Fuel system Fuel is supplied by the fuel pump through the fuel filter to each injector under pressure set by the fuel pressure regulator. The fuel pressure regulator provides a fuel pressure differential between the fuel and intake...
Air supply system The air supply system provides the supply of the amount of air necessary for the operation of the engine. The amount of air entering the engine is determined by the throttle opening angle and the engine speed. The air...
Electronic control system All engines are equipped with a TOYOTA electronic control system that controls fuel injection, ignition timing, idle speed, diagnostic system, etc. using an electronic control unit using a microcomputer. The following...
Electrical Maintenance Precautions 1. Check the correct motor settings (see chapter " Maintenance and general inspection and adjustment procedures "). 2. Precautions when connecting appliances. A) Use the rechargeable battery as a power source for the...
Precautions for Cars with a Mobile Radio System Structurally, the electronic control unit is designed in such a way as to exclude the influence of external electromagnetic interference on it. However, if the vehicle is equipped with a CB radio, etc. (even with an...
Precautions when working with the air supply system 1. Removing the oil dipstick, oil filler cap, hoses, etc. from the engine. may cause engine misalignment. 2. Disconnection, loosening of fasteners or cracking of elements of the air supply system (between throttle body...
Precautions when working with an electronic control system 1. Before disconnecting the electrical connectors of the electronic control unit, it is necessary to turn off the electrical power by either the ignition key or by removing the terminals from the battery. Warning: Be...
Precautions when working with the fuel system 1. Before working on the fuel system, disconnect the negative cable from the battery. Attention: any diagnostic code in the memory device of the electronic control unit is erased when removed (-) negative terminal from...
Diagnostic system — description The electronic control unit has a built-in current self-diagnosis system, which continuously monitors the engine condition based on sensor signals. If a malfunction is detected, this system identifies it and informs the...
Engine Malfunction Indicator Lamp («CHECK») 1. Indicator lamp "CHECK" - a warning light signal, which is a light board on the instrument panel, lights up when the ignition is on and the engine is not running. 2. After starting the engine, the scoreboard "CHECK"...
Output of diagnostic codes Attention. When diagnosing, two main modes are used: current self-diagnosis and testing. Current self-diagnosis mode To obtain an output diagnostic code, perform the following procedures. 1. Check the initial...
Diagnostic indication 1. If 2 or more types of faults appear at the same time, then the code with the smallest number is displayed first, and then as the numbers increase. 2. All fault codes recorded in the driving cycle, except for those...
Erasing a diagnostic code 1. After repair of a faulty node, the diagnostic code is stored in the memory of the electronic control unit. So it must be removed (erased) by disconnecting the fuse "EFI" (with the ignition off). Shutdown time (at...
Checking the diagnostic system circuit Troubleshooting with a volt/ohmmeter Attention: - Troubleshooting procedures have been developed for each system and are described in this manual. These procedures may change slightly from time to time. However, the...
Checking the elements of the injection system using an oscilloscope Note: Below are the correct waveforms for various motors. №10-20-Е1 (5A-FE, 4S-FE) Division value: X - 20 ms, Y - 20 V. Mode: idle. №10-20-Е1 (4A-FE, 3S-FE) Division value: X - 20 ms, Y - 20 V. Mode: idle. №10-40-Е1...
Removal and installation of the fuel pump Attention: when performing work on removing and installing fuel system components, disconnect the fuel pump connector in the luggage compartment as shown in the figure. Removing Precautions: Do not smoke or use open...
Fuel pump — check on the engine Check the operation of the fuel pump. Short the terminals with a jumper "+V" And "FP" diagnostic socket. b) Turn on the ignition Attention: do not start the engine. V) Check for fuel pressure in the hose coming from the...
Dismantling and assembly of the fuel pump Disassembly 1. Remove the fuel pump from the bracket. A) Disconnect the fuel pump harness from the connector. b) Remove the bottom of the fuel pump from the bracket. V) Remove the rubber buffer from the fuel pump. G)...
Fuel pump check 1. Check up resistance of a winding of the fuel pump. Use an ohmmeter to measure the resistance between the pump leads. Rated resistance - 0.2-3.0 Ohm If the resistance is out of range, replace the fuel pump. 2. Check...
Fuel pressure control Serie A 1 - fuel return hose, 2 - vacuum hose, 3 - fuel pressure regulator, 4 - ring seal. 3S-FE, 4S-FE 1 - vacuum hose, 2 - fuel pressure regulator, 3 - ring seal, 4 - gasket on the engine Check on the engine Check...
Removal and installation of the fuel tank 1 - service hatch cover, 2 - fuel pump assembly, 3 - gasket, 4 - fuel tank assembly, 5 - hose of the fuel vapor recovery system, 6 - fuel hose (filling tube), 7 - filling hose, 8 - lower protection of the fuel tank, 9 -...
