Two lights on the dashboard underneath ECONOMY, one amber, one green. I understand that green probably means that the fuel consumption is good and that the amber one is that it is bad and you are either in the wrong gear or putting too much fuel to the engine.
What drives the lights to change - vacuum, accelerator pedal? What?
It's a very complex computer driven feedback system with many sensors, measuring things like engine RPMs, torque pressure, barometric pressure outside temperature of incoming air, all kinds of things
Are you sure - in a 1989 vehicle? I thought that the most complex electronics inside the car was the radio - at least it is transistorised.
Scotty does not usually revisit topics he has already answered.
He may have misread the year, but in any event you're not talking about a 1965 Chevy that has virtually no electronics. By 1989 most cars had electronic fuel injection in the U.S., and even those that still had carburetors had electronic systems for emission control as well as electronic ignition systems.
As far as what controls those amber and green lights, I have no idea, I'm not familiar with that car.
If you are right, and I am sure you are, where would this very complex computer be located in this very Spartan car?
You can find repair manuals for 1989 Corolla here:
@chucktobias Many thanks.
Hi Scotty,
Are you sure - in a 1989 vehicle? I thought that the most complex electronics inside the car was the radio - at least it is transistorised.
If you are right, and I am sure you are, where would this very complex computer be located in this very Spartan car?
Thanks, Simon.