How does the speedometer and odometer work?

This is likely related to what is called a speed input/output shaft sensor which is a sensor mounted down on the transmission that monitors the speed of the output shaft of the transmission. This is relayed to your ECU which produces this information in your speedometer and odometer.

What does it mean when your speedometer is not working?

If the oil pressure, coolant, charge, or gas gauge doesn’t work or works erratically, the problem is in the gauge, wiring, or sender. Speedometers are unique in that some of them use physical cables instead of sensors, so a speedometer not working can also indicate a broken cable or stripped gear.

Can you replace the odometer on an E30?

Removal of the odometer is simple, but the only practical solution is to replace the entire dial. E30 Fuel gauges are a standard needle gauge, fitted with an orange warning lamp when the tank level reaches 8litres.

Where is the tachometer located on a car?

The large right-hand gauge is the Tachometer. On lower-specification cars, this was replaced with a clock. The tachometer is fed by a signal from the ECU. This black wire goes through the C101 plug to the instrument cluster, and goes to pin 7 of the blue plug (C1).

What does it mean when your odometer does not work?

Take a look here. If your speedometer stops registering speed and your odometer does not move as far as registering miles traveled, you also realize that your directional signals do not self cancel, your engine could be running differently and stalling, your problem is more than likely the VSS (vehicle speed sensor) on the transmission.

What to do if your speedometer is not working?

The speed sensor does more than just control the speedometer, it also helps to control the cruise control system and may even affect the way that the engine runs. If the service engine soon light is on, then check the trouble code with an OBDII scanner. If you don’t have a scanner, take it to the local parts store and have them run it for you.

Is the speedometer on my Freightliner not working?

The speedometer & odometer are not working. I hooked my prolink to it & do not get a Freightliner..The speedometer & odometer are not working… I have a 2003 freightliner with a 500 Cummins/10 speed that gets a true 6 mpg.

How can I tell if my speedometer is working?

If it works normally, then the speedometer module is at least receiving a speed input signal and the wiring and sensor & tone ring can be assumed to be good. Any slight dents, chips, etc., in either the exciter ring or VSS will create needle waver. Measure air gap between the VSS and exciter ring. It should be 0.38-0.51mm (0.015-0.020″).

What to do if your odometer is not working?

These odometer mechanisms hang up over time. You have two choices: 1. Pull the cluster, pull the speedo, clean up the pivot points and any soloidified grease you see. Should work fine after that. 2.

Why does the speedo on a Harley Davidson stop working?

The magnetic speed sensor pick up gets fouled from the metal shavings in the transmission which causes the speedo to stop working and the directionals to stop self canceling because of no input to the ECM from the sensor. The ECM thinks that the bike is standing still because of no input.

How does the speedometer and odometer work?