Signal Wave Form & Data

This figure shows the wave form measured at terminal 3 of HO2S.

Fig 1: Identifying Signal WAVE FORM

Courtesy of HYUNDAI MOTOR CO.

1. Point (1) is the duration heater operates and the normal voltage is below 0.8V.

   In case the output voltage is over 0.8V.

   Possible cause: Poor PCM ground connection Or poor PCM connector's connection

2. Point (2) is the duration heater doesn't operates and the normal voltage is battery voltage.