Fuel filter 4A-FE, 5A-FE 1 - inlet fuel hose, 2 - gasket, 3 - fuel filter. 7A-FE 1 - inlet fuel hose, 2 - fuel filter, 3 - air filter cover with air duct, 4 - gasket. 3S-FE, 4S-FE 1 - air filter cover with air duct, 2 - ABS...
Injectors — checking on the engine 1. Check the performance of the nozzles by ear. A) With the engine running or when turning it over with a starter, use a phonendoscope to make sure by ear (sound of injected fuel) in the performance of the injectors,...
Removal and installation of nozzles Removal and installation of nozzles (5A-FE) 1 - rear seat cushion, 2 - fuel pump connector, 3 - air filter cover with air duct, 4 - intake air temperature sensor connector, 5 - vacuum hose (fuel vapor accumulator), 6 -...
Checking the injectors 1. Inspect the nozzles, use a match to check for dirt on the inlet mesh, if there is, blow it out with air. 2. Check the quality of the injection nozzles. Note: Avoid sparks during testing. Keep a fire extinguisher...
Installation of nozzles 1. Install injectors and fuel manifold. A) Install a new sealing sleeve on the injector (if filmed). b) Apply a thin layer of fuel (lithol) on a new O-ring and install it on the injector. V) Rotate the injectors and...
Removal and installation of the throttle body Series A 1. Disconnect (-) wire from the negative battery terminal. 2. Drain the engine coolant. 3. Disconnect the accelerator cable. 4. (Models with automatic transmission) Disconnect the throttle control cable. Note:...
Throttle Body Disassembly Series A 1. Remove the idle speed control valve by unscrewing the 4 mounting screws. 2. Remove the throttle position sensor by unscrewing the 2 mounting screws. 3S-FE, 4S-FE 1. Remove the idle speed control valve by...
Throttle position sensor test Series A 1. Check throttle position sensor. a) (4A-FE with automatic transmission) Apply vacuum to the throttle damper. b) Insert a 0.4 or 0.9 mm thick feeler gauge between the throttle stop adjusting screw and lever....
Installing and adjusting the throttle position sensor Series A 1. Set the throttle to the fully closed position. 2. Install the sensor in the position shown in the figure (90°counterclockwise from original position), insert it into the throttle body, then turn it clockwise...
Throttle body device Serie A 5A-FE, 7A-FE 4A-FE 1 - vacuum hose of the fuel vapor accumulator, 2 - vacuum hose, 3 - throttle body, 4 - throttle position sensor, 5 - throttle position sensor connector, 6 - intake air temperature sensor...
Valve of the idling speed control system Vehicle check 1. Check the resistance of the valve winding. A) Disconnect the valve connector. b) Using an ohmmeter, measure the resistance between the terminal "+V" and conclusions "ISC1", "ISC2" connector. Rated...
Main relay of the fuel injection system Schemes for switching on the main relay of the injection system 1 - battery, 2 - main fusible insert 2.0L, 3 - fusible insert AM2 (ZOA), 4 - ignition lock, 5 - EFI fuse (15A), 6 - JGN fuse (7.5A), 7 - the main relay of...
Location of electronic control system components Serie A 1 - coolant temperature sensor, 2 - coolant temperature sensor, 3 - nozzles, 4 - valve of the frequency control system, 5 - absolute pressure sensor in the intake manifold, 6 - throttle position sensor, 7 -...
Fuel pump relay switch 1. Remove the fuel pump relay switch. 2. Check the electrical circuit of the relay using an ohmmeter. Measure the resistance between the terminals of the fuel pump relay switch. If these conditions are not met, replace...
Coolant temperature sensor and intake air temperature sensor Checking the coolant temperature and intake air temperature sensors 1. To remove the coolant temperature sensor, drain the coolant. 2. Remove the sensor, disconnect the connector. 3. Using an ohmmeter, measure the...
Manifold absolute pressure sensor 1. Check the supply voltage of the absolute pressure sensor in the intake manifold. A) Disconnect the sensor connector. b) Turn on the ignition. V) Using a voltmeter, measure the voltage between the terminals of the...
Checking the knock sensor 1. Disconnect a wire from the negative plug of the storage battery. 2. Remove the knock sensor by first disconnecting the sensor connectors. 3. Using an ohmmeter, verify that there is no continuity between the sensor...
Electropneumatic valve of the fuel vapor recovery system Checking the electro-pneumatic valve 1. Remove the electro-pneumatic valve. 2. Using an ohmmeter, verify that there is no open circuit in the valve winding by measuring its electrical resistance. Rated resistance (at...
Oxygen sensor 1. Warm up the engine to normal operating temperature. 2. Measure the oxygen sensor feedback voltage. A) Connect the positive lead of the voltmeter to the "VF1" diagnostic connector, and the negative terminal to the...