Dead battery. Replaced with new. Now won't start

[Clavurion]

Originally Posted by bhennrich

I think you need to re-pair your EWS module to the DME

If EWS-DME sync is lost the engine will crank but fuel injection is not allowed.

Sounds more like you have problem with EWS module recognising key (transponder chip) if the other key did the same previously. With proper diagnostics you can check from EWS module what things (if any) are preventing starter activation.

[lo_jack]

Originally Posted by Clavurion

If EWS-DME sync is lost the engine will crank but fuel injection is not allowed.

Sounds more like you have problem with EWS module recognising key (transponder chip) if the other key did the same previously. With proper diagnostics you can check from EWS module what things (if any) are preventing starter activation.

How does it 'not allow' fuel injection, specifically? Will it not power on the pump?


If BST fails, does it also not power the fuel pump?

[Clavurion]

Originally Posted by lo_jack

How does it 'not allow' fuel injection, specifically? Will it not power on the pump?

If BST fails, does it also not power the fuel pump?

Engine ECU won't activate fuel injectors. On diesel engines it will also prevent rail pressure rise by keeping fuel volume control closed and rail pressure regulator open.

Cable from BST powers only starter motor and alternator (and engine bay jump start connector) so if BST is open engine could work normally if you just get the engine turning (for example by towing or hill start with manual gearbox) as long as battery voltage stays high enough.