Does anyone know if the HVAC/Radio and power windows/locks will work with the ECU removed? Is everything run through the ECU?
Reason for the question is if one were to do an engine swap or run a stand-alone ECU, would the other stuff work?

 

I don't know for sure but they likely would. You could try disconnecting the PCM (or maybe just its power) and see.

 

The climate control module and ecm are on the canbus together. I am pretty sure the ecm contains a termination resistor. So if the ecm is unplugged i think the can network goes down

 

Good point - fit a 60ohm resistor if you need the CAN bus. I doubt if you do for the test you want to do.

 

I think the AC system would give you lots of grief. The AC module controls the compressor clutch via the ECM. Might be tricky to spoof that control chain.

The AC pressure sensor is another consideration. It provides feedback of the high side pressure via the ECM. The AC module needs this input or it won't command the clutch to engage. I suppose you could come up with a workaround but it would involve some serious head-scratching.

More details in this guide:

https://www.jaguarforums.com/forum/s...ol-how-185002/


Control of the radiator fan would be fun, too. IIRC, the fan control module receives inputs from both the ECM and AC module.

You didn't ask, but I'm not sure how the security system would react. The instrument pack is the heart of the security system and it communicates with the ECM. The ECM in turn has VIN-specific programming. If the instrument pack doesn't receive the secret handshake from the ECM, most likely it will go into theft protection mode.

Not saying it can't be done, but it could be quite the daunting task.