Terminals of ECM

2TR-FE ENGINE CONTROL SYSTEM: SFI SYSTEM: TERMINALS OF ECM

TERMINALS OF ECM





HINT: The standard normal voltage between each pair of ECM terminals is shown in the table below. The appropriate conditions for checking each pair of terminals are also indicated. The result of checks should be compared with the standard normal voltage for that pair of terminals, displayed in the STD Voltage column. The illustration above can be used as a reference to identify the ECM terminal locations.





















*1: The ECM terminal voltage is constant regardless of the output voltage from the sensor.
*2: Only for the vehicle equipped with VSC (Testing and Inspection).





1. WAVEFORM 1
Fuel injector





HINT: The wavelength becomes shorter as the engine rpm increases.





2. WAVEFORM 2
(a) Igniter IGT signal (from ECM to igniter)
(b) Igniter IGF signal (from igniter to ECM)





HINT: The wavelength becomes shorter as the engine rpm increases.





3. WAVEFORM 3
(a) Camshaft position sensor
(b) Crankshaft position sensor





HINT: The wavelength becomes shorter as the engine rpm increases.





4. WAVEFORM 4
Throttle actuator positive terminal





HINT: The duty ratio varies depending on the throttle actuator operation.





5. WAVEFORM 5
Throttle actuator negative terminal





HINT: The duty ratio varies depending on the throttle actuator operation.





6. WAVEFORM 6
Heated oxygen sensor





HINT: In the DATA LIST, item O2S B1S2 shows the ECM input values from the heated oxygen sensor.





7. WAVEFORM 7
Knock sensor





- The wavelength becomes shorter as the engine rpm increases.
- The waveforms and amplitudes displayed differ slightly depending on the vehicle.





8. WAVEFORM 8
Camshaft timing oil control valve (OCV)





HINT: The wavelength becomes shorter as the engine rpm increases.





9. WAVEFORM 9
Purge VSV





HINT: If the waveform is not similar to the illustration, check the waveform again after idling for 10 minutes or more.





10. WAVEFORM 10
Engine speed signal





HINT: The wavelength becomes shorter as the engine rpm increases.





11. WAVEFORM 11
Vehicle speed signal





HINT: The wavelength becomes shorter as the vehicle speed increases.





12. WAVEFORM 12
Airbag sensor assembly









13. WAVEFORM 13
CAN communication signal (reference)









14. WAVEFORM 14
CAN communication signal (reference)









15. WAVEFORM 15
Terminal DI of air injection control driver





HINT: The wavelength changes when the air injection control driver detects malfunctions in the air injection system (P0412).