Volvo V70 - Recent Questions, Troubleshooting & Support - Page 7

google it there is a russian guy who posts Volvo wiring diagrams also you could checkout turbobricks forum and Volvo uk club lots of helpful Volvo nuts on there. Also try local library.

How To Service Light Reset in Volvo S80 V70 XC70 2006 on

The first thing you must do is have the computer control module for the engine scanned for fault codes.

Is the vehicle in park ? Your vehicle like all vehicles have safety systems that won't allow the vehicle key to be turn off and locked if the vehicle is in gear and running . How ever this systems can malfunction . There is a lock out soleniod in the column or the console if floor shifter . The first place to start would be to have it checked for DTC's - diagnostic trouble codes . These codes can cut diagnostic time down a bunch . Or there could be a problem the ignition lock cylinder ! If no codes are present taking the steering wheel off to get out the lock cylinder and replacing it . You may be better of taking it to a repair shop .

I would check to see if there is a fault code for a vehicle speed sensor (VSS), so you need to have the engine control system (known as the OBD2 control system)) module scanned for fault codes to see if the VSS has set a failure code.

Year, make and model please

probably your divert er valve failed , very expensive for my car anyway last year.

probably because you car needs a service !

with the tailgate fully open remove the plastic trim on the inside
the bolts of the wing will be visible
remember to unplug the brakelight connection and carefully remove the pipe from the window washer jet

Won't start, or won't even crank over?

Check the owner's manual most cars have a manual release cable in the back.

What does it do? Does it crank over but not fire up?

I had a similar issue and started to notice other electrical failures along with the gas gauge. My rear doors would not lock and my rear wiper stopped working. I started pulling fuses and relays to see if this would reset, no go. But then I hit the jackjpot. In the rear electrical panel, below all the fuses and relays is a 2" x 2" black plastic square with a big screw in it.

Remove the screw and pull evenly on the black square. This seems to be a major electrical hub for the car. I reconnected and all 3 of my issues disappeared...I read somewhere that a fix might be to disconnect the battery for a few minutes, which I guess re-sets some relays and circuits, but I guess this did the same thing. Good luck.