Visually check that the air filter is not excessively contaminated with dirt or oil.

Inspect the vehicle ECM using check mode. Intermittent problems are easier to detect with the intelligent tester when the ECM is in check mode. In check mode, the ECM uses 1 trip detection logic, which is more sensitive to malfunctions than normal mode (default), which uses 2 trip detection logic.

Refer to the check mode procedure ().

The ECM controls the fuel injection system by using the fuel injectors and fuel supply pump. The ECM regulates the fuel injection volume and fuel injection timing by controlling the duration and timing of the electric current provided to the solenoid valve in the fuel injector. The ECM regulates injection pressure by controlling the suction control valve located in the fuel supply pump.
The feed pump is used to pump fuel from the fuel tank to the fuel supply pump.

Land Cruiser URJ200 URJ202 GRJ200 VDJ200 1VD-FTV ENGINE CONTROL

Land Cruiser URJ200 URJ202 GRJ200 VDJ200 1VD-FTV ENGINE CONTROL

Each fuel injector has different fuel injection characteristics. In order to optimize fuel injection performance, the ECM compensates for these differences by adjusting the fuel injection duration of each fuel injector according to its compensation code. Fuel injector compensation codes are unique, 30 digit, alphanumeric values printed on the head portion of each fuel injector.

The MIL (Malfunction Indicator Lamp) is used to indicate vehicle malfunctions detected by the ECM. When the engine switch is turned on (IG), power is supplied to the MIL circuit, and the ECM provides the circuit ground which illuminates the MIL.

When the vehicle is being driven with the accelerator pedal depressed, depressing the brake pedal without releasing the accelerator pedal will activate the brake override system to restrict driving torque. The conditions for activating the brake override system as well as the items that are controlled are explained below.

The injector driver drives the injectors at high speeds with a high-voltage DC/DC converter. The ECM constantly monitors the injector driver and stops the engine if an abnormal condition is detected.