Ford Fcous 1.6tdci Generator Fault P1632

[ruffles1986]

Hi i have a ford focus 1.6 tdci '05 (engine PSA) the car came from other garage and the car not start. i checked old ecu and no comunication with flash, then i bought other ecu and clone. After that the car start normally but i have two DTCs.

P0620 Generator Control Circuit Malfunction
P1632 Smart Alternator Faults Sensor/circuit Malfunction

We talk about this with owner and he said already have problem with alternator (led battery in dash) , maybe it was the cause of dead that old ecu by exces of voltage.

Well, we change the generator for a rebuild generator, but the problem persist, the voltage are in normal range 13,5v 14,5v
The led of battery is on and same DTCs

What can be the problem? any sugestion?

[Meat-Head]

Yeah commom fault, that itsy bity teeny weeny red/yellow or pure red thin wire on the dynamo cut it and join to battery feed on alternatir


hiw dud you copy the flash?

[ruffles1986]

Yeah commom fault, that itsy bity teeny weeny red/yellow or pure red thin wire on the dynamo cut it and join to battery feed on alternatir


hiw dud you copy the flash?

I can't copy the flash, y search for flash in forum by ref. number.

Sorry but my english is not good.... i see the connector of alternator have 3 wires, one i believe is +12V and the others two are signal from ecu to generator, and signal from generator to ecu.

Then you said i must cut one wire and join it direct to battery +.

Sorry agin but i not stand you well...

Thanks

[Meat-Head]

You have a red wire +12 volts. Join to +12 of the generator/alternator

ignore the blue and grey. Try it see what happens

[ruffles1986]

Ok unplug connector, and connect only a wire from battery + to pin 3 of alternator. But without square signal maybe came fault?? Anyway i test your solution and report.
Other question, the car is in limp mode, but mil is not on, only red led is on and in display appear engine fail, a mechanical frien said that cars with fault alternator the car go to limp mode, is true??

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[Meat-Head]

NO NO

the red wire at the generator cut it 4" from the generator and connect to the 8mm stud

i guess the thin red wire has a bad connection

[ruffles1986]

Ahh ok, you think the red wire is generating the problem, and can be red wire is broken in some point and not have good continuty


sorry but some times i not stand good... problem of language

[Meat-Head]

Ahh ok, you think the red wire is generating the problem, and can be red wire is broken in some point and not have good continuty


sorry but some times i not stand good... problem of language


YES YES YES YES YES

[ruffles1986]

Hi, i check pin 3 and have 12+ and good continuty, check pin 1 and 2 from alternator connector to ecu connector and have good continuty and not it in short, then problem of alternator or Ecu... the regulation voltage not work, i measure tension of battery and always 14.53, i on all lights, radio on, heat on, move direction and always same charge, the monaday i go to tray to use other ecu, this ecu came from scrap maybe fautly.

[ruffles1986]

I read a oficial info of Valeo, and they said the battery need to be of silver calcium, not valid lead acid... can be this the problem??

[Mrubbert]

Did read that some have problems with wrong battery.
Did you have load on curcuit when you checked contenuity on cabels ?
Connector pins goood ?
Same power and ground reference on battery on all tests ?
And the voltage drop was only ?

Alll Power - Ground on ECM. with load ?
-------------------------------------------------------
Trying to help, But just say its good continuity is not always the thru.

[genius76]

Silver calcium battery - Wikipedia, the free encyclopedia (http://en.m.wikipedia.org/wiki/Silver_calcium_battery) read about charging voltage

[ruffles1986]

Silver calcium battery - Wikipedia, the free encyclopedia (http://en.m.wikipedia.org/wiki/Silver_calcium_battery) read about charging voltage
Then if not have correct battery this alternator system can overcharge the battery?, up temperature and resistnece and can create the problem?? Really the alternator is chargin 14.53v (is in range 14.4v - 14.8v) but the system must up and down the charge depending of consumptions but this not happend

[Meat-Head]

but the system must up and down the charge depending of consumptions but this not happend

Chances are the. System is quicker than you and is wirking 100%

suggest leave engine at idle for 10 minuets with EVERYTHING turbed on see what happens then hit the gas to 2500 rpm

[racin-snake]

the ecu monitors battery voltage search Google for FORD SMART CHARGE procedures and checks

id definitely be checking before condemning ecm !

[scoot]

hi i had this exact problem i had faulty ecu and replaced it with a cloned peugeot ecu and got same faultcodes and in limp mode i replaced ecu with ecu from ecu from chassis no and all was perfect . i believe ecu hardware is different. Ihope this helps you regards scoot

[ruffles1986]

the ecu monitors battery voltage search Google for FORD SMART CHARGE procedures and checks

id definitely be checking before condemning ecm !
Yes i already read abou the system, but i not found the problem... i am now reading about coomon faults, wire from pin 3 broken at 2 to 4 inch (it is not my problem), and a broken wire at the back of the speedo head.( tomorrow check it)

[ruffles1986]

hi i had this exact problem i had faulty ecu and replaced it with a cloned peugeot ecu and got same faultcodes and in limp mode i replaced ecu with ecu from ecu from chassis no and all was perfect . i believe ecu hardware is different. Ihope this helps you regards scoot
Yes peugeot ecu have different hardware, but this ecu is from focus C-Max EDC16c34-4.33

[Mrubbert]

Did you ever take any AMPERE messurement ?
Its a really good idea, not just talking about voltage and other stuff.

