P0717

DTC P0716 or P0717

Diagnostic Instructions

* Perform the Diagnostic System Check - Vehicle (Initial Inspection and Diagnostic Overview) prior to using this diagnostic procedure.
* Review Strategy Based Diagnosis (Initial Inspection and Diagnostic Overview) for an overview of the diagnostic approach.
* Diagnostic Procedure Instructions (Initial Inspection and Diagnostic Overview) provides an overview of each diagnostic category.



DTC Descriptors
DTC P0716
- Input Speed Sensor Performance

DTC P0717
- Input Speed Sensor Circuit Low Voltage




Diagnostic Fault Information






Typical Scan Tool Data






Circuit/System Description

The automatic transmission input speed sensor (ISS) is a permanent magnet with a coil of wire wound around. The ISS mounts in the case cover facing the reluctor wheel of the input shaft. As the reluctor wheel is driven by the turbine shaft, an AC signal is induced in the input speed sensor. Higher vehicle speeds induce a higher frequency and voltage at the sensor. There is a fixed air gap between the sensor and the teeth on the sensor reluctor wheel. The ISS input is used by the transmission control module (TCM) in order to control line pressure, torque converter clutch (TCC) apply and release, and transmission shift patterns. This sensor is also used to calculate the appropriate gear ratios and TCC slippage. This diagnostic indicates stuck, erratic, or intermittent conditions in the system.


Conditions for Running the DTC


P0716
* No TP sensor DTCs P0120 or P0220.
* No ISS DTC P0717.
* No OSS DTC P0722 or P0723.
* No 1-2 shift solenoid valve DTCs P0752, P0973, or P0974.
* The ISS is greater than 1050 RPM for at least 2 seconds.
* An increase in ISS is 500 RPM or less for at least 2 seconds.
* The calc. throttle position is 8 percent or more.
* The engine speed is greater than 500 RPM for 5 seconds.
* The vehicle speed is 16 km/h (10 mph) or greater.
* The engine torque is greater than 50 N.m (37 lb ft).



P0717
* No ISS DTC P0717.
* No OSS DTC P0722 or P0723.
* The engine speed is greater than 500 RPM for 5 seconds.
* The vehicle speed is 16 km/h (10 mph) or greater.
* The engine torque is greater than 50 N.m (37 lb ft).



Conditions for Setting the DTC

P0716

The input shaft speed changes by 1,000 RPM or more for 3.25 seconds.

P0717

The input shaft speed is less than 50 RPM for 4.5 seconds.


Action Taken When the DTC Sets

* DTCs P0716 and P0717 are type B DTCs.
* The TCM commands maximum line pressure.
* The TCM freezes transmission adaptive functions.
* The TCM calculates input speed based on engine speed and gear ratio.



Conditions for Clearing the DTC

DTCs P0716 and P0717 are type B DTCs.


Diagnostic Aids

* Road test the vehicle while monitoring the Transmission ISS parameter on the scan tool. The Transmission ISS parameter should vary with engine speed changes and not abruptly drop out.
* Inspect for an open or shorted AT ISS wire.
* Inspect for a disconnected AT ISS connector.
* Inspect for a faulty AT ISS.



Reference Information
Schematic Reference

Automatic Transmission Controls Schematics (Electrical Diagrams)
Connector End View Reference

Component Connector End Views (Connector Views)
Description and Operation

Electronic Component Description (Electronic Component Description) for input speed sensor information
Electrical Information Reference

* Circuit Testing (Component Tests and General Diagnostics)
* Connector Repairs (Component Tests and General Diagnostics)
* Testing for Intermittent Conditions and Poor Connections (Component Tests and General Diagnostics)
* Wiring Repairs (Component Tests and General Diagnostics)

DTC Type Reference

Powertrain Diagnostic Trouble Code (DTC) Type Definitions (Diagnostic Trouble Code Descriptions)
Scan Tool Reference

Control Module References (Programming and Relearning) for scan tool information
Special Tools

J 44152 Jumper Harness (20 pins)


Circuit/System Verification

1. Engine idling, observe the scan tool Transmission ISS parameter while varying the engine speed. The Transmission ISS parameter should change with the engine speed and not drop out.
2. Operate the vehicle within the Conditions for Running the DTC. You may also operate the vehicle within the conditions that you observed from the Freeze Frame/Failure Records data.



Circuit/System Testing


Important: Additional DTCs may set when disconnecting the automatic transmission inline 20-way connector.


1. Start the engine and ensure the Transmission ISS parameter on the scan tool is greater than 100 RPM.

• If the value is less than 100 RPM disconnect the AT inline 20-way connector and install the J 44152 Jumper Harness on the transmission side.

2. Measure the resistance between the ISS high signal circuit and the ISS low signal circuit of the J 44152 . The resistance should be between 625 and 835 ohms.

• If the value is greater than 835 ohms, test the ISS high signal circuit and the ISS low signal circuit for an open.
• If the value is less than 625 ohms, test the ISS high signal and the ISS low signal circuits for a shorted together condition.

3. Measure the resistance of the ISS high signal circuit to the transmission case. The resistance should be greater than 10K ohms.

• If the value is less than 10 ohms, replace the transmission wiring harness assembly.

4. Measure the resistance between the ISS high signal circuit and all other circuits of the J 44152 except the ISS low signal circuit. The resistance should be greater than 10K ohms.

• If the value is less than 10K ohms, replace the transmission wiring harness assembly.

5. Measure the resistance between the ISS low signal circuit and all other circuits of the J 44152 except the ISS high signal circuit. The resistance should be greater than 10K ohms.

• If the value is less than 10K ohms replace the transmission wiring harness assembly.

6. Remove the J 44152 from the transmission side and install on the engine side of the harness. Measure the resistance between the ISS high signal circuit and ground. The resistance should be greater than 10K ohms.

• If the resistance is less than 10K ohms, test the ISS high signal circuit for a short to ground.

7. Measure the resistance of the ISS high signal circuit between the TCM connector and the AT inline 20-way connector. The resistance should be less than 10 ohms.

• If the resistance is greater than 10 ohms, test the ISS high signal for an open.

8. Measure the resistance of the ISS low signal circuit between the TCM connector and the AT inline 20-way connector. The resistance should be less than 10 ohms.

• If the resistance is greater than 10 ohms, test the ISS low signal for an open.

9. Ignition ON, test the ISS high signal circuit for a short to voltage.

• If all circuit/connections test normal, test or replace the ISS.




Component Testing

Verify the ISS resistance is between 625-835 ohms.

If the resistance is not within the specified range, replace the ISS.



Repair Instructions

Perform the Diagnostic Repair Verification (Verification Tests) after completing the repair.

* Input Speed Sensor Removal (Overhaul) and Input Speed Sensor Installation (Overhaul)
* Control Module References (Programming and Relearning) for TCM replacement, setup, and programming
* Channel Plate and Gasket Removal (Overhaul) for ISS Replacement
* Side Cover/Gaskets, Disassemble, Assemble, Install (Overhaul) for ISS Replacement
* Control Valve Body Assembly Removal (Overhaul) for ISS Replacement