AUTOMATIC TRANSAXLE SYSTEM, Diagnostic DTC:P074513

DTC Code DTC Name
P074513 Pressure Control Solenoid "A" Circuit Open

DESCRIPTION

Changing gears is performed by the ECM turning the shift solenoid valves SL1, SL2, SL3, SL4 and SL5 on and off.

If an open or short occurs in any of the shift solenoid valve circuits, the ECM controls the remaining normal shift solenoid valves to allow the vehicle to be driven. If all of the shift solenoid valves are malfunctioning, only the mechanical fluid pressure circuit will function and some manual operation will be possible. If an open or short occurs in a shift solenoid valve circuit, the ECM cuts power to the malfunctioning shift solenoid valve.

Tech Tips

The following table shows normal operation of the shift solenoid valve SL1 when the shift lever is in D.

Shift Solenoid Valve Operation:
Gear 1st 2nd 3rd 4th 5th 6th 7th 8th
Shift Solenoid Valve SL1 ON ON ON ON ON OFF OFF OFF
DTC No. Detection Item DTC Detection Condition Trouble Area MIL Memory Note
P074513 Pressure Control Solenoid "A" Circuit Open

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


  1. Driving so that gear changes occur

  2. Shift solenoid valve SL1 circuit is open or shorted

  3. 1 second

  4. 1-trip detection logic

  • Shift solenoid valve SL1

  • Transmission wire

  • Harness and connector

  • ECM

 Comes on DTC stored

SAE Code:

P0748

MONITOR DESCRIPTION

This DTC indicates an open or short in the shift solenoid valve SL1 circuit. The ECM commands gear shifts by turning the shift solenoid valves on or off. When there is an open or short in any shift solenoid valve circuit, the ECM detects the problem, illuminates the MIL and stores a DTC.

The ECM performs the fail-safe function and turns the other normal shift solenoid valves on or off. In the case of an open or short circuit, the ECM stops sending current to the open or shorted solenoid.

WIRING DIAGRAM

A01VY2TE26
*a Shift Solenoid Valve SL1
*b Transmission Wire

CAUTION / NOTICE / HINT

Note

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

Click here

Tech Tips

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.

    Click here

  2. Check for DTCs again.

    Click here

PROCEDURE


  1. CHECK HARNESS AND TRANSMISSION WIRE (TRANSMISSION WIRE (SHIFT SOLENOID VALVE SL1) - ECM)


    1. Disconnect the D2 ECM connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      D2-14 (SL1+) - D2-15 (SL1-) 20°C (68°F) 5.0 to 5.6 Ω
      D2-14 (SL1+) or D2-15 (SL1-) - Body ground and other terminals Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    NG

    CHECK HARNESS AND CONNECTOR (TRANSMISSION WIRE - ECM) Click here

    OK

  2. REPLACE ECM


    1. Replace the ECM.

      Click here

      Result
      Proceed to
      NEXT

    NEXT

    PERFORM A/T CODE REGISTRATION Click here

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


    1. Disconnect the D56 transmission wire connector.

    2. Disconnect the D2 ECM connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      D56-23 (SL1+) - D2-14 (SL1+) Always Below 1 Ω
      D56-24 (SL1-) - D2-15 (SL1-) Always Below 1 Ω
      D56-23 (SL1+) or D2-14 (SL1+) - Body ground and other terminals Always 10 kΩ or higher
      D56-24 (SL1-) or D2-15 (SL1-) - Body ground and other terminals Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR (TRANSMISSION WIRE - ECM)

    OK

  4. INSPECT SHIFT SOLENOID VALVE SL1


    1. A01VVIWC67
      *a

      Component without harness connected

      (Shift Solenoid Valve SL1)

      Remove the shift solenoid valve SL1.

      Click here

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      Shift solenoid valve SL1 connector terminal 1 - terminal 2 20°C (68°F) 5.0 to 5.6 Ω

    3. Connect a positive (+) lead from the battery to terminal 1 and a negative (-) lead with a 21 W bulb 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

    REPAIR OR REPLACE TRANSMISSION WIRE Click here

    NG

    REPLACE SHIFT SOLENOID VALVE SL1 Click here