Pinout Values and Diagnostic Parameters

2TR-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.

*1: Only for the vehicle equipped with VSC.

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

Air fuel ratio sensor heater

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

8. WAVEFORM 8

Knock sensor

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

9. WAVEFORM 9