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Speedometer not working

Tiny
WILLV28
  • MEMBER
  • 22 POSTS
Yeah, I do not see any other parts on the transmission anywhere near the firewall other than the vacant position we found earlier.

I am getting a new cluster that someone is going to mail to me. I have a feeling that the internals of the speedometer portion of the cluster fried and there is no good way to get inside of it.

Just more time not knowing how fast I'm going or how far I have gone, good thing I am on vacation.

Merry Christmas!

Bill
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Wednesday, December 24th, 2008 AT 2:43 PM
Tiny
KHLOW2008
  • MECHANIC
  • 41,814 POSTS
Hi Bill,

Thank you for the additional donations and when you get the new parts, do not forget to let me know the results.

Happy Holidays.
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Thursday, December 25th, 2008 AT 6:01 PM
Tiny
WILLV28
  • MEMBER
  • 22 POSTS
Okay, replace the panel, no change, all instruments work normally except speedometer and odometer. I do not know about number ten in your procedure. There has been no code P0500 given to me at any point during this. The voltages are fine now, so I do not know what else it could be other than the speed sensor, but I do not know where to get to it

Update:

I found this on a forum with someone with a similar issue.

"around 2002, all Mitsubishi's eliminated the dedicated vehicle speed sensor on all the automatics.
Why? Because all the automatics already had an output speed sensor on them. The vehicle speed sensor was redundant. So now, the output speed sensor on the transmission is used for not only correct shifting, but for vehicle speed. The PCM sends the signal to the gauge cluster. You cannot tap off the output speed sensor, as it is an analog A/C waveform that the PCM interprets. Since you have an older car, I do not think your PCM has the capability of sending the correct signal to the gauge cluster. I think the newer transmissions still had the hole machined in the trans-axle for the vehicle speed sensor, but merely plugged it with a plastic plug. Whether or not the gear is still there is unknown (although you said it is not, so I will take your word on it)."

So, it appears that was likely the correct part I pulled out all that time ago for sending the signal. I will check the voltages to that tomorrow. I had to take off the battery to find it last time. But I can reach the connector by hand still.
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Saturday, January 3rd, 2009 AT 5:13 PM
Tiny
WILLV28
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  • 22 POSTS
Well, I have decided to take it in to my local garage, they are good guys. Hopefully they can help, they said it is possible I would have to go to a dealer. That would stink, because they are forty miles away.

But, I give up. The progress from last time is I measured the voltages from the speed sensor, they are all fine. But the voltage at the speedometer terminal is now four volts even which is not low. I also measured the resistances at the grounds in the instrument panel and the speed sensor. They are both really high. I cannot find a problem with the cabling anywhere.
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Wednesday, January 7th, 2009 AT 4:05 PM
Tiny
KHLOW2008
  • MECHANIC
  • 41,814 POSTS
Hi Bill,

Sorry to hear you have not solved the problem. Are you sure the garage is going to be able to assist?

Why do you not go over the trouble shooting steps again and see if you had missed out anything.

I will see if I can get any additional info maybe for 2003 models to see if they fit.

I am not ready to give up. ;)
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Thursday, January 8th, 2009 AT 7:03 AM
Tiny
WILLV28
  • MEMBER
  • 22 POSTS
Thanks for all your help. Sorry this is long.

We have until Tuesday to fix it (I am dropping it off through overnight drop off). I have checked and double checked everything. Ran through the procedure, everything.

The only two small abnormalities are the resistance on the ground is way high, but the tachometer uses the same ground as does everything else and they all still work fine.

But, I thought I was high on voltage on the speedometer wire going to the cluster. It is at 4.00 volts even when key on "on" position. It says it should be fine. Going through both your and the service manual procedure does not yield any results. The voltage on the cluster power is 11.98 voltsand the speed sensor has 11.58 volts.

The garage is a good place, they already told me they were not sure if they could fix that part of it. That it is possible I could need to go to a dealer.

Other things of note the radio does not utilize the speed signal like the manual radio did, so that wire is unused. Also, I think the radio is grounded by a screw directly to the firewall, the radio harness has a ground wire that does not exist, should that be attached somewhere? There is no ground wire in the car radio harness.

