GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Chevrolet 🢒 2008 🢒 Equinox 🢒 Power and Signal Distribution 🢒 Wiring Systems and Power Management 🢒 DTC P1719

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

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 DTCs P0706, P0707, or P0708
    • No Transmission Fluid Temperature (TFT) Sensor DTCs P0711, P0712, or P0713
    • No Speed Sensor DTCs P0717, P0722, P0727
    • No Pressure Control (PC) Solenoid DTCs P0962, P0963, P0966, P0967, P0970, or P0971
    • No Shift Solenoid (SS) Control Circuit DTCs P0973, P0974, P0976, P0977, P0979, P0980, P0982, P0983, P0985, or P0986
    • No Transmission Torque Delivered Circuit DTC P2637
    • No Communications DTCs 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 or M range, 2nd in L range
    • Limit engine torque to 150 N·m

Conditions for Clearing the DTC

DTC P1719 is a Type A DTC

Diagnostic Aids

Improper transmission fluid level may cause DTC P0742 to set. Refer to the Transmission Fluid Check procedure

Overloading the vehicle, exceeding the trailer towing limit, or towing in D (drive) may set DTC P1719.

Reference Information

Schematic Reference

Automatic Transmission Controls Schematics

Connector End View Reference

    •  Electrical Center Identification Views
    •  Component Connector End Views
    •  Splice Pack Connector End Views
    •  Inline Harness Connector End Views

Electrical Information Reference

    •  Circuit Testing
    •  Connector Repairs
    •  Testing for Intermittent Conditions and Poor Connections
    •  Wiring Repairs

DTC Type Reference

    •  Diagnostic Trouble Code (DTC) Type Definitions
    •  Diagnostic Trouble Code (DTC) List/Type

Scan Tool Reference

Control Module References for scan information.

Circuit/System Verification
  1. Ignition ON, observe the DTC information with a scan tool.
  2. Record Freeze Frame and Failure Records.
  3. Clear DTCs.
  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. Refer to Line Pressure Check procedure.
  2. Remove the Control valve body cover. Refer to Control Valve Body Cover Removal procedure.
  3. Inspect the inside of the control valve body cover for excessive sediment. There should not be excessive sediment.
    4. ⇒If excessive sediment is found inspect and replace as necessary the:
    • Forward Clutch
    • Direct Cultch
    • 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
    • Refer to Forward and Direct Clutch Assembly Removal , 4-5 Clutch Drum Assembly Assemble and 2nd Clutch Assemble procedures.
    ⇒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.
    5. • 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
    • Refer to Control Valve Rear Body Disassemble .
         ⇒If any of the above conditions are found, repair or replace the valve body assembly. Refer to Control Valve Body Replacement procedure.
         ⇒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.
    6. ⇒If the control valve body has not been serviced, test or replace the control valve body assembly. Refer to Control Valve Body Replacement procedure.
  6. If all circuits and components test normal, replace the transmission.

Repair Instructions

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.