Inspection Using an Oscilloscope (Reference) Purpose

Vehicle speed signal
- PCM terminal: 58 (+) <-> 24(-)
- Oscilloscope setting: 1 mV/DIV (Y), 25 ms/DIV(X), DC range
- Vehicle condition: Driving speed 60 kph [37 mph]




Engine speed signal (output)
- PCM terminal: 48 (+) <-> 103(-)
- Oscilloscope setting: 2 V/DIV (Y), 5 ms/DIV (X), DC range
- Vehicle condition: Idle after warm up




Pressure control solenoid signal
- PCM terminal: 81 (+) <-> 103(-)
- Oscilloscope setting: 2 V/DIV (Y), 10 ms/DIV (X), DC range
- Vehicle condition: Idle after warm up




Input/turbine speed signal
- PCM terminal: 84 (+) <-> 23(-)
- Oscilloscope setting: 0.5 V/DIV (Y), 2 ms/DIV (X), AC range
- Vehicle condition: Idle after warm up




HO2S signal (front, RH/LH)
- PCM terminal: 60, 87 (+) <-> 91 (-)
- Oscilloscope setting: 0.2 V/DIV (Y), 200 ms/DIV (X), DC range
- Vehicle condition: Idle after warm up




SGC signal
- PCM terminal: 85 (+) <-> 86(-)
- Oscilloscope setting: 0.5 V/DIV (Y), 10 ms/DIV (X), AC range
- Vehicle condition: Idle after warm up




IAC control signal
- PCM terminal: 83 (+) <-> 24(-)
- Oscilloscope setting: 2 V/DIV (Y), 0.1 ms/DIV (X), DC range
- Vehicle condition: Idle after warm up




Fuel injection signal
- PCM terminal
- No.1: 75 (+) <-> 103(-)
- No.2: 101 (+) <-> 103(-)
- No.3: 74 (+) <-> 103(-)
- No.4: 100 (+) <-> 103(-)
- No.5: 73 (+) <-> 103(-)
- No.6: 99 (+) <-> 103(-)
- Oscilloscope setting: 2 V/DIV (Y), 10 ms/DIV (X), DC range
- Vehicle condition: Idle after warm up




IGT signal
- PCM terminal
- IGT1 26 (+) <-> 103(-)
- IGT2 52 (+) <-> 103(-)
- IGT3 78 (+) <-> 103(-)
- Oscilloscope setting: 2 V/DIV (Y), 10 ms/DIV (X), DC range
- Vehicle condition: Idle after warm up




NE signal
- PCM terminal: 2 (+) <-> 22(-)
- Oscilloscope setting: 4 V/DIV (Y), 2.5 ms/DIV (X), AC range
- Vehicle condition: Idle after warm up




Purge control signal
- PCM terminal: 18 (+) <-> 103(-)
- Oscilloscope setting: 2 V/DIV (Y), 10 ms/DIV (X), DC range
- Vehicle condition: Idle after warm up




Generator output voltage signal
- PCM terminal: 30 (+) <-> 103(-)
- Oscilloscope setting: 2 V/DIV (Y), 1 ms/DIV (X), DC range
- Vehicle condition: Idle after warm up




Generator field coil signal
- PCM terminal: 53 (+) <-> 103(-)
- Oscilloscope setting: 0.5 V/DIV (Y), 1 ms/DIV (X), DC range
- Vehicle condition: Idle after warm up