Kill Switch

SouthArk370Z

I _think_ I've figured it out. FSM EC-532 shows ECM terminal 93 (AKA Connector F102-93)* as being "Power Supply for ECM (Backup)" input with battery voltage applied at all times. Run a wire from the input of the disconnect relay contact(s) (or the battery terminal) to that terminal on the ECM and you shouldn't lose any stored data when you de-energize the disconnect relay.

*I'm not sure which of the three connectors going to the ECM is F102. Look for a pink wire in one corner of the connector. When you figure out which connector is which (F101, F102, and M107), please let me know.


References: 2009 FSM EC-148, EC-149, EC-523+, EC-536, EC-543


PS: You may want to de-energize the relay when you park for very long. It might run down the battery.

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Mankind has progressed past the need for war but we haven't evolved that far. - NachoMahma

SouthArk370Z

Does anyone know what effect a cold shutdown (disconnecting the battery) of the car has on the engine and other systems? It's safe to disconnect the battery when the car is off, but what about when you're tooling down the road at highway speed? A cold shutdown of an old (pre-computer control, no VVEL) car wouldn't worry me - all you'd lose is P/S and P/B - but I'm wondering what it would do to a modern car. Could you end up poking a hole in a piston with a valve? I'm not worried about radio presets or even ECM learned data, just things that would be harmful to the engine or other systems.

__________________
Steering Lock Links - Search The370Z Bookmarklet - FSM @ NICOclub
Mankind has progressed past the need for war but we haven't evolved that far. - NachoMahma