Oscilloscope Patterns and Waveforms

Step 1:

Fuel injection signals

PCM terminals
- Fuel Injection No.1: 2BB (+)-Negative battery terminal (-)
- Fuel Injection No.2: 2BC (+)-Negative battery terminal (-)
- Fuel Injection No.3: 2BD (+)-Negative battery terminal (-)
- Fuel Injection No.4: 2AZ (+)-Negative battery terminal (-)

Oscilloscope setting
- 10 V/DIV (Y), 10 ms/DIV (X), DC range Vehicle condition
- Idle after warm-up