.

Also, once you've put the screwdriver in, push the connector ON a little bit more before pulling it off, helps to free the clip.

Thanks a lot for your help.

I need to know exactly what type of alternators installed in skoda Fabia 2003 AME engine 1.4 MPI since I thought it is a Bosch one with p/n 037903025M (90A 14 V)

But unfortunately mine is not .

My question is what type could be mine?

I can not figure it from the back cover and I did not remove it from the car.

Edited 15 March, 201610 yr by amosalamy

It could possibly be Valeo

It could possibly be Valeo

Yes you are right.

Can you tell me any p/n for it or if you have a photo for it.

My problem is the Bosch one can not fit.since mine has 3 holes to fix it to the bracket but the p

Bosch one has four holes.

I need to show a photo of the Valeo to the stores since it is not removed from its bracket and the car is not moving.can not take a photo for it in its current position.

I'm not sure. There are quite a few different part numbers which is confusing. Best to see if you can get the part numbers off the old one.

I'm not sure. There are quite a few different part numbers which is confusing. Best to see if you can get the part numbers off the old one.

Looks like it was on a sticker not engraved and the sticker is somehow removed.

I think I am going to move it to the mechanic shop to remove the alternator.thanks for your help.

If it's any help my car is also an mpi (no air conditioning) and my alternator is a 'Magneton' 047903017     70 Amp. Three mounting holes.

Edited 17 March, 201610 yr by TMB

Anyone knows the wiring of the D shaped connector that goes to the alternator (two pins only 1 and 2).

I mean both wires connected to what in the car harness and goes exactly where inside the alternator.

Pin 1, blue wire, goes to a two-way connector pair mounted on a bracket at the front of the gearbox, and from there to the firewall connectors, and in to the Onboard Supply Control Unit in the cabin, connector XS4/T18a pin 9.  This wire supplies the start-up current to generate the initial field current needed before the alternator can start generating its own power. It may also be used to monitor the alternator's output voltage, because once the alt is generating its own current, this is at the same potential as the output terminal where the thick wire connects.

 

Pin 2, brown/red wire from alternator, DFM signal. Goes to same two-way connector pair at the front of the gearbox, where it changes colour to purple/green, and carries on to the Engine ECU, connector T81a, pin 13.  This is an information signal that tells the engine ECU how much of the available generating capacity the alternator is using at any moment in time; how heavy the electrical load is on it, in other words. This info is shared with other CAN connected modules.

 

Within the alternator, both wires connect into the voltage regulator module, initially.

 

Generally, one or both wires break at the two way connector pair down on the gearbox. 

Edited 19 March, 201610 yr by Wino

Pin 1, blue wire, goes to a two-way connector pair mounted on a bracket at the front of the gearbox, and from there to the firewall connectors, and in to the Onboard Supply Control Unit in the cabin, connector XS4/T18a pin 9.  This wire supplies the start-up current to generate the initial field current needed before the alternator can start generating its own power. It may also be used to monitor the alternator's output voltage, because once the alt is generating its own current, this is at the same potential as the output terminal where the thick wire connects.

 

Pin 2, brown/red wire from alternator, DFM signal. Goes to same two-way connector pair at the front of the gearbox, where it changes colour to purple/green, and carries on to the Engine ECU, connector T81a, pin 13.  This is an information signal that tells the engine ECU how much of the available generating capacity the alternator is using at any moment in time; how heavy the electrical load is on it, in other words. This info is shared with other CAN connected modules.

 

Within the alternator, both wires connect into the voltage regulator module, initially.

 

Generally, one or both wires break at the two way connector pair down on the gearbox.

This is very useful indeed but I understood that pin 1 goes to the ignition switch through the battery indicator (in dashboard).Is that correct?

No, that's not correct. Who told you that?

 

If it is broken, the battery light in the dashboard will no longer come on, but that isn't wired directly.

Edited 19 March, 201610 yr by Wino

No, that's not correct. Who told you that?

 

If it is broken, the battery light in the dashboard will no longer come on, but that isn't wired directly.

Your answer Seems to be more logic

Can anybody answers me?

I have skoda Fabia 2003 1.4 MPI AME engine,6Y3 with the following code you can see from windshield

TMBDB06YX33646318(no Air condition)

A Valeo alternator is installed by the manufacturer

Can I swap it with a Bosch one for Fabia or it will not fit in the same bracket

.

Does the battery light come on when you switch on the ignition?

Just to note that the dash light may not be an infallible guide that the alternator is getting the required initial current to the field coil.

 

I had what I suspect was the "broken wire" problem while not losing the red light on the dash (in a 2002 mk1 fabia tdi) - the car didn't charge until the revs went above about 3k for some reason. It was before I was aware of briskoda or indeed this issue and I cheated by leaking some current into the field coil with a tap into the crucial wire at the alternator which caused it to self-start and charge properly - clearly a bodge. Back in the day with early alternator designs it was actually the current through the red dash bulb that flowed through the field coil and started the alternator but I suspect that the red light and field current are handled separately by the ecu in our fabias - happy to be corrected of course.

Does the battery light come on when you switch on the ignition?

Yes it comes on and measured that the alternator is not charging.

For example:before starting the engine the battery voltage is 12V after starting the engine it is 11.5V and lamp is on all the time.

Just to note that the dash light may not be an infallible guide that the alternator is getting the required initial current to the field coil.

 

I had what I suspect was the "broken wire" problem while not losing the red light on the dash (in a 2002 mk1 fabia tdi) - the car didn't charge until the revs went above about 3k for some reason. It was before I was aware of briskoda or indeed this issue and I cheated by leaking some current into the field coil with a tap into the crucial wire at the alternator which caused it to self-start and charge properly - clearly a bodge. Back in the day with early alternator designs it was actually the current through the red dash bulb that flowed through the field coil and started the alternator but I suspect that the red light and field current are handled separately by the ecu in our fabias - happy to be corrected of course.

Seems very logic to me.agree with you.

No it is not,thanks for help.

Any body knows the V ribbed belt for skoda Fabia AME Engine 1.4 8valve 2003 with compressor(A/C)

What is the P/N for it and the size for example 5PK1400?

According to this page, there are four different part numbers that might be fitted to a 2003 Mk1 Fabia with AME engine:

 

(04)7 903 015 Q;  a 70A Bosch unit

(04)7 903 017;  a 70A Magneton unit

(03)7 903 025 M;  a 90A Bosch unit

(02)8 903 026 H;  a 120A Bosch unit

 

Of course, the one fitted to your car may be a different manufacturer's copy of one of those units, fitted as a repair/replacement.

 

I think all those part numbers need to have '03' or '04'? added at the start to make them fit the usual VAG part number structure. 

 

First two seem to need 04 prefixed, third one 03, no idea on last one as no ebay listings come up with 03 or 04 as the first two numbers in front of what's above; maybe just rare. Ah,  02 works as a prefix for the 120 A one e.g. these ones.

Edited 20 March, 201610 yr by Wino

Any body knows the V ribbed belt for skoda Fabia AME Engine 1.4 8valve 2003 with compressor(A/C)

What is the P/N for it and the size for example 5PK1400?

 

047903137AB

 

21,18X1748MM

Edited 20 March, 201610 yr by TMB