Computerized Engine Controls: Notes

940 models use a Bosch LH-Jetronic multiport fuel injection system with EZ116K electronic ignition system or Regina (Bendix) multiport fuel injection system with Rex-1 electronic ignition system. Both systems have self-diagnostic capabilities.

All systems use an Electronic Control Unit (ECU) that receives input from engine monitoring sensors. These sensors include camshaft sensor (EZ129K), coolant temperature sensor, air temperature sensor (Regina), pressure sensor (Regina), oxygen sensor, knock sensor (EZ129K, turbo), mass airflow meter/sensor (Bosch) and throttle switch. ECU uses these input signals to control air/fuel mixture for emission control, fuel economy and good driveability. Ignition and fuel controls are provided by a single ECU.