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Wiring goes in, speed sensor goes... WTF??

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Old Jul 26, 2010
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Thumbs down Wiring goes in, speed sensor goes... WTF??

I ran my power line through the pass. side wiring harness hole (behind glove box) and down and out and then to the trunk (no biggie there) But now the check-engine light is on, and no speedometer reading... Read the light, and it came up as no signal from sensor (code 14?) So i'm assuming that I jiggled something or pinched a wire. I'm wondering if anyone has ever had experience with this before? Any tips? I checked all the grounds and no dice so far...
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Old Jul 26, 2010
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Re: Wiring goes in, speed sensor goes... WTF??

Originally Posted by Psykotik_913
I checked all the grounds and no dice so far...
Did you check the connector to the sensor?
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Old Jul 26, 2010
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Re: Wiring goes in, speed sensor goes... WTF??

If you have an automatic, then the vehicle speed sensor(vss) is near the passenger side firewall. It sticks straight up out of the transmission and has a 3 wire connector running to it. Check to see if the connector is seated. If it is seated, and still gives you trouble, then you can look up how to troubleshoot the connector to see if the sensor is bad, or the wiring is bad. I have a 98, and I guess that there is a somewhat common issue where the wire bundle that runs to the VSS gets worn down behind the intake manifold and starts to short out. If you find that one of the connectors doesn't have the proper voltage, then you might want to check that wire bundle(but it's hard to get to and see unless you can get underneath the vehicle). I found the repair manual pages specific to this issue on another forum.. I hope nobody takes offense to me linking that: http://www.clubcivic.com/board/showthread.php?t=180280
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Old Jul 27, 2010
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Re: Wiring goes in, speed sensor goes... WTF??

Originally Posted by lazlong
Did you check the connector to the sensor?
Yessir- forgot to mention that..
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Old Jul 27, 2010
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Re: Wiring goes in, speed sensor goes... WTF??

Originally Posted by ahhhonda
If you have an automatic, then the vehicle speed sensor(vss) is near the passenger side firewall. It sticks straight up out of the transmission and has a 3 wire connector running to it. Check to see if the connector is seated. If it is seated, and still gives you trouble, then you can look up how to troubleshoot the connector to see if the sensor is bad, or the wiring is bad. I have a 98, and I guess that there is a somewhat common issue where the wire bundle that runs to the VSS gets worn down behind the intake manifold and starts to short out. If you find that one of the connectors doesn't have the proper voltage, then you might want to check that wire bundle(but it's hard to get to and see unless you can get underneath the vehicle). I found the repair manual pages specific to this issue on another forum.. I hope nobody takes offense to me linking that: http://www.clubcivic.com/board/showthread.php?t=180280
Speed sensor checked and engine bay side wiring checked, no kinks or visible wear... I also got a wiring diagram from a buddy to double check all the ground locations. Same guy said that the sensor its self shouldn't go bad unless something happens to it directly(i.e. coolant got into his) Thanks for the advice and the link
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Old Jul 27, 2010
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Re: Wiring goes in, speed sensor goes... WTF??

Did you get a voltmeter and check the voltage at the connector? It's important that the voltage be correct or the speedo won't work and you may get CELs. The voltage is supposed 5 volts or higher. I found out that my aftermarket cruise control was the cause of my problem. With CC hooked up the voltage was around 3volts, and with it disconnected the voltage was around 6volts. No more CEL's and the speedo worked once the CC was disconnected. You don't need any special adapters to check the voltage, just find a good ground on the engine and hit the blue/white wire with the positive meter lead. You should get+5v or more there. The black/yellow should be ~+12V. (test both with ignition ON). Also, check fuse 15 to make sure it isn't blown. The black wire should be ground, so check continuity on that wire with a known good ground.
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Old Aug 6, 2010
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Re: Wiring goes in, speed sensor goes... WTF??

So I finally got some time yesterday to get in and take a look (kinda) & I light tested this connector-
Name:  Wiring0022.jpg
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RED= NOT working
BLACK= Unused

Multiple wires with no power = common source right? and since my gas meter is fluctuating and a few other lights are working...? Any insite is appreciated, and to ahhhonda- i haven't been able to get my hands on a voltmeter yet, would this still be a symtom?
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Old Aug 6, 2010
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Re: Wiring goes in, speed sensor goes... WTF??

Originally Posted by ahhhonda
Did you get a voltmeter and check the voltage at the connector? It's important that the voltage be correct or the speedo won't work and you may get CELs. The voltage is supposed 5 volts or higher. I found out that my aftermarket cruise control was the cause of my problem. With CC hooked up the voltage was around 3volts, and with it disconnected the voltage was around 6volts. No more CEL's and the speedo worked once the CC was disconnected. You don't need any special adapters to check the voltage, just find a good ground on the engine and hit the blue/white wire with the positive meter lead. You should get+5v or more there. The black/yellow should be ~+12V. (test both with ignition ON). Also, check fuse 15 to make sure it isn't blown. The black wire should be ground, so check continuity on that wire with a known good ground.
This one correct?
Name:  Wiring005.jpg
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Old Aug 7, 2010
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Re: Wiring goes in, speed sensor goes... WTF??

So, I haven't tested the voltage on the VSS wiring harness, but if I disconnect the wiring harness, my speedometer still hovers around 20 mph. I jostled the wires connected to the harness to see if that would have an effect, but nothing changed. Does this sound like more of a problem with the instrument cluster?
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Old Aug 9, 2010
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Re: Wiring goes in, speed sensor goes... WTF??

Originally Posted by Psykotik_913
This one correct?
Yes, that is the vehicle speed sensor connector.
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Old Aug 9, 2010
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Re: Wiring goes in, speed sensor goes... WTF??

Originally Posted by esmhonda
So, I haven't tested the voltage on the VSS wiring harness, but if I disconnect the wiring harness, my speedometer still hovers around 20 mph. I jostled the wires connected to the harness to see if that would have an effect, but nothing changed. Does this sound like more of a problem with the instrument cluster?
If you disconnect the VSS and your speedo is still showing 20mph then the problem is most likely the speedometer in the instrument cluster. I saw some threads somewhere about a fix for that if you are comfortable with a soldering iron. The fix was along the lines of: remove the instrument cluster, find the circuit board on the speedometer and just re-solder all the connectors. Seems like there was a fair amount of success with that. Sometimes the needle mechanism binds up and I'm not sure what the fix is for that. In any case, if you can't get that fixed then you can get another speedo (or whole instrument cluster) from the junkyard and put it in. You will have to deal with the odometer being incorrect if you do that.
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Old Aug 10, 2010
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Re: Wiring goes in, speed sensor goes... WTF??

Originally Posted by ahhhonda
Yes, that is the vehicle speed sensor connector.
i appreciate the continued help... This blows *** but worse without help...
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