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.
System
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
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 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
Throttle Position Sensor
The throttle position sensor is installed on the throttle body. The sensor converts the throttle opening angle to voltage, which is sent to the engine ECU as the throttle opening signal (VTA). In addition, Read more Throttle Position Sensor
Manifold Pressure Sensor (Vacuum Sensor)
The manifold pressure sensor is used with D-type EFI for sensing the intake manifold pressure. This is one of the most important sensors in D-type EFI. By means of an IC built into this sensor, the manifold Read more Manifold Pressure Sensor (Vacuum Sensor)
Diesel Engine Air Flow Meter
In this system, the temperature of the hot-wire (Rh) is continuously maintained at a constant temperature higher than the temperature of the intake air by using the thermistor (Ra). Consequently, since Read more Diesel Engine Air Flow Meter
Gasoline Engine Air Flow Meter
The air flow meter is one of the most important sensors because it is used in L-type EFI to detect the intake air mass or volume. Signal of the intake air mass or volume is used to calculate the basic Read more Gasoline Engine Air Flow Meter
What is a Sensor Terminal Voltage?
The sensors convert various information into voltage change that can be detected by the engine ECU. There are many types of sensor signals, but there are five main types of methods for converting the information Read more What is a Sensor Terminal Voltage?