Pinout Values and Diagnostic Parameters

2AZ-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 (sensor 1) heater:

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

3. WAVEFORM 3

Heated oxygen sensor (sensor 2):

HINT
In DATA LIST, item O2S B1 S2 shows the ECM input values from the heated oxygen sensor.

4. WAVEFORM 4

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 wavelength becomes shorter as the engine rpm increases.
* 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

CAN communication signal (Reference):

HINT
The waveform varies depending on the CAN communication signal.

14. WAVEFORM 14

CAN communication signal (Reference):

HINT
The waveform varies depending on the CAN communication signal.