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compustar remote start, tach wire


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wseattleguy 
Member - Posts: 16
Member spacespace
Joined: June 24, 2008
Location: Washington, United States
Posted: July 13, 2008 at 6:32 PM / IP Logged  
1991 Bmw 325ix 5spd
Compustar p2w9000
Having trouble with the remote start and I'm pretty sure it's the tach wire. I tapped into the tach wire at the speedo. It's the black wire coming out of the blue harness. Apparently the compustar doesn't like this wire because when I have it "learn" the tachometer signal, it gives an error. I'm sure I'm connected to the tach wire, but the compustar expects a tach wire that has increasing voltage as the rpm's increase. The voltage on this tach wire decreases as the rpm's increase.
Any suggestions?
gus1 
Gold - Posts: 1,013
Gold spacespace
Joined: October 15, 2003
Location: Canada
Posted: July 13, 2008 at 7:34 PM / IP Logged  
Go to an injector at the motor
Wherever I go, that is where I end up......
KarTuneMan 
Platinum - Posts: 7,056
Platinum spaceThis member has made a donation to the12volt.com. Click here for more info.spaceThis member consistently provides reliable informationspace
Joined: December 14, 2004
Location: Isle Of Man
Posted: July 13, 2008 at 9:11 PM / IP Logged  
Test a black wire at the diagnostic plug under the hood on the pass. side. It is also a black wire.
wseattleguy 
Member - Posts: 16
Member spacespace
Joined: June 24, 2008
Location: Washington, United States
Posted: July 14, 2008 at 1:17 AM / IP Logged  
I'll give it a try. Thanks.
dswift 
Copper - Posts: 396
Copper spacespace
Joined: March 12, 2007
Location: United States
Posted: July 14, 2008 at 6:39 PM / IP Logged  
compustar has a revised software for these reasons. Check out the tech bulletins on compustar.com in dealer support.
"dont ground out!"
wseattleguy 
Member - Posts: 16
Member spacespace
Joined: June 24, 2008
Location: Washington, United States
Posted: July 17, 2008 at 11:07 AM / IP Logged  
thanks dswift. Problem is, I installed myself and don't have the usb updater. guess i'll give them a call and see if they'll help me out.

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