AUTOMATIC TRANSMISSION SYSTEM (for 2KD-FTV), Diagnostic DTC:P2769, P2770

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

DESCRIPTION

The 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 the operation of the lock-up clutch.

DTC Code DTC Detection Condition Trouble Area
P2769 TCM detects short in shift solenoid valve SL circuit (once) when shift solenoid valve SL is operated (1-trip detection logic)

  • Short in shift solenoid valve SL circuit

  • Shift solenoid valve SL

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

  • Open in shift solenoid valve SL circuit

  • Shift solenoid valve SL

  • TCM

Fail-safe function:

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

MONITOR DESCRIPTION

Torque converter lock-up is controlled by the TCM based on engine rpm, engine load, engine temperature, vehicle speed, transmission temperature, and shift position selection. The TCM determines the lock-up status of the torque converter by comparing the engine rpm (NE) to the input rpm (NC0). The TCM calculates the actual transmission gear by comparing the input rpm (NC0) to the output rpm (SP2). When conditions are appropriate, the TCM requests "lock-up" by applying control voltage to the shift solenoid valve SL. When the shift solenoid valve SL is opened, the shift solenoid valve SL applies pressure to the lock-up relay valve and locks the torque converter assembly. If the TCM detects an open or short in the shift solenoid valve SL circuit, the TCM interprets this as a fault in the shift solenoid valve SL or its circuit. The TCM will illuminate the MIL and store a DTC.

WIRING DIAGRAM

A01DWV5E09

INSPECTION PROCEDURE

PROCEDURE


  1. INSPECT TRANSMISSION WIRE (SHIFT SOLENOID VALVE SL)


    1. A01DZ3UE11
      Text in Illustration
      *a

      Component without harness connected

      (Transmission Wire)

      Disconnect the transmission wire connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      7 (SL) - Body ground 20°C (68°F) 11 to 15 Ω

    NG

    INSPECT SHIFT SOLENOID VALVE SL Click here

    OK

  2. CHECK HARNESS AND CONNECTOR (SHIFT SOLENOID VALVE SL - TCM)


    1. A01E22VE34
      Text in Illustration
      *a

      Rear view of wire harness connector

      (to TCM)

      Disconnect the TCM connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      T19-16 (SL) - Body ground 20°C (68°F) 11 to 15 Ω

    NG

    REPAIR OR REPLACE HARNESS AND CONNECTOR

    OK

    REPLACE TCM

  3. INSPECT SHIFT SOLENOID VALVE SL


    1. A01DYUIE01
      Text in Illustration
      *a

      Component without harness connected

      (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
      Shift solenoid valve SL connector terminal - Shift solenoid valve SL body 20°C (68°F) 11 to 15 Ω

    3. Apply 12 V battery voltage to the shift solenoid valve and check that the valve moves and makes an operating noise.

      OK
      Measurement Condition Specified Condition

      • Battery positive (+) → Shift solenoid valve SL connector

      • Battery negative (-) → Shift solenoid valve SL body

      		 Valve moves and makes an operating noise

    NG

    REPLACE SHIFT SOLENOID VALVE SL

    OK

    REPLACE TRANSMISSION WIRE