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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 minutes/DIV (X), DC range
- Vehicle condition: 4GR

Shift solenoid B signal




- PCM terminals: 1C (+)-body ground (-)
- Oscilloscope setting: 5 V/DIV (Y), 5 minutes/DIV (X), DC range
- Vehicle condition: 1GR (Except for M range)

Shift solenoid C signal




- PCM terminals: 1D (+)-body ground (-)
- Oscilloscope setting: 5 V/DIV (Y), 5 minutes/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 minute/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: 1H (+)-body ground (-)
- Oscilloscope setting: 200 mV/DIV (Y), 1 minute/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 minutes/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 minute/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 minute/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 minute/DIV (X), DC range
- Vehicle condition: Idle after warm up (engine speed approx. 700 rpm, A/C ON)

APP signal Accelerator pedal is released




- PCM terminals: 1AL (+)-body ground (-)
- Oscilloscope setting: 2.5 V/DIV (Y), 2 minutes/DIV (X), DC range
- Vehicle condition: Ignition switch is turned to the ON position. (engine off)




Accelerator pedal is depressed

HO2S (front) heater control signal




- PCM terminals: 2G(+)-body ground (-)
- Oscilloscope setting: 5 V/DIV (Y), 125 minutes/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: 2G1 V/DIV (Y), 25 minutes/DIV (X), DC range
- Vehicle condition: Idle after warm up (engine speed approx. 650 rpm, no load)

CMP sensor signal (-)




- PCM terminals: 2V (+)-body ground (-)
- Oscilloscope setting: 2G1 V/DIV (Y), 25 minutes/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 minutes/DIV (X), DC range
- Vehicle condition: Idle after warm up (engine speed approx. 650 rpm, no load)

CKP sensor signal (-)




- PCM terminals: 2Z (+)-body ground (-)
- Oscilloscope setting: 2 V/DIV (Y), 10 minutes/DIV (X), DC range
- 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 minute/DIV (X), DC range
- Vehicle condition: Idle after warm up (engine speed approx. 650 rpm, no load)

HO2S (front) signal




- PCM terminals: 2AG (+)-body ground (-)
- Oscilloscope setting: 0.2 V/DIV (Y), 500 minutes/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 minutes/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: 2AQ (+)-body ground (-)
- Oscilloscope setting: 0.5 V/DIV (Y), 1 minute/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 minutes/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 minutes/DIV (X), DC range
- Vehicle condition: Idle after warm up (engine speed approx. 650 rpm, no load)
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