Pinout Values and Diagnostic Parameters

2AR-FE ENGINE CONTROL SYSTEM: SFI SYSTEM: TERMINALS OF ECM





HINT
The standard 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 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 (Sensor 1) Heater





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

3. WAVEFORM 3





Heated Oxygen Sensor (Sensor 2)





HINT
In the Data List, item O2S B1 S2 shows the ECM input values from the heated oxygen sensor.

4. WAVEFORM 4





Injector No. 1 (to No. 4) Injection 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





Camshaft Position Sensor





HINT
The wavelength becomes shorter as the engine speed increases.

7. WAVEFORM 7





Crankshaft Position Sensor





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.
* Depending on the systems installed to the vehicle, the output voltage may rise to 12 V.

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





CAN Communication Signal (Reference)





HINT
The waveform varies depending on the CAN communication signal.

15. WAVEFORM 15





CAN Communication Signal (Reference)





HINT
The waveform varies depending on the CAN communication signal.

16. WAVEFORM 16





DC Motor for TCV Positive Terminal





17. WAVEFORM 17





DC Motor for TCV Negative Terminal