California Emission Regulation Applicable ATX Model

Inspection Using An Oscilloscope (Reference) (California emission regulation applicable ATX model)




CKP sensor signal
- PCM terminals: 27(+) - 1(-)
- Oscilloscope setting: 1 V/DIV (Y), 10 ms/DIV (X), DC range
- Vehicle condition: Idle after warm up (no load)




CMP sensor signal
- PCM terminals: 28(+) - 2(-)
- Oscilloscope setting: 500 mV/DIV (Y), 20 ms/DIV (X), DC range
- Vehicle condition: Idle after warm up (no load)




Generator field coil control signal
- PCM terminals: 36(+) - 26(-)
- Oscilloscope setting: 250 mV/DIV (Y), 1 ms/DIV (X), DC range
- Vehicle condition: Idle after warm up (no load)




HO2S (rear) signal
- PCM terminals: 44(+) - 26(-)
- Oscilloscope setting: 200 mV/DIV (Y), 1 ms/DIV (X), DC range
- Vehicle condition: Idle after warm up (no load)




HO2S (middle) signal
- PCM terminals: 45(+) - 26(-)
- Oscilloscope setting: 200 mV/DIV (Y), 1 ms/DIV (X), DC range
- Vehicle condition: Idle after warm up (no load)




Generator Output Voltage signal
- PCM terminals: 63(+) - 26(-)
- Oscilloscope setting: 2.5 V/DIV (Y), 5 ms/DIV (X), DC range
- Vehicle condition: Idle after-warm up (no load)




VSS out signal
- PCM terminals: 70(+) - 26(-)
- Oscilloscope setting: 500 mV/DIV (Y), 10 ms/DIV (X), DC range
- Vehicle condition: Idle after warm up (no load)




Fuel injection signal
- PCM terminals
- No.1:76(+) - 26(-)
- No.2: 50(+) - 26(-)
- No.3: 75(+) - 26(-)
- No.4: 49(+) - 26(-)

- Oscilloscope setting: 2.5 V/DIV (Y), 10 ms/DIV (X), DC range
- Vehicle condition: Idle after warm up (no load)




HO2S (front) heater control signal
- PCM terminals: 84(+)-26(-)
- Oscilloscope setting: 2.5 V/DIV (Y), 50 ms/DIV (X), DC range
- Vehicle condition: Idle after warm up (no load)




Purge control signal
- PCM terminals: 85(+) - 26(-)
- Oscilloscope setting: 2 V/DIV (Y), 10 ms/DIV (X), DC range
- Vehicle condition: Idle after warm up (engine speed approx. 700 rpm, no load, P/S off, A/C off)




OCV control signal
- PCM terminals: 97(+) - 26(-)
- Oscilloscope setting: 2 V/DIV (Y), 0.8 ms/DIV (X), DC range
- Vehicle condition: Idle after warm up (engine speed approx. 700 rpm, no load, P/S off, A/C off)




Ignition coil signal
- PCM terminals
- No.1 cylinder: 102 (+) - 26 (-)
- No.2 cylinder: 78 (+) - 26 (-)
- No.3 cylinder: 103 (+) - 26 (-)
- No.4 cylinder: 104 (+) - 26 (-)

- Oscilloscope setting: 2.5V/DIV (Y), 20 ms/DIV (X), DC range
- Vehicle condition: Idle after warm up (no load)