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How can i test my turbine speed sensor to determine if it is bad?????

My transmission skip third gear!!!!!

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  • Cars & Trucks Master
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Hi Saul:
Make sure the TSS sensor connector is good. Since you replaced the engine it is possible the wires/pins in the connector are loose or bad. I have seen where the wires break inside the insulation at the connector.You could have a bad TSS sensor (200-400 ohms good), if you have a multi meter we can check the circuits too. I would check the connector and then clear the code , test drive and see if it comes back. The PCM uses this sensor to control shift patterns so a fault is stored in the PCM. P0715 is for a loss of TSS signal during operation.

We can check the continuity but that will only show if there is high resistance. If there is a wire about to break(instead of 15 strands connected 3 or 4) we need to load the circuit or wire. If we put 12 volts through the wires(disconnected from the sensor and PCM of course) and we use a light bulb as a load if the wire is bad the bulb will be dim. I would start with an ohm check of the sensor and a close inspection of the connector.

We start with an ohm test on the sensor and then continuity test the circuit. Then we load the circuit. I have had the wires break as I disconnected the connector or tugged on the wires at the connector.

how can i test my turbine speed sensor to determin - 2_21_2012_6_09_11_pm.gif

Copy of that bulletin...
May 15, 2001

Applies To:
1996-97 Accord L4 - ALL with A/T
1996-97 Odyssey - ALL
MIL Comes On With A/T DTC P0715

The MIL comes on, and A/T DTC P0715 (problem in the mainshaft speed sensor circuit) is set.

Retrieve and record the A/T freeze data with the PGM Tester. Make sure you record the freeze data values on the repair order. Refer to DIAGNOSIS to determine which of these repair actions is needed:
* Replace the PCM
* Flush the A/T
* Replace the A/T
* Troubleshoot the mainshaft speed sensor circuit
* Troubleshoot an engine problem

Hope this helps; also keep in mind that your feedback is important and I`ll appreciate your time and consideration if you leave some testimonial comment about this answer.

Thank you for using FixYa, have a nice day.

Posted on Feb 21, 2012


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Posted on Jan 02, 2017

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SOURCE: Speed Sensor

The Speed sensor on your Honda Accord 97.
Is located on the Transmission.
If you follow the Lower Radiator hose from the rad to the engine.
The hose end on the Thermostat housing.
OK.. Just on direction of the thermostat housing .
Under the housing you Will see on the transmission the Speed sensor, with a connector of 3 wires. Is the only sensor at this
Part of the Transmission..

Ok. I hope this work on your question.
Thank you for use fixya..

Posted on Sep 09, 2008

  • 512 Answers

SOURCE: Transmission won't shift out of 1st gear

the output spped sensor is on the drivers side rear of the transmission case..its a 2 wire connector..the wires are dark bluewith a black tracer and light green with a white tracer

Posted on Oct 01, 2008

  • 316 Answers

SOURCE: input/turbine speed sensor circuit

Your speed sensor, is located on top of the transaxle, near the starter. To access it, remove the battery, then remove the battery tray (4 10mm bolts). You will see wires coming from the lower oxygen sensor, and they snap into the bracket that holds the speed sensor in place. The actual speed sensor has a 2 wire clip on it, and is held in place by the bracket and a 10mm bolt.

Posted on Apr 20, 2009

  • 412 Answers

SOURCE: transmission codes:


Posted on Jul 07, 2009

  • 501 Answers


If you google 97honda input speed sensor you will find several pictures. (Go to google images and input the above).

IF your input speed sensor goes bad the trans controll unit see's an "incorrect gear ratio".

Check your fluid too. If it is clean, you probably do not have a Major problem I have been rebuilding transmissions since the 80's and only stopped in 06. I have had many that only needed a new sensor like the input or output speed sensor. Try removing the input first and clean off the magnet. It is a pulse width modulator that uses a magnet with lands of metal passing through the magnetic field and the computer counts the pulse made by a collapsing field to determine the speed of the input drum. It compares it to what gear it is in and what the output speed is and if there is a problem it will set the codes you see.

Sometimes find metal from wear in the unit will accumulate on the magnet interfering with the input. Other times the sensor just fails, either way, it is usually not bad unless something is tearing up in the unit to cause a lot of metal to adhere to the mag.

