Pinout Values and Diagnostic Parameters

2AZ-FE ENGINE CONTROL SYSTEM: 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 the terminals displayed in the "Specified Condition" column. The illustration above can be used as a reference to identify the ECM terminal locations.













1. WAVEFORM 1

Fuel injector:

HINT

The wavelength becomes shorter as the engine rpm 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 rpm increases.

3. WAVEFORM 3

(a) Camshaft position sensor:

(b) Crankshaft position sensor:

HINT

The wavelength becomes shorter as the engine rpm 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

Knock sensor:

HINT

* The wavelength becomes shorter as the engine rpm increases.

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

8. WAVEFORM 8

Camshaft timing oil control valve (OCV):

HINT

The wavelength becomes shorter as the engine rpm increases.

9. WAVEFORM 9

Purge VSV:

HINT

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

10. WAVEFORM 10

Engine speed signal:

HINT

The wavelength becomes shorter as the engine rpm increases.

11. WAVEFORM 11

Vehicle speed signal:

HINT

The wavelength becomes shorter as the vehicle speed increases.

12. WAVEFORM 12

CAN communication signal::

HINT

The waveform varies depending on the CAN communication signal.

13. WAVEFORM 13

CAN communication signal::

HINT

The waveform varies depending on the CAN communication signal.