Pinout Values and Diagnostic Parameters

4GR-FSE ENGINE CONTROL SYSTEM: SFI SYSTEM: TERMINALS OF ECM





HINT
The standard normal 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 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
*: The ECM terminal voltage is constant regardless of the output voltage from the sensor.

1. WAVEFORM 1





Camshaft timing oil control valve (OCV):





2. WAVEFORM 2





Air fuel ratio sensor heater:





HINT
The wavelength varies in accordance with the engine operating condition.

3. WAVEFORM 3





Heated oxygen sensor:





HINT
In Data List, item O2S B1S2 or O2S B2S2 shows the ECM input values from the heated oxygen sensor.

4. WAVEFORM 4





Injector No. 1 (to No. 6) injection signal and Injection confirmation signal:





HINT
The wavelength becomes shorter as the engine speed increases.

5. WAVEFORM 5





Knock sensor:





HINT
* The wavelength becomes shorter as the engine speed increases.
* The waveforms and amplitudes displayed differ slightly depending on the vehicle.

6. WAVEFORM 6





Crankshaft position sensor and VVT sensor for intake camshaft:





HINT
The wavelength becomes shorter as the engine speed increases.

7. WAVEFORM 7





Crankshaft position sensor and VVT sensor for exhaust camshaft:





HINT
The wavelength becomes shorter as the engine speed increases.

8. WAVEFORM 8





Igniter IGT signal (from ECM to igniter) and Igniter IGF signal (from igniter to ECM):





HINT
The wavelength becomes shorter as the engine speed increases.

9. WAVEFORM 9





Purge VSV:





HINT
If the waveform is not similar to the illustration, check the waveform again after idling for 10 minutes or more.

10. WAVEFORM 10





Vehicle speed signal:





HINT
The wavelength becomes shorter as the vehicle speed increases.

11. WAVEFORM 11





Throttle actuator positive terminal:





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

12. WAVEFORM 12





Throttle actuator negative terminal:





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

13. WAVEFORM 13





Engine speed signal:





HINT
The wavelength becomes shorter as the engine speed increases.

14. WAVEFORM 14





High pressure side fuel pump (Spill control valve):





15. WAVEFORM 15





Intake air control valve actuator for swirl control valve positive terminal:





16. WAVEFORM 16





Intake air control valve actuator for swirl control valve negative terminal:





17. WAVEFORM 17





CAN communication signal:





HINT
The waveform varies depending on the CAN communication signal.

18. WAVEFORM 18





CAN communication signal:





HINT
The waveform varies depending on the CAN communication signal.