Speedometer/odometer not working

Tiny
WILLV28
  • MEMBER
  • 2002 MITSUBISHI GALANT
Four cylinder front wheel drive automatic 61,409 miles.

Hello,

I hooked up a new radio and I think it is fine. But the problem comes from after. At first the speedometer and odometer would not work when the radio was on. Now it will not work at all. Removing the radio did not solve this.

What might be the cause of this? I check all the fuses, replaced a bad one and it is still happening. But I did get the illumination lights back.

Thanks
Do you
have the same problem?
Yes
No
Tuesday, December 9th, 2008 AT 10:42 AM

37 Replies

Tiny
WILLV28
  • MEMBER
Additional information: It is only the speedometer and odometer. The odometer displays, but does not rack up any new mileage.
Was this
answer
helpful?
Yes
No
+4
Tuesday, December 9th, 2008 AT 3:46 PM
Tiny
KHLOW2008
  • EXPERT
Hi willv28,

Thank you for the donation.

When speedometer and odometer fails to work, the most common fault is the speed sensor. I would suggest checking it first.
Was this
answer
helpful?
Yes
No
+2
Tuesday, December 9th, 2008 AT 4:09 PM
Tiny
WILLV28
  • MEMBER
Thank you. Can I get to it from the top of the car or is it mounted on the transmission on the bottom side? I have not been able to seem to locate it.
Was this
answer
helpful?
Yes
No
+1
Tuesday, December 9th, 2008 AT 4:25 PM
Tiny
KHLOW2008
  • EXPERT
Hi willv28,

The vehicle speed sensor ( VSS ) is located on top right front of trans-axle housing. Item # 3 in the diagram.


http://www.2carpros.com/forum/automotive_pictures/192750_CompLoc02GalantMitchel_1.jpg

Was this
answer
helpful?
Yes
No
+6
Wednesday, December 10th, 2008 AT 7:25 AM
Tiny
WILLV28
  • MEMBER
Okay, I will check it out when I get home from work today. If it pans out, I will donate more, lol.

Just a question. I know how to check the voltage to the harness that connects. But how do you know if the sensor itself is bad? PS - I am being thrown no check engine light.
Was this
answer
helpful?
Yes
No
Wednesday, December 10th, 2008 AT 8:20 AM
Tiny
KHLOW2008
  • EXPERT
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.


http://www.2carpros.com/forum/automotive_pictures/192750_VSSTesting02Galant_1.jpg

Was this
answer
helpful?
Yes
No
+5
Wednesday, December 10th, 2008 AT 8:38 AM
Tiny
WILLV28
  • MEMBER
I am sorry I am being such a pain. But I did not find it. It is just dark when I get home. I did go by this picture as additional help from my manual. I am not hugely mechanically inclined, but, I know I could do this if I could just get to the part.


http://www.2carpros.com/forum/automotive_pictures/103998_29149_mits_g0134_1.gif



Where it is in this picture there is just what looks like a flat plate inserted instead?
Was this
answer
helpful?
Yes
No
+2
Wednesday, December 10th, 2008 AT 4:21 PM
Tiny
KHLOW2008
  • EXPERT
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. ;)
Was this
answer
helpful?
Yes
No
Wednesday, December 10th, 2008 AT 4:42 PM
Tiny
WILLV28
  • MEMBER
Where that picture shows is nothing, just a black flat plate, no wire harness or anything. I do think I found it though. It was on the part of the transmission directly under the battery.

http://www.2carpros.com/articles/mitchell1eautorepair-car-repair-manuals

It translates as "supply speed sensor" in google. I do not know why the only references to the part number on the part are in Chinese.
Was this
answer
helpful?
Yes
No
Wednesday, December 10th, 2008 AT 4:58 PM
Tiny
WILLV28
  • MEMBER
Okay, I was not able to get anything out of the sensor itself. The part does not "spin" as the diagram procedure says. I think they are referring to a different type. The part I find is identical to the one in my manual.

How sure are you it would be this part? Is there anything else in the electrical system, that might cause this? If I knew what the circuit diagram that the sensor was on, that would help me check anything else.

Ugh, what a time for this to happen while I am waiting for a real manual. Haynes manuals are not the best, lol.

Well, I now need to find the part. No one seems to have it the local Mitsubishi dealer wants me to take it in instead.

PS - The part number on the sensor is G4T08371.
Was this
answer
helpful?
Yes
No
Wednesday, December 10th, 2008 AT 5:30 PM
Tiny
KHLOW2008
  • EXPERT
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.


http://www.2carpros.com/forum/automotive_pictures/192750_TranHousing02Galant_1.jpg

Was this
answer
helpful?
Yes
No
+3
Thursday, December 11th, 2008 AT 6:37 AM
Tiny
WILLV28
  • MEMBER
Maybe there is something wrong here.

