Everything but speedometer and odometer work on the dash, do you think replacing the dash might be the trick?

Tiny
DAVID FAGAN
  • MEMBER
  • 2004 KIA RIO
  • 1.8L
  • 4 CYL
  • 2WD
  • AUTOMATIC
  • 111,789 MILES
Okay, I replaced both sensors. Oh, let me state that this car has no ABS but has one tone ring speed sensor on the passenger side. And so, like I said I replaced both and the one on the back of the transmission I've replaced twice thinking I got a bad one at first and I checked the wires still nothing!
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Saturday, August 27th, 2022 AT 7:44 PM

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Tiny
JACOBANDNICKOLAS
  • EXPERT
Hi,

The speedometer itself may have failed, but there could be a wiring issue or a problem with the transmission control module.

What I would suggest is this. Have the can-bus scanned for codes. CAN stands for controller area network. Basically, all the different computers/modules are tied together via a few wires. This type of scan will retrieve the codes regardless of the module storing them.

Here is a link that explains how it's done:

https://www.2carpros.com/articles/can-scan-controller-area-network-easy

The reason I suggest this is because although the speedometer could be bad, there are other things that can cause it as well.

I attached diagnostics for a P1500 below which is simply related to a vehicle speed signal fault. If you scan it, there may be a code more specific to the cause.

Take a look through the diagnostics and let me know if you are comfortable performing them.

Let me know.

Joe

See pics below.
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Saturday, August 27th, 2022 AT 9:50 PM
Tiny
DAVID FAGAN
  • MEMBER
Okay, now, I checked everything again now the wires with voltage that goes to speed sensor don't have any voltage coming out! That's why I don't have a speedometer!
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Monday, August 29th, 2022 AT 11:31 AM
Tiny
JACOBANDNICKOLAS
  • EXPERT
Try the test I listed below. If there is no voltage from the sensor, either the drive gear is bad, or the sensor has failed.

See the directions below.

Let me know what you find.

Joe

See pic below.
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Monday, August 29th, 2022 AT 6:34 PM

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