GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Saturn 🢒 2002 🢒 VUE - AWD 🢒 Transmission/Transaxle 🢒 Automatic Transaxle - AF33-5 (M45) 🢒 DTC P1719

Circuit Description

The TCM calculates last shift status based on data from the automatic transmission input shaft speed and output shaft speed sensors. The TCM measures the amount of time required to complete each shift.

If the TCM detects incorrect shifting, indicating excessive slip or drag within the transmission, then DTC P1719 sets. DTC P1719 is a type A DTC.

Conditions for Running the DTC
    • No TFT DTCs P0711, P0712 or P0713.
    • No OSS DTC P0722.
    • No engine speed signal DTC P0727.
    • No engine torque signal DTC P1781.
    • The ignition voltage is 8-18 volts.
    • The transmission temperature is 60°C (140°F) or greater.
    • The transmission is in a forward range.

Conditions for Setting the DTC

The TCM commands a gear shift, and one of the following occurs 5 times:

    • Long
    • Short
    • Tie-up
    • Flare

Action Taken When the DTC Sets
    • The TCM requests the ECM to illuminate the malfunction indicator lamp (MIL).
    • The TCM turns the Trans. Protection Mode ON. When the Trans. Protection Mode is ON, the following conditions occur:
       - The transmission will operate in 5th gear when the transmission is shifted into D or I range and 2nd gear when shifted into L range.
       - The line pressure is at maximum.
       - The torque converter clutch (TCC) is disabled.
       - The TCM freezes the transmission adaptive functions.
    • The TCM turns off the line pressure control solenoid valve (SLT).
    • The TCM requests the ECM to limit engine torque to 150 N·m (111 lb ft).
    • The ECM records the operating conditions when the Conditions for Setting the DTC are met. The ECM stores this information as Freeze Frame and Failure Records.
    • The TCM records the operating conditions when the Conditions for Setting the DTC are met. The TCM stores this information as Failure Record.
    • The TCM stores DTC P1719 in TCM history.

Conditions for Clearing the MIL/DTC
    • The ECM turns off the MIL after the third consecutive drive trip in which the TCM does not send a MIL illumination request.
    • A scan tool can clear the DTC.
    • The TCM clears the DTC from TCM history if the vehicle completes 40 warm-up cycles without a non-emission related diagnostic fault occurring.
    • The TCM cancels the DTC default actions when the ignition is OFF long enough in order to power down the TCM.

Diagnostic Aids

Ask the customer about overloading the vehicle, exceeding the trailer towing limit, or towing in DRIVE (D).

Test Description

The numbers below refer to the step numbers on the diagnostic table.

  1. This step tests for low fluid level, which may cause slipping, and result in an incorrect gear ratio.

    2.

  2. This step tests for low line pressure.

Step

Action

Values

Yes

No

1

Did you perform the Diagnostic System Check - Engine Controls?

--

Go to Step 2

Go to Diagnostic System Check - Engine Controls in Engine Controls - 3.0L (L81)

2
  1. Visually inspect the transmission cooling system for fluid leaks.
  2. Repair leaks as necessary.

Refer to Fluid Leak Diagnosis .

Did you find and correct a condition?

--

Go to Step 12

Go to Step 3

3

Inspect for correct transmission fluid level. Refer to Transmission Fluid Check .

Is the action complete?

--

Go to Step 4

--

4
  1. Install a scan tool.
  2. Turn ON the ignition, with the engine OFF.

    3. Important: 

       • Before clearing the DTC, use the scan tool in order to record the ECM and the TCM Failure Records. Using the Clear Eng./Trans. DTC Info function erases the Failure Records from the ECM and TCM.
       • Using the Clear Eng./Trans. DTC Info function erases stored DTCs in both the ECM and TCM.

  3. Record the DTC Failure Records.
  4. Clear the DTC.
  5. Use the scan tool snapshot mode in order to record the Last Shift Status of each gear shift.
  6. Drive the vehicle in DRIVE (D) and record the Last Shift Status of each gear shift.

Does the Last Shift Status of any gear shift indicate Long, Short, Tie-up, or Flare?

--

Go to Step 5

Go to Intermittent Conditions in Engine Controls - 3.0L (L81)

5

Test for correct line pressure. Refer to Line Pressure Check .

Is the action complete?

--

Go to Step 6

--

6
  1. Remove the transmission oil pan. Refer to Transmission Fluid Replacement .
  2. Inspect the bottom of the pan for excessive sediment.

Did you find excessive amounts of sediment?

--

Go to Step 10

Go to Step 7

7

Inspect the control valve body assembly (39) for the following conditions:

    • Stuck 3-4, 4-5 Shift Solenoid Valve Assembly (54).
    • Stuck Reverse Shift Solenoid (S5) green (305)
    • Stuck Shift PC Solenoid (SLS) green (340)
    • Stuck TCC Lock Up PC Solenoid (SLU) black (339)
    • Stuck Shift Pressure Control Valve (430)
    • Stuck Shift Pressure Relay Valve (424)
    • Stuck Second Clutch Control Valve (446)
    • Stuck 1-2, Reverse Clutch Control Valve (411)

Did you find any of the above conditions?

--

Go to Step 9

Go to Step 8

8

Has the control valve body been serviced within the past 3 months or 4,828 km (3,000 mi)?

--

Go to Step 10

Go to Step 9

9

Repair or replace the control valve body assembly. Refer to Control Valve Body Replacement .

Is the action complete?

--

Go to Step 12

--

10

Inspect the following items:

    • Forward Clutch (552)
    • Direct Clutch (556)
    • 4-5 Clutch (577)
    • Second Coast Clutch (228)
    • 1-2, Reverse Clutch (620)
    • Low and Reverse Clutch (516)
    • 3rd Gear Band (16)
    • Second Clutch (217)
    • Second Clutch Sprag (503)
    • Low Clutch Sprag (523)

Did you find any of the above conditions?

--

Go to Step 11

--

11

Repair or replace the transmission. Refer to Transmission Replacement .

Is the action complete?

--

Go to Step 12

--

12
  1. Replace the AT fluid and filter.

    2. Refer to Transmission Fluid Replacement .

  2. Inspect for the correct AT fluid level.
  3. Add new fluid as necessary.

    4. Important: The Clear TAPS function will clear all adapt cells. This may affect transmission performance. The TCM will update the adapt cell values as the vehicle is driven.

  4. Use the scan tool in order to perform the following:
    5. • Reset oil life monitor to 100 percent
    • Clear TAPS

Did you complete the above procedures?

--

Go to Step 13

--

13

Perform the following procedure in order to verify the repair:

  1. Select DTC.
  2. Select Clear Info.
  3. Operate the vehicle in DRIVE (D) in order to obtain a Good Last Shift Status for each gear shift.
  4. Select Specific DTC.
  5. Enter DTC P1719.

Does the DTC reset?

--

Go to Step 2

Go to Step 14

14

With the scan tool, observe the stored information, capture info and DTC info.

Does the scan tool display any DTCs that you have not diagnosed?

--

Go to Diagnostic Trouble Code (DTC) List in Engine Controls - 3.0L (L81)

System OK