Last Modified: 04-05-2023 6.11:8.1.0 Doc ID: RM100000000YIZB
Model Year Start: 2017 Model: Sienna Prod Date Range: [08/2016 - 11/2017]
Title: UA80E (AUTOMATIC TRANSMISSION / TRANSAXLE): AUTOMATIC TRANSAXLE SYSTEM: P271312,P271314; Pressure Control Solenoid "D" Circuit Short to Battery; 2017 MY Sienna [08/2016 - 11/2017]

DTC

P271312

Pressure Control Solenoid "D" Circuit Short to Battery

DTC

P271314

Pressure Control Solenoid "D" Circuit Short to Ground or Open

DESCRIPTION

Refer to DTC P27137F.

Click here 2017 MY Sienna [08/2016 - 11/2017]; UA80E (AUTOMATIC TRANSMISSION / TRANSAXLE): AUTOMATIC TRANSAXLE SYSTEM: P27137F; Pressure Control Solenoid "D" Actuator Stuck Off+

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

MIL

Memory

Note

P271312

Pressure Control Solenoid "D" Circuit Short to Battery

1. Diagnosis Condition 2.Malfunction Status 3. Malfunction Time 4. Other

  1. Engine is running
  2. Shift solenoid valve SLT circuit is short to +B
  3. 1 second
  4. 1-trip detection logic
  • Shift solenoid valve SLT
  • Transmission wire
  • Harness and connector
  • ECM

Comes on

DTC stored

SAE Code:

P2721

P271314

Pressure Control Solenoid "D" Circuit Short to Ground or Open

1. Diagnosis Condition 2.Malfunction Status 3. Malfunction Time 4. Other

  1. Engine is running
  2. Shift solenoid valve SLT circuit is open or shorted
  3. 1 second
  4. 1-trip detection logic
  • Shift solenoid valve SLT
  • Transmission wire
  • Harness and connector
  • ECM

Comes on

DTC stored

SAE Code:

P2720

MONITOR DESCRIPTION

When an open or short to +B and ground in the shift solenoid valve SLT circuit is detected, the ECM will determine that there is a malfunction, illuminate the MIL and store this DTC.

MONITOR STRATEGY

Related DTC

P2720: Shift solenoid valve SLT/Range check (Low current)

P2721: Shift solenoid valve SLT/Range check (High current)

P2721: Shift solenoid valve SLT/Range check (High voltage)

Required sensors/Components

Shift solenoid valve SLT

Frequency of operation

Continuous

Duration

P2720: 1 sec.

P2721: 1 sec. (High current), 1.3 sec. (High voltage)

MIL operation

Immediate

Sequence of operation

None

TYPICAL ENABLING CONDITIONS

All

Solenoid current cut status

Not cut

Battery voltage

8 V or more

Ignition Switch

ON

Starter

OFF

P2720

The monitor will run whenever the following DTCs are not present

None

Battery voltage

10.5 V or more

Target current

0.2 A or more

P2721

The monitor will run whenever the following DTCs are not present

None

Battery voltage

10.5 V or more

High current Condition

Following condition is met

Condition a. or b.

a. Battery voltage

8 V or more and less than 12.499 V

Target current

0.8 A or less

b. Battery voltage

12.5 V or more and less than 16 V

Target current

1 A or less

High voltage Condition

Battery voltage

10.5 V or more

Target current

0.2 A or more

Output duty cycle

10% or more and 90% or less

TYPICAL MALFUNCTION THRESHOLDS

P2720

  • Solenoid current

    Less than 0.075 A

    Solenoid high current cutout by solenoid driver IC

    ON

P2721

  • High current

    Solenoid current

    a. or b.

    a. Battery voltage

    8 V or more and less than 12.499 V

    Target current

    More than 0.92 A

    b. Battery voltage

    12.5 V or more and less than 16 V

    Target current

    More than 1.1 A

    High voltage

    Solenoid voltage monitor

    No signal

COMPONENT OPERATING RANGE

P2720

  • Solenoid current

    0.075 A or more

    Solenoid high current cutout by solenoid driver IC

    OFF

P2721

  • High current

    Solenoid current

    a. or b.

    a. Battery voltage

    8 V or more and less than 12.499 V

    Target current

    0.92 A or less

    b. Battery voltage

    12.5 V or more and less than 16 V

    Target current

    1.1 A or less

    High voltage

    Solenoid voltage monitor

    Signal input

CONFIRMATION DRIVING PATTERN

HINT:

  • After repairs have been completed, clear the DTCs and then check that the vehicle has returned to normal by performing the following All Readiness check procedure.
  • When clearing the permanent DTCs, refer to the Clear Permanent DTC procedure.

