Pinout Values and Diagnostic Parameters

1AR-FE ENGINE CONTROL: SFI SYSTEM: TERMINALS OF ECM





HINT
The standard 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 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.

















* *1: The ECM terminal voltage is constant regardless of the output voltage shown on the Techstream.

* *2: w/ Smart Key System

1. WAVEFORM 1

Camshaft Timing Oil Control Valve Signal:

2. WAVEFORM 2

Air Fuel Ratio Sensor (Bank 1 Sensor 1) Heater Signal:

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

3. WAVEFORM 3

Heated Oxygen Sensor (Bank 1 Sensor 2) Signal:

HINT
In the 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 speed increases.

5. WAVEFORM 5

Knock Sensor Signal:

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

Crankshaft Position Sensor and Camshaft Position Sensor Signal:

HINT
The wavelength becomes shorter as the engine speed increases.

7. WAVEFORM 7

Ignition Coil IGT Signal (from ECM to Ignition Coil) and Ignition Coil IGF Signal (from Ignition Coil to ECM):

HINT
The wavelength becomes shorter as the engine speed increases.

8. WAVEFORM 8

Purge VSV Signal:

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 Signal:

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

11. WAVEFORM 11

Throttle Actuator Negative Terminal Signal:

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 speed 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.

15. WAVEFORM 15

DC Motor for Tumble Control Valve Positive Terminal Signal:

16. WAVEFORM 16

DC Motor for Tumble Control Valve Negative Terminal Signal:

17. WAVEFORM 17

Crankshaft Position Sensor Signal: