AUTOMATIC TRANSAXLE SYSTEM, Diagnostic DTC:P2769, P2770

DTC Code DTC Name
P2769 Torque Converter Clutch Solenoid Circuit Low (Shift Solenoid Valve DSL)
P2770 Torque Converter Clutch Solenoid Circuit High (Shift Solenoid Valve DSL)

DESCRIPTION

The shift solenoid valve DSL 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 controls operation of the lock-up clutch.

DTC No. DTC Detection Condition Trouble Area
P2769 ECM detects short in solenoid valve DSL circuit (0.1 sec.) when solenoid valve DSL is operated (2-trip detection logic)

  • Short in shift solenoid valve DSL circuit

  • Shift solenoid valve DSL

  • ECM
P2770 ECM detects open in solenoid valve DSL circuit (0.1 sec.) when solenoid valve DSL is not operated (2-trip detection logic)

  • Open in shift solenoid valve DSL circuit

  • Shift solenoid valve DSL

  • ECM

MONITOR DESCRIPTION

Torque converter lock-up is controlled by the ECM based on engine rpm, engine load, engine temperature, vehicle speed, transmission temperature, and shift range selection. The ECM determines the lock-up status of the torque converter by comparing the engine rpm (NE) to the input turbine rpm (NT). The ECM calculates the actual transmission gear by comparing input turbine rpm (NT) to counter gear rpm (NC). When conditions are appropriate, the ECM requests "lock-up" by applying control voltage to the shift solenoid DSL. When the DSL is opened, it applies pressure to the lock-up relay valve and locks the torque converter clutch. If the ECM detects an open or short in the DSL solenoid circuit, the ECM interprets this as a fault in the DSL solenoid or circuit. The ECM will turn on the MIL and store the DTC.

WIRING DIAGRAM

A017E6WE95

INSPECTION PROCEDURE

PROCEDURE


  1. INSPECT TRANSMISSION WIRE (DSL)


    1. A017EZRE57

      Disconnect the transmission wire connector from the transaxle.

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

      Standard resistance
      Tester Connection Condition Specified Condition
      10 (DSL) - Body ground 20°C (68°F) 11 to 13 Ω

    NG

    INSPECT SHIFT SOLENOID VALVE (DSL) Click here

    OK

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


    1. A017CYDE20

      Connect the transmission wire connector.

    2. Disconnect the ECM connector.

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

      Standard resistance
      Tester Connection Condition Specified Condition
      B2-11 (DSL) - Body ground 20°C (68°F) 11 to 13 Ω

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

    REPLACE ECM (for 2GR-FE) Click here

  3. INSPECT SHIFT SOLENOID VALVE (DSL)


    1. A017E6UE12

      Remove the shift solenoid valve DSL.

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

      Standard resistance
      Tester Connection Condition Specified Condition
      Solenoid Connector (DSL) - Solenoid Body (DSL) 20°C (68°F) 11 to 13 Ω

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

      OK
      The solenoid valve makes an operating sound.

    NG

    REPLACE SHIFT SOLENOID VALVE (DSL) Click here

    OK

    REPAIR OR REPLACE TRANSMISSION WIRE Click here