Fiat Croma Phantom Problem

**pizdun9245** · 3rd January, 2019, 11:43 PM

Greetings guys,

I have Fiat Croma 2010. 1.9Mjet 8v in my garage and it has phantom problems.
First problem is that sometimes car cant start due to the code key lamp on the dashboard.
I put it on examiner and I read the following faults:

Body Computer Marelli 3

D601- Can fault, Can-bus dissabled
D600- Minicrypt, nothing recived in Engine Control Module
-----------------------------------------------------------------

Engine Controle Modue EDC16C39

U0426- Electronic key
----------------------------------------

Those are faults when car cant start. But after a while, if u let him rest, he suddenly starts.
Engine works fine, batery voltage is 14,10V in idle.
And after a few minutes dashboard goes crazy.
Rpm and KM/h drops to zero. Coolant temperature drops to zero. Streering wheel and battery lamps turn on, tho streering wheel in that moment is not hard to handle, and battery voltage is the same 14,10V.
Only fuel gauge stays where it should be. ABS lamps are on, but they are on for like a year, coz ABS aint working..

What I've done so far:

1. Checked fuses on both body control moduel and under the hood. And removed connector from bad ABS module just in case not to drop can bus.
2. Tried with second key, when car didnt wanna start, same problem.
3. Removed Engine Control Module, to check wiring and because it is above right fron wheel under the wing. Opened ECM to check for water, found nothig but bad pins on the board, but it was all dry. Fixed bad pins on the board, and all the big components resolder them all.
4. Removed Body Control Module. also found bad pins on the board, resolder them too.
5. I found wiring diagram here on forum, and checked wiring for CAN BUS. Fist I checked ABS-ECM can wires, all good. Then ECM-BCM, all good.

So my question for you guys is:

1. I remember fiat stilo having electronic steering connected to BCM via CAN BUS, this Croma has differente type of Servo. Does that Servo Pump has CAN-BUS that is connected to BCM, and can that drop my CAN and manifest like that one the board?
2. Am I missing any other module that can drop CAN BUS and mess this car up, and also play with my nerves

Sorry for long post, I wanted to be detalied on this problem, need all help I can get

Thank you and cheers!

**Meat-Head** · 4th January, 2019, 01:20 AM

The more info the better. See if engine starts with dashboard clocks out

**simaservis1108** · 4th January, 2019, 06:17 PM

Try with other ECU.
When you have CODE lamp on,does check engine light appear?

**pizdun9245** · 4th January, 2019, 07:35 PM

Thank you for response guys

I found what is the problem.. It is servo pump, Can-Bus goes on it. When I unjack it, I can start the car, and everything on the dashboard works fine, just steering wheel lamp is on, and wheel is hard to turn.. Got a new pump, I'm gonna replace it tomorow.
Cheers!