Codes P0700 and P0715 How to Trouble Shoot and What to Look For

Tiny
JAMSFOWLER
  • MEMBER
  • 2004 CHRYSLER TOWN AND COUNTRY
  • 141,000 MILES
The car has shifted gear and engine reved up a couple of times while driving. If I pull over and shut off the engine, it returns to normal operating.

Yesterday engine light came on, but drove fine.

Had the codes checked out today. Gave two codes P0700 and P0715.


P0700

aa Transaxle control system fault
Explanation
aa ECM received a signal that the transaxle control module has a fault
Probable cause
aa1 - Shortened or open circuit within transaxle
aa2 - failure of transaxle control module


P0715

aa The ECM has detected that the input speed changed suddenly
probable cause

aa1 - Open or short circuit condition
aa2 - Poor electrical connection
aa3 - Faulty ISS

Is this one problem or more?

How does one effectively troubshoot to find the cause of the problem?

I would prefer to not replace everything if that can be avoided.
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Tuesday, August 28th, 2012 AT 6:15 PM

9 Replies

Tiny
KHLOW2008
  • EXPERT
P0700 is a notification code telling you an error has been detected.

P0715 is the main cause of your problem.

P0715-INPUT SPEED SENSOR ERROR

When Monitored and Set Condition:

When Monitored: The transmission gear ratio is monitored continuously while the transmission is in gear.

Set Condition: If there is an excessive change in the Input RPM in any gear.

Possible causes:

Input speed sensor signal circuit open.
Speed sensor ground circuit open.
Input speed sensor signal circuit short to ground.
Input speed sensor signal circuit short to voltage.
Speed sensor ground circuit short to voltage.
Input speed sensor.
Power-train control module.
Intermittent wiring and connectors.
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Tuesday, August 28th, 2012 AT 6:45 PM
Tiny
JAMSFOWLER
  • MEMBER
Thanks for the reply.

The current plan is to replace the input and output sensors. Hoping the inexpensive repair does the trick. The results we are hoping for is that the code clears, the check engine light goes off and the problem is corrected.

If that does not work, does it make sense that the problem is with the TCM? Would that be the next logical replacement?

Beyond that, what else might have to be considered?
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Wednesday, August 29th, 2012 AT 1:50 AM
Tiny
KHLOW2008
  • EXPERT
Before replacement of parts, you should test the circuitry to confirm if there are any open or shorted circuits.

Start by check the sensor connectors. Sometimes connectors gets contaminated by the presence of liquids or the terminals loosened up.

Replacing parts and hoping it solves the problem is not the correct way and it can be costly and time wasting.

Here is a guide and the transmission wiring diagrams so you can test the connections:

https://www.2carpros.com/articles/how-to-check-wiring

Check out the diagrams (below).

Please let us know what you find. We are interested to see what it is.

Cheers
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Wednesday, August 29th, 2012 AT 10:36 AM
Tiny
JAMSFOWLER
  • MEMBER
I checked the wiring and it was all okay so I replaced the input shaft speed sensor and everything started working okay. Here is the diagrams I used.

Thanks for your help.
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Wednesday, August 29th, 2012 AT 2:13 PM
Tiny
KHLOW2008
  • EXPERT
Nice work, we are here to help, please use 2CarPros anytime.

Cheers
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Thursday, August 30th, 2012 AT 8:00 AM
Tiny
INGRID1234
  • MEMBER
JAMSFOWLER, would you please forward the procedure you got from KHLOW2008 to me also. I will appreciate it greatly. I have the same trouble with my Chrysler Town and Country.
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Sunday, April 29th, 2018 AT 11:07 AM
Tiny
KEN
  • ADMIN
Hello,

It looks like the input speed sensor is bad and needs to be replaced. Here is the location.

Check out the diagrams (below).

Please let us know what you find.

Cheers, Ken
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Tuesday, May 1st, 2018 AT 11:24 AM
Tiny
INGRID1234
  • MEMBER
Hi Ken, I replaced the input speed sensor but the problem has not gone away. If anything, it feels even worse. Do I need to replace the TCM too?
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Wednesday, May 9th, 2018 AT 5:39 PM
Tiny
KEN
  • ADMIN
Okay, then itbis going to be the connection or the computer. To determine which follow this wiring guides it show how to test.

https://www.2carpros.com/articles/how-to-check-wiring

Here are the wiring diagrams for the computer/engine/transmission.

Check out the diagrams (below). Please let us know what you find.

Cheers, Ken
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Thursday, May 10th, 2018 AT 4:25 PM

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