BEJ: I saw the triple ground connection on the wiring diagrams which kinda pointed to all the symptoms very early on BUT!!! Now have 2 spareECU's! Leaves just turning here! Thanx John S

Sorry about delay in finishing this post. "Life is what happens when you had something else planned" The Volvo ran out of shop under its own power today! With new Oil cooler hoses and new Radiator (To stop all the !#$%$#@#$ stuff from corroding the new ground wires installed.) A new Cam se...

Thanx BEJ: Well some progress has been made. Repaired the ECU, ( Added a fuse into the line from A18 input pin to signal ground (same as the grounds to back plane)). Fuse was in case!! Found a "Test" 1998 same ECU numbers and with a lot of trepidation installed the"Repaired/Test "...

Thanx BEJ: I did find the better set of wiring diagrams at this site .Thanx for the Tip tho. Took awhile to figure out the Volvo lexicon! Did find the temp sensor and Was NOT pblm. I am working part time on this so progress reports are not on a regular basis. I did take apart ECU "Box" and...

Thanx for the reply! Yes all sensors were unplugged at measurement. Will check for optional ground to outside air temp sensor. My Diagrams do not show this optional ground but will look. Flying kinda blind as do not have a breakout box or all the factory manuals. The location of the connection reall...

Working on a friends 1998 V70 AWD Turbo. Car had no start problems 6 months ago ECM for Motor was replaced was fine till a couple weeks ago then no start with Temp sensor and Crank position sensor codes. Also would crank and after a few revolutions Fan would start and run till it timed out even with...