Here are some pictures from yesterday and today:


http://www.2carpros.com/forum/automotive_pictures/103998_IMG_0570_1.jpg



This is the view of the car from the driver's side. The part I found was pulled out in this picture. You can somewhat see the spot that was pointed out in that picture of the exact location I posed yesterday.


http://www.2carpros.com/forum/automotive_pictures/103998_IMG_0571_1.jpg



This is the actual part I pulled out. Matched what is in the Haynes manual but does not seem to be it.


http://www.2carpros.com/forum/automotive_pictures/103998_IMG_0572_1.jpg



This is a closeup of that location that is from what is pointed out in the picture from yesterday (which is below). That is what I find when I look there.


http://www.2carpros.com/forum/automotive_pictures/103998_29149_mits_g0134_1.gif



Could it be something is different about this car that what we are looking for? Because those are the only things I can even find. I just looked at all the areas and the last picture of my car comes closest to the location. I guess my confusion is for a reason. lol
Was this
answer
helpful?
Yes
No
Thursday, December 11th, 2008 AT 2:36 PM
Tiny
KHLOW2008
  • EXPERT
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.
Was this
answer
helpful?
Yes
No
Friday, December 12th, 2008 AT 7:30 AM
Tiny
WILLV28
  • MEMBER
Another person I know told me they do not think it is the speed sensor at all. They think I may have blown the circuity to the speedometer/odometer. But the odometer displays, just does not register new.

He claims that the speed sensor "may be inside the transmission" on this model. Which made me white as a ghost.

When I installed the radio, I did have a wire mixed up with another one. They apparently used the wrong color or one of the colors on the diagram were off. I think that is corrected as the illumination light problem went away when I fixed it and replaced the fuse.

If I cannot get figure it out soon, I will just take it in. I cannot keep driving it not registering miles. Luckily I do not drive much other than to work. Though I cannot really afford much in repairs right now.
Was this
answer
helpful?
Yes
No
-1
Friday, December 12th, 2008 AT 3:08 PM
Tiny
KHLOW2008
  • EXPERT
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.
Was this
answer
helpful?
Yes
No
Saturday, December 13th, 2008 AT 8:19 AM
Tiny
WILLV28
  • MEMBER
Alright, I went to have the codes checked. There were none.

Also, it seems to shift just fine. At least not out of the ordinary.
Was this
answer
helpful?
Yes
No
Saturday, December 13th, 2008 AT 1:26 PM
Tiny
KHLOW2008
  • EXPERT
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).
Was this
answer
helpful?
Yes
No
-1
Saturday, December 13th, 2008 AT 9:59 PM
Tiny
WILLV28
  • MEMBER
Well, did not need to go beyond step five.

Read the voltage of the wire. It was 5.5 volts. Turned the radio on, it went to 24.89 volts.

So, looks like I found the problem.

So, do you have a wiring diagram for the stereo harness for the 2002 Galant? I will rewire the radio (the harness was cut when I bought it). The diagram I had was not quite right. Make sure the voltage reads right with the radio on/off. Then I will do the repair to the circuit board.

I assume I am replacing the printed circuit board like it says. Whew, $35.00 part if true. Does not look too complicated, lol.

Anything else you want me to do before I order parts, etc? Please advise.
Was this
answer
helpful?
Yes
No
Sunday, December 14th, 2008 AT 10:15 AM
Tiny
KHLOW2008
  • EXPERT
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.


http://www.2carpros.com/forum/automotive_pictures/192750_Radio02Galant_1.jpg




http://www.2carpros.com/forum/automotive_pictures/192750_Radio02Galant01_1.jpg




http://www.2carpros.com/forum/automotive_pictures/192750_Radio02Galant02_1.jpg




http://www.2carpros.com/forum/automotive_pictures/192750_Radio02Galant02a_1.jpg

Was this
answer
helpful?
Yes
No
+3
Sunday, December 14th, 2008 AT 11:24 AM
Tiny
WILLV28
  • MEMBER
Thank you very much. I think all this information combined solves my problem with the radio.

It appears the wiring diagram I got from someone was way off. But it does many total sense now why the voltage is coming in.

If this changes anything in the diagram, please let me know.

What happened was the diagram they gave me had the yellow-black radio wire going to the antenna power. So, that resulted in me pumping the antenna power into the PCM system when the radio was in tuner mode.

Hopefully I did not damage the PCM in any way.

I will add some funds to this Question.
Was this
answer
helpful?
Yes
No
Sunday, December 14th, 2008 AT 5:15 PM

Please login or register to post a reply.

Recommended Guides