Here it is, I have a 95 850 engine and engine harness, and both Ecu's in my 97 volvo, everthing works great, but my vehicle speed sensor is not working, changed the sensor, but no luck, still no signal.... how can I fix this?

 

You have to figure out how to trick the computer.

 

do you know how? ive just been driving like this for way too long, but I just dont know what to do.

 

I don't but there was someone on here that did it before.
Did you post this once before?

 

yes i posted this before

 

Did you ever get ahold of the member I asked you to for the info?

 

Yea, if im not mistaken, he had a different situation.... he had just a obd2 tranny, with different vss, on and obd1 engine and harness

 

I will see if I can come up with something.

 

Thanks, that sounds great, please let me know

 

hey tech, have you found out any info about this?

 

Sorry but not as of yet.
Did you try asking on Volvospeed.com?

 

bump, anyone?

 

One alternative.

Could you elaborate on what the problem is again? The ECU not receiving signal from new vehicle speed sensor?


JPN

[IMG]local://upfiles/6892/5914536EE5D14FBF8D8BD75FAC2FF17A.jpg[/IMG]

 

here it is. I have a 97 volvo 850 non turbo... I swapped a 95 volvo 850-

Engine
Engine Wire Harness
Transmission
Ecu
Tcu
and Cluster....

Everthing works great... but Im not getting a speedo signal... so I am guessing maby the wiring going from the TCU to the cluster gets a signal from a different spot. Please let me know what you think.

 

There are a few speed sensors installed, but if you are referring to the speedometer being inoperative, then you may have trouble in the ABS module as the ABS module sends speed signal to the speedometer.

Any codes?


JPN

[IMG]local://upfiles/6892/88080B686D9449AA8C59094AFF94CF5B.jpg[/IMG]

[IMG]local://upfiles/6892/299F79CFE3C74D72ADFED575EB47F1F2.jpg[/IMG]

 

these are what is comming up, I do have a flashing arrow

P0705 Transmission Range Sensor Circuit malfunction
P0500 Vehicle Speed Sensor Malfuntion A

 

My question is how a 95 is OBDI.

I had a 95 GLT for a while that was OBDII.

Is that one of those mid-year production changes?

I hate those...lol

 

Yes midyear producton. The OBDII on those cars only work for the engine codes.

 

ok, I think I came up with a good idea.... so from what ive heard, correct me if I am wrong, the 96 and up volvo 850's use the same pulse signal as the signal given off by the abs sensor.... so if I tap into that signal and use it as my speed sensor it should work.... as long as I switch back to my 96 transmission conrol unit instead of my 95 unit, and also make sure that the pinout from the vss goes to the proper pinout on the tcu... what do you guys think?

 

I think that might do it.