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.