Fault injection system. Chevrolet Lanos (since 2004 of release), Daewoo Lanos (since 1997 of release)

REPAIR MAINTENANCE OPERATION OF MOTOR VEHICLES
Chevrolet Lanos (since 2004 of release), Daewoo Lanos (since 1997 of release)

general info. full specifications. diagnostics. hints. tips. tricks

By car used fuel injection system with feedback. Distributed injection called because the fuel is injected into each cylinder a separate nozzle. Fuel injection system reduces exhaust emissions while improving driving characteristics.

This section briefly describes the injection fault caused by the refusal of certain sensors. Removal and installation of knots of power systems and engine management is given in the "Power System" and "The engine management system".

The injection system with feedback set catalytic converter exhaust gas sensor and the oxygen concentration in the exhaust gas, which provides feedback. The sensor monitors the oxygen concentration in the exhaust gases, and an electronic control unit for its signals supports such air-fuel ratio at which the converter works most efficiently.

WARNINGS

Before removing any components of fuel injection system, disconnect a wire from the plug "minus" of the storage battery.

Disconnect the battery only when the ignition is switched off.

Do not start the engine if the tips of the wires on the battery poorly tightened.

Never disconnect the battery from the electrical system of the car with the engine running.

When charging, disconnect the battery from the vehicle electrical system, as increased current during charging can damage electronic components.

Do not expose the electronic control unit (ECU) above 65 ?� C in the operating state above 80 ?� C in a non-operating (e.g., in an oven). It is necessary to remove the ECU from the vehicle, if the temperature is exceeded.

Do not disconnect from the computer and do not connect it to the harness connectors with the ignition.

Before performing arc welding on the vehicle, disconnect the wires from the battery terminals and cables from the computer.

All voltage measurements follow the digital voltmeter, the internal resistance of which not less than 10 megohms.

Electronic components used in the injection system, designed for very low power, so they can easily damage the electrostatic discharge. In order to prevent damage to the computer from electrostatic discharge:

- Do not touch plugs or electronic components of the computer on its board;

- When working with programmable read-only memory (PROM) of the control unit Do not touch the terminals of the chip.

It does not run on leaded gasoline engine with a catalytic converter - this will lead to the rapid failure of the catalytic converter and oxygen sensors.

When working in wet weather does not allow water to electronic fuel injection system components.

The vast majority of the fuel injection system fault is caused by its failure following sensors:

- CKP - complete failure of the injection, the engine does not start;

- Absolute pressure (vacuum) in the inlet pipe - increase in fuel consumption, a significant worsening of the dynamics, problems with starting the engine;

- Throttle position - power loss, jumps and dips during acceleration, unstable work idling;

- Coolant temperature (set by the ignition coil) - difficult to start in cold weather: it is necessary to warm up the engine while maintaining the momentum of the accelerator pedal, in case of overheating is considerably reduced power, there is a detonation;

- Intake air temperature - an increase in fuel consumption, increased emissions;

- Concentration of oxygen (lambda probe) - increase in fuel consumption, reduced engine power, unstable idling. This may damage the catalytic converter;

- Speed (mounted on the gearbox) - possibly worsening the dynamic qualities of the car and increase fuel consumption.