In order to detect abnormality in the DPNR (*3) catalytic converter, the ECM monitors an exhaust gas temperature as well as a differential pressure of the exhaust gas. For monitoring the differential pressure, the ECM compares the up-and downstream pressure of the DPNR catalytic converter. If the difference between the pressure is large, the ECM determines that the DPNR has become contaminated or is deteriorated, and illuminates the MIL.

The throttle position sensor is mounted on the diesel throttle body and detects the opening angle of the throttle valve. This sensor is an electronic sensor and uses Hall-effect elements.

The ECM determines the vehicle's driving conditions from the signals input to its VLU terminal. The data is one of the inputs used for EGR control, etc.

The ECM reduces injector operation speed and applied voltage to the injector to reduce the sound it produces during idling. To do this, the ECM outputs applied voltage switching signals to terminal IJEN of the EDU from terminal IDLO of the ECM.

A thermistor is built into the Engine Coolant Temperature (ECT) sensor and it changes its resistance value according to the engine coolant temperature.

The structure of the sensor and connection to the ECM is the same as the intake air temperature sensor.

The ECM determines the battery level according to the voltage of the BATT terminal while the engine is running (not cranking).

Connect the intelligent tester to the DLC3.

A thermistor is built into the Engine Coolant Temperature (ECT) sensor and it changes its resistance value according to the engine coolant temperature.

The structure of the sensor and connection to the ECM is the same as the intake air temperature sensor.

The battery current sensor installed on the positive battery terminal detects the amount of current supplied from the alternator.

The intake air temperature sensor is built into the mass air flow meter and senses the intake air temperature.

A thermistor built in the sensor changes its resistance value according to the intake air temperature.

The fuel route switching valve changes the route of fuel discharged from the fuel pump to switch between the fuel transfer operation and priming operation.