Hi everyone, i have a problem with my 97 z3. It will not rev past 5200rpm and i have a vss code p0500, abs and atc are working as they should. I think i'm losing the vss signal from the asc to the dme. I,m hoping someone here knows what pin at each ecu that would be. Any help is appreciated
Scan the whole car with a BMW specific code reader on all modules. They will offer a good hint if there is loss of communication, or what else. P codes aren't terribly useful in this case.
-Abel
- E36 328is ~210-220whp: Lots of Mods.
- 2000 Z3: Many Mods.
- 2003 VW Jetta TDI Manual 47-50mpg
- 1999 S52 Estoril M Coupe
- 2014 328d Wagon, self-tuned, 270hp/430ft-lbs
- 2019 M2 Competition, self-tuned, 504whp
- 2016 Mini Cooper S
I'm reading 0mph on live data so i'm pretty sure its a wire from the abs/asc to the dme
So this is what i found out so far, vehicle speed is learned by the right rear abs sensor. It sends speed info to the abs/asc computer, the signal is then sent to the dme from the asc. The first part of that must be good as i do not have any problems with my abs system and if i unplug the right rear abs sensor i get an abs light, so i must be losing the vss signal from the asc to the dme . I just don't know what pins that would be .
Does your speedometer work?
-Abel
- E36 328is ~210-220whp: Lots of Mods.
- 2000 Z3: Many Mods.
- 2003 VW Jetta TDI Manual 47-50mpg
- 1999 S52 Estoril M Coupe
- 2014 328d Wagon, self-tuned, 270hp/430ft-lbs
- 2019 M2 Competition, self-tuned, 504whp
- 2016 Mini Cooper S
Yes, all other gauges and systems are working correctly
What about the vehicle speed sensor in the differential? I don't know if a defective speed sensor there would trigger a CEL though.
The differential speed sensor goes to the cluster and is for the speedometer, on board computer, cruise control, volume adjustment on the radio, speed-sensitive wipers, etc. The wheel speed sensors go to the ECU and are for ABS and traction control
BMW MOA 696, BMW CCA 1405
Update , i found a wiring print. I ran a wire from pin 15 on dme to pin 15 on asc , just up over the windshild for now, test drove and the code went away. I'm able to read vehicle speed on my scanner and my red line is back, so other then running a wire the correct way the car is FIXED. Hopefully this can help someone . My thanks to everyone who replied .
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