Question about 2002 Hyundai Santa Fe

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Speedometer and tachometer

Neither of them are working properly. they are both sporadic in nature. the tachometer either is at 0 or it works. the speedometer just goes up and down

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Both are in need of repair, nothing else will cause this kind of problem except the inner electronics of both instruments, they can be repaired by any authorized Hyundai electronics repair station, but it won't e cheap.

Posted on Nov 18, 2008

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1991 deville speedometer jumps from 0 to 40 sporadically and fuel data center bounces between option (avg., miles to empty,fuel used) even though the fuel level shows correctly. change oil light comes on...


Well I was going to say it sounds like a faulty transmission speed sensor, but the headlight circuit would not affect that.
Could be a short somewhere in the harness for the instrument cluster.

Aug 11, 2013 | 1991 Cadillac DeVille

1 Answer

My Tachometer works ,but my speedometer doesnt ? In mornings when cold it hesitates and misses, once it warms up it does great. Why ?


The hesitates and misses is probably a chock problem, especially since when it warms up, it does great.

Since you weren't very specific on your indications, I thought a general troubleshooting guide might be helpful to you. But you might want to look on ebay for a shop maintenance manual for your vehicle if you plan on keeping it for awhile and doing your own maintenance.

This answer is applicable for many BMWs in addition to the one listed below.

Q

The tach and speedo work most of the time, but sometimes work sporadically.


A
Here is a write-up on the initial steps in tracking down a speedometer and/or tachometer problem.
Applies to: E23, E24, E28, E30, E32, E34 with speed sensor units mounted in the differential housing cover.

1) Speedometer - The speed sensor may be faulty. The sensor is mounted in the differential cover. Remove the harness plug and remove the sensor. Clean the sensor and measure the resistance (should be 0.0 Ohms). If there is any resistance higher than 0.0 (zero Ohms), replace the sensor. If the resistance reads correct, reinstall the sensor.

2) The wiring at the connector plug for the speed sensor (in the differential housing) may be faulty and corroded .... pull the boot back from the plug housing and inspect the wires and the pins.

3) The actual speedometer and/or tachometer head may be faulty. It may have a loose connection within it or a cracked circuit board.

4) The speedometer or tachometer head may be loose on the main instrument circuit board (do the gauges change or move if you smack the top of the dash, above the gauges?). Remove the instrument cluster and check the mounting of the speedometer/tachometer to the circuit board. See the attached issues of our Fast Times newsletter for assistance in removing the instrument cluster, on E30 3-series models (see the articles on replacing the PC board and replacing the odometer gears for info on the removal of the instrument cluster).

Fall 2005 Fast Times Winter 2004/2005 Fast Times
DIY E30 PC Boards DIY Odometer Repair

2005_n405_newsletter.gif 2005_n105_newsletter.gif

5) The plug that carries the impulse signal into the instrument cluster may have loose contacts. The plug for the speedometer signal is located on the driver's side of the back of the instrument cluster (on the E30 chassis). If you remove the lower dash trim panel (the one above the driver's knees), you can reach up and touch the plug. It is in a vertical position and has up to 26 wires in it. If you wiggle the plug, while driving, and the speedo comes & goes, you have loose contacts in the plug connection.

6) You may have a problem with the service interval PC board and it's NiCad batteries. If your oil change and service interval lights can not be reset (or will not stay reset for an appropriate time period), the PC board is likely faulty. This can affect the various gauges, including the speedometer and tachometer. If the PC board is faulty, I would suggest replacing it (after checking the other areas noted above). See the attached Fast Times newsletter article on replacing the service interval PC board.

In your specific case, I would suspect that you need to replace the service interval PC-board, if your service reminder lights can not be reset or do not stay reset.

Jun 02, 2011 | 1997 BMW 7 Series

1 Answer

2005 Buick LeSabre tachometer not responding when engine is running. Tachometer stays on "0" when enige is running. Slight movement as acceleration increases; however needle barely moves as...


2005 BUICK LESABRE TACHOMETER DOES NOT REGISTER WHEN ENGINE IS RUNNING. SOMETIMES IT BARELY MOVES, THEN GOES BACK TO 0
SAME CAR HAD SPEEDOMETER QUIT, REPLACED WITH NEW SENSOR, DROVE ABOUT 1300 MILES AND IT QUIT AGAIN. CLEANED THE SENSOR, WORKS OK NOW.

Oct 30, 2010 | 2005 Buick LeSabre

1 Answer

2003 Silverado 4.8 V8. Speedometer and tachometer, as soon as underway, read past maximum. When engine is shut off guages do not return to "0"


Hi Norton,

What has happened is your speedometer and tachometer drive motors are failing inside your silverado instrument cluster. I see this very often in GM trucks, to fix the problem you need to have your instrument cluster rebuilt.

Check out this article that talks more about it http://drspeedometer.com/chevy-silverado-instrument-clusters-why-they-quite-working

Thanks,
Fred

Sep 27, 2010 | Chevrolet Silverado 1500 Cars & Trucks

2 Answers

Car speedo & odometer sometimes work OK, other times not at all.


Most likely a speed sensor is going bad (most cars and truck do not use mechanical speedometer cables anymore) most sensors are located near the differential in rwd cars or near the drive shaft on the transmission. Best bet is to get a Haynes manual for your car to help locate the speed sensor. Remove it and take it to the auto parts store so you can visually compare it to the replacement. Install the new speed sensor and it should restore your speedometer and odometer.

Aug 19, 2009 | 1996 Honda Civic

2 Answers

Tachometer and speedometer don't work - they go to the bottom and don't move


If by the bottom you mean 0 then this might not work but I had a similiar problem with my tachometer. It was starting around 4 rpm (instead of 0) and would move up and beyond 7 when I would accelerate. Found a post saying to put the car in reverse, turn the engine off and then try and start the car 3 times (in reverse). Amazingly this worked perfectly and reset the tachomoter. Might try this for your problem.

Jul 11, 2009 | 2003 Chevrolet TrailBlazer

1 Answer

Tachometer and Speedometer intermittently working


that is a double sided pc board.you need to take the pc board away from the cluster,and check the reverse side of the plugs for a broken ground.

Jul 04, 2009 | 1996 Volkswagen Jetta

1 Answer

Speedometer and Tachometer not working


check the vehicle speed sensor located on the transmission housing.

Apr 11, 2009 | 1992 Oldsmobile Custom Cruiser

1 Answer

Speedometer Works Sporadically on 5 spd.Manual 2.0SI-1986 Prelude


you can do what i do keep going to wrecking yard and buy one there but i will tell you the truth the speedometer is the problem it is a defect the dealer doesnt reconize this , when it stops working smach the top of it that works for me i think its a lubercation problem my self

Oct 10, 2008 | 1986 Honda Prelude

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