Check HO2S (S1) performance
- Warm up the engine to normal operating temperature.
- Connect VMI to KDS and select "Oscilloscope".
- Connect Channel A positive probe to Pin No. 6 (Pumping Current) and Channel A negative probe to Pin No. 4 (Trim Resistor).
- Connect Channel B positive probe to Pin No. 1 (Nernst Voltage) and Channel B negative probe to Pin No. 3 (Virtual Ground).
A: Approx. 2000rpm
CH.1 - Pumping Current & Virtual Ground: - 0.5 to 0.4 V
CH.2 - Nernst Voltage & Trim Resistor: -1.0 to -0.0 V
B: Fuel Cut
CH.1 - Pumping Current & Virtual Ground: Approx. 0.89V
CH.2 - Nernst Voltage & Trim Resistor: Approx. 0.64V