With Voltmeter

Voltage Tests
Engine Condition:
Idle /Front HO2S 0-1.0 Volts
Idle /Rear HO2S 0-1.0 Volts

Deceleration /Front HO2S 0-0.5 Volts
Deceleration /Rear HO2S 0-0.5 Volts

Acceleration /Front HO2S 0-0.5-1.0 Volts
Acceleration /Rear HO2S 0-0.5-1.0 Volts