Pinout Values and Diagnostic Parameters

3UZ-FE ENGINE CONTROL SYSTEM: SFI SYSTEM: TERMINALS OF ECM





HINT
The standard 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 voltage for that pair of the terminals, and displayed in the "Specified Conditions" column. The illustration above can be used as a reference to identify the ECM terminal locations.





















1. WAVEFORM 1





* Fuel injector





HINT
The wavelength becomes shorter as engine rpm increases.

2. WAVEFORM 2





* (a) Igniter IGT signal (from ECM to igniter)

* (b) Igniter IGF signal (from igniter to ECM)





HINT
The wavelength becomes shorter as engine rpm increases.

3. WAVEFORM 3





* (a) Camshaft position sensor

* (b) Crankshaft position sensor





HINT
The wavelength becomes shorter as engine rpm increases.

4. WAVEFORM 4





* Purge VSV





HINT
In cases where the purge VSV can be used to purge the EVAP, the waveform will not be displayed as shown in the illustration. In the Data List, the item EVAP (Purge) VSV shows the duty ratio of voltage flowing to the purge valve.

Duty ratio for purge VSV (%) = A/B x 100

5. WAVEFORM 5





* Heated oxygen sensor (sensor 1)





HINT
In the Data List, the items O2S B1S1 and O2S B2S1 show the ECM input values of the heated oxygen sensor (sensor 1).

6. WAVEFORM 6





* Heated oxygen sensor (sensor 2)





HINT
In the Data List, the items O2S B1S2 and O2S B2S2 show the ECM input values of the heated oxygen sensor (sensor 2).

7. WAVEFORM 7





* Knock sensor





HINT
* The wavelength becomes shorter as engine rpm increases.
* The waveforms and amplitude displayed differ slightly depending on the vehicle.
8. WAVEFORM 8





* (a) VVT sensor bank 1

* (b) VVT sensor bank 2

* (c) Crankshaft position sensor





HINT
The wavelength becomes shorter as engine rpm increases.

9. WAVEFORM 9





* VVT OCV





10. WAVEFORM 10





* Engine speed signal





HINT
The wavelength becomes shorter as the engine rpm increases.

11. WAVEFORM 11





* Throttle actuator positive terminal





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

12. WAVEFORM 12





* Throttle actuator negative terminal





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

13. WAVEFORM 13





* Vehicle speed signal





HINT
The wavelength becomes shorter as vehicle speed increases.

14. WAVEFORM 14 (Reference)





* CAN communication signal





HINT
The waveform varies depending on the CAN communication signal.

15. WAVEFORM 15 (Reference)





* CAN communication signal





HINT
The waveform varies depending on the CAN communication signal.