Need help with VSS on 97 civic lx

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Nov 15, 2013

Jimmy Criswell

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Need help with VSS on 97 civic lx

I have a 97 civic lx. Speedo jumps around even sitting still. Replaced with new VSS and still does same thing. Have good ground and good positive. Measuring 4.5 volts from blue/white wire. Volts are not pulsing. I am using the power probe so they may not. Any ideas on what to test or where to go from here. I have to get my speedow fixed. I have been running without VSS plugged in. Thanks in advance.

Nov 15, 2013

ezone

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Re: Need help with VSS on 97 civic lx

Quote:

Volts are not pulsing.

Differential carrier would have to be turning in order to get the VSS to make pulses.

PCM/TCM, Cruise and speedo all share the VSS signal.

Does the cruise work correctly?
Got a scanner? Does the vehicle speed read correctly on the scanner datalist even while the speedo is acting wrong?

If you answered yes to both of those, then the problem is likely in the speedometer itself.