Re: Oxygen Sensor Wiring

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Re: Oxygen Sensor Wiring[900/94] posted by Leo Montreuil on
Tuesday, 15 December 1998, at 10:43 p.m.

According my diagram there is 4 wire connector
From sensor To computer Connector pins #
white green 1
white green/black 2
black brown 4
grey green/white 3

Pins 1 & 2 are for the heating elements. One is connected to ground and the other one to the ECU (that is probably providing +12V). Pins 3 & 4 are connecting to the ECU to provide the Lamda voltage. Pin 3 is connected to ground in the ECU and pin 4 is providing the sensor voltage.

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