Terminals of ECM

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

TERMINALS OF ECM





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

















1. WAVEFORM 1





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





2. WAVEFORM 2










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





3. WAVEFORM 3










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





4. WAVEFORM 4





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





5. WAVEFORM 5





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





6. WAVEFORM 6





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





7. WAVEFORM 7





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





8. WAVEFORM 8





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





9. WAVEFORM 9





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





10. WAVEFORM 10





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





11. WAVEFORM 11





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





12. WAVEFORM 12





HINT: The waveform varies depending on the CAN communication signal.





13. WAVEFORM 13





HINT: The waveform varies depending on the CAN communication signal.