Design of the electronic engine management system (EEMS) (Priora 2170)

Lada Priora cars are equipped with an electronic engine management system (EEMS) with an electronic control unit (ECU) 21126-1411020-10 (-11 or -12) type Bosch M 7.9.7 (Bosch M 10 or "January-7" respectively). The engines use a sequential distributed fuel injection system (with phased injection) with feedback. This system, working together with the exhaust gas neutralizer and fuel vapor recovery system, ensures compliance with Euro-3 and Euro-4 standards while maintaining high dynamic qualities and low fuel consumption.

The electrical diagram of the fuel injection system is given in the section "Electrical diagrams".

Caution! 1. Before removing any ECM components, disconnect the wire from the negative terminal of the battery.

Caution! 2. Do not start the engine if the battery cable terminals are not tightened properly.

Attention! 3. Never disconnect the battery from the vehicle's electrical system while the engine is running.

Attention! 4. When charging, disconnect the battery from the vehicle's electrical system.

Caution! 5. Do not expose the ECU to temperatures above 65°C in operating condition and above 80°C in non-operating condition (for example, in a drying chamber). If this temperature is exceeded, the ECU must be removed from the vehicle.

Caution! 6. Do not disconnect or connect the wiring harness connectors to the ECU when the ignition is on.

Attention! 7. Before performing electric arc welding on a vehicle, disconnect the wires from the battery and the wire connectors from the ECU.

Attention! 8. Perform all voltage measurements using a digital voltmeter with an internal resistance of at least 10 MOhm.