General description of the Toyota diesel electronic control system The diesel electronic control system reduces fuel consumption and emissions of toxic components with exhaust gases (OG), improve the quality of speed control (accuracy, smoothness and speed), in particular, increase the...
Control System Precautions 1. When working on the fuel system, disconnect the battery. Note: when the battery is disconnected, the fault codes in the diagnostic unit are erased. Read the codes first. 2. Do not use open flame. 3. Do not allow...
System self-diagnosis 1. The diesel electronic control unit provides system self-diagnosis. 2. If a malfunction is detected on the instrument panel, the control lamp lights up, and the electronic control unit enters the mode "drive home",...
Regulation of the amount of fuel supply The base value of the amount of fuel injected into the engine cylinders (cyclic feed) calculated by the electronic control unit based on the deviation of the actual engine speed, determined by the speed sensor signal,...
Injection advance control The injection advance angle is controlled as follows: the solenoid valve changes the fuel pressure of the booster pump in the working chamber of the hydraulic piston cam drive according to the signals from the control...
Electronic control of exhaust gas recirculation An EGR valve is installed between the intake and exhaust manifolds. The position of the valve changes the resistance of the channel that communicates the intake and exhaust manifolds. The valve has a single pneumatic...
Engine settings necessary to adjust the engine. to warm it up to operating temperature. Automatic box in position "N". The air filter is installed and in good condition. All accessories and air conditioning are turned off. All vacuum...
Cold start assistance system When starting the diesel engine, the glow plug preheating current is adjusted taking into account the temperature of the engine coolant. In addition, in order to reduce the pre-heating time, the surface temperature of...
Housing and throttle position sensor Throttle position sensor (THROTTLE SENSOR) is mounted on the throttle body and is rigidly connected to the throttle valve axis. Throttle Body Check 1. Remove the intake duct and throttle body. 2. Check for clearance...
Sensors, switches, relays Fuel temperature sensor Note: On some early models, the sensor is missing, a plug is installed in its place. 1. Verification A) Turn off "ignition". b) Disconnect the fuel temperature sensor connector. V) Place a...