Engine management system car Toyota Land Cruiser 70

General description of the electronic control system of Toyota diesel engines
The electronic diesel control system allows to reduce fuel consumption and emissions of toxic components with exhaust gases (EG), and improve the quality of speed control (precision, smoothness and speed), in...

Precautions when working with the control system
1. When working on the fuel system, disconnect the battery. Note: Disconnecting the battery will erase the fault codes in the diagnostic unit. Read the codes first. 2. Do not use open flame. 3. Do not allow diesel fuel...

System self-diagnosis
1. The diesel electronic control unit provides self-diagnosis of the system. 2. When a malfunction is detected, a warning light comes on on the instrument panel and the electronic control unit switches to the "drive...

Regulation of the amount of fuel supplied
The basic value of the amount of fuel injected into the engine cylinders (cyclic feed) is calculated by the electronic control unit based on the deviation of the actual engine speed, determined by the speed sensor...

Injection advance angle adjustment
The injection advance angle is adjusted as follows: the electromagnetic valve changes the fuel pressure of the booster pump in the working chamber of the hydraulic piston drive of the cam washer according to the signals...

Electronic control of air supply to the intake manifold during warm-up and idle mode
At the inlet to the intake manifold, parallel to the throttle valve, driven by the accelerator pedal, there is an additional air supply valve. The additional air supply control valve is installed in the throttle valve...

Electronic exhaust gas recirculation control
An exhaust gas recirculation control valve is installed between the intake and exhaust manifolds. The valve position changes the resistance of the channel connecting the intake and exhaust manifolds. The valve has a...

Engine adjustments
To adjust the engine, it is necessary that it is warmed up to operating temperature. Automatic transmission in position "N". Air filter is installed and in good condition. All auxiliary equipment and air conditioning...

Cold Start Assist System
When starting the diesel engine, the pre-heating current of the glow plugs is adjusted taking into account the engine coolant temperature. In addition, to reduce the pre-heating time, the surface temperature of the glow...

Throttle position sensor and housing
Throttle Position Sensor (THROTTLE SENSOR) is installed on the throttle body and is rigidly connected to the throttle axis. Checking the throttle body 1. Remove the intake air duct and throttle body. 2. Check that there...

Sensors, switches, relays
Fuel temperature sensor Note: On some early models the sensor is missing and a plug is installed in its place. 1. Verification a) Turn off the ignition. b) Disconnect the fuel temperature sensor connector. c) Place a...

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