P0717
DTC P0716 or P0717
Diagnostic Instructions
* Perform theDiagnostic System Check - Vehicle (Initial Inspection and Diagnostic Overview) prior to using this diagnostic procedure.
* ReviewStrategy 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
- Turbine Input Speed Sensor Performance
DTC P0717
- Turbine Input Speed Low
Circuit/System Description
The transmission turbine speed sensor is a permanent magnet surrounded by a coil of wire that is mounted to the transmission case. This sensor is positioned next to the PTO drive gear or tone wheel that is attached to 1-2-3-4-5-6 Clutch Piston Housing. The housing rotates with the torque converter turbine so that the gear teeth on the PTO or bars on the tone wheel cross the magnetic field and generates an AC current. The voltage output and frequency generated by the sensor will vary as the gear or tone wheel changes speed. The speed sensor signal wires are twisted to cancel magnetically induced fields. The TCM changes the speed sensor analog signal into a digital signal.
Conditions for Running the DTC
P0716
* DTCs P0717, P0721, or P0722 are not active.
* A shift is not in progress.
* The engine speed is between 200-7500 RPM.
* The range attained is not neutral.
P0717
* DTCs P0721, P0722, P0729, P0731, P0732, P0733, P0734, P0735, and P0736 are not active.
* A shift is not in progress.
* The engine speed is between 200-7500 RPM.
* The range attained is not neutral.
Conditions for Setting the DTC
P0716 Condition 1
The DTC will set if an unrealistic change in turbine speed is observed.
P0716 Condition 2
The DTC will set if a noisy turbine speed signal is detected.
P0717 Condition 1
The DTC will set if an unrealistic change in turbine speed is observed.
P0717 Condition 2
The DTC will set if the TCM detects an unrealistic low value of turbine speed when the output speed is greater than 500 RPM.
Action Taken When the DTC Sets
P0716
* The TCM requests the ECM to illuminate the malfunction indicator lamp (MIL).
* The transmission locks in current range.
* While diagnostic response is active, if the shift selector is moved to NEUTRAL, the transmission will shift to NEUTRAL. If the shift selector is moved to REVERSE, the transmission will shift to REVERSE. If the shift selector is moved to a forward range, the transmission will shift to fourth range.
* The TCM inhibits torque converter clutch (TCC) engagement.
* DTC P0716 is stored in TCM history.
P0717
* The TCM requests the ECM to illuminate the MIL.
* The transmission locks in current range.
* While diagnostic response is active, if the shift selector is moved to NEUTRAL, the transmission will shift to NEUTRAL. If the shift selector is moved to REVERSE, the transmission will shift to REVERSE. If the shift selector is moved to a forward range, the transmission will shift to fourth range.
* The TCM inhibits TCC engagement.
* DTC P0717 is stored in TCM history.
Conditions for Clearing the DTC
DTCs P0716 and P0717 are Type A DTCs.
Diagnostic Aids
You will have to drive the vehicle in order to experience a condition.
Reference Information
Schematic Reference
Automatic Transmission Controls Schematics (Electrical Diagrams)
Connector End View Reference
Component Connector End Views (Connector Views)
Description and Operation
* Transmission General Description (Transmission General Description)
* Transmission Component and System Description (Transmission Component and System Description)
* Electronic Component Description (Electronic Component Description)
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 38522 - Variable Signal Generator
Circuit/System Verification
1. Engine running, transmission in PARK, use the scan tool to observe the turbine speed while varying the engine speed. The transmission turbine speed parameter should vary with the engine speed.
2. Operate the vehicle within the Conditions for Running the DTC to verify the DTC does not reset. You may also operate the vehicle within the conditions that you observed from the Freeze Frame/Failure Records data.
Circuit/System Testing
Note
You must perform the Circuit/System Verification first.
1. Ignition OFF, remove the turbine speed sensor connector.
2. Connect the J 38522 - generator to the turbine speed sensor circuit, terminals A and B.
3. Adjust the J 38522 - generator to 30 V, frequency to 1K Hz and duty cycle to 50 percent.
4. Ignition ON, engine OFF, use a scan tool to verify the Turbine Speed parameter is between 900 to 1000 RPM.
• If not the expected value, check the turbine speed signal and ground circuits for an open/high resistance, short to ground, or a short to voltage. If circuits test normal, replace the TCM. Refer to Control Module References (Programming and Relearning) for TCM replacement, setup, and programming.
5. Test or replace the turbine speed sensor. Refer to Speed Sensor Replacement (Service and Repair) .
Component Testing
Static Testing
Note
You must perform the Circuit/System Testing first.
1. Ignition OFF, remove the turbine speed sensor. Refer to Speed Sensor Replacement (Service and Repair) .
2. Test for resistance between terminal A and terminal B of the turbine speed sensor. See the Speed Sensor table, refer toTemperature Versus Resistance (Transmission Fluid Temperature Sensor) (Temperature Versus Resistance (Transmission Fluid Temperature Sensor))Temperature Versus Resistance (Speed Sensor) (Temperature Versus Resistance (Speed Sensor))Temperature Versus Resistance (Solenoid) (Temperature Versus Resistance (Solenoid)) .
• If not within the specified range, replace the speed sensor.
Repair Instructions
Perform theDiagnostic Repair Verification (Verification Tests) after completing the diagnostic procedure.
* Wiring Harness Replacement (Service and Repair)
* Speed Sensor Replacement (Service and Repair)
* Control Module References (Programming and Relearning) for TCM replacement, setup, and programming
Repair Verification
If another DTC is present, refer toDiagnostic Trouble Code (DTC) List - Vehicle (Diagnostic Trouble Code Descriptions) and perform the appropriate diagnostic procedure.