T133 won't crank

[BG Blaze]

My Valtra T133 stopped in the middle of the field, just went off, no strange noises or else. Like i turn OFF the ignition.
Afterwards i switch ignition OFF- ON, all looks normal, dash, indicators etc. but no crank !
If i jump leads on the starter, it crank normal, but engine wont start. Anyone have service manual available? What could prevent engine from crank/start?

 

[BG Blaze]

Here is a service manual for Valtra T series T133 H / T153 H / T173 H / T193 H


So far i checked all power and ground wires to the ECU. All seems to be fine.

And one thing got my attention: when turn ignition ON, after bulbs and cluster check, the indicators for oil pressure are not ON, which means for me that something is wrong with communication or power of ECU.

In operator manual is said ( and also on every car, truck, machinery) oil pressure indicator must stay on at ignition ON and goes off when engine is started!

 

[PatTraxxx]

Have you sorted this one out?
If the ECU doesn't see oil pressure, it won't let the engine start, which is a safety feature to prevent damage.
I'd suspect it's more of an issue with the ECU, a broken signal wire, or maybe a blown fuse.
I'd double-check all your fuses first, especially for the engine management.
Then if you have a Valtra-specific diagnostic tool, that would be the next step.
Otherwise, you might need a dealer to plug in and see what's going on.

 

[Alan]

Since it cranks when jumped, the starter is fine. On the Valtra T133 from Valtra, it’s likely a safety interlock, start relay, or ECU inhibit issue.