    Click here 2017 - 2020 MY Sienna [08/2016 -        ]; UA80E (AUTOMATIC TRANSMISSION / TRANSAXLE): AUTOMATIC TRANSAXLE SYSTEM: DTC CHECK / CLEAR

  1. Connect the Techstream to the DLC3.
  2. Turn the ignition switch to ON and turn the Techstream on.
  3. Clear the DTCs (even if no DTCs are stored, perform the clear DTC procedure).
  4. Turn the ignition switch off and wait for 2 minutes or more.
  5. Turn the ignition switch to ON and turn the Techstream on.
  6. Start the engine.
  7. Wait for 2 seconds or more with the engine running. [*1]

    HINT:

    [*1] : Normal judgment procedure.

    The normal judgment procedure is used to complete DTC judgment and also used when clearing permanent DTCs.

  8. Enter the following menus: Powertrain / Transmission / Utility / All Readiness.
  9. Input the DTC: P271312 or P271314.
  10. Check the DTC judgment result.

    Techstream Display

    Description

    NORMAL
    • DTC judgment completed
    • System normal

    ABNORMAL
    • DTC judgment completed
    • System abnormal

    INCOMPLETE
    • DTC judgment not completed
    • Perform driving pattern after confirming DTC enabling conditions

    N/A
    • Unable to perform DTC judgment
    • Number of DTCs which do not fulfill DTC preconditions has reached ECU memory limit

    HINT:

    • If the judgment result shows NORMAL, the system is normal.
    • If the judgment result shows ABNORMAL, the system has a malfunction.
    • If the judgment result shows INCOMPLETE or N/A, perform the normal judgment procedure again.

WIRING DIAGRAM

CAUTION / NOTICE / HINT

NOTICE:

  • Perform the universal trip to clear permanent DTCs.

    Click here 2017 - 2020 MY Sienna [08/2016 -        ]; UA80E (AUTOMATIC TRANSMISSION / TRANSAXLE): AUTOMATIC TRANSAXLE SYSTEM: DTC CHECK / CLEAR

  • Perform registration and/or initialization when parts related to the automatic transaxle are replaced.

    Click here 2017 - 2020 MY Sienna [08/2016 -        ]; UA80E (AUTOMATIC TRANSMISSION / TRANSAXLE): AUTOMATIC TRANSAXLE SYSTEM: PRECAUTION

PROCEDURE

1.

CHECK HARNESS AND CONNECTOR (TRANSMISSION WIRE (SHIFT SOLENOID VALVE SLT) - ECM)

(a) Disconnect the B67 ECM connector.

(b) Measure the resistance according to the value(s) in the table below.

Standard Resistance:

Tester Connection

Condition

Specified Condition

B67-67 (SLT+) - B67-37 (SLT-)

20°C (68°F)

5.0 to 5.6 Ω

B67-67 (SLT+) or B67-37 (SLT-) - Body ground and other terminals

Always

10 kΩ or higher
NG

GO TO STEP 3

OK

2.

REPLACE ECM

(a) Replace the ECM.

Click here 2017 - 2020 MY Sienna [08/2016 -        ]; 2GR-FKS (ENGINE CONTROL): ACCELERATOR PEDAL: COMPONENTS

NEXT

PERFORM A/T CODE REGISTRATION

3.

CHECK HARNESS AND CONNECTOR (TRANSMISSION WIRE - ECM)

(a) Disconnect the B65 transmission wire connector.

(b) Disconnect the B67 ECM connector.

(c) Measure the resistance according to the value(s) in the table below.

Standard Resistance:

Tester Connection

Condition

Specified Condition

B65-24 (SLT+) - B67-67 (SLT+)

Always

Below 1 Ω

B65-23 (SLT-) - B67-37 (SLT-)

Always

Below 1 Ω

B65-24 (SLT+) or B67-67 (SLT+) - Body ground and other terminals

Always

10 kΩ or higher

B65-23 (SLT-) or B67-37 (SLT-) - Body ground and other terminals

Always

10 kΩ or higher
NG

REPAIR OR REPLACE HARNESS OR CONNECTOR (TRANSMISSION WIRE - ECM)
OK

4.

INSPECT SHIFT SOLENOID VALVE SLT

(a) Remove the shift solenoid valve SLT.

Click here 2017 - 2020 MY Sienna [08/2016 -        ]; UA80E (AUTOMATIC TRANSMISSION / TRANSAXLE): VALVE BODY ASSEMBLY: DISASSEMBLY

*a

Component without harness connected

(Shift Solenoid Valve SLT)

(b) Measure the resistance according to the value(s) in the table below.

Standard Resistance:

Tester Connection

Condition

Specified Condition

Shift solenoid valve SLT connector terminal 1 - terminal 2

20°C (68°F)

5.0 to 5.6 Ω

(c) Connect a positive (+) lead from the battery to terminal 1 and a negative (-) lead with a 21 W bulb to terminal 2 of the solenoid valve connector. Check that the valve moves and makes an operating sound.

OK:

Valve moves and makes an operating sound.

OK

REPAIR OR REPLACE TRANSMISSION WIRE

NG

REPLACE SHIFT SOLENOID VALVE SLT