Pinout Values and Diagnostic Parameters
3UR-FE ENGINE CONTROL: SFI SYSTEM: TERMINALS OF ECM
3UR-FE ENGINE CONTROL: SFI SYSTEM: TERMINALS OF ECM
1. CHECK ECM
ECM Connectors:
(a) Measure the voltage according to the value(s) in the table below.
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 Specified Condition column. The illustration above can be used as a reference to identify the ECM terminal locations.
Terminal:
Terminal:
Terminal:
Terminal:
Terminal:
Terminal:
Terminal:
HINT:
*: The ECM terminal voltage is constant regardless of the output voltage from the sensor.
Waveform:
(b) WAVEFORM 1:
Terminal Hint:
Waveform:
(c) WAVEFORM 2:
Terminal Hint:
HINT:
In the Data List, item O2S B1 S2 or O2S B2 S2 shows the ECM input values from the heated oxygen sensor.
Waveform:
(d) WAVEFORM 3:
Terminal Hint:
HINT:
The wavelength becomes shorter as the engine speed increases.
Waveform:
(e) WAVEFORM 4:
Terminal Hint:
HINT:
- The wavelength becomes shorter as the engine speed increases.
- The waveforms and amplitudes displayed differ slightly depending on the vehicle.
Waveform:
(f) WAVEFORM 5:
Terminal Hint:
HINT:
The wavelength becomes shorter as engine speed increases.
Waveform:
(g) WAVEFORM 6:
Terminal Hint:
HINT:
The wavelength becomes shorter as engine speed increases.
Waveform:
(h) WAVEFORM 7:
Terminal Hint:
HINT:
If the waveform is not similar to the illustration, check the waveform again after idling for 10 minutes or more.
Waveform:
(i) WAVEFORM 8:
Terminal Hint:
HINT:
The wavelength becomes shorter as the vehicle speed increases.
Waveform:
(j) WAVEFORM 9:
Terminal Hint:
HINT:
The duty ratio varies depending on the throttle actuator operation.
Waveform:
(k) WAVEFORM 10:
Terminal Hint:
HINT:
The duty ratio varies depending on the throttle actuator operation.
Waveform:
(l) WAVEFORM 11:
Terminal Hint:
HINT:
The wavelength becomes shorter as the engine speed increases.
Waveform:
(m) WAVEFORM 12:
Terminal Hint:
HINT:
The waveform varies depending on the CAN communication signal.
Waveform:
(n) WAVEFORM 13:
Terminal Hint:
HINT:
The waveform varies depending on the CAN communication signal.
Waveform:
(o) WAVEFORM 14:
Terminal Hint:
HINT:
The wavelength becomes shorter as the engine speed increases.
Waveform:
(p) WAVEFORM 15:
Terminal Hint:
HINT:
The wavelength changes when the air injection control driver detects malfunctions in the air injection system P0412.
Waveform:
(q) WAVEFORM 16:
Terminal Hint:
HINT:
The wavelength becomes shorter as engine speed increases.