Pinout Values and Diagnostic Parameters

2TR-FE ENGINE CONTROL: 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.

















*1: The ECM terminal voltage is constant regardless of the output voltage from the sensor.

1. WAVEFORM 1





Fuel injector





HINT
The wavelength becomes shorter as the engine speed 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 the engine speed increases.

3. WAVEFORM 3





(a) Camshaft position sensor

(b) Crankshaft position sensor





HINT
The wavelength becomes shorter as the engine speed increases.

4. WAVEFORM 4





Throttle actuator positive terminal





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

5. WAVEFORM 5





Throttle actuator negative terminal





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

6. WAVEFORM 6





Heated oxygen sensor





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

7. WAVEFORM 7





Air fuel ratio sensor heater





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

8. WAVEFORM 8





Knock sensor





HINT
* The wavelength becomes shorter as the engine speed increases.
* The waveforms and amplitudes displayed differ slightly depending on the vehicle.
9. WAVEFORM 9





Camshaft timing oil control valve





HINT
The wavelength becomes shorter as the engine speed increases.

10. WAVEFORM 10





Purge VSV





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

11. WAVEFORM 11





Engine speed signal





HINT
The wavelength becomes shorter as the engine speed increases.

12. WAVEFORM 12





Vehicle speed signal





HINT
The wavelength becomes shorter as the vehicle speed increases.

13. WAVEFORM 13





CAN communication signal (reference)





14. WAVEFORM 14





CAN communication signal (reference)





15. WAVEFORM 15





Terminal DI of air injection control driver





HINT
The wavelength changes when the air injection control driver detects malfunctions in the air injection system.