Oscilloscope Patterns and Waveforms

Inspection Using An Oscilloscope (Reference)

Shift solenoid A signal




PCM terminals
- 1B (+) - body ground (-)

Oscilloscope setting
- 5 V/DIV (Y), 5 ms/DIV (X), DC range

Vehicle condition
- 4GR

Shift solenoid B signal




PCM terminals
- 1C (+) - body ground (-)

Oscilloscope setting
- 5 V/DIV (Y), 5 ms/DIV (X), DC range

Vehicle condition
- 1 GR (Except for M range)

Shift solenoid C signal




PCM terminal
- 1D (+) - body ground (-)

Oscilloscope setting
- 5 V/DIV (Y), 5 ms/DIV (X), DC range

Vehicle condition
- 1GR or 2GR

Pressure control solenoid (+) signal




PCM terminals
- 1G (+) - body ground (-)

Oscilloscope setting
- 5 V/DIV (Y), 1 ms/DIV (X), DC range

Vehicle condition
- All of the following conditions are met.
- Ignition switch is turned to the ON position. (engine off)
- P or N position
- CTP

Pressure control solenoid (-) signal




PCM terminals
- 1 H (+) - body ground (-)

Oscilloscope setting
- 200 mV/DIV (Y), 1 ms/DIV (X), DC range

Vehicle condition
- All of the following conditions are met.
- Ignition switch is turned to the ON position. (engine off)
- P or N position
- CTP

Vehicle speed signal (ATX)




PCM terminals
- 1J (+) - body ground (-)

Oscilloscope setting
- 1 V/DIV (Y), 2.5 ms/DIV (X), DC range

Vehicle condition
- Vehicle speed is 32 km/h {20 mph}.

Input/turbine speed sensor (+) signal




PCM terminals
- 1M (+) - body ground (-)

Oscilloscope setting
- 500 mV/DIV (Y), 1 ms/DIV (X), DC range

Vehicle condition
- Idle after warm-up

Input/turbine speed sensor (-) signal




PCM terminals
- 1Q (+) - body ground (-)

Oscilloscope setting

- 500 mV/DIV (Y), 1 ms/DIV (X), DC range

Vehicle condition
- Idle after warm-up

Cooling fan control signals




PCM terminals
- 1W (+) - body ground (-)

Oscilloscope setting
- 5 V/DIV (Y), 1 ms/DIV (X), DC range

Vehicle condition
- Idle after warm up (engine speed approx. 700 rpm, A/C ON)

APP signal




Accelerator pedal is released




Accelerator pedal is depressed

PCM terminals
- 1 AL (+) - body ground (-)

Oscilloscope setting
- 2.5 V/DIV (Y), 2 ms/DIV (X), DC range

Vehicle condition
- Ignition switch is turned to the ON position. (engine off)

HO2S (front) heater control signal




PCM terminals
- 2G (+) - body ground (-)

Oscilloscope setting
- 5 V/DIV (Y), 125 ms/DIV (X), DC range

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

CMP sensor signal

(+)




PCM terminals
- 2U (+) - body ground (-)

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

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

(-)




PCM terminals
- 2V (+) - body ground (-)

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

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

CKP sensor signal

(+)




PCM terminals
- 2Y (+) - body ground (-)

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

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

(-)




PCM terminals
- 2Z (+) - body ground (-)

Oscilloscope setting
- 2 V/DIV (Y), 10 ms/DIV (X), DC rang

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

OCV signal




PCM terminals
- 2AF (+) - body ground (-)

Oscilloscope setting
- 2.5 V/DIV (Y), 1 ms/DIV (X), DC range

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

H02S (front) signal




PCM terminals
- 2AG (+) - body ground (-)

Oscilloscope setting
- 0.2 V/DIV (Y), 500 ms/DIV (X), DC range

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

Generator output voltage signal




PCM terminals
- 2AM (+) - body ground (-)

Oscilloscope setting
- 2 V/DIV (Y), 2.5 ms/DIV (X), DC range

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


Purge control signal




PCM terminals
- 2AN (+) - body ground (-)

Oscilloscope setting
- 2 V/DIV (Y), 0.1 s/DIV (X), DC range

Vehicle condition
- Idle after warm-up

Generator field coil control signal




PCM terminals
- 2AC (+) - body ground (-)

Oscilloscope setting
- 0.5 V/DIV (Y), 1 ms/DIV (X), DC range

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

Fuel injection control




PCM terminals
- Fuel injection No.1: 2BB (+) - body ground (-)
- Fuel injection No.2: 2BC (+) - body ground (-)
- Fuel injection No.3: 2BD (+) - body ground (-)
- Fuel injection No.4: 2AZ (+) - body ground (-)

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)

IGT1, IGT2, IGT3, IGT4 control signals




PCM terminals
- IGT1 (No.1): 2BE (+) - body ground (-)
- IGT2 (No.2): 2BF (+) - body ground (-)
- IGT3 (No.3): 2BG (+) - body ground (-)
- IGT4 (No.4): 2BH (+) - body ground (-)

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)