Last Modified: 08-21-2023 6.11:8.1.0 Doc ID: RM100000001ARNN
Model Year Start: 2019 Model: Avalon Prod Date Range: [04/2018 -           ]
Title: UA80E (AUTOMATIC TRANSMISSION / TRANSAXLE): AUTOMATIC TRANSAXLE SYSTEM: P271312; Pressure Control Solenoid "D" Circuit Short to Battery; 2019 - 2022 MY Avalon [04/2018 -        ]

DTC

P271312

Pressure Control Solenoid "D" Circuit Short to Battery

DESCRIPTION

Refer to DTC P27137F.

Click here 2019 MY Avalon [04/2018 - 08/2019]; UA80E (AUTOMATIC TRANSMISSION / TRANSAXLE): AUTOMATIC TRANSAXLE SYSTEM: P27137F; Pressure Control Solenoid "D" Actuator Stuck Off 2020 - 2022 MY Avalon [08/2019 -        ]; 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

While the engine is running, a short to +B is detected in the solenoid (SLT) valve circuit for 1 second (1-trip detection logic).
  • Solenoid (SLT) valve
  • Transmission wire
  • Harness and connector
  • ECM

Comes on

DTC stored

SAE Code:

P2721

MONITOR DESCRIPTION

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

MONITOR STRATEGY

Related DTC

P2721: Solenoid (SLT) valve/Range check (High current)

P2721: Solenoid (SLT) valve/Range check (High voltage)

Required sensors/components

Solenoid (SLT) valve

Frequency of operation

Continuous

Duration

High current: 1 sec.

High voltage: 1.3 sec.

MIL operation

Immediate

Sequence of operation

None

TYPICAL ENABLING CONDITIONS

All

The monitor will run whenever the following DTCs are not stored

None

Solenoid current cut status

Not cut

Engine switch

On (IG)

Starter

OFF

Battery voltage

10.5 V or more

High current (A)

Battery voltage

8 V or more and less than 12.499 V

Target current (0.1 sec. or more)

0.8 A or less

High current (B)

Battery voltage

12.5 V or more and less than 16 V

Target current (0 sec. or more)

1 A or less

High voltage

Target current

0.2 A or more

Output duty cycle

10% or more and 90% or less

TYPICAL MALFUNCTION THRESHOLDS

High current:

  • Any of the following conditions are met: High current (A) or (B)

    High current (A)

    Battery voltage

    8 V or more and less than 12.499 V

    Solenoid current

    More than 0.92 A

    High current (B)

    Battery voltage

    12.5 V or more and less than 16 V

    Solenoid current

    More than 1.1 A

High voltage

Solenoid voltage monitor

No signal

COMPONENT OPERATING RANGE

High current

Both of the following conditions are met

(a) or (b)

(a) Battery voltage

8 V or more and less than 12.499 V

Solenoid current

0.92 A or less

(b) Battery voltage

12.5 V or more and less than 16 V

Solenoid 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 2019 - 2022 MY Avalon [04/2018 -        ]; UA80E (AUTOMATIC TRANSMISSION / TRANSAXLE): AUTOMATIC TRANSAXLE SYSTEM: DTC CHECK / CLEAR

  1. Connect the Techstream to the DLC3.
  2. Turn the engine switch on (IG) and turn the Techstream on.
  3. Clear the DTCs (even if no DTCs are stored, perform the clear DTC procedure).
  4. Turn the engine switch off and wait for 2 minutes or more.
  5. Turn the engine switch on (IG) 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.
  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 2019 - 2022 MY Avalon [04/2018 -        ]; 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 2019 - 2021 MY Avalon [04/2018 - 08/2021]; UA80E (AUTOMATIC TRANSMISSION / TRANSAXLE): AUTOMATIC TRANSAXLE SYSTEM: PRECAUTION 2022 MY Avalon [08/2021 -        ]; UA80E (AUTOMATIC TRANSMISSION / TRANSAXLE): AUTOMATIC TRANSAXLE SYSTEM: PRECAUTION

PROCEDURE

1.

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

(a) Disconnect the C56 ECM connector.

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

C56-67 (SLT+) or C56-37 (SLT-) - Other terminals

Always

10 kΩ or higher
NG

GO TO STEP 3

OK

2.

REPLACE ECM

(a) Replace the ECM.

Click here 2019 - 2022 MY Avalon [04/2018 -        ]; 2GR-FKS (ENGINE CONTROL): ECM: COMPONENTS

NEXT

PERFORM REGISTRATION

3.

CHECK HARNESS AND CONNECTOR (TRANSMISSION WIRE - ECM)

(a) Disconnect the C52 transmission wire connector.

(b) Disconnect the C56 ECM connector.

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

C52-24 (SLT+) or C56-67 (SLT+) - Other terminals

Always

10 kΩ or higher

C52-23 (SLT-) or C56-37 (SLT-) - Other terminals

Always

10 kΩ or higher
NG

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

4.

INSPECT SOLENOID (SLT) VALVE

(a) Remove the solenoid (SLT) valve.

Click here 2019 - 2022 MY Avalon [04/2018 -        ]; UA80E (AUTOMATIC TRANSMISSION / TRANSAXLE): VALVE BODY ASSEMBLY: DISASSEMBLY

*a

Component without harness connected

(Solenoid (SLT) Valve)

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

Solenoid (SLT) valve connector terminal 1 - terminal 2

20°C (68°F)

5.0 to 5.6 Ω

(c) Connect a positive (+) lead from the battery with a 21 W bulb to terminal 1 and a negative (-) lead 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 SOLENOID (SLT) VALVE