Opel Corsa D Ecu blowing fuse

[i_shot_the_sheriff]

Hey mates,

I got an Opel Corsa D Z13DTJ 2007 model and ecu MJD 6O3.S3 55568383. This car came to me because it's blowing the fuse for main relay all the time (10amps) !

The DTC shows P1625 and if you disconnect the main relay fuse still goes bad,,,,, i've tried everything ,,, at last i disconnected the ecu and fuse is ok with ignition on!!

I have opened the ecu but there is no visible burnt component or something


Has anyone seen this before? is there a way to repair the ecu?

I have read somewhere that the chip L9131 is controlling the power output and input of the ecu,,, maybe it's shorted?

Cheers

[Meat-Head]

Ok new fuse unplug ecu shirt 87 to 30 on relay stand back ...


then hen repeat experiment (iShit failure) unplug relay ecu, stand back

what about radio Milagros (iShit failure) locking bcm ses (iShit failure ) do they stay low of high volts in tech2?

[genius76]

Hm have long time ago sharan 1.9 tdi not pd
Gui draive with blowing fuse until car stops at all
Dead fuel pump regulator, shorted oleays ecu and blowed fuse every 10 miles
Ford fiesta 1.4tdci luse wires from crankshaft sensor sorted to driveshaft blowing fuses ecu until car not start at all
tray disconect some sensors first maibe here something shorting

[racin-snake]

what fuse ? give fuse no and details of components it covers please also maybe look at wiring diagram and see what fuse covers for yourself ?

[saka112]

try to remove fuel pressure and see what will happend

[i_shot_the_sheriff]

I have tried unplugging sensors but its still the same! Only difference is when unplugging ecu!

Today ive tried another ecu from a multijet (totally different nunbers) and the fuse is ok!

Fuse is 10 amps in the front fusebox and as far as I remember its in the 20th position (not really sure as car is kinda far from me and I come and go)

[levisdj]

Did you sort this meanwhile ? I have a similar issue... will update in the afternoon

So I opened the ECU, it doens't have visible water damage... alltough someone else has resoldered the big capacitors... in my case it kept blowing the F33 fuse 10A.... I replaced it with a 15A fuse ... that isn's blowing anymore, but still no crack and DTC P1625-02 Main relay low voltage...!Any suggestion is welcomed

[Meat-Head]

Sounds like both cars voltage regulator, work out which pin is incoming then first chip it hits see if gets hot and type number off chip into google with datasheet

[synkrotronic]

Did you sort this meanwhile ? I have a similar issue... will update in the afternoon

So I opened the ECU, it doens't have visible water damage... alltough someone else has resoldered the big capacitors... in my case it kept blowing the F33 fuse 10A.... I replaced it with a 15A fuse ... that isn's blowing anymore, but still no crack and DTC P1625-02 Main relay low voltage...!Any suggestion is welcomed

If not blow fuse,check inside again maybe some line in circuit

[racin-snake]

I have had the same ecu problem after repair for water ingress , never got round to repair but it was same codes same symptoms used ecu ficed fault

[levisdj]

Yeah, today I will get back to the car and will update this thread, thank you all for your time

[levisdj]

Ok, so updating this issue... the 15A got burnt eventually ... so what I did today was to remove the rail sensor plug(see photo) upgrade to 20A fuse.... (see photo) and the Main relay error was gone but I got a new one (see photo) ... after 5 minutes on ignition I started to smell burnt... and after seeing what's about.... all those parts in the red circle were burning hot... does that mean that the ecu is gone ? or should I unplug all sensors first and see what changes ? Me, never seen a Capacitor dtc before...thanks

[levisdj]

Its got a 10amp fuse in for a reason, so why put a 20amp one in it's place

Just short fuse out with nail, see how hot it gets then

JoK

I don't know wether to laugh or to cry for this helping answer ...!

[fes_786]

test every transistor in red circle and all the other ones

maybe u got a transistor that's internally shorted???

[levisdj]

I got a spare ecu coming in tomorrow... will swap eeprom data from one to another and update how that goes!Thanks guys!