Engine Control Module
2UZ-FE ENGINE CONTROL SYSTEM: SFI SYSTEM: TERMINALS OF ECM
TERMINALS OF ECM
1. 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.
Terminals Part 1:
Terminals Part 2:
Terminals Part 3:
Terminals Part 4:
Terminals Part 5:
*1: Shielded
*2: The ECM terminal voltage is constant regardless of the output voltage from the sensor.
Waveform 1:
(a) WAVEFORM 1
ECM Terminals:
HINT: The wavelength becomes shorter as engine rpm increases.
Waveform 2:
(b) WAVEFORM 2
ECM Terminals:
- The wavelength becomes shorter as engine rpm increases.
- The waveforms and amplitudes displayed differ slightly depending on the vehicle.
Waveform 3:
(c) WAVEFORM 3
ECM Terminals:
HINT: In the Data List, the items VVT OCV Duty B1 and B2 show the duty ratio of voltage flowing to the OCV (see illustration).
VVT OCV Duty B1, B2 = A/B x 100 (%)
Waveform 4:
(d) WAVEFORM 4
ECM Terminals:
HINT: The wavelength becomes shorter as engine rpm increases.
Waveform 5:
(e) WAVEFORM 5
ECM Terminals:
HINT: The wavelength becomes shorter as the engine rpm increases.
Waveform 6:
(f) WAVEFORM 6
ECM Terminals:
HINT: The wavelength becomes shorter as engine rpm increases.
Waveform 7:
(g) WAVEFORM 7
ECM Terminals:
HINT: The duty ratio varies depending on the throttle opening operation.
Waveform 8:
(h) WAVEFORM 8
ECM Terminals:
HINT: The duty ratio varies depending on the throttle opening operation.
Waveform:
(i) WAVEFORM 9
ECM Terminals:
HINT: The wavelength becomes shorter as engine rpm increases.
Waveform 10:
(j) WAVEFORM 10
ECM Terminals:
HINT: In the Data List, item O2S B1 S2 shows the ECM input values from the heated oxygen sensor.
Waveform 11:
(k) WAVEFORM 11
ECM Terminals:
HINT: The wavelength becomes shorter as engine rpm increases.