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Speedometer and odometer not working told by previous owner he replaces vss also one sensor at rear of transfer case is not plugged in is this a common problem if so what is common fix?

Vss was sopposidly replaced

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What make and model? It is possible that the unplugged sensor is for the speedo / odo, since the pulses for the speedo and hence the odo is picked up from the final drive on the transmission.
Note, it is only a possibility, we need more information.

Posted on Dec 01, 2014

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Speedometer won't work in 97 Astro, replaced sensor..help


What sensor ? VSS - vehicle speed sensor on the transmission ? Colud be the speedometer gauge is bad . Do you know how the insturment cluster get's that info. ? Your best bet , take it to a qualified repair shop . You have no idea how it works , don't have the diagnostic tool's to find the problem ,so do yourself a favor . The first step would be to hook up a factory or professional type scan tool to see if the VSS info is seen in the VCM ,then to see what the VCM is sending over the serial data network . Do you know what a serial data communication network is ? VCM is vehicle control module .
Speedometer and Odometer Circuit Description
An electronic speedometer is standard equipment on all models. Integrated circuits control the air core speedometer and the stepper motor odometer. Removable bulb and socket assemblies provide the lighting. The socket assembly inserts into the back of the instrument cluster.
The speedometer system consists of the following components:
• The instrument cluster
• The vehicle speed sensor (VSS) calibrator
• The VSS
• The related wiring
The VSS calibration is part of the VCM that changes the analog output from the VSS to a digital signal. The digital signal contains 4000 pulses per mile (PPM) for the instrument cluster. The VCM sends the signal to the speedometer through CKT 389. The VSS calibration matches to the final drive and the tire size of each vehicle. Reprogram the VCM with the proper VSS calibration if the final drive or tire size changes for any reason. The signal will not be accurate for the proper speedometer/odometer operation if the necessary change is not made. An incorrect VSS calibrator can also affect the following components:
• The antilock brakes
• The vehicle control module (VCM)
The cruise control systems
The VSS calibration is programmed into the VCM. Do not service the VSS calibrator separately.
The VSS is a permanent magnet signal generator that sends an analog signal proportional to the propeller shaft speed to the VCM. The VSS mounts to the transmission tailshaft extension housing on the two-wheel drive model. The VSS mounts to the transfer case output shaft housing on the all-wheel drive models.


Use a Scan Tool in order to read the vehicle control module (VCM) diagnostic trouble codes.
Are there any vehicle speed sensor related trouble codes?
Testing an not guessing fixes problems

Sep 19, 2017 | 1997 Chevrolet Astro

1 Answer

I cannot locate the vehicle speed sensor. I found two sensors on the transfer case and on the transmission but was told neither was the vss. Please advise


Mounted to the speedometer cable located at the rear driver's side of the transmission, or, possibly incorporated into the instrument cluster (Ford switched to doing this at some point prior to 1994 model year, which did not have traditional VSS.)

Feb 16, 2016 | Cars & Trucks

1 Answer

Speedometer quick qorking 2004 usuzu rodeo 3.5


did you connect any OBD2 scan tool and look.
the PCM will tell you if the VSS is dead. flat out tell you.
why no scan the PCM and not work blind./??
the tool is cheap to buy, rent or loan. (or any mech will just do it for free as good will. (no dealers here).

ok, Rodeo, 3.5 2004
3.5L is wrong, dead wrong, 3.2 is my guess.
see here, see country and engines, neither i can guess.
http://en.wikipedia.org/wiki/Isuzu_Wizard
which engine ReALLY ?
Not the Rodeo SPORT , answers below are 3.2L non sport.

Speedo dead. what about Odometer.?????
is replace sensor a statement or a question?
replaced with a "d"
my guess it was a question. and guess.
step 1 and 2 all electrical problems.
1: test the fuses, related. Fuse #11?
2: battery fully charged, at 12.6vdc, not 10v, at 10 electronincs dont work right. fix battery. or charge system.

now how does the 04 work.?
the VSS sensor feed data to many things.
PCM (for fueling data)
Speedometer
Odometer
ABS
supension control unit.
cruise control
etc.

if the odometer works its not the VSS.
see?
the cluster is 100% electronic, ....

VSS is input to Speedo and the odometer is electronic inside
same, so if VSS is bad, both die.
fact.
if only the speedo is bad, then it is bad.

scan the PCM and not guess.
the PCM reports a bad VSS, with 100% assurance.

May 25, 2014 | 2004 Isuzu Rodeo

1 Answer

22RE TOYOTA 1993 PICKUP BASE MODEL 4WD 4CYI 5 SPEED MANUAL


its located on transfer case rear end near propeller shaft , have 3 wires plug

Jun 27, 2017 | 1993 Toyota Pickup

1 Answer

05 Kia Sedona speedometer not working


Hey I had the same prob exactly and turns out the small spedo that was transferred to the vss was not done correctly and I had to get a new vss and transfer the metal rod with the small plastic teeth carefully and correctly.

May 30, 2012 | 2004 Kia Sedona

1 Answer

I cant find the location of the speed sensor for a 1996 Mazda B3000 pick up with auto trans


Look around the auto transmission for wires that lead to the VSS (Vehicle Speed Sensor):


    1. Remove the flywheel to converter attaching nuts. Use a socket and breaker bar on the crankshaft pulley attaching bolt. Rotate the pulley clockwise as viewed from the front to gain access to each of the nuts.
    2. NOTE: On belt driven overhead cam engines, never rotate the pulley in a counterclockwise direction as viewed from the front. Remove the Vehicle Speed Sensor (VSS) clamp retaining bolt . . .
    1. 89687p11.jpg
    1. . . . then pull the VSS sensor from the transfer case (4WD) or extension housing (2WD)
    1. 89687p12.jpg

    1. Remove the speedometer cable and/or vehicle speed sensor from the transfer case (4WD) or extension housing (2WD).
    2. On 2WD vehicles, scribe a mark indexing the driveshaft to the rear axle flange. Remove the driveshaft.
    1. On 4WD vehicles, remove the transfer case.
    1. Fig. 3: Speedometer cable connection
    2. 85557046.gif
  • Jul 05, 2010 | 1996 Mazda Pickup

    2 Answers

    Speedometer works fine but no odometer or trip



    You need to replace the VSS or vehicle speed sensor. Located on LH, lefthand rear of transmission.

    Sheilah

    Feb 11, 2010 | 1993 Ford Thunderbird

    2 Answers

    No overdrive or speedo


    Gearbox speed sensor unit has failed .

    Aug 23, 2009 | 1993 Isuzu Trooper

    3 Answers

    Speedometer and odometer dont work on ford f-250 1992 7.5 lt 2 wheel drive


    INSPECT YOUR SPEEDO CABLE, IS IT BROKEN?????, IF NOT THEN IT'S YOUR SPEEDO HEAD BROKEN....IF YOURS IS ELECTRONIC THEN CHECK THE SENSOR AT THE TRANS "VSS" SENSOR...WITH OUT TEST EQUIP. JUST REPLACE IT AND RETEST.....gl

    Jul 10, 2009 | 1992 Ford F250

    2 Answers

    Speedometer/Odometer works only intermittently


    You need to replace the speedometer gear. Its on the passenger side of transmission at the rear, not the magnetic sensor on top. That one is for the computer not the speedometer. Unscrew the sensor and unbolt the gear housing to get to it. I worked for an Isuzu dealer and have sold many of these gears. You can go to www.myisuzuparts.com section 2-25

    Jun 02, 2009 | 1999 Isuzu Rodeo

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