Oscilloscope Patterns and Waveforms

Ignition timing signals




- PCM terminals
- IGT1 (No.1): 2BA (+)-Negative battery terminal(-)
- IGT2 (No.2): 2AW (+)-Negative battery terminal(-)
- IGT3 (No.3): 2AX (+)-Negative battery terminal(-)
- IGT4 (No.4): 2AT (+)-Negative battery terminal(-)

- Oscilloscope setting: 2 V/DIV (Y), 50 minutes/DIV (X), DC range
- Vehicle condition: Idle after warm-up