Mazda6 Dial on Odometer Stops Working Then Starts Working Again While Driving
1 of the most inconvenient things that can happen to your 6 is when the speedometer stops working. You don't really realize how much you lot look at the thing until it's only e'er sitting at 0 MPH while driving down the road.
If your Mazda 6's speedometer is non working, it's unremarkably going to be caused by an effect with the VSS (vehicle speed sensor), or a bad ECU. The VSS is ordinarily non very expensive, and they are non that difficult to supersede.
Vehicles used to use a cable that would ordinarily run from the tail shaft of the transmission to the speedometer. There was a physical/mechanical connexion between the drivetrain and the speedometer.
Instead of this direct connection, a modern vehicle uses the vehicle speed sensor and relays that information to the speedometer. The VSS is 1 part of a system of sensors that helps keep you safe (traction control, ABS, cruise control).
Speedometer Not Working Causes: Mazda 6
A mod vehicle's speedometer takes the input from the Vehicle Speed Sensor and sends that data to the ECU. The ECU is programmed with your half dozen's gear ratios and stock tire height. Information technology combines this information to ship the speed reading to the instrument cluster. The causes of a bad speedometer will typically be found in these 4 things:
- VSS– A faulty speed sensor will oft exist accompanied past the P0500 (VSS excursion malfunction) trouble code. The speed sensor does more than than only control the speedometer, it also helps to control the prowl control system and may even affect the style that the engine runs. If the service engine presently light is on, then bank check the trouble lawmaking with an OBDII scanner. If you don't have a scanner, have it to the local parts store and have them run it for you.
- Wiring Issues– Exposed wiring to or from the VSS tin cause your 6'due south speedometer to no longer work. This will often manifest itself after driving through heavy water. It'southward worth checking to see if the fuse has blown. If it has, just be aware that it will eventually blow again without addressing the cause of the problem. Here'south a great guide on how to diagnose a wiring curt in virtually whatsoever vehicle
- ECU– Your 6's Engine Control Unit (ECU for short) is the computer that takes all of the information that the vehicle sensors compile and uses it to control the vehicle systems, and sends important vehicular telemetry data to the driver via the instrument cluster. If at that place is something wrong with the ECU, it may no longer be able to send the speed telemetry to the instrument panel. This one is a possibility if at that place are no VSS related trouble codes, simply taking a look at the wiring would exist a ameliorate identify to go before taking a expect at the ECU.
- Speedometer Itself– The odds of the speedometer going out all by itself, while the rest of the gauges continue to work are not great. Most of the time if the speedometer is out, it means that there is a bigger problem with the entire instrument cluster. Do all of the other gauges work? If yeah and so, the problem is probably non in the speedometer, only the signal going to it. Other gauges went out also? Ok, looking at the instrument console and ECU are going to exist where to start. Musical instrument panel first.
6 Speedometer Not Working Diagnosis
If your Mazda 6'due south speedometer is non working, the first identify to go would be to cheque the service engine presently light (if applicative). At present, take it out and come across if the cruise control still works. If it does, that'due south a pretty proficient indication that the vehicle speed sensor is simply fine. If it doesn't, it's time to take a look at it.
Later on testing the cruise control, y'all would desire to move on to the VSS and the wiring going to and from it. Before sticking your head nether the vehicle, check to run across if the fuse going to the VSS is blow. If it is, replacing it may temporarily restore your 6's speedometer, but that doesn't gear upwhy the speedometer stopped working. If everything still checks out, it's time to move on to the ECU.
Determination
Driving without a speedometer can be somewhat dangerous and off putting. Nosotros recommend using a speedometer app. They use the GPS built into your smartphone to give a very accurate speed reading. You tin throw it on your dash until you lot go it fixed. Good luck fixing your 6's speedometer! If in that location is anything that you would like to add, please feel free to leave a comment beneath.
Source: https://www.700r4transmissionhq.com/mazda-6-speedometer-not-working/
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