Pinout Values and Diagnostic Parameters

1NZ-FE ENGINE CONTROL SYSTEM: SFI SYSTEM:

TERMINALS OF ECM





HINT: The standard normal 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 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 B1 S2 shows the ECM input values from the heated oxygen sensor.





4. WAVEFORM 4

Fuel injector No. 1 (to No. 4) injection signal





HINT: The wavelength becomes shorter as the engine rpm increases.





5. WAVEFORM 5

Knock sensor





HINT: The waveforms and amplitudes displayed differ slightly depending on the vehicle.





6. WAVEFORM 6

Crankshaft position sensor and Camshaft position sensor





HINT: The wavelength becomes shorter as the engine rpm increases.





7. WAVEFORM 7

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





HINT: The wavelength becomes shorter as the engine rpm increases.





8. WAVEFORM 8

Purge VSV





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





9. WAVEFORM 9

Vehicle speed signal





HINT: The wavelength becomes shorter as the vehicle speed increases.





10. WAVEFORM 10

Throttle actuator positive terminal





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





11. WAVEFORM 11

Throttle actuator negative terminal





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





12. WAVEFORM 12

Engine speed signal





HINT: The wavelength becomes shorter as the engine rpm increases.





13. WAVEFORM 13

Reference: CAN communication signal





HINT: The waveform varies depending on the CAN communication signal.





14. WAVEFORM 14

Reference: CAN communication signal





HINT: The waveform varies depending on the CAN communication signal.