Structure and inner electrical connection
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A protective layer is applied to prevent damage to the outer electrode due to residue in the exhaust gas. The ceramic layer, made from zirconium dioxide (ZrO2), is conductive to oxygen ions from approx. 350 °C. To ensure that the oxygen sensor reaches the operating temperature as quickly as possible, it includes an integrated heating element.
| Item | Explanation |
|---|---|
| 1 | Oxygen sensor heating |
| 2 | Measuring cell |
PIN REFERENCE
| Pin | Explanation |
|---|---|
| PWM | Pulse-width modulated activation of the oxygen sensor heating |
| Terminal 87 | Battery voltage, terminal 15 on |
| Kl. 31 | Ground to measuring cell |
| U1 | Voltage to measuring cell |