AUTOMATIC TRANSAXLE 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

Shift solenoid valve SL is turned on and off by signals from the TCM to control the hydraulic pressure acting on the lock-up relay valve, which then controls operation of the lock-up clutch.

DTC No. Detection Item DTC Detection Condition Trouble Area MIL Memory
P2769 Short in Torque Converter Clutch Solenoid Circuit (Shift Solenoid Valve SL) TCM detects a short in the shift solenoid valve SL circuit when the shift solenoid valve SL is operated (2 trip detection logic).

  • Short in shift solenoid valve SL circuit

  • Shift solenoid valve SL

  • TCM

 Comes on DTC stored
P2770 Open in Torque Converter Clutch Solenoid Circuit (Shift Solenoid Valve SL) TCM detects an open in the shift solenoid valve SL circuit when the shift solenoid valve SL is not operated (2 trip detection logic).

  • Open in shift solenoid valve SL circuit

  • Shift solenoid valve SL

  • TCM

 Comes on DTC stored

Fail-safe function:

If the TCM detects a malfunction, it turns shift solenoid valve SL off.

MONITOR DESCRIPTION

Based on the signals from the throttle position sensor, the air flow meter and the crankshaft position sensor, the TCM sends a signal to the shift solenoid valve SL to regulate the hydraulic pressure and provide smoother torque converter clutch engagement. The shift solenoid valve SL responds to commands from the TCM. The valve controls the lock-up relay valve to perform the torque-converter lock-up function. If the TCM detects an open or short in the shift solenoid valve SL circuit, it will illuminate the MIL and store a DTC.

WIRING DIAGRAM

A018L8JE06
*1 Shift Solenoid Valve SL
*2 Transaxle Assembly

PROCEDURE


  1. INSPECT TRANSMISSION WIRE (SHIFT SOLENOID VALVE SL)


    1. A018JBZC17
      *a

      Component without harness connected

      (Transmission Wire)

      Remove the TCM from the transaxle.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      6 (SL) - Body ground 20°C (68°F) 11 to 15 Ω
      Result
      Proceed to
      OK
      NG

    OK

    REPLACE TCM Click here

    NG

  2. INSPECT SHIFT SOLENOID VALVE SL


    1. A002C90C03
      *1 Shift Solenoid Valve SL

      Remove shift solenoid valve SL.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      Solenoid Connector (SL) - Solenoid Body (SL) 20°C (68°F) 11 to 15 Ω
      Result
      Proceed to
      OK
      NG

    OK

    REPLACE TRANSMISSION WIRE Click here

    NG

    REPLACE SHIFT SOLENOID VALVE SL Click here