Basic information about the engine management system To reduce atmospheric pollution by products of incomplete combustion and ensure good handling and fuel efficiency, the car has several emission control systems (pic....
On-Board Diagnostics and Fault Codes Tools needed for troubleshooting 1. A digital multimeter is required to test items related to fuel injection and emissions control systems (pic. 2.1). A digital tester...
Electronic control unit (BEU) — removal and installation Attention! The models described in this manual are equipped with airbags. When working in the cushion area, always turn them off ( see chapter 12 ) to avoid accidental...
Throttle position sensor — check, adjust and replace Examination 1. The throttle position sensor is mounted on the throttle body and attached to the throttle shaft. In accordance with the angle of rotation of the damper,...
Mass Air Flow Sensor — Check and Replace 1. The air flow sensor is located in the inlet air duct. The sensor, depending on the model, has a hot wire transducer or a damper with a potentiometer. The sensor...
Inlet air temperature sensor — check and replace Examination 1. The air temperature sensor is a thermistor that changes its resistance depending on the temperature. When the resistance of the thermistor changes, the...
Coolant temperature sensor — check and replace Examination 1. The coolant temperature sensor is a thermistor that changes its resistance depending on temperature. When the resistance of the thermistor changes, the...
Crankshaft position sensor — check and replace Examination 1. The crankshaft position sensor determines the moment and order of fuel injection and ignition in the engine cylinders. The same sensor also measures the...
Camshaft Position Sensor — Check and Replace Release models from 1993 to 1997 Examination 1. The sensor on the married camshaft determines the order of fuel injection into the cylinders. On release models from 1993...
Steering hydraulic pressure sensor — check and replace Examination 1. The power steering hydraulic pressure switch is located on the hydraulic pump. When the pressure in the hydraulic system reaches a preset value, the...
Oxygen sensor (O2S) — check and replace Examination 1. An oxygen sensor monitors the oxygen content in the exhaust stream. The oxygen contained in the exhaust gases reacts with the sensor, which leads to a...
Knock sensor — check and replace Examination 1. Knock sensors detect abnormal engine vibration. The engine management system is programmed to control the ignition timing in such a way that the engine...
Vehicle speed sensor — check and replace 1. The vehicle speed sensor is located on the transmission. This is a permanent magnet inductive sensor that, when the car is moving, produces an alternating voltage at...
Idle control valve — check and replace Examination Attention! When performing checks with the engine off, keep hands, clothes, hair, etc. away from rotating parts. 1. Engine idle speed is controlled by the...
Intake configuration control system (with V-engine) 1. Three air dampers are installed in the intake tract of the engine, which control the configuration of the tract. The variable configuration intake tract is designed...
Forced crankcase ventilation system 1. Crankcase ventilation system (pic. 16.1) reduces emissions of hydrocarbons into the atmosphere by directing crankcase gases for afterburning into the combustion...
Exhaust gas recirculation system General information 1. The recirculation system reduces the content of nitrogen oxides in the exhaust gases, directing them into the intake manifold for afterburning in...
Evaporative emission system General information 1. The evaporative emission system absorbs fuel vapors so that they do not enter the atmosphere, and at the right moment when the engine is running,...
Brake pedal sensor — check and replace Examination 1. Brake pedal sensor (it's the brake light switch) informs the BEU that the vehicle is in braking mode. When braking, the sensor contacts close, and when...
Catalytic Converter — Check and Replace Note. The catalytic converter may have an extended warranty that is different from the vehicle warranty. Before changing the converter at your own expense, consult your...