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Oxygen Sensor question 200 1984

posted by  B.C. on  Sat Dec 18 14:12 CST 2004
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last visit: Wed Mar 28 22:28 CST 2012
[RELATED]

Hello -

Looking at the wiring diagram pictorials from the Volvo Service Manual Wiring Diagram manuals, the 1984 book does not show the 02 sensor having three wires, only one.

The 1987-1988 book does show the 3-wire sensor. The diagram is for LH 2.2. The 1984 is LH-Jetronic II, sometimes called LH 2.0.

The 1987 2.2 diagram shows the wires from the 02 sensor as SB(black) to ground, Y-R to main-fuel relay terminal 87/2, so that's probably the other side of the heater. The other wire, black-connector-green, is the signal to the ECU.

Hope this helps.

Bob

:>)
--
240s: 1986 244GL, 1988 244GL, and 5 others.






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