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Connection between neutral safety switch and speedometer

Speedometer is reading a higher speed than actually driving. Curious to know if the neutral safety switch is connected to the speedometer.

Posted by Anonymous on

6 Suggested Answers

6ya6ya
  • 2 Answers

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Posted on Jan 02, 2017

  • 217 Answers

SOURCE: 03 silverado neutral safety switch

possible but it can also be a range selecter switch problem. any work done on vehicle lately? pleas respone and i will try my best to help thanks.

Posted on Jan 31, 2009

autotherapis
  • 501 Answers

SOURCE: Where is the neutral safety switch located on 1998 Town & Country

It is built into the valve body of the transmission. It can be replaced, but it should be done by a pro. What are the symtoms that make you ask>

Posted on Aug 16, 2009

  • 436 Answers

SOURCE: removal and installation neutral safety switch,

the switch just threads in so all you have to do is unplug switch, turn counterclockwise till it is out and then thread new one in clockwise till it is tight, plug in harness and you are done.

Posted on Aug 30, 2009

ZJLimited
  • 17970 Answers

SOURCE: Looking for the neutral safety switch

Neutral Safety/Back-up Light Switch

This is a combination switch which controls both Neutral Safety and Back-up lamp circuits.

C6 Transmission


8290dff.jpg

C6 neutral start switch

  1. Disconnect the negative battery cable.
  2. Raise and safely support the vehicle on jackstands.
  3. Remove the downshift linkage rod return spring at the low-reverse servo cover.
  4. Coat the outer lever attaching nut with penetrating oil. Remove the nut and lever.
  5. Remove the 2 switch attaching bolts, disconnect the wiring at the connectors and remove the switch.
  6. Installation is the reverse of removal. Adjust the switch and tighten the bolts to 55-75 inch lbs. (6.2-8.5 Nm).
  7. Remove the jackstands and lower the vehicle.
  8. Connect the negative battery cable.
AOD Transmission

e7f4231.jpg

Removing the AOD neutral start switch
  1. Disconnect the negative battery cable.
  2. Raise and safely support the vehicle on jackstands.
  3. Disconnect the wiring from the switch.
  4. Using a deep socket, unscrew the switch.
  5. Installation is the reverse of removal. Tighten the switch to 10 ft. lbs. (14 Nm).
  6. Remove the jackstands and lower the vehicle.
  7. Connect the negative battery cable.
4R70W Transmission

2f68dfc.jpg


Removing the Manual Lever Position (MLP) sensor

As of 1994, the neutral safety switch is referred to as a Manual Lever Position Sensor (MLP).
  1. Disconnect the negative battery cable.
  2. Raise and safely support the vehicle on jackstands.
  3. Disengage the harness connector from the MLP sensor.
  4. Remove the 2 sensor attaching bolts and remove the sensor.
To install:
  1. Install the MLP sensor and install retaining bolts. Do not tighten, the sensor requires adjustment.
  2. Adjust the MLP sensor then tighten attaching screws to 80-100 inch lbs. (9-11 Nm).
  3. Remove the jackstands and lower the vehicle.
  4. Connect the negative battery cable.


ADJUSTMENT

C6 Transmission
  1. Hold the steering column transmission selector lever against the Neutral stop.
  2. Move the sliding block assembly on the neutral switch to the Neutral position and insert a 0.091 in. (2.3mm) gauge pin in the alignment hole on the terminal side of the switch.
  3. Move the switch assembly housing so that the sliding block contacts the actuating pin lever. Secure the switch to the outer tube of the steering column and remove the gauge pin.
  4. Check the operation of the switch. The engine should only start in Neutral and Park .

4R70W Transmission


4cc4151.jpg


Adjusting the MLP sensor

Park is the last detent when the manual control lever is full forward. Return 2 detents toward the output shaft for Neutral.
  1. Position the manual control lever in Neutral .
  2. Insert Gear Position Sensor Adjuster tool T93P-700 10-A or equivalent, into the slots.
  3. Align all 3 slots on the MLP sensor with 3 tabs on the tool.
  4. Tighten the attaching screws to 80-100 inch lbs. (9-11 Nm).

I hope help you. Good luck (rated this help).

Posted on Sep 18, 2009

  • 1 Answer

SOURCE: Neutral safety switch chevy silverado 02'

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Posted on Feb 26, 2010

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And yes you can bypass it, follow the clutch pedal up behind the dash, you'll find the switch. pull the plug and "short" the two connections(of the plug) with a piece of wire.

What makes you say it is "going" bad? Just curious, normally it'll just stop working!

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Not having more specific info as to the behavior of your vehicle it's hard to say. what the problem might be. Computer codes are only a place to startt.
The P0722 is for Output Speed Sensor 2 Circuit No Signal. This means that the transmission control module is not receiving a signal from the Output Speed Sensor.
I am assuming (based on this information) that your vehicle is front wheel drive and has an automatic transmission. If you have a different powertrain (i.e. quattro all wheel drive or a manual transmission), write back and let me know.
This P0722 is a common fault on front wheel drive automatic transmissions (called a CVT). The bad thing is that the output speed sensors are part of the transmission control module and the only way to repair that is to replace the transmission control module. The module is located inside the transmission. Expect to pay $1000 to $1500 for the module and another $700 to $900 for labor.
There is a possibility it could be the Neutral safety switch. They an get dirty and cause problems so spend a cople of dolars checking this before laying out the bigger bucks.
Testing Neutral Safety Switch

Required Tools:
Test Light/Voltage-meter
Wiring schematic
Neutral safety switch location (component location)

Test Procedure
Locate the neutral safety switch
Disconnect the wiring connector at the switch
Using a test light or volt-meter test for power at the wiring harness with the key in the "engine crank" or the gear shifter in the "reverse" position. (do not start the engine)
If power exists reconnect the neutral safety switch and probe outgoing wires at the connector.
If no outgoing power is present the switch has failed and needs to be replaced.
Tip : If the engine will not crank over with the car in "park" push down the brake pedal and try cranking the engine over with the car in "neutral". What you are doing is bypassing the "park" position in the switch and now are using the little used neutral circuit. If in neutral the engine starts the switch is probably bad.
Tip: Sometimes a neutral safety switch can become misadjusted. This switch adjustment can change due to normal wear of mechanism that controls switch slider.
Other complications can occur if there is a loose connection somewhere in the system. While this condition is not a shorted circuit problem, it is a condition that simply breaks the flow of electricity intermittently. To troubleshoot this problem consult a car repair manual to locate the wiring schematic for your car. Repair the broken or shorted connection as needed and recheck system. Electrical problems are less complicated when the proper information is available.
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