Update on unknown 4 gang connector

[wheelman]

I received the 73 240Z FSM today from Brad and looked up the 4 gang connector I had asked about in this thread http://forums.hybridz.org/showthread.php?t=100152.

 

Turns out the plug connects to a relay, which Mat73GNZ had located and linked a picture of so we could see it.

 

From page BE5 of the FSM, that relay is the Throttle Opener relay. It controls a solenoid(sp) that holds the throttle open a short time on throttle down when the car is moving. This is part of the original emissions equipment designed to reduce output when the throttle is suddenly closed. It might also be used when the car is cold as an idle speed control.

Bottom line is that it can be totally removed if you're swapping in another engine.

 

Also the black/white wires I mentioned in the other thread that appeared to be connected to switched power are and can be used for other purposes. The green/black wire connects to the speedo and is used to determine if the car is moving. The black/yellow wire activates the throttle opener solenoid and so should be removed.

All this pressumes you're swapping in a different engine and are not going to uses this circuit.

 

As for the ground wire I mentioned in the other thread, I haven't identified it yet but I will and it will probably also be removed.

 

This just proves how valuable an FSM is (Thank you very much Brad). I was trying to figure it all out using a Haynes manual which is marginal at best. Thats the last time I waste my money on one of those, I'll get an FSM for any future projects.

 

Wheelman