Computerized Engine Controls: Notes

Thel 940 models with 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 850 non-turbo models use a Bosch LH 3.2 multiport fuel injection system with a EZ129K electronic ignition system with knock sensor. 850 turbo models use a Motronic 4.3 injection and electronic ignition system. All 850 models are equipped with self-diagnostic capabilities.

960 models use a Motronic 1.8 injection and electronic ignition system. System has complete self-diagnostic capabilities.

All systems use an Electronic Control Unit (ECU) that receives input from engine monitoring sensors. These sensors include camshaft sensor (EZ129K and Motronic), coolant temperature sensor, air temperature sensor (Regina), pressure sensor (Regina), oxygen sensor, knock sensor (EZ129K, turbo, and Motronic), mass airflow meter/sensor (Bosch, LH 3.2, and Motronic), timing pick-up (Motronic) and throttle switch. ECU uses these input signals to control air/fuel mixture for emission control, fuel economy and good driveability. On 940 and 850 non-turbo models, ignition control is provided by a separate ignition ECU. On 960 and 850 turbo models, ignition and fuel controls are provided by a single ECU.