Input Signals
- Engine coolant temp. signal circuit
The engine coolant temp. sensor detects the engine coolant temperature and has a built-in thermistor whose resistance varies according to the engine coolant temperature. The engine coolant temperature is then input into TERMINAL THW of the engine control module as a control signal.
- Intake air temp. signal circuit
The intake air temp. sensor is installed in the mass air flow meter and detects the intake air temperature, which is input to TERMINAL THA of the engine control module as a control signal.
- Oxygen sensor signal circuit
The oxygen density in the exhaust emissions is detected and is input from the heated oxygen sensors to TERMINAL OX1B of the engine control module as a control signal.
- RPM signal circuit
The engine RPM is detected by the crankshaft position sensor and the signal is input into TERMINAL NE+ of the engine control module.
- Throttle position sensor signal circuit
The throttle position sensor detects the throttle valve opening angle as a control signal, which is input into TERMINALS VTA and VTA2 of the engine control module.
- Vehicle speed signal circuit
ABS speed sensor detects vehicle speed and the speed signal is input from skid control ECU to engine control module.
- Battery signal circuit
Voltage is constantly applied to TERMINAL BATT of the engine control module. When the power SW is pushed on, the voltage for engine control module start up power supply is applied through the EFI M relay, to TERMINAL +B of the engine control module. The current from the IGN fuse flows to TERMINAL IGSW of the engine control module, and voltage is constantly applied to TERMINAL +BM.
- Intake air volume signal circuit
The intake air volume is detected by the mass air flow meter, and is input to TERMINAL VG of the engine control module as a control signal.
- Water temp. (CHS) signal circuit
The water temp. (CHS) sensor detects the water temperature (CHS) and has a built-in thermistor whose resistance varies according to the water temperature (CHS). The water temperature (CHS) is then input into TERMINAL THW2 of the engine control module as a control signal.
- Engine knock signal circuit
Engine knocking is detected by the knock sensor, and is input into TERMINAL KNK1 of the engine control module as a control signal.
- Air fuel ratio signal circuit
The air fuel ratio is detected and input into TERMINAL A1 A+ of the engine control module as a control signal.