Volvo 760 2.3 turbo - power issue

[Laird Scooby]

Originally Posted by lessertegasi

Good morning.
Thank you and sorry for my short hiatus.
I just bought the multimeter.
Looking forward to your instructions.

All the best

That's good news! Have you also located the Lambda snsor and it's coonector?

Should be 3 wires into the connector, Pink, Black and Brown. The Black and Brown wires are the two you're interested in.

With the engine hot, set the multimeter on to the 20V dc range (roughly 10 o'clock position) and put the black probe (-ve) into the back of the connector where the Black wire is, put the red (+ve) probe into the Brown and start the car. Assuming you've done it correctly, you should have a voltage between 0-1V showing so switch it one position anti-clockwise onto the 2V range.

The voltage should be in the region of 0.445V dropping to 0V and rising to nearly 1V on a cycle. If it is steady, note the value as that is a good clue and let me know - chances are if it's steady it will be 0V or very close to it.

As a double check you've got a good reading, change back to the 20V range and move the red +ve probe from the brown to the pink - it should read battery voltage which as the engine is running, should be ~14.0-14.4V.