Pinout Values and Diagnostic Parameters

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

1. SFI SYSTEM





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 check results should be compared with the standard normal voltage for that pair of terminals, listed 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.

(a) WAVEFORM 1





(1) Camshaft Timing Oil Control Valve (OCV) operation signal





HINT
The wavelength becomes shorter as the engine rpm increases.

(b) WAVEFORM 2





(1) A/F sensor signal





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

(c) WAVEFORM 3





(1) Heated oxygen sensor signal





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

(d) WAVEFORM 4





(1) Fuel injector operation signal





HINT
The wavelength becomes shorter as the engine rpm increases.

(e) WAVEFORM 5





(1) Knock sensor signal





HINT
* The wavelength becomes shorter as the engine rpm increases.
* The waveforms and amplitudes displayed differ slightly depending on the vehicle.
(f) WAVEFORM 6





(1) Variable Valve Timing (VVT) sensor signal (1)

(2) Crankshaft position sensor signal (2)





HINT
The wavelength becomes shorter as the engine rpm increases.

(g) WAVEFORM 7





(1) Variable Valve Timing (VVT) sensor signal (1)

(2) Crankshaft position sensor signal (2)





HINT
The wavelength becomes shorter as the engine rpm increases.

(h) WAVEFORM 8





(1) Igniter IGT signal (from ECM to igniter) (1)

(2) Igniter IGF signal (from igniter to ECM) (2)





HINT
The wavelength becomes shorter as the engine rpm increases.

(i) WAVEFORM 9





(1) Purge VSV for EVAP system operation signal





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

(j) WAVEFORM 10





(1) Vehicle speed signal





HINT
* The wavelength becomes shorter as the vehicle speed increases.
* Depending on the vehicle, the output waveform voltage may rise to 12 V if influenced by optionally installed systems.
(k) WAVEFORM 11





(1) Throttle drive motor operation signal (positive terminal)





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

(l) WAVEFORM 12





(1) Throttle drive motor operation signal (negative terminal)





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

(m) WAVEFORM 13





(1) Engine speed signal





HINT
The wavelength becomes shorter as the engine rpm increases.