Pinout Values and Diagnostic Parameters

1NR-FE ENGINE CONTROL: 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 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





Igniter Signal (IGT and IGF signal)





HINT
The wavelength becomes shorter as the engine speed increases.

2. WAVEFORM 2





Crankshaft Position Sensor Signal





HINT
The wavelength becomes shorter as the engine speed increases.

3. WAVEFORM 3





Camshaft Position Sensor Signal





HINT
The wavelength becomes shorter as the engine speed increases.

4. WAVEFORM 4





No. 1 (to No. 4) Injector Signal





HINT
The wavelength becomes shorter as the engine speed increases.

5. WAVEFORM 5





Air Fuel Ratio Sensor (Bank 1 Sensor 1) Heater Signal





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

6. WAVEFORM 6





Heated Oxygen Sensor (Bank 1 Sensor 2) Signal





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

7. WAVEFORM 7





Knock Sensor Signal





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

8. WAVEFORM 8





Vehicle Speed Signal





HINT
The wavelength becomes shorter as the vehicle speed increases.

9. WAVEFORM 9





Throttle Actuator Positive Terminal Signal





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

10. WAVEFORM 10





Throttle Actuator Negative Terminal Signal





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

11. WAVEFORM 11





Purge Valve Signal





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

12. WAVEFORM 12





Engine Speed Signal





HINT
The wavelength becomes shorter as the engine speed increases.

13. WAVEFORM 13





Camshaft Timing Oil Control Valve (for Intake Camshaft Signal)





14. WAVEFORM 14





Camshaft Timing Oil Control Valve Assembly for Exhaust Camshaft Signal





15. WAVEFORM 15





CAN Communication Signal (Reference)





HINT
The waveform varies depending on the CAN communication signal.

16. WAVEFORM 16





CAN Communication Signal (Reference)





HINT
The waveform varies depending on the CAN communication signal.