AUTOMATIC TRANSMISSION SYSTEM, Diagnostic DTC:P2719, P2720, P2721

DTC Code DTC Name
P2719 Pressure Control Solenoid "D" Circuit Performance (SLT Solenoid)
P2720 Pressure Control Solenoid "D" Control Circuit Low
P2721 Pressure Control Solenoid "D" Control Circuit High

DESCRIPTION

The shift solenoid valve SLT is controlled by the duty ratio as determined in advance by the transmission control computer, based upon signals from the accelerator position sensor, input speed sensor NT and output speed sensor SP2. In this way, the line pressure is adjusted to match the throttle valve opening angle and engine output. The TCM uses the revolution signals from the input speed sensor NT and output speed sensor SP2 to detect clutch and other slipping.

DTC No.

DTC Detection Condition


  1. Diagnosis Condition

  2. Malfunction Status

  3. Malfunction Time

  4. Other

 Trouble Area
P2719

  1. Not learning control prohibited status

  2. The difference between the shift solenoid valve SLT operational specified current and operational feedback current is 12 A or more in total.

  3. Detects "2.Malfunction Status" 2 times consecutively.

  4. 1-trip detection logic

  • Shift solenoid valve SLT

  • Transmission wire

  • Harness and connector

  • TCM
P2720

  1. Not learning control prohibited status

  2. 1 second or more has elapsed after turning shift solenoid valve SLT off.

    The shift solenoid valve SLT operational feedback voltage is 0.018 V or less.

  3. Detects malfunction that continues for 100 ms or more 5 times consecutively.

  4. 1-trip detection logic

  • Shift solenoid valve SLT

  • Transmission wire

  • Harness and connector

  • TCM
P2721

  1. Not learning control prohibited status

  2. 1 second or more has elapsed after turning shift solenoid valve SLT on.

    The shift solenoid valve SLT operational feedback voltage is 0.257 V or more.

  3. Detects malfunction that continues for 100 ms or more 5 times consecutively.

  4. 1-trip detection logic

  • Shift solenoid valve SLT

  • Transmission wire

  • Harness and connector

  • TCM

MONITOR DESCRIPTION

When an open or short in the shift solenoid valve SLT circuit or feedback stuck is detected, the TCM interprets this as a fault. The TCM will turn on the MIL and store the DTC.

WIRING DIAGRAM

A004KRXE20
*a Shift Solenoid Valve SLT
*b Transmission Wire

CAUTION / NOTICE / HINT

Note

Perform the universal trip to clear permanent DTCs Click here.

PROCEDURE


  1. CHECK HARNESS AND CONNECTOR


    1. Disconnect the A18 TCM connector.

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

      Standard resistance
      Tester Connection Condition Specified Condition
      A18-4(SLT+) - A18-9(SLT-) 20°C(68°F) 5.0 to 5.6 Ω

    3. Disconnect the A18 TCM connector.


    NG

    CHECK HARNESS AND CONNECTOR (TRANSMISSION WIRE - TCM) Click here

    OK

  2. REPLACE TCM


    1. Replace the TCM Click here.


    NEXT

    PERFORM THE RESET MEMORY Click here

  3. CHECK HARNESS AND CONNECTOR (TRANSMISSION WIRE - TCM)


    1. Disconnect the A18 TCM connector.

    2. Disconnect the L4 transmission wire connector.

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

      Standard resistance
      Tester Connection Condition Specified Condition
      A18-4(SLT+) - L4-11(SLT+) Always Below 1 Ω
      A18-9(SLT-) - L4-4(SLT-) Always Below 1 Ω

    4. Measure the voltage according to the value(s) in the table below.

      Standard voltage
      Tester Connection Condition Specified Condition
      A18-4(SLT+) - Body ground Ignition switch ON Below 1 V
      A18-9(SLT-) - Body ground Ignition switch ON Below 1 V

    5. Connect the A18 TCM connector.

    6. Connect the L4 transmission wire connector.


    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  4. INSPECT SHIFT SOLENOID VALVE SLT


    1. Remove the shift solenoid valve SLT Click here.

    2. Perform inspection of the shift solenoid valve SLT Click here.


    OK

    REPAIR OR REPLACE TRANSMISSION WIRE Click here

    NG

    REPLACE SHIFT SOLENOID VALVE SLT Click here