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GS - 2nd Gen (1998-2005) Discussion about the second generation GS300, GS400 and GS430 (1998 - 2005)

Speedometer and miles

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Old Nov 15, 2018 | 09:51 PM
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Default Speedometer and miles

My gauges are all working except for the speedometer and where it shows the miles. Any ideas? Thank you in advance.
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Old Nov 15, 2018 | 10:24 PM
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Speedo is controlled by the ABS speed sensor at each axle. Either one or more has failed or there is something plugged into your OBD 2 port.
My guess is you are ignoring the VSC/VSC off lights on your dash.
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Old Nov 16, 2018 | 05:41 AM
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You should check your codes. You probably have a VSS vehicle speed sensor oriented code. The most likely cause of this either way is the vehicle speed sensor on the transmission. This is how the speedometer gets its information. The sensors at the wheels are for ABS and wouldn't have to do with the speedometer. What I would do is an Ohm test on the sensor and see if its open (just a dead sensor). I use lab scopes on these to look for wave form, but I know no-one has access to them. Then inspect your wiring as best you can. The less common, but still a possibility, is a bad cluster. But I'm sure the problem is in your VSS.

Last edited by TrueGS300; Nov 16, 2018 at 05:46 AM.
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Old Nov 16, 2018 | 02:59 PM
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Default Speedometer

I know the shift solenoid C is bad which I was I'm formed that's why the VSC/VSC OFF light is on but ABS light came on as well
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Old Nov 16, 2018 | 05:54 PM
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I think you should start fixing what you know is wrong and go from there. You are compiling issues now in hopes that there is a simple fix for all of them it seems.. If you don't have the equipment or knowledge to test these sensors than you just have to take the car to a shop and have it diagnosed. Id replace the vss and the shift solenoid we talked about in your other post. You can ohm test your wss wheel speed sensors and hope you find an open or one thats greatly different than the rest, I use a scanner to watch individual sensors and look for drop outs. Or a lab scope if that data isnt available to check wave form. But you don't have the equipment. So all we can go off of is your codes and the likely cause.
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Old Nov 16, 2018 | 08:30 PM
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Originally Posted by TrueGS300
You should check your codes. You probably have a VSS vehicle speed sensor oriented code. The most likely cause of this either way is the vehicle speed sensor on the transmission. This is how the speedometer gets its information. The sensors at the wheels are for ABS and wouldn't have to do with the speedometer. What I would do is an Ohm test on the sensor and see if its open (just a dead sensor). I use lab scopes on these to look for wave form, but I know no-one has access to them. Then inspect your wiring as best you can. The less common, but still a possibility, is a bad cluster. But I'm sure the problem is in your VSS.
This can't be more wrong for the 2GS.
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Old Nov 16, 2018 | 08:31 PM
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Originally Posted by Smileme
I know the shift solenoid C is bad which I was I'm formed that's why the VSC/VSC OFF light is on but ABS light came on as well
I am willing to bet that one of your ABS speed sensors is bad, which is the exact cause of no speedo.
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Old Nov 21, 2018 | 07:05 PM
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Could be an issue on the vehicle side, however you can send in the speedometer and we can do a full diagnosis on it to see if there's an issue with it.
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