Re: ECM-what does it do? - Saab 900 Bulletin Board - Saabnet.com
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Re: ECM-what does it do?
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Posted by Muel [Email] (more from Muel) on Mon, 9 Apr 2001 13:19:19 Share Post by Email
In Reply to: ECM-what does it do?, doogie, Mon, 9 Apr 2001 00:08:16
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ECU Function

The ECU receives information from the following sensors:


The ignition system provides information on engine speed.
The temperature sensor provides information on the temperature of the engine coolant.
The throttle position switch provides information on the position of the throttle butterfly. In the LH 2.4.2 system, the switch is replaced by a potentiometer sensor.
The air mass meter provides information of the air mass supplied to the engine.
The oxygen sensor provides information on the oxygen content of the exhaust gases.
The speed sensor provides information on the speed of the car.

In other word the ECU allows you to troubleshoot systems in your car in minutes that would otherwise take hours of specific testing to figure out. It also relays all this information betwen the devices in your car to maintain emmissions control etc.
Da Muel

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