AUTOMATIC TRANSAXLE SYSTEM, Diagnostic DTC:P077513

DTC Code DTC Name
P077513 Pressure Control Solenoid "B" Circuit Open

DESCRIPTION

Changing from 1st to 6th gear is performed by the ECM turning solenoid (SL1, SL2, SL3, SL4 and SL) valves on and off. If an open or short occurs in any of the solenoid valve circuits, the ECM controls the remaining normal solenoid valves to allow the vehicle to be driven.

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DTC No. Detection Item DTC Detection Condition Trouble Area MIL Memory Note
P077513 Pressure Control Solenoid "B" Circuit Open

1. Diagnosis Condition 2. Malfunction Status 3. Malfunction Time 4. Other


  1. Driving so that gear changes occur

  2. An open or short in the solenoid (SL2) valve circuit is detected.

  3. 1 second

  4. 1-trip detection logic

  • Open or short in solenoid (SL2) valve circuit

  • Wiring harness connector

  • Transmission wire

  • Solenoid (SL2) valve

  • ECM

 Comes on DTC stored

SAE Code:

P0778

MONITOR DESCRIPTION

This DTC indicates an open or short in the solenoid (SL2) valve circuit. The ECM commands gear shifts by turning the solenoid valves on or off. When there is an open or short in any of the solenoid valve circuits, the ECM detects the problem, illuminates the MIL and stores a DTC. The ECM also performs the fail-safe function and turns the other normal solenoid valves on or off. (In the case of an open or short, the ECM stops sending current to the circuit.)

While driving and shifting gears, if the ECM detects an open or short in the solenoid (SL2) valve circuit, the ECM determines there is a malfunction.

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WIRING DIAGRAM

A01VXOGE38

CAUTION / NOTICE / HINT

Note

Perform registration and/or initialization when parts related to the automatic transaxle are replaced.

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Tech Tips


  • The following table shows normal operation of the solenoid (SL2) valve when the shift lever is in D:

    ECM commanded gear 1st 2nd 3rd 4th 5th 6th
    Solenoid (SL2) valve OFF OFF OFF ON ON ON

  • After performing repair, clear the DTCs and perform the following procedure to check that DTCs are not output.


    1. Perform the D Position Shift Test inspection in Road Test.

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    2. Check for DTCs again.

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PROCEDURE


  1. CHECK HARNESS AND CONNECTOR (SOLENOID (SL2) VALVE CIRCUIT)


    1. Disconnect the D1 ECM connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      D1-5 (SL2+) - D1-4 (SL2-) 20°C (68°F) 5.0 to 5.6 Ω
      D1-5 (SL2+) - Body ground and other terminals Always 10 kΩ or higher
      D1-4 (SL2-) - Body ground and other terminals Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    OK

    REPLACE ECM Click here

    NG

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


    1. Disconnect the D57 wiring harness connector connector.

    2. Disconnect the D1 ECM connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      D57-9 (SL2+) - D1-5 (SL2+) Always Below 1 Ω
      D57-8 (SL2-) - D1-4 (SL2-) Always Below 1 Ω
      D57-9 (SL2+) or D1-5 (SL2+) - Body ground and other terminals Always 10 kΩ or higher
      D57-8 (SL2-) or D1-4 (SL2-) - Body ground and other terminals Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  3. INSPECT TRANSMISSION WIRE (SOLENOID (SL2) VALVE)


    1. A01VTI7C04
      *a

      Component without harness connected

      (Transmission Wire)

      Remove the wiring harness connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      A-9 (SL2+) - A-8 (SL2-) 20°C (68°F) 5.0 to 5.6 Ω
      A-9 (SL2+) - Body ground and other terminals Always 10 kΩ or higher
      A-8 (SL2-) - Body ground and other terminals Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    OK

    REPLACE WIRING HARNESS CONNECTOR Click here

    NG

  4. INSPECT SOLENOID (SL2) VALVE


    1. A01VVIWC14
      *1 Solenoid (SL2) Valve

      Remove the solenoid (SL2) valve.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      1 - 2 20°C (68°F) 5.0 to 5.6 Ω

    3. Connect a positive (+) lead with a 21 W bulb from the battery to terminal 1 and a negative (-) lead to terminal 2 of the solenoid valve connector. Check that the valve moves and makes an operating sound.

      OK
      Valve moves and makes an operating sound.
      Result
      Proceed to
      OK
      NG

    OK

    REPLACE TRANSMISSION WIRE Click here

    NG

    REPLACE SOLENOID (SL2) VALVE Click here