P0715 – Turbine shaft speed (TSS) sensor -circuit malfunction
Last Updated 2016-01-15
Ed.D, PhD Philosophy, BSME
|Code||Fault Location||Probable Cause|
|P0715|| Turbine shaft speed (TSS) sensor -circuit malfunction |
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|Wiring, TSS sensor, ECM/PCM!TCM|
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Table of Contents
- What Does Code P0715 Mean?
- What are the common causes of code P0715 ?
- What are the symptoms of code P0715 ?
- Codes Related to P0715
- Get Help with P0715
What Does Code P0715 Mean?
The automatic transmission TSS (Turbine Shaft Speed) or ISS (input shaft speed) sensor provides transmission input speed to the transmission control module (TCM). The ISS sensor can be a permanent magnet (PM) generator or a Hall-Effect switch (Creates an on–off square wave signal that is used directly by the PCM/TCM for speed detection). The TSS/ISS sensor mounts into the transmission case and maintains a slight air gap between the sensor and the forward clutch housing. T As the output shaft and internal gear rotate, the toothed rotor of the internal gear produces AC voltage as the rotor teeth pass through the magnetic field of the sensor of a digital signal if it is a Hall-Effect sensor. The AC voltage level or digital increases as the turbine shaft speed increases. The control module PCM or TCM converts the AC voltage of the PM generator into a digital signal. The TCM determines actual turbine speed using these signals and uses the input speed to calculate torque converter slip speed, and gear ratios.
Speed sensors measure the speeds of the input and output shafts or sometimes of other shaft speeds in the automatic transmission or transaxle. The output shaft speed sensor is often used to provide vehicle speed information to the control module and for adaptive learning. The output speed sensor (OSS) is also called the vehicle speed (VS) sensor and is used by the PCM for speedometer and cruise control operation as well as for transmission/transaxle operation and shift-related fault detection and if defective will set DTC related to cruise operation.
NOTE: Whenever diagnosing a 700 series DTC (Diagnostic Trouble Code) with a transmission, transfer case or other driveline components, check for a DTC under chassis and body systems, not just under “P” or powertrain/engine or emission control type codes. Module communications DTCs are “U” codes. These are most often found when looking for DTCs under chassis or body systems. Chassis related codes are labeled “C” and body system related codes are labeled “B” codes and these can cause drivetrain issues if they affect a sensor that is also used by the heating and air conditioning system.
Figure 1 TSS/ISS Circuit Wiring Diagram
DTC P0715 is detected when the control module TCM or ECM does not receive the right signal from the TSS/ISS sensor.
What are the common causes of code P0715 ?
- Defective TSS/ISS Sensor
- TSS/ISS Sensor harness damaged
- TSS/ISS Sensor short-to-voltage
- TSS/ISS Sensor short-to-ground
- TSS/ISS Sensor circuit poor electrical connection
What are the symptoms of code P0715 ?
- MIL (Malfunction Indicator Lamp [Check Engine & Service Engine Soon])lights on
- Up and downshift concerns
Codes Related to P0715
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I have a 2000 montero sport as well and it is throwing the p0715 code as well is this a hard fix ? I’ve checked all th wires externally and all are seem ok .if it is th sensor what will it entail to change ?
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Ola tenho um Ford fusion 2007 com problema p715 que ta me tirando o sono varias mecânicas e nenhuma consegue definir o que e e as que tentam resolver apagam a falha e logo volta alguem com este problema ?que saiba a solução?
I have a 2007 Lincoln MKX that has little wrench light that will come on in the dash and the car jerk a somewhat. I can put transmission fluid in it. The light goes away and is fine for a while. Have had it checked by a Ford dealershio, a transmission guy and another service department twice. They all said they couldn’t find a leak but the code PO715 came up on a computer check. Hiw difficult and costly is this repair?
I have a.mazda 3 and the code reader says p0715 I just changed the speed sensor a month ago and the check engine light came on again with that code again. Any suggestions? U think the part is a faulty part?
I have a 1999 jeep Cherokee sport that will start and run for a min, but then will die for no reason. It throws a p0715 and a p0122 code. Ive changed the fuel pump, coil, ecm, distributer, map sensor, and am tired of spending unneeded cash on trying to fix.please help
Hello I have a 2000 jeep Cherokee sport 4.0l straight 6. I have a P0715 code and can not get it to reset. I have replaced all three sensors on the transmission. I have checked the connectors and have voltage on the input and output sensor. My speedometer is working and the vehicle will shift good. I do have a issue with the engine missing going down the road. I can reset the code and it has stayed off up to 15 miles before it comes back on. Anything else I’m missing?
Did you ever find a solution to this, we also have a Jeep that is doing the same thing. We’ve cleaned all the ground points since, no one ever had; however we are still having the issue.
Regarding the misfiring, I don’t think that has anything to do with it, but you should definitely get it fixed.
You’ve checked for voltage at the sensor, but have you checked it back at the PCM? The easiest way to run a circuit check is to check for resistance from the PCM connector through the sensor and back. Disconnect the PCM and test for resistance across the terminals for the turbine shaft speed sensor. If you had voltage at the sensor but the signal isn’t getting back to the PCM, it’ll throw a circuit code.
You mentioned that it doesn’t come up for 15 miles, which makes me think it could be temperature-related, in which case I would suspect the sensor itself. Still, I would double-check the connectors and the circuit between the PCM and the sensor before condemning the sensor.
hi sir i rebulid 4l65oe and replace a new iss sensor but my car is 1-2 shift is harsh even 2-3 have bump and i get code p0700 and p0717 iss low voltagemy pump bushing are new is this tcm issu mean bad tcm pleas help thanks and sorry for my bad english 🙂
This discussion should be over on P0717, but the problem is that the transmission controller can’t see a signal from the transmission speed sensor. I think you need to start with a circuit check between the PCM and the sensor. There’s probably a broken wire somewhere or something is disconnected, especially since you mention a rebuild, so I’m thinking maybe there’s a cut wire or forgotten connection.