Pinout Values and Diagnostic Parameters
1GR-FE ENGINE CONTROL SYSTEM: SFI SYSTEM: TERMINALS OF ECM
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 STD Voltages 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 from the sensor.
1. WAVEFORM 1
Camshaft Timing Oil Control Valve (OCV)
HINT: The wavelength becomes shorter as the engine rpm increases.
2. WAVEFORM 2
Air Fuel Ratio Sensor Heater
HINT: The wavelength varies in accordance with the engine operating condition.
3. WAVEFORM 3
Heated Oxygen Sensor
HINT: In the Data List, item O2S B1 S2 or O2S B2 S2 shows the ECM input values from the heated oxygen sensor.
4. WAVEFORM 4
Fuel Injector
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 on the tester differ slightly depending on the vehicle.
6. WAVEFORM 6
(a) VVT sensor
(b) Crankshaft position sensor
HINT: The wavelength becomes shorter as the engine rpm increases.
7. WAVEFORM 7
(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.
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
Airbag Sensor Assembly
14. WAVEFORM 14
CAN Communication Signal (Reference)
HINT: The wavelength varies depending on the CAN communication signal.
15. WAVEFORM 15
CAN Communication Signal (Reference)
HINT: The wavelength varies depending on the CAN communication signal.