P1719

DTC P1719

Diagnostic Instructions
^ Perform the [Diagnostic System Check - Vehicle Diagnostic Information] prior to using this diagnostic procedure.
^ Review [Strategy Based Diagnosis] for an overview of the diagnostic approach. Strategy Based Diagnosis
^ [Diagnostic Procedure Instructions - Vehicle Diagnostic Information] provides an overview of each diagnostic category. Diagnostic Procedure Instructions - Vehicle Diagnostic Information

DTC Descriptor
DTC P1719 Torque Delivered Signal - Unusual Shifting

Circuit/System Description
The transmission control module (TCM) calculates last shift status based on data from the input and output speed sensors. The TCM measures the amount of time required to complete each shift.

Conditions for Running the DTC
^ No Throttle Position (TP) Sensor DTC P0120
^ No Transmission Range (TR) Switch DTC's P0706, P0707, or P0708
^ No Transmission Fluid Temperature (TFT) Sensor DTCs P0711, P0712, or P0713
^ No Speed Sensor DTC's P0717, P0722, P0727
^ No Pressure Control (PC) Solenoid DTCs P0962, P0963, P0966, P0967, P0970, or P0971
^ No Shift Solenoid (SS) Control Circuit DTC's P0973, P0974, P0976, P0977, P0979, P0980,P0982, P0983, P0985, or P0986
^ No Transmission Torque Delivered Circuit DTC P2637
^ No Communications DTC's U0100 or U2104
^ Transmission fluid temperature (TFT) is greater than 60°C
^ Engine speed is greater than 400 RPM
^ Shift range equals D, M, or L
^ Ignition voltage is greater than 10.5 volts

Conditions for Setting the DTC
The TCM commands a gear shift, and one of the following occurs 5 times:
^ Tie-up
^ Engine flare
^ Long shift time
^ Rapid shifting

Action Taken When the DTC Sets
^ DTC P1719 is a Type A DTC
^ The transmission will operate in 5th gear in D range, 2nd in L range
^ Limit engine torque to 150 Nm

Conditions for Clearing the DTC
DTC P1719 is a Type A DTC

Diagnostic Aids
Improper transmission fluid level may cause DTC P0742 to set.
Overloading the vehicle, exceeding the trailer towing limit, or towing in D (drive) may set DTC P1719.

Circuit/System Verification
1. Ignition ON, observe the DTC information with a scan tool.
2. Record Freeze Frame and Failure Records.
3. Clear DTC's.
4. Operate the vehicle under the conditions observed in the Failure Records.
5. Observe the DTC information with the scan tool. Verify that the DTC does not set.

Circuit/System Testing
1. Perform a line pressure test.
2. Remove the Control valve body cover.
3. Inspect the inside of the control valve body cover for excessive sediment. There should not be excessive sediment.
> If excessive sediment is found inspect and replace as necessary the:
^ Forward Clutch
^ Direct Clutch
^ 4-5 Clutch
^ Second Coast Clutch
^ 1-2, Reverse Clutch
^ Low and Reverse Clutch
^ 3rd Gear Band
^ Second Clutch
^ Second Clutch Sprag
^ Low Clutch Sprag
> If all conditions test normal, test or replace the transmission.
4. Inspect the control valve body assembly for the following conditions. The conditions should not be found.
^ Stuck 3-4, 4-5 Shift Solenoid Valve Assembly
^ Stuck Reverse Shift Solenoid
^ Stuck Shift PC Solenoid
^ Stuck TCC Lock Up PC Solenoid
^ Stuck Shift Pressure Control Valve
^ Stuck Shift Pressure Relay Valve
^ Stuck Second Clutch Control Valve
^ Stuck 1-2, Reverse Clutch Control Valve
> If any of the above conditions are found, repair or replace the valve body assembly.
> If all circuits and components test normal, replace the transmission.
5. Verify that the control valve body has been serviced within the past 3 months.
> If the control valve body has not been serviced, test or replace the control valve body assembly.
6. If all circuits and components test normal, replace the transmission.

Repair Instructions
Perform the [Diagnostic Repair Verification - Vehicle Diagnostic Information] after completing the diagnostic procedure.