System description Thanks to the integrated electronic engine management system (ECCS) control of ignition advance, fuel injection, speed control x.x. etc. carried out from one central...
Possible causes of malfunctions Controls, sensors and actuators Listed below are the main sensors and actuators that are associated with the ECCS controls.
Emergency operation of the control unit When the emergency operation of the control unit is activated as a result of damage to the main sensors, the control is carried out according to a predetermined program,...
Self-diagnosis function General description If, during self-diagnosis, malfunctions are detected in the main sensors necessary for the operation of the ECCS unit, fault codes are recorded in...
Idle speed check Standard rpm x.x. (after warming up) Checking the speed x.x. Make sure that all loads are disconnected from the engine: air conditioning, power steering pump and various...
Checking and adjusting the ignition timing Use a current loop to connect a stroboscope to the primary circuit of the cylinder #1 ignition coil. (If using a conventional strobe, install the sensor on the high...
Checking the concentration of CO and HC Because the vehicle uses a wide range feedback air-fuel ratio learning function, CO and HC adjustments are not required. Warm up the engine for 10 minutes. and making...
Fuel pressure check Simple check Pinch the fuel hose with your fingers, make sure that pulsations are felt during pump operation. Checking with a fuel gauge Relieve fuel pressure Remove the...
Checking the fuel cut function Warm up the engine. Disconnect the wiring connector from the injector and connect a test lamp. When the engine speed reaches 4000 rpm, release the accelerator pedal and...
Standard input/output voltages of the ECCS control unit Wiring diagram Pin assignment of the ECCS control unit connector () The names of the signals are indicated on the contacts of the diagnostic connector (SR motors do not...
Control unit — removal and installation 1. Remove the glove box and lower section of the instrument panel on the passenger side, see Sec. Salon equipment . 2. Remove the 3 fixing nuts of the ECCS control unit...
Crank angle sensor (integrated in distributor) Examination Remove the distributor from the engine (leave the plug connected). Turn the ignition key to position «ON». Slowly turn the crankshaft angle sensor shaft by...
Air flow weight sensor Examination Remove the sensor (without unplugging). Blow air from the air cleaner side (ignition key in the ON position) and check the change in output voltage between...
Coolant temperature sensor Check the resistance between pins #1 and #2 of the engine coolant temperature sensor. Resistance: At cool temperature engine fluid approx. 20°C: approx. 2.5 kN At cool...
Oxygen sensor Removing 1. Disconnect the wiring connector. 2. Unscrew the sensor with a wrench (special tool).
Knock sensor — removal 1. Turn off a fixing bolt of the gauge of a detonation from below the car. 2. Disconnect the connector and remove the knock sensor. Installation is carried out with the...
Throttle sensor Removing 1. Remove the air duct and air cleaner housing. 2. Disconnect the wiring connector. 3. Remove the sensor and throttle switches. Installation is carried out with...
Ignition lock — check Using a tester, check the continuity between the contacts in all positions of the ignition switch.
Refrigerant pressure sensor Examination Verify that the output voltage increases with increasing refrigerant pressure. Removing See ch. Heater and air conditioner.
Steering hydraulic switch Examination Start the engine. Disconnect the hydraulic switch wiring connector. Check the continuity between contacts 1-2 of the hydraulic switch. Steering wheel does...
Injectors — check Check the resistance between tracks 1 and 2 of the fuel injectors of each cylinder. Resistance (for all cylinders): Approx. 14.5Σ (at room temperature) Removing nozzles...
Power transistor (built into the distributor) — check If the waveform from the transistor measured by the oscilloscope is abnormal, use an analog tester to check the resistance between the corresponding transistor pins by...
EGR valve — check and removal Examination Check the resistance between tracks 1-2, 2-3, 4-5, 5-6 of the valve. Resistance: Approx. 22 kΣ (at 20°C) Removing 1. Remove the EGR pipe. 2. Disconnect the...
ACC valve — check and removal Examination Check the resistance between tracks 1-2, 2-3, 4-5, 5-6 of the valve. Resistance: approx. 27-33 kΣ (at 20°C) Removing 1. Remove the throttle body. 2. Remove...
Fuel pump — check and removal Examination Check the resistance between tracks 1-3 of the fuel pump. Resistance: Approx. 1Ω (at room temperature). Removing See ch. Accelerator, fuel system and exhaust...
Oxygen Sensor Heating Element Examination Check the resistance between pins #1 and #3 of the sensor. Resistance: Approx. 4.00 (at room temperature) Removing See above section « oxygen sensor ».
Radiator Fans — Check Disconnect the connector from the coolant temperature sensor and start the engine. The fans must be running.
Carbon filter purge control valve — check and remove Examination Check the resistance between contacts 1-2 of the valve. Resistance: Approx. 32 Σ (at 20°C) Check the continuity between channels A and B using a manual...
Relay location The ECCS relay and ignition coils, fuel pump relay, radiator fan relay and A/C relay are located in the relay box in the engine compartment.
Checking the evaporative emission system (EVAP) Canister with charcoal filter Visually inspect for cracks or damage. Plug port C with your finger, use a hand pump to apply vacuum through port A and check that there is...
Checking the forced crankcase ventilation system Crankcase ventilation valve Examination While the engine is running at idle speed, disconnect the hose from the crankcase ventilation valve. If the valve is working...