2G VSS malfunction

[kidtsi]

My speedometer wasn't working so i replace the speedometer and the speed sensor and my cluster still reads 0, i tried 3 different sensors and 3 different clusters with no luck, i also used a test light and the wiring is getting power.

At this point i'm clueless and i would like a little bit of help.

 

[98spydereugene]

I just had problems with mine, a 95 gsx, and took apart everything and cleaned everything, including the sensor, the connection, and all the wiring and got it working. Went from dead to working perfectly by cleaning everything very carefully....just some experience advice..hope you get it working...

 

[kidtsi]

i cleaned everything already, anyone else?

 

[Colt4G63 also]

That's easy! First take your basic graphing voltmeter, and see if you get a decent waveform out of the speed sensor when the final drive (ring and pinion) is turning.

 

[kidtsi]

I took the sensor out and spin it with a drill and took a look a my dsmlink and the speed never moved from 0, i tried this with 3 different sensors, i also tested the wires on the connector with a LED light one was bright the middle one was a ground and the other lighted up less brighter.

 

[Deuce_three]

I probably have the same problem. well with mine. i just press the reset mileage button when your in motion a couple times then it starts working. Our problems could be different though..

 

[kidtsi]

This is frustrating!

 

[420ADJ]

My 99 eclipse was doing the same thing. Come to find out the teeth were grounded down. Does your VSS have good teeth on it?

 

[kidtsi]

I used 3 diferent sensors, even if the teeth were damage wouldnt matter because i spined them with a drill.

 

[420ADJ]

True. That's really weird man. I wonder what's causing that. I will do some research and post them on here.

Maybe the actual speedo gear is bad in the trans.. I hate to say it but the only way to check that is if you take out the whole tranny then remove the bell housing cover. I had to do that when my speedometer quit working. Come to find out the teeth were bad on the gear and the plastic part that turns the VSS had popped off inside of the tranny.

 

[Colt4G63 also]

Hmm... What did the graphing meter say? Was there an output? If so, does it read a signal at the ecu end of the harness? I can only fix your car from across the continent if you follow instructions to the letter.

 

[kidtsi]

Hmm... What did the graphing meter say? Was there an output? If so, does it read a signal at the ecu end of the harness? I can only fix your car from across the continent if you follow instructions to the letter.

I dont have a voltmeter at the moment. I tried using 3 different sensors, 2 different ecu, 2 different clusters and i spins the with a drill to make your there wasnt a problem with the actual transmission, also i check power with and LED light i found, in the connector is getting power, one of them turn bright the middle one is a ground and the other is not as bright.

I removed the connector in the ecu and i checked at the speed sensor pin and the little LED didnt light up, but i checked the speed sensor pin behind the cluster and it did light up.

 

[kidtsi]

Colt4g63 also, where do i check voltage? the sensor, the ecu, or the connector behind the cluster? also what voltage should i be looking at if its fine?

 

[Colt4G63 also]

It should work wherever you test it, and it should look like this:

You must be logged in to view this image or video.

 

[kidtsi]

It should work wherever you test it, and it should look like this:

You must be logged in to view this image or video.

i was hoping for voltage numbers...

 

[Colt4G63 also]

Well the sensor would produce an AC voltage of maybe 2-4 volts, but that's not really how you test it. You need to look for a waveform with proper integrity.

 

[kidtsi]

I don't have a volt meter with a screen like that.

still not working.

 

[Colt4G63 also]

You could have driven up here and used my graphing meter by now.

 

[kidtsi]

you could have driven up here and used my graphing meter by now.

. it is kinda frustrating when my wipers don't work even after a wiper motor swap, dimmer switch keeps melting and my vss is not working so i don't have 2step.

 

[Colt4G63 also]

Don't you guys have automotive techs down there in Texas?

 

[kidtsi]

not in my town.

 

[Colt4G63 also]

Next time you're in Western New York PM me and I'll fix all those little issues right up for you. On the first try no less.

 

[johnmarines]

have you checked to see if maybe a fuse is blown?

 

[DeviantBoost]

grab the schematics and check for continuity. then maybe youll have your 2step back.

 

[rabenne]

the only way to figure out whats goin on is to trace the continuity of each wire in circuit. if you arent getting anything on the gauge when you spin the sensor with the drill there is a wiring issue, or ecm issue. the ecm reads that funky "waveform" posted by colt4g63. It then puts out a voltage to control the gauge based on how fast the sensor is spinning. if you arent reading anything in dsmlink, than I believe the problem is between the sensor and the ecm. if the ecm was "recieving" the VSS signal, you would see it in dsmlink, even though you still may not see it on the gauge. If you were reading speed in dsmlink but not the gauge than the problem would lie between the ecm and the gauge, not the sensor and the ecm... i hope that makes sense... trace the signal wire from the sensor to the ecu and make sure there is good continuity. to do so, use a voltage drop test. you can google for more information on the test. if you pm me the results I will tell you how to fix your car. I may be able to provide a schematic if you cant get one yourself.

a lab scope sure would make it easier!