Hope this helps

Posted on Sep 02, 2009


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1 Answer

Where could the turbine shaft sensor be on a ax4n tranny?i bought a manual and it is no help...

There is one at the input shaft and one at the output shaft. I could help if you gave me the code. This car has many transmission issues, you likely do have a slipping transmission, you don't fee it but the computer senses it through the turbine speed sensors.

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2006 Jeep Grand Cherokee. DTC P2767. Is the probable cause in the transmission or external?

the code means.
to do the tests listed in the fsm. book, not guess.
we do the tests, and find out if the cause in in the transmission
the TCM or the TCM sensors or the solenoid drivers or solenoids
or the actual transmission internals.
why guess? why ask folks to guess. who are blind.?
ever seen the book, and read , the chapter on A/t trans on car tests? or
wk jeep


i guessed drive line... so....

the book hints at....
- Faulty Input Speed Sensor 2 ,.is dead.
- Input Speed Sensor harness is open or shorted
- Input Speed Sensor circuit poor electrical connection

The Input Speed Sensor 2 is one of the two hall effect speed sensors that are used by the Transmission Control Module (TCM) to calculate the transmissions turbine speed. Since the turbine speed could not be measured directly, two of the drive elements are measured. Two input speed sensors are required because both elements are not active in all gears.

May 14, 2015 | Jeep Cars & Trucks

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I am looking for a ECU pinout or a Diagram. I am throwing a "turbine overspeed" code (P0716) on a non turbo car. Also P0721 and P0705 On second ECU with the same issue.

Hello. You are confusing the turbine over speed control sensor module of the car's transmission, with a turbo charger- a forced air induction device, of a car's engine. One has nothing to do with the other.

The turbine over-speed control module is basically a sensor that reads the speed of the transmission's input shaft (torque converter) in relation to the speed of the output shaft- transmission speed ratio/gear.

Simply put- when the P0716 error code displays, it means that the ECM has detected the value(s) of the input sensor as being out of range, like being too high or too low; or that there is some bad wiring issue in the circuit.

When this happens, the subsequent P0721 output speed sensor and P0705 transmission range sensor circuit malfunction error codes appear- and does not necessarily mean that the entire transmission components (electronic modules, sensors, or mechanical parts) have malfunctioned leading to a major transmission overhaul.

It is most likely that the Input Turbine Speed sensor needs to be replaced. Take the car to a well qualified SAE certified transmission specialist who has precise diagnostic and transmission control readers and are able to reset the computerized transmission modules once the repair is made.

Feb 20, 2015 | 2006 Kia Sorento

1 Answer

Location of trans speed sensor 3 pin location 2004 solar v6 automatic p0500 speed sensor trouble code

no what matters is if the pulses are good.
and the transmission not slipping.
the TCM is not genious level yet.

are you asking what P0500 means.
or want us to tell you all things stated in fSM for this code.
what? guessing you can do .
ever heard of (DIY)
ever read that page on 500s?
i guess not.
3.3L v6 ?
Trouble Code Conditions: P0500
The ECM detects following conditions simultaneously for 2 secnonds (1 trip detection logic):
No SPD (speed sensor) signal while ECM detects NC (trans­mission counter gear) signal is more than 300 RPM Park/Neutral position switch is OFF (When shift lever is in other than P and N positions) Possible Causes:
  • Open or short in speed sensor circuit
  • Speed sensor
  • Combination meter
  • ECM
  • Skid control ECU
im trying to decode that too, the sensors
are called, C3 counter gear sensor, and Turbin T3 sensor
but the book keeps changing names in the book.

i think it means, counter gear shows correct RPM
but the turbine gear sensor T3 is dead.
while in gear. is too hard for them to say. so i said it.
and my guess, moving,
after all transmission slip moving
in fact i can scan your car and prove that
i scan it in park, then indrive, no moving
got 500s, or are 500 happening flogging engine.

but the ECU signal is either dead for turbine sensor or is way too slow. see incongruity from 300+ rpm on counter gear.

500 means dead, not intermittant.
i looked at all codes for turbine.

so my best guess (no real fsm only alldata)
is Turbine is the clutch sensor. (input rpm to trans-clutch)
and counter gear is tail shaft sensor.? (output speed)
so the front clutch sensor is dead
or being grounded out, or is not connected, (rusty conns?)