Headache, lol
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Thursday, January 8th, 2009 AT 2:55 PM
Tiny
KHLOW2008
  • MECHANIC
  • 41,814 POSTS
Hi Bill,

The radio harness does not have any ground wires as it is grounded via casing to body. Since you replaced the radio, if it is a different system from original, you would need to add a ground wire.

If the ground resistance is high, it means some place a connection is bad. Tachometer might be working but how accurate is it? Try adding a ground to see if it helps.

Following is the test procedure for 03 models but a scan tool is required and I do not know if it is the correct match for your vehicle.

TEST PROCEDURE NO. 1: SPEEDOMETER DOES NOT WORK
To perform this test, Scan Tool MUT-II (MB991502) and Harness Set (MB991223) must be used.

1. Check the speedometer by observing the other meters. Check to see that the tachometer, fuel gauge and temperature gauge are operating normally.
Do all other meters operate? Ã Â Â
If YES, go to next step. Ã Â Â

CAUTION: To prevent damage to the Scan Tool (MB991502), always turn the ignition switch to LOCK (OFF) position before connecting or disconnecting the scan tool.

2. Using scan tool, check the MFI system for diagnostic trouble codes (DTCs). Connect scan tool to the Data Link Connector (DLC). Turn the ignition switch to the ON position. Check the MFI system for diagnostic trouble codes.
Is DTC P0720 set? Ã Â Â
If YES, refer to appropriate Multiport Fuel Injection (MFI) DIAGNOSIS article in ENGINE PERFORMANCE.
If NO, go to next step.
3. Check combination meter connector C-30 and PCM connector C-41 for damage.
Are combination meter connector C-30 and PCM connector C-41 in good condition?
If YES, go to next step.
If NO, repair or replace the connector. After repair, the speedometer should work normally.
4. Check the wiring harness between combination meter connector C-30 and PCM connector C-41. Also check intermediate connector C-17 and joint connector C-56. See Fig. 1 , Fig. 2 and Fig. 9 . If intermediate connector C-66 or joint connector C-56 are damaged, repair or replace the connector.
Is the wiring harness between combination meter connector C-30 and PCM connector C-41 in good condition?
If YES, go to next step.
If NO, repair the wiring harness. After repair, the speedometer should work normally.

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.

5. Check the speedometer by operating the auto-cruise control system.
Does auto-cruise control work normally?
If YES, replace the combination meter. After repair, the speedometer should work normally.
If NO, replace the PCM. After repair, the speedometer should work normally.


https://www.2carpros.com/forum/automotive_pictures/192750_WireHarn03Galant01_1.jpg



https://www.2carpros.com/forum/automotive_pictures/192750_WireHarn03Galant02_1.jpg



https://www.2carpros.com/forum/automotive_pictures/192750_WireHarn03Galant09_1.jpg

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Friday, January 9th, 2009 AT 6:58 AM
Tiny
WILLV28
  • MEMBER
  • 22 POSTS
Got nothing out of it. Could be PCM, the cruise will not come on, but I do not think it would anyway. The light used to come on at least even after the issue, now it will not.

I took the car to the garage today. I will be picking it up sometime tomorrow. Let's see if they can figure it out.
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Tuesday, January 13th, 2009 AT 8:49 PM
Tiny
KHLOW2008
  • MECHANIC
  • 41,814 POSTS
Hope they can sort it out, if not you are going to have headaches all over, lol.

Good luck.
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Wednesday, January 14th, 2009 AT 6:22 AM
Tiny
WILLV28
  • MEMBER
  • 22 POSTS
Well, this has turned into a big debacle. Finally, they replaced the speed sensor and "now the speed is being sent" but it is not being received. So yesterday they drove it to a Mitsubishi dealer. They said the speedometer head was broken and it needed to be sent out to be fixed. So that would leave me without the car until Tuesday.

I reaplced the entire cluster. Is it possible that the issue still existed and the cluster broke again? Might it be fixed if I put in a another cluster?
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Thursday, February 5th, 2009 AT 10:57 AM
Tiny
KHLOW2008
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Hi Bill,

Too bad my worse fears are confirmed, you have to start all over again.

