Pinout Values and Diagnostic Parameters

4GR-FSE ENGINE CONTROL: SFI SYSTEM: TERMINALS OF ECM

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 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 assembly operation signal

2. WAVEFORM 2

Heated oxygen sensor signal

HINT
In Data List, item O2S B1S2 or O2S B2S2 shows the ECM input values from the heated oxygen sensor.

3. WAVEFORM 3

Fuel injector No. 1 (to No. 6) injection signal and injection confirmation signal

HINT
The wavelength becomes shorter as the engine speed increases.

4. WAVEFORM 4

Knock sensor signal

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

5. WAVEFORM 5

Crankshaft position sensor and VVT sensor for intake camshaft signal

HINT
The wavelength becomes shorter as the engine speed increases.

6. WAVEFORM 6

Crankshaft position sensor and VVT sensor for exhaust camshaft signal

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

8. WAVEFORM 8

Purge VSV 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.

9. WAVEFORM 9