Drivetrain malfunction after reconnecting ecm

project_68 · 04-18-2024, 05:57 PM

2018 x3 xdrive30i. 68k miles
Leaking coolant from rear ds of engine.
Suspected oil filter housing.
Replaced said housing.
Not only does it still leak coolant from same spot.
But now the car won't start.
Dash complains of "drivetrain malfunction"
I quadruple checked the ecm connectors and pins.
All good.
There must be something I'm missing.
Any thoughts?

ContactPatch · 04-18-2024, 09:09 PM

Did you disconnect the battery before connecting the ECM?

project_68 · 05-01-2024, 10:37 AM

Yes, both of them.
The battery in the front tested under 12v (11.72)
Attached trickle charger overnight. now at 12.8v
Still won't start(drivetrain malfunction) , stuck in P w/ parking break on🤷🏻

04-18-2024, 05:57 PM	#1
project_68 Registered 0 Rep 2 Posts Drives: Bmw x3 xdrive 30i Join Date: Apr 2024 Location: Usa iTrader: (0)	Drivetrain malfunction after reconnecting ecm 2018 x3 xdrive30i. 68k miles Leaking coolant from rear ds of engine. Suspected oil filter housing. Replaced said housing. Not only does it still leak coolant from same spot. But now the car won't start. Dash complains of "drivetrain malfunction" I quadruple checked the ecm connectors and pins. All good. There must be something I'm missing. Any thoughts?
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04-18-2024, 09:09 PM	#2
ContactPatch Major 2189 Rep 1,364 Posts Drives: It's Quick! Join Date: Sep 2018 Location: Idaho iTrader: (0)	Did you disconnect the battery before connecting the ECM?
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05-01-2024, 10:37 AM	#3
project_68 Registered 0 Rep 2 Posts Drives: Bmw x3 xdrive 30i Join Date: Apr 2024 Location: Usa iTrader: (0)	Yes, both of them. The battery in the front tested under 12v (11.72) Attached trickle charger overnight. now at 12.8v Still won't start(drivetrain malfunction) , stuck in P w/ parking break on🤷🏻
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