Mazda RX-8 Workshop Manual page 1222

Terminal connected: 2F (+)—Negative battery terminal
Oscilloscope setting: 5 V/DIV (Y): 20 ms/DIV (X), DC range
Measurement condition: High engine speed after warm-up
Eccentric shaft position sensor
Terminal connected: 2AG (+)—Negative battery terminal
Oscilloscope setting: 2 V/DIV (Y): 5 ms/DIV (X), DC range
Measurement condition: Idling after warm-up (no load)
Field coil control (Generator)
Terminal connected: 2AI (+)—Negative battery terminal
Oscilloscope setting: 0.5 V/DIV (Y): 1 ms/DIV (X), DC range
Measurement condition: Idling after warm-up (no load)
Generator output voltage
Terminal connected: 2AJ (+)—Negative battery terminal