Speedometer not working

Hi willv28,

When speedometer and odometer fails to work, the most common fault is the speed sensor. I would suggest checking it first. The vehicle speed sensor ( VSS ) is located on top right front of trans-axle housing. Item # 3 in the diagram.

Check out the diagrams (Below). Please let us know if you need anything else to get the problem fixed.

Cheers

Hi willv28,

Thank you for the consideration.

Mitshubishi is a funny system, quite a number of malfunctions do not show on the CEL but a scanner would retrieve the codes.

Vehicle speed sensor (VSS)
Remove VSS from rear of transmission or top of trans-axle. Connect 3-10 k/ohm resistor as shown in figure number six . Connect voltmeter between terminals number two and three. Spin shaft of VSS and check for voltage pulsations. There should be about four voltage pulsations per revolution. If there are not four pulsations per revolution, replace VSS.

Hi willv28,

Do not worry about asking many questions. You should be sure of what are required before proceeding with rectification and any questions should be asked to get the correct answer. I would not like you to go into a job without knowing or understanding the situation. That would be bad and instead of rectification, more harm might be derived and time and money would be wasted.

Unplug the wire harness and the part below it is the speed sensor.

Thanks for the picture, it helps. I am going to download it to my PC as I was not able to find a suitable one from my database. ;)

Hi willv28,

The part that you are referring to is the transmission main shaft speed sensor It is not the vehicle speed sensor.

From the diagram, look at item three. The VSS is located above the part where Item two (oil seal) is seated.

Your picture shows either Item four or five. There are two of them.
I am unable to get any parts information from my estimator.

Hi willv28,

We are in the same boat, both confused. Lol.

Well, you are correct, the supposed location of the speed sensor is not being utilized.

I understand some models uses the shaft speed sensors for the speedometer and it is via the PCM. However, those that I found were all about a gear driven speed sensor.

I would try other models to see if I can come up with anything else.

Hi willv28,

Yes, it is possible the fault does not lie with the speed sensor.

Just to make sure, is there any shifting abnormalities while driving? If no, the speed sensor should be okay. Get a scan done to see if there are any diagnostic error codes. If the speed sensor is faulty, it would show on the scanner.

We shall go with this first. If the results are negative, we shall proceed with testing/checking of the wiring circuit.

So we can rule out the speed sensor and its circuit to the PCM.

I just checked through another area of my database and it seems the speed sensor is stated as on the side of trans-axle, near firewall, maybe you can check that out to confirm, just out of curiosity and for future reference and some portion of testing requires unplugging the connections.

Anyway, I will provide a complete diagnostic procedures for you to check through and hope an answer is found.

PS. After going through the diagnostic procedure, I believe your radio is the cause of the problem. Refer to # 10

Speedometer does not work:

1. Connect scan tool to data link connector, check for Diagnostic Trouble Code (DTC). If DTC P0500 (Vehicle Speed Sensor) is set, diagnose this DTC first. Go to step 6. If DTC P0500 is not set, go to next step.

2. On Eclipse, if trip odometer is not working normally, go to next step. If trip odometer is working normally go to step 5. On Galant, if tachometer is not working normally, go to next step. If tachometer is working normally, go to step 5

3. Disconnect instrument cluster connector. Turn ignition switch to ON position. Connect DVOM between ground and instrument cluster connector terminal No. 52 (Black/White wire) on Eclipse or terminal No.29 (Black/White wire) on Galant. If battery voltage is present, go to next step. If battery voltage is not present, check harness connectors and harness wiring between instrument cluster and ignition switch for damage. Repair as necessary.

4. Using a DVOM, check resistance between ground and instrument cluster harness connector terminal No. 34 (Black wire) on Eclipse or terminal No. 30 (Black wire) on Galant. If resistance is less than 2 ohms, replace instrument cluster printed circuit board or speedometer and tachometer. If resistance is greater than 2 ohms, check instrument cluster connector and harness wiring. Repair as necessary. If connector and wiring are okay, go to next step.

5. Disconnect vehicle speed sensor connector and instrument cluster connector. Turn ignition switch to ON position. Connect DVOM between ground and harness side of instrument cluster connector terminal No. 29 (White/Blue wire) on Eclipse or terminal No. 16 (Yellow/Black wire) on Galant. Voltage should be 5 volts. If voltage is okay, repair or replace instrument cluster printed circuit board or speedometer and tachometer. If voltage is not 5 volts, check instrument cluster connector and harness wiring. Repair as necessary. If connector and wiring are okay, go to next step.

6. Disconnect vehicle speed sensor harness connector and connect DVOM to harness side. Check vehicle speed sensor power supply voltage between terminal No. 1 (Black/White wire) on Eclipse or (Black/Blue wire) on Galant and ground. Battery voltage should be present. If voltage is okay, go to next step. If voltage is not present, check vehicle speed sensor harness connector and wiring. Repair as necessary.

7. Using DVOM, check resistance between ground and vehicle speed sensor harness connector terminal No. 2 (Black wire). Resistance should be less than 2 ohms. If resistance is greater than 2 ohms, check instrument cluster connector and harness wiring. Repair as necessary. If connector and wiring are okay, go to next step.

8. Disconnect vehicle speed sensor harness connector. Connect DVOM between ground and harness side terminal No. 3 (White/Blue wire) on Eclipse or (Yellow/Black wire) on Galant. If 9 volts are not present, check vehicle speed sensor harness connector and wiring. Repair as necessary. If 9 volts are present, go to next step.

9. Check harness wiring between vehicle speed sensor connector to radio and tape player connector, auto-cruise control ECU ECM (M/T) or PCM (A/T) connector and instrument cluster connector. If connectors or wiring are damaged, repair as necessary. If connectors and wiring are okay, go to next step.

CAUTION: To prevent damage to scan tool, always turn ignition off before connecting or disconnecting scan tool.

NOTE: If ECM (M/T) or PCM (A/T) is replaced, immobilizer-ECU should also be replaced. Each ECM (M/T) or PCM (A/T) has an encrypted code for immobilizer-ECU, and is registered in immobilizer-ECU.

10. Connect scan tool to data link connector. Turn ignition switch to ON position. Read DTC. Disconnect radio and tape player connector. If DTC P0500 does not reset, replace radio and tape player. If speedometer does not work, disconnect auto-cruise control ECU connector. If DTC P0500 does not reset, replace auto-cruise control ECU. If speedometer does not work, disconnect instrument cluster harness connector. If DTC P0500 does not reset, replace instrument cluster. If DTC P0500 resets when any connector is disconnected, replace ECM (M/T) or PCM (A/T).

Hi willv28,

So a simple spark sent us all over the world. If the printed circuit is out, you can have a look at which point it has fused and sometimes a soldering job with a fine wire might save you the $35.00 and the trouble of ordering the parts.

I have attached the wiring schematics and the first part one and two are if the vehicle is equipped with amplifier.

Hi willv28,

Cheers and thank you for the offer.

If you have any other questions, feel free to ask, we will always be there for you.

Merry Christmas!

Hi willv28,

So we meet again. The last time you went up to step five, so maybe you need to continue further down the list to see if you can come up with any new findings.

By the way, did you check if the speed sensor is located at the side of transmission axle near firewall?

It sounds like he blew out the PCM

Merry Christmas!