Pinout Values and Diagnostic Parameters

2GR-FE ENGINE CONTROL SYSTEM: SFI SYSTEM: TERMINALS OF ECM

1. CHECK ECM

(a) Measure the voltage of the ECM connectors.

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.

HINT
*: The ECM terminal voltage is constant regardless of the output voltage from the sensor.

(b) WAVEFORM 1

HINT
In Data List, item O2S B1S2 shows the ECM input values from the heated oxygen sensor.

(d) WAVEFORM 3

HINT
The wavelength becomes shorter as the engine rpm increases.

(e) WAVEFORM 4

HINT
* The wavelength becomes shorter as the engine rpm increases.
* The waveforms and amplitudes displayed differ slightly depending on the vehicle.
(f) WAVEFORM 5

HINT
The wavelength becomes shorter as the engine rpm increases.

(g) WAVEFORM 6

HINT
The wavelength becomes shorter as the engine rpm increases.

(h) WAVEFORM 7

HINT
The wavelength becomes shorter as the engine rpm increases.

(i) WAVEFORM 8

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

(j) WAVEFORM 9

HINT
The wavelength becomes shorter as the vehicle speed increases.

(k) WAVEFORM 10

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

(l) WAVEFORM 11

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

(m) WAVEFORM 12

HINT
The wavelength becomes shorter as the engine rpm increases.

(n) WAVEFORM 13

HINT
The waveform varies depending on the CAN communication signal.

(o) WAVEFORM 14

HINT
The waveform varies depending on the CAN communication signal.