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

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.

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

Nice work, we are here to help, please use 2CarPros anytime.

Cheers

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

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

Nice work, we are here to help, please use 2CarPros anytime.

Cheers, Ken

This does sounds TCM related because both sensor monitoring system went out at the same time here is the location so you can check the connector for corrosion and replace it if the connections are clean. Here is the quick relearn and location below

QUICK LEARN
The Quick Learn function customizes adaptive parameters of the control module to the transmission characteristics of a vehicle. This gives the customer improved "as received" shift quality compared to the initial parameters stored in the control module.

Notes about Quick Learn Features

The nature of the Quick Learn function requires that certain features must be taken into consideration.
- Quick Learn should generally not be used as a repair procedure unless directed by a repair or diagnostic procedure. If the transmission system is exhibiting a problem that you think is caused by an invalid CVI, you should try to relearn the value by performing the appropriate driving maneuvers. In most cases, if Quick Learn makes a vehicle shift better, the vehicle will return with the same problem.
- Before performing Quick Learn, it is imperative that the vehicle be shifted into OD with the engine running and the oil level set to the correct level. This step will purge air from the clutch circuits to prevent erroneous clutch volume values, which could cause poor initial shift quality.
- If a new control module is installed on a vehicle with a HOT engine, Quick Learn will cause the control module to report a cold calculated oil temperature. This requires monitoring the calculated oil temperature using the DRBIII. If the temperature is below 15 C(60° F), the transmission must be run at idle or driven in gear until the temperature goes above 15 C (60° F). If the temperature is above 93C (200° F), the transmission must cool to below 93 C (200° F).
- First gear is engaged in overdrive after Quick Learn is completed. Place the vehicle in park after performing Quick Learn.

The Quick Learn function should be performed:
- Upon installation of a new service control module
- After replacement or rebuild of internal transmission components or the torque converter
- If one or more of the clutch volumes indexes (CVI's) contain skewed readings because of abnormal conditions.

To perform the Quick Learn procedure, the following conditions must be met.
- It is imperative that the vehicle be shifted into OD with the engine running and the oil level set to the correct level. This step will purge the air in the clutch circuits to prevent erroneous clutch volume values, which could cause poor initial shift quality.
- Place the selector lever in neutral.
- The brakes must be applied.
- The engine must be idling.
- The throttle angle (TP sensor) must be less than 3 degrees.
- The shift lever position must stay in neutral until prompted to shift into OD.
- The shift lever must stay in OD after the "Shift to Overdrive" prompt until the DRBIII indicates the procedure is complete.
- The oil temperature must be between 15 C (60°) and 93 C (200° F).

NOTE: The above conditions must be maintained during the procedure to keep the procedure from being aborted.

The Quick Learn procedure is performed with the DRBIII by selecting "Transmission" system then "Miscellaneous" functions, then "Quick Learn". Follow the procedure instructions displayed on the DRBIII.

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