PDA

View Full Version : Opel 1.3cdti P2146


budG60
30th December, 2014, 05:02 PM
Does anyone what could be defect in the ecu if P2146 Injector supply voltage is always present?
Ecu type is Magneti Marelli MJD.
Babos
30th December, 2014, 11:30 PM
check wires to injectors if all ok ecu is brocken!
budG60
31st December, 2014, 12:03 PM
The wiring and injectors are fine, so I already suspected the ecu to be broken, but I would like to know which part (chip) of the ecu might be broken, so I could try to repair the ecu.
Babos
31st December, 2014, 01:13 PM
I think transitor from Injector must check and ways to pinout
gitko
31st December, 2014, 03:20 PM
put image here and I'll tell you
ecutuners
31st December, 2014, 03:36 PM
Square mosfet chip usually
budG60
31st December, 2014, 03:54 PM
picture of the PCB
mihaiservice
2nd January, 2015, 12:33 PM
picture of the PCB

Hi
also in your picture you can see some water on board......
budG60
2nd January, 2015, 12:44 PM
yes, water seems to be the cause, but I have cleaned it and the resistor values and opamp which got wet are fine. Perhaps something else got defect, but I cannot find it.
All transistors are fine.
budG60
5th January, 2015, 05:28 PM
any suggestions?
mihaiservice
7th January, 2015, 10:30 AM
Hi
check all resistors in that area...one or more are damage by water

Mike
einet
7th January, 2015, 09:08 PM
this is not Tranistors is all a FET.
And how you messure on circuit the FET?

Make a with the multimter (-) negative refence and make over multimter diode all kegs from the FET?s and compare all curcuits.
So you can find your problem but when you dont know electronics, forgeht it! give this to another one.
budG60
10th January, 2015, 12:40 PM
the internal drain source diodes all seem fine, so 95% chance the FET's are fine, because this is typically the part which gets defect of a FET. Resistors also are fine.
I think I need to look for another ecu.
romaiz96
10th March, 2019, 03:48 AM
the internal drain source diodes all seem fine, so 95% chance the FET's are fine, because this is typically the part which gets defect of a FET. Resistors also are fine.
I think I need to look for another ecu.Hi
Did you manage to get the ecu sorted ? I've got a similar problem got my ecu repaired plugged back in and found that 3 of my injectors were also faulty replaced them with working ones now im getting a permanent supply to the injectors and they are not pulsating, what could the problem be ?
Thanks in advance

Sent from my SM-G960F using Tapatalk