Terminals of ECM
1GR-FE ENGINE CONTROL SYSTEM: SFI SYSTEM: TERMINALS OF ECM
1GR-FE ENGINE CONTROL SYSTEM: SFI SYSTEM: 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 Specified Condition column. The illustration above can be used as a reference to identify the ECM terminal locations.
HINT: *1: 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 the Data List, item O2S B1 S2 or O2S B2 S2 shows the ECM input values from the heated oxygen sensor.
3. WAVEFORM 3
HINT: The wavelength becomes shorter as the engine rpm increases.
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
(a) VVT sensor
(b) Crankshaft position sensor
HINT: The wavelength becomes shorter as the engine rpm increases.
6. WAVEFORM 6
(a) Igniter IGT signal (from ECM to igniter)
(b) Igniter IGF signal (from igniter to ECM)
HINT: The wavelength becomes shorter as the engine rpm increases.
7. WAVEFORM 7
HINT: If the waveform is not similar to the illustration, check the waveform again after idling for 10 minutes or more.
8. WAVEFORM 8
HINT: The wavelength becomes shorter as the vehicle speed increases.
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
