Oscilloscope Patterns and Waveforms

INSPECTION USING AN OSCILLOSCOPE (REFERENCE)




Fuel injection control
PCM terminals (California emission regulation applicable model)
- Fuel injection No.1: 2AW(+) - 1 AZ(-)
- Fuel injection No.2: 2AS(+) - 1 AZ(-)
- Fuel injection No.3: 2AX(+) - 1 AZ(-)
- Fuel injection No.4: 2AT(+) - 1 AZ(-)

PCM terminals (except for California emission regulation applicable model)
- Fuel injection No.1: 2BB(+) - 1 AZ(-)
- Fuel injection No.2: 2BC(+) - 1AZ(-)
- Fuel injection No.3: 2BD(+) - 1AZ(-)
- Fuel injection No.4: 2AZ(+) - 1AZ(-)

Oscilloscope setting
- 10 V/DIV (Y), 25 ms/DIV (X), DC range

Vehicle condition
- Idle after warm up (engine speed approx. 650 rpm, no load)