Most FSM made do a poor job, at showing possible bad parts.

here is better
  1. the sensor is weak or dead
  2. the sensor connections are bad.
  3. the sensor, signals do not arrive at the PCM /TCM, due to bad wires, or anything on that line shorting that line out.
  4. better (yes?, this is electronics) no a parts swap game.

if the car drives ok then the trans does not slip.
the TCM sees both ends and can detect, bad sensors or gross slip.
i think it means bad sensor. in this case only.

what does this mean?
  1. having difficulty locating it
can buy one, find one, can't insert it, or?

Feb 13, 2015 | 2004 Toyota Solara

1 Answer

Location of input/turbine speed sensor

Some are on the outside of the transmission, some are on the inside. No year,make and model.

Nov 14, 2014 | Cars & Trucks

1 Answer

O/d off light is flashing

Needed transmission oil replace. If problem came back, replace the the turbine speed sensor (or transmission speed sensor, same thing). I fixed the O/D light flashing problem, but I did it in reverse order. Hopefully it is just dirty transmission oil that cause the problem and you can save yourself from replacing the turbine speed sensor.

Jan 17, 2014 | 1996 Ford Contour

1 Answer


P0722: Transmission speed signal missing.

There is a turbine speed sensor that detects and reports the speed of the transmission shaft to the computer to help determine shift points. Sometimes this duty is shared by the VSS (vehicle speed sensor) but if your speedometer still works, then the VSS is good and you should replace the TSS (turbine speed sensor). I would guess you are either stuck in 1st gear all the time or your transmission shifts erratically.

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Trouble code for Turbine Speed Sensor input shaft no signal & trans won't shift from 2nd gear started out being intermittent now stuck in 2nd.

You will need your transmission tested or checked out

The Turbine Sensor may be the one closest to the engine
and is any indication of input speed from the converter,
vs: the other trans sensors that are farther back on the case.

Now the issue is, can you get your hand between the floor pan
to change it,if it is bad.

Dec 03, 2010 | 2006 Mercedes-Benz CLK 500

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Transmission code error P2716

The computer wants to know if the transmission is working properly. So it reads the speed of the input shaft and compares it to the speed of the output shaft. It knows which gear you're in because it commanded the transmission to shift into that gear. The turbine speed refers to the torque converter. That's the device that transfers power from the engine to the transmission. Think of two fans facing each other. Turn on one fan and the blades on the other fan will spin. The fan that ISN'T turned on is the turbine. So, with the input shaft or turbine speed, the gear selection, and the output speed, the computer can calculate how efficiently the transmission is working. If the speed is off, it knows that something is slipping inside the transmission. It can then try to boost the fluid pressure to compensate. If that doesn't work, it sets a different trouble code, usually a P0716 code means that the computer has detected a value for the input sensor that's either out of range (way too high or too low), or there's a circuit issue (bad wiring, etc. Should probably get it to a repair shop ASAP before damage is done.

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Code p0733, p0717

P0733 Trany Ratio in gear 3. This is a trany fault code and the first thing you should check is your tps sensor using your DVOM meter. Measuring the voltages between idle and WOT (wide open throttle), there should be no interruption in the reading (or glitches). Otherwise, it can play havoc to your shifting cycles which can cause this code P0733. If there are glitches, replace the tps sensor right away and reset the code. If trany is suspected, most common fix for this points to a defective valve body. To verify, it can be done by using a scanner which has the capacity to command the trany solenoids so it can be tested at various trany operating pressures. P0717 is a improper signal from your pules generator A. Which is a the turbine speed sensor on the transmission, You have two of them, the A reads the speed of the input shaft of the transmission and the B sensor reads the output shaft of the transmission. I know with the P0717 it will put the transmission in the limp mode and will not shift past 3rd gear and if your running the transmission hard on third you may have triggered the P0733 which is the 3rd gear slipping. Check the transmission fluid and make sure you have not burnt the fluid, if the transmission fluid is burnt you may want to have a transmission repair shop replace the turbine speed sensor (Pules Generator A) and the fluid and filter. Cross the fingers and hope the transmission was not ran to hard in third causing damage to the third gear clutch packs. Good luck and keep me posted, be glad to help.

Jun 15, 2009 | 2002 Hyundai Accent

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