The EFI system uses various sensors to detect the engine condition and vehicle running condition. And the engine ECU calculates at the optimum fuel injection volume, and causes the injectors to inject Read more Gasoline Engine EFI (Electronic Fuel Injection) Fuel System
Monthly Archives: October 2010
Gasoline Engine Communication Signals 2 of 2
1. Stop lamp switch
The signal from the stop lamp switch is used to detect brake operation. The STP signal voltage is the same as the voltage supplied to the stop lamp as shown in the illustration.
Gasoline Engine Communication Signals 1 0f 2
The communication signals are sent among different ECUs and are used to make operational adjustments for each other.
1. TRC (Traction Control) system communication signal
The throttle opening (VTA1 and Read more Gasoline Engine Communication Signals 1 0f 2
Gasoline EngineKnock Sensor andSTA (Starter) signal
The knock sensor is attached to the cylinder block, and sends a KNK signal to the engine ECU when engine knocking is detected. The engine ECU receives the KNK signal and retards the ignition timing to Read more Gasoline EngineKnock Sensor andSTA (Starter) signal
Diesel Engine Vehicle Speed Sensor
Click on the bulb mark or the underlined sentence.
The speed sensor detects the actual speed at which the vehicle is running. The sensor outputs the SPD signal, and the engine ECU uses this signal mainly Read more Diesel Engine Vehicle Speed Sensor
Gasoline Engine Air-fuel (A/F) Ratio Sensor
As with the oxygen sensor, the air-fuel ratio sensor detects the oxygen concentration in the exhaust gas. Conventional oxygen sensors are such that the output voltage tends to change drastically at the Read more Gasoline Engine Air-fuel (A/F) Ratio Sensor
Gasoline Engine Oxygen Sensor (O2 Sensor)
To maximum the exhaust purification function of the engine with TWC (Three-Way Catalytic Converter), the air-fuel ratio must be kept within a narrow range around the theoretical air-fuel ratio. The oxygen Read more Gasoline Engine Oxygen Sensor (O2 Sensor)
Gasoline Engine Water Temperature Sensor/ Intake Air Temperature Sensor
The water temperature sensor and intake air temperature sensor have builtin thermistors for which the lower the temperature, the larger the resistance value and, conversely, the higher the temperature, Read more Gasoline Engine Water Temperature Sensor/ Intake Air Temperature Sensor
What is G and NE Signal Generators?
The G signal and NE signal are generated by the pickup coil, in which the camshaft position sensor or crankshaft position sensor, and the signal plate or the timing rotor. The information from these two Read more What is G and NE Signal Generators?
Gasoline Engine Accelerator Pedal Position Sensor
The accelerator pedal position sensor converts the amount that the accelerator pedal is depressed (angle) to an electrical signal that is sent to the engine ECU. In addition, to ensure reliability, this Read more Gasoline Engine Accelerator Pedal Position Sensor