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 ECM to control the hydraulic pressure acting on the lock-up relay valve, which then controls operation of the lock-up clutch.

DTC No. DTC Detection Condition Trouble Area
P2769 ECM 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

  • Wiring Harness Connector

  • ECM
P2770 ECM 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

  • Wiring Harness Connector

  • ECM

Fail-safe function:

If the ECM 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 ECM sends a signal to shift solenoid valve SL to regulate the hydraulic pressure and provide smoother torque converter clutch engagement. 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 valve SL, it will illuminate the MIL.

MONITOR STRATEGY

Related DTCs

P2769: Shift solenoid valve SL/Range check (Low resistance)

P2770: Shift solenoid valve SL/Range check (High resistance)
Required sensors/Components Shift solenoid valve SL
Frequency of operation Continuous
Duration 1 time
MIL operation 2 driving cycles
Sequence of operation None

TYPICAL ENABLING CONDITIONS

P2769: Range check (Low resistance):
The monitor will run whenever the following DTCs are not present None
Command to solenoid ON
Time after command to solenoid OFF to ON More than 0.008 sec.
P2770: Range check (High resistance):
The monitor will run whenever the following DTCs are not present None
Command to solenoid OFF
Time after command to solenoid ON to OFF More than 0.008 sec.

TYPICAL MALFUNCTION THRESHOLDS

P2769: Range check (Low resistance):
Intelligent power MOS diagnosis fail signals detected while the solenoid is operated Fail at solenoid resistance: 8 Ω or less
P2770: Range check (High resistance):
Intelligent power MOS diagnosis fail signals detected while the solenoid is not operated Fail at solenoid resistance: 100 kΩ or more

COMPONENT OPERATING RANGE

Shift solenoid valve SL Resistance: 11 to 15 Ω at 20°C (68°F)

WIRING DIAGRAM

A01HZEIE01

INSPECTION PROCEDURE

Note

Perform the universal trip to clear permanent DTCs Click here.

PROCEDURE


  1. CHECK HARNESS AND CONNECTOR (SHIFT SOLENOID VALVE SL CIRCUIT)


    1. A01I0O3E03
      Text in Illustration
      *a

      Front view of wire harness connector

      (to ECM)

      Disconnect the ECM connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      E26-3 (SL) - Body ground 20°C (68°F) 11 to 15 Ω
      Result
      Result Proceed to
      OK A
      NG B

    B

    CHECK HARNESS AND CONNECTOR (ECM - WIRING HARNESS CONNECTOR) Click here

    A

    REPLACE ECM Click here

  2. CHECK HARNESS AND CONNECTOR (ECM - WIRING HARNESS CONNECTOR)


    1. Disconnect the connector from the wiring harness connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      E26-3 (SL) - E8-6 (SL) Always Below 1 Ω
      E26-3 (SL) - Body ground and other terminals Always 10 kΩ or higher
      E8-6 (SL) - Body ground and other terminals Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  3. INSPECT TRANSMISSION WIRE (SHIFT SOLENOID VALVE SL)


    1. A01I1QKE35
      Text in Illustration
      *a

      Component without harness connected

      (Transmission Wire)

      Remove the wiring harness connector from the transaxle.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      A-6 (SL) - Body ground 20°C (68°F) 11 to 15 Ω
      Result
      Result Proceed to
      OK (When not using the engine support bridge) A
      OK (When using the engine support bridge) B
      NG C

    B

    REPLACE WIRING HARNESS CONNECTOR Click here

    C

    INSPECT SHIFT SOLENOID VALVE SL Click here

    A

    REPLACE WIRING HARNESS CONNECTOR Click here

  4. INSPECT SHIFT SOLENOID VALVE SL


    1. A01HXWKE02
      Text in Illustration
      *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
      Result Proceed to
      OK A
      NG (When not using the engine support bridge) B
      NG (When using the engine support bridge) C

    B

    REPLACE SHIFT SOLENOID VALVE SL Click here

    C

    REPLACE SHIFT SOLENOID VALVE SL Click here

    A

    REPLACE TRANSMISSION WIRE Click here