[racin-snake]

Yes peugeot ecu have different hardware, but this ecu is from focus C-Max EDC16c34-4.33


the monitor wire to PCM and also fuse and smart charge relay need to be tested too this system IMHO is over complicated silver calcium battery and earths to dash need to be tested as does fuses

best bet to get a diagram for system and also if you have an oscilloscope to see if the alternator and PCM are doing as they should if its a ford EDC16 try flashing PCM with file from configs in IDS
as simple hardware faults can be tested software faults not so easy to find

good luck

[Meat-Head]

Snake mate can you explain anout the dash earths? Not had thst before

also should default charge 13.8 when unplugged
bekeive non caliyummy battery dont last long

iShit 3

[racin-snake]

unplugged the alternator behaves as normal alternator but keeps battery light on dash ....(while it batters these silver calcium batteries ) over complicated shitty system !

compound earth wires under the A panel at drivers feet can cause all sorts of issues on dash

[ruffles1986]

I not have osciloscope, today i can't work in the car, when i have news report.

Thanks to all for help

[ruffles1986]

the monitor wire to PCM and also fuse and smart charge relay need to be tested too this system IMHO is over complicated silver calcium battery and earths to dash need to be tested as does fuses

best bet to get a diagram for system and also if you have an oscilloscope to see if the alternator and PCM are doing as they should if its a ford EDC16 try flashing PCM with file from configs in IDS
as simple hardware faults can be tested software faults not so easy to find

good luck

I see one wire have continuous square wave, and other have square wave but change with load. unfortunately i not have osciloscope, with it would more easy found the fail.

[Mrubbert]

Thanks.. .. .. .

[scoot]

there are different stages of ford ecus all look identical .look in fuel filler cap see if there is a magnet to inject fuel into dpf if wiring to alternator is good maybe you should check ecu model again i know i have said this before but this is exact fault i had regards scoot

[ruffles1986]

Thanks.. .. .. .

I wait for friend to borrow a oscilloscope, in next week i hope have news...

[ruffles1986]

there are different stages of ford ecus all look identical .look in fuel filler cap see if there is a magnet to inject fuel into dpf if wiring to alternator is good maybe you should check ecu model again i know i have said this before but this is exact fault i had regards scoot

Thanks for reply but the ecu is checked and is same hardware version 4.33 and i think the ecu never was open, then the hardware correspond with ecu label... i think

[danymec]

Good, the problem and the regulator rebuilt generator, which are not compatible with the car.
Tries with the original equivalent generator


Sorry for my english.

[d.zio]

as i remember from the dealers of the ford it requires programing the ecu with ids for this fault

[Mrubbert]

I wait for friend to borrow a oscilloscope, in next week i hope have news...

Try borrow a DC clampmeter at same time.
And tell the scope owner "Thank you" from me ;

[ninja123]

I had this problem with a 2011 focus tdci, ecu was damaged in crash, i program another and same issue as you, I take ecu, dash, bcm and key from other car and all work ok - even though the first ecu i program had same numbers for hard/software.

ninja

[ruffles1986]

I had this problem with a 2011 focus tdci, ecu was damaged in crash, i program another and same issue as you, I take ecu, dash, bcm and key from other car and all work ok - even though the first ecu i program had same numbers for hard/software.

ninja
Thanks for your info, my second ecu came from scrap, maybe on crash some up voltage or short circuit could damage de ecu. We changed the generator for a rebuilding generator because the old ecu is fried (and voltage up to much), and now we don't know if the problem is bad regulator of generator or the ecu is damaged too...

But is possible on crash the ecu can damage if the wires was cut.

The thursday a friend of other garage changed generator from Ford Focus 2.0tdci 136cv from '06, for a rebuilding generator, the customer came again because the lights down when turn direction, and revolutions came down. (he said me that mean the regulator was bad)
Maybe some rebuilders have problem with this system... and now i dont that mean

Definitely i need a oscilloscope to diagnose if the problem is ecu or generator regulator

[ruffles1986]

Well finally test signals with oscilloscope and not signal from Alternator, replace it and problem solved.

Very thanks to all for your help

[fider]

Is it was earlier said about the Fuse responsible for the smart charging system?
I have deleted the one and now have P0620: Generator Control Circuit, P1632 codes on the Focus II 1.6 TdCI.

[pacurar]

Hello, I have a problem with a ford focus 1.6 tdci code G8DD, which I have the error
P0620 and P1632.
The alternator was mounted on another car and is OK.
Please help me with the motor computer diagram so I can check the gray and blue wires. The red wire is ok has + 12V.
the computer is bosch 0281 015 608 (tel:0281 015 608)
The car is manufactured in 2010.
thank you

[Meat-Head]

Red wire cut join to b+ on altetnor

VAUGE MODE

blue and grey. Led test probe. 1 nothing with ignition off and ground when on
then change over with other

[pacurar]

It's done. The problem was with the connector entering the voltage regulator, imperfect contact.
I replaced the connector and it was fixed.
Thank you.