Pinout Values and Diagnostic Parameters

1UR-FSE ENGINE CONTROL SYSTEM: SFI SYSTEM: 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 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









2. WAVEFORM 2









HINT
The wavelength becomes shorter as the engine speed increases.

3. WAVEFORM 3









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

4. WAVEFORM 4









HINT
The wavelength becomes shorter as the engine speed increases.

5. WAVEFORM 5









HINT
The wavelength becomes shorter as the engine speed increases.

6. WAVEFORM 6









HINT
* The wavelength becomes shorter as the engine speed increases.
* The waveforms and amplitudes displayed differ slightly depending on the vehicle.
7. WAVEFORM 7









HINT
The wavelength becomes shorter as the engine speed increases.

8. WAVEFORM 8









HINT
The wavelength becomes shorter as the engine speed increases.

9. WAVEFORM 9









HINT
The wavelength becomes shorter as the engine speed increases.

10. WAVEFORM 10









HINT
The wavelength becomes shorter as the engine speed increases.

11. WAVEFORM 11









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

12. WAVEFORM 12









HINT
The wavelength becomes shorter as the vehicle speed increases.

13. WAVEFORM 13









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

14. WAVEFORM 14









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

15. WAVEFORM 15









HINT
The wavelength becomes shorter as the engine speed increases.

16. WAVEFORM 16









17. WAVEFORM 17









18. WAVEFORM 18









HINT
The waveform varies depending on the CAN communication signal.

19. WAVEFORM 19









HINT
The waveform varies depending on the CAN communication signal.

20. WAVEFORM 20









21. WAVEFORM 21









HINT
The wavelength becomes shorter as the engine speed increases.

22. WAVEFORM 22









HINT
The wavelength becomes shorter as the engine speed increases.

23. WAVEFORM 23









HINT
The wavelength becomes shorter as the engine speed increases.