where exactly is this part located in a 1998 S70

 

Are you talking about the vertical acceleration sensor? That's mounted on the front of the engine cradle, right side. Little flat black square with a single wiring pigtail plugged into it. It's near the A/C compressor. This is used by the computer as part of the "spark knock" detection system. Basically, it's an accelerometer that lets the computer know if the suspected knocking from the knock sensor really was a knock or a jolt due to a hard bump in the road. If the computer gets a "knock" signal from the knock sensor at the same time as the vertical acceleration sensor signals a hard hit, it knows that it wasn't a knock. It prevents the computer from retarding the spark unnecessarily. It's kind of a Volvo quirk, but it helps the entire engine management system to be far more precise.

 

So therefore i can replace it when I want.Not an emergency type of thing?

 

No, not an emergency. But it will affect performance and mileage.

 

here is a pic of the sensor. anyone know of the harnesss that attaches to it part number?

 

So how can you tell that the sensor is bad, or its time to replace it?

 

Professional version can be used in the analysis and writing video recording and playback of personal computers and statistical acceleration due to gravity, the functionality of the whole.

Analysis software for Windows is a free download from the storeroom α(This application language is Japanese.)
· Http://amonooki.web.fc2.com/program/canalyser.html

Recording
While you reflect on the monitor in real driving conditions the car-free, to be recorded.

Playback and
And immediately see the data were recorded, traveling, etc. can be useful for checking the gymkhana.

Statistics
You can see the statistics and data of maximum acceleration of gravity, making it ideal for measurement of performance, such as tires.

Warning functions and acceleration
Naraseru warning sound acceleration so that you set, and the practice of load transfer, these can be used up to eco-driving.

Video & analysis on a PC, write
By moving the data to the PC, and can be analyzed from the dedicated software, and export video. More detailed analysis can be embedded into the exported video travel videos.

※ It is recommended that you buy from can be confirmed to work with (If you wish to use) version and Windows version Perosnal.