ELECTRONIC CONTROLLED AUTOMATIC TRANSMISSION SYSTEM, Diagnostic DTC:P2769, P2770

DTC Code DTC Name
P2769 Short in Torque Converter Clutch Solenoid Circuit (Shift Solenoid Valve SL)
P2770 Open in Torque Converter Clutch Solenoid Circuit (Shift Solenoid Valve SL)

DESCRIPTION

The shift solenoid valve SL is turned "ON" and "OFF" by signals from the ECM in order to control the hydraulic pressure operation, the lock-up relay valve, which then the controls operation of the lock-up clutch.

DTC No. DTC Detection Condition Trouble Area
P2769 ECM detects short in solenoid valve SL circuit 1 time when solenoid valve SL is operated (1-trip detection logic)

  • Short in shift solenoid valve SL circuit

  • Shift solenoid valve SL

  • ECM
P2770 ECM detects open in solenoid valve SL circuit 1 time when solenoid valve SL is not operated (1-trip detection logic)

  • Open in shift solenoid valve SL circuit

  • Shift solenoid valve SL

  • ECM

MONITOR DESCRIPTION

Based on the signals from the Throttle Position Sensor, the Airflow Meter and the Crankshaft Position Sensor, the ECM sends a signal to the SL Solenoid Valve to regulate the hydraulic pressure and provide smoother gearshifts. The shift-solenoid valve SL responds to commands from the ECM. The valve controls the lock-up relay valve to perform the torque-converter lock-up function. If the ECM detects an open or short circuit for shift-solenoid SL, it will illuminate the MIL.

WIRING DIAGRAM

A01BCD2E15

INSPECTION PROCEDURE

PROCEDURE


  1. INSPECT TRANSMISSION WIRE (SL)


    1. A01BB7WE04

      Disconnect the transmission wire connector from the transmission.

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

      Resistance
      Tester Connection

      Specified Condition

      20°C (68°F)
      7 - Body ground 11 to 15 Ω

    NG

    INSPECT SHIFT SOLENOID VALVE SL Click here

    OK

  2. CHECK HARNESS AND CONNECTOR (TRANSMISSION WIRE - ECM)


    1. A01BF9KE18

      Connect the transmission connector to the transmission.

    2. Disconnect the connector from the ECM.

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

      Resistance
      Tester Connection

      Specified Condition

      20°C (68°F)
      D3-11 (SL) - Body ground 11 to 15 Ω

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

    REPLACE ECM

  3. INSPECT SHIFT SOLENOID VALVE SL


    1. A01BAT7E02

      Remove the shift solenoid valve SL.

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

      Resistance
      Tester Connection

      Specified Condition

      20°C (68°F)
      Solenoid Connector (SR) - Solenoid Body (SR) 11 to 15 Ω

    3. Connect the positive (+) lead to the terminal of the solenoid connector, and the negative (-) lead to the solenoid body.

      OK
      The solenoid makes an operating sound.

    NG

    REPLACE SHIFT SOLENOID VALVE SL

    OK

    REPAIR OR REPLACE TRANSMISSION WIRE