Signal Waveform & Data

Fig 1: O2 Sensor Waveforms - Engine Idle After Warm Up

Courtesy of KIA MOTORS AMERICA, INC.

CH.1 - Pumping Current - Approx. 2.7V

CH.2 - Trim Resistor - Approx. 2.5V

CH.3 - Nernst Voltage - Approx. 2.7V

CH.4 - Virtual Ground - Approx. 2.9Vs

Fig 2: O2 Sensor Waveforms - 2000 RPM & Fuel Cut

Courtesy of KIA MOTORS AMERICA, INC.

1. Approx. 2000rpm

   CH.1 - Pumping Current & Virtual Ground: - 0.5 ~ 0.4 V

   CH.2 - Nernst Voltage & Trim Resistor: -1.0 ~ -0.0 V

2. Fuel Cut

   CH.1 - Pumping Current & Virtual Ground: Approx. 0.89V

   CH.2 - Nernst Voltage & Trim Resistor: Approx. 0.64V

* Test Method: Connect Channel A positive probe to Pumping Current and Channel A negative probe to Trim Resistor.

Connect Channel B positive probe to Nernst Voltage and Channel B negative probe to Virtual Ground.