It is possible you got a bad cluster or while installing it something gave way. It could be a design flaw where a mistake in installing could break the speedometer head.

If it is the head that is at fault, replacing with a good one should solve the problem. At least we know where we stand now.
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Friday, February 6th, 2009 AT 9:48 AM
Tiny
RLHANSEN123
  • MEMBER
  • 4 POSTS
How was this resolved? I am having the exact same problem. Tachometer works, speedometer does not, odometer does not add miles, but is visible. I have an aftermarket radio that has been installed for a while, though recently I took aftermarket amps out and reconnected original rear speakers about the time my tachometer stopped working.
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Wednesday, September 16th, 2009 AT 11:36 PM
Tiny
KHLOW2008
  • MECHANIC
  • 41,814 POSTS
Hi rlhansen123,

You might have the same symptoms but the cause could be something else.

Check/test the vehicle speed sensor first. Get a scan done to see if you can retrieve any trouble codes. Autozone provides free scanning services and let me know the exact code if any found.
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Thursday, September 17th, 2009 AT 8:34 AM
Tiny
RLHANSEN123
  • MEMBER
  • 4 POSTS
When in and made sure there were no lose wires in the radio area. After putting everything back together, everything is working properly.
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Saturday, September 19th, 2009 AT 6:17 PM
Tiny
PHATBOI
  • MEMBER
  • 3 POSTS
  • 2002 MITSUBISHI GALANT
Electrical problem
2002 Mitsubishi Galant 4 cyl Front Wheel Drive Automatic

I have read a number of other posts regarding speedometer not working.
What I am wondering is at the radio harness the yellow/black wire what should it show a ground or power? And if power what voltage?
This is the wire that is connected to a number of other modules including the cpu. I recieved the car with the wires bare and no radio. I saw the speedo work once
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Tuesday, December 11th, 2018 AT 12:50 PM (Merged)
Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,709 POSTS
After looking at the schematic, it runs through the CPU and other modules as you mentioned. When it goes through the CPU, it comes out to ground. Based on that, I would say it shouldn't have any power in it but rather is used as a ground. Here is the schematic. I hope it is big enough for you to see.


https://www.2carpros.com/forum/automotive_pictures/249084_5_47.jpg



Let me know if you have other questions. Also, there are two systems, one with an amp and one without. It does the same on both.
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Tuesday, December 11th, 2018 AT 12:50 PM (Merged)
Tiny
PHATBOI
  • MEMBER
  • 3 POSTS
So I tried grounding the wire and no change
My problem is the same as others that I have read, My speedo and odometer dont work.
I put another cluster in it and no change.
I put another transmission in it(mine was slipping)
no change.
I am left with a computer issue?
I hooked my scanner up to it on live feed and drove it and it didnt read a speed either.
What next, there was mention of a wire coming from the cpu to test?
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Tuesday, December 11th, 2018 AT 12:50 PM (Merged)
Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,709 POSTS
The only thing I can think of is the vehicle speed sensor. Have you checked that?
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Tuesday, December 11th, 2018 AT 12:50 PM (Merged)
Tiny
PHATBOI
  • MEMBER
  • 3 POSTS
There are technically 3 speed sensors
1 input for the cpu
1 output for the cpu
1 for the sppedometer cluster
if one of the cpu sensors were bad wouldnt it throw a code?
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Tuesday, December 11th, 2018 AT 12:50 PM (Merged)
Tiny
2692TROY
  • MEMBER
  • 1 POST
  • 2002 MITSUBISHI GALANT
  • 4 CYL
  • FWD
  • AUTOMATIC
  • 42,671 MILES
Help ? I have been working on a 2002 mitsu- galant. I have not been able to figure out why the speedo will not work and also ODO. It will not read how fast the vehicle goes or register the miles. It has 42,671 on the odo but does not read more miles and the speedo doen't work. I have replaced the input speed sensor and the output speed sensor on the transmission. Didn't change, replaced the speedo with another one from a salvage yard. Didn't work also. Mitsubushi dealer ship in town won't give me any help with a wiring schematic, I think it is a wiring problem in the wires to speedo, is it? If it is can any one help with what wires to test or how to get a wiring diagram
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Tuesday, December 11th, 2018 AT 12:50 PM (Merged)

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