Engine Control System - SFI System

2GR-FSE ENGINE CONTROL SYSTEM: SFI SYSTEM: TERMINALS OF ECM





NOTICE:
* The ECM has waterproof connectors. Therefore, voltage or waveforms cannot be checked with the connectors connected to the vehicle.
* The standard normal voltage (reference values) 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 terminals, displayed in the Specified Condition column. The illustration above can be used as a reference to identify the ECM terminal locations.


























HINT
*: The ECM terminal voltage is constant regardless of the output voltage from the sensor.

1. WAVEFORM 1









HINT
The wavelength becomes shorter as the engine rpm increases.

2. WAVEFORM 2









HINT
In Data List, item O2S B1S2, O2S B2S2 shows the ECM input values from the heated oxygen sensor.

3. WAVEFORM 3









HINT
* The wavelength becomes shorter as the engine rpm increases.
* When the direct injection injectors are operating, Direct is displayed for Injection Way of the Data List.
4. WAVEFORM 4









HINT
* The wavelength becomes shorter as the engine rpm increases.
* The waveforms and amplitudes displayed differ slightly depending on the vehicle.
5. WAVEFORM 5









HINT
The wavelength becomes shorter as the engine rpm increases.

6. WAVEFORM 6









HINT
The wavelength becomes shorter as the engine rpm increases.

7. WAVEFORM 7









HINT
The wavelength becomes shorter as the engine rpm increases.

8. WAVEFORM 8









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

9. WAVEFORM 9









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

10. WAVEFORM 10









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

11. WAVEFORM 11









HINT
The wavelength becomes shorter as the engine rpm increases.

12. WAVEFORM 12









HINT
* The wavelength becomes shorter as the engine rpm increases.
* When the direct injection injectors are operating, Direct is displayed for Injection Way of the Data List.
13. WAVEFORM 13









14. WAVEFORM 14









HINT
The waveform varies depending on the CAN communication signal.

15. WAVEFORM 15









HINT
The waveform varies depending on the CAN communication signal.

16. WAVEFORM 16









HINT
* The wavelength becomes shorter as the engine rpm increases.
* When the port injection injectors are operating, Port is displayed for Injection Way of the Data List.
17. WAVEFORM 17









18. WAVEFORM 18









HINT
The wavelength becomes shorter as the engine rpm increases.

19. WAVEFORM 19









HINT
The wavelength becomes shorter as the engine rpm increases.