Pinout Values and Diagnostic Parameters

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

TERMINALS OF ECM

1. 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.





















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





(a) WAVEFORM 1





HINT: The wavelength becomes shorter as engine rpm increases.





(b) WAVEFORM 2





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





(c) WAVEFORM 3









(d) WAVEFORM 4





HINT: The wavelength becomes shorter as engine rpm increases.





(e) WAVEFORM 5





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





(f) WAVEFORM 6





HINT: The wavelength becomes shorter as engine rpm increases.





(g) WAVEFORM 7





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





(h) WAVEFORM 8





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





(i) WAVEFORM 9





HINT: The wavelength becomes shorter as engine rpm increases.





(j) WAVEFORM 10





HINT: In the Data List, item O2S B1 S2 or O2S B2 S2 shows the ECM input values from the heated oxygen sensor.





(k) WAVEFORM 11





HINT: The wavelength becomes shorter as engine rpm increases.