1993 Nissan Quest Broken VSS

Tiny
MIKS
  • MEMBER
  • 1993 NISSAN QUEST
  • 6 CYL
  • FWD
  • AUTOMATIC
  • 165,000 MILES
Hi,
My speedometer, odometer & cruise don't work. I have approx 5volts DC on VSS harness pin ref to gnd/neg. That said, I attempted to remove VSS to test by spinning spline thing and measuring AC across outputs terms, however it busted off. Guts of sensor are still inside trans. I tapped the guts (1/4-20) and put in a screw and used vise grips on screw as lever with jack underneath pushing up to hopefully pull out guts. Entire housing (approx 1.5inch diameter) began to come out with the screw/guts. Came out 1/4 inch, so I tapped back in flush with top of trans case.
What is that housing thing, and what happens if it comes all the way out? How do I get just the sensor guts out so that I can move forward?
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Saturday, May 30th, 2009 AT 11:43 AM

8 Replies

Tiny
IMPALASS
  • EXPERT
Hello -

Okay to make sure I am helping you correctly....is your model just the Quest, or the GXE or the XE? Also what is your engine size in liter?

I have attached the directions for removal and testing.............just to have with us.

Next, based off the pic, I am trying to understand what is broke off and what is left in the trans......

Is the part with the red circle still in the trans?

SPEED SENSOR
1. Remove speed sensor from transmission. See Fig. 3 . Turn speedometer pinion quickly and measure AC voltage across sensor terminals. If voltage does not toggle at about .5 volt AC, replace speed sensor.
2. Remove instrument connector. Measure AC voltage at connector terminals No. 32 and 30.
3. Turn ignition on. Spin speed sensor. If .5 volt AC is present, replace speedometer instrument. If .5 volt AC is not present, check continuity of related circuits and speed sensor. Repair as necessary.
CAUTION: Ensure pinion shaft is properly seated when installing speed sensor. Speed sensor thrusting key should fit into groove of pinion shaft.
Fig. 3: Testing Vehicle Speed Sensor
Courtesy of NISSAN MOTOR CO., U.S.A.


http://www.2carpros.com/forum/automotive_pictures/248015_f3_2.jpg




http://www.2carpros.com/forum/automotive_pictures/248015_Picture1_72.jpg

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Saturday, May 30th, 2009 AT 12:42 PM
Tiny
MIKS
  • MEMBER
Hi,
It is the GXE with 3.0 liter.

The spline thing in the red circle is still in there, however the metal stem or shaft is out. A brass bushing came out as well; that bushing was approx 3/8 inch diameter.

I made sure not to tap deeper than the length of the shaft.


http://www.2carpros.com/forum/automotive_pictures/362632_VSSbusted_2.jpg



http://www.2carpros.com/forum/automotive_pictures/362632_VSShousing_1.jpg

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Saturday, May 30th, 2009 AT 12:52 PM
Tiny
IMPALASS
  • EXPERT
Hello -

Thanks for the info and pic. Thats great.

Many times the spline is plastic. Others metal.

My suggestion. Jack the front up so there is no pressure on the transmission. Put in neutral.

Spray some penetrating fliud in there and let sit a sec.

Then try a magnet if metal or the screw again and gently wiggle to see if it will release from the opposing gears.

Let me know.
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Saturday, May 30th, 2009 AT 1:42 PM
Tiny
MIKS
  • MEMBER
What about the sensor housing? If I pull that out, what should I expect? Will I be able to get it back in? Can I drive the car without it? Will that open up the trans to leaking fluid?
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Saturday, May 30th, 2009 AT 3:01 PM
Tiny
IMPALASS
  • EXPERT
Hello -

I am not sure what to expect if you pull the housing out. Do you have the new VSS? The pic I looked at on line looks like the VSS just slides into the part in the trans.

My concern with driving it is the gear is basically loose and floating.

Did you try as I suggested to pull it out?

You shouldn't have any leaks.

I am going to ask one of the other moderators to take a look at this also to see what they think about the housing.

In the mean time. Again, did you try as I suggested?
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Saturday, May 30th, 2009 AT 4:29 PM
Tiny
IMPALASS
  • EXPERT
Hello -

Doesn't look like the other moderator is up. Sorry for the delay.I will request a couple of others.
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Tuesday, June 2nd, 2009 AT 7:48 PM
Tiny
KHLOW2008
  • EXPERT
From the diagram, the speed sensor and meter driven gear looks like 2 separate item for the model shown. There are different model sensors, some comes with driven gear as an assy while others are separated into 2 parts. The single assy type would be all black plastic and would come out as an assy.

If you pull the housing out, it would be the housing and the meter gear only. To pull it out, prying and twisting makes it easier. Check for any locking bolts at side of transaxle housing along meter gear position. Nissan tends to have the bolt to hold the meter gear. Do not worry about pulling it out, it would come out as an assy and installation is by plugging it in only.

Check for worn gears. If gears are worn, it would cause none or erratic speedometer functions. Always count the number od teeth and measure diameter of replacement parts, wrong part used would cause the gears to wear off prematurely.

When installing, do not force it in, gently twist and tap it in. If it is remove, trans fluid would splash out if driven.
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Wednesday, June 3rd, 2009 AT 7:50 AM
Tiny
IMPALASS
  • EXPERT
Hello -

Were you able to repair your vehicle?
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Wednesday, June 10th, 2009 AT 9:32 PM

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