HYBRID CONTROL SYSTEM, Diagnostic DTC:P076A15

DTC Code DTC Name
P076A15 Shift Solenoid "H" Control Circuit Short to Battery or Open

DTC SUMMARY


  1. MALFUNCTION DESCRIPTION

    The solenoid (SC1) valve is an ON/OFF solenoid that switches the clutch control valve and controls the source pressure of the solenoid (SL2) valve and solenoid (SL3) valve. This DTC indicates that the DTC detection level is high (solenoid ON state), even though the operation command from the hybrid vehicle control ECU assembly to the solenoid is OFF. The cause of this malfunction may be one of the following:


    • Open or short between solenoid (SC1) valve and hybrid vehicle control ECU assembly (If an open circuit or short circuit occurs, the hybrid vehicle control ECU assembly cuts power to the malfunctioning solenoid valve.)

    • Solenoid (SC1) valve malfunction

DESCRIPTION

Based on the ON-OFF combinations of the solenoid (SL1, SL2, SL3, SL4, SC1 and SC2) valves, the hybrid vehicle control ECU assembly performs gear shifts from 1st gear to 4th gear.

If a circuit related to a solenoid valve is open or shorted, the hybrid vehicle control ECU assembly uses the fail-safe function to turn other solenoid valves on or off.

DTC No. Detection Item DTC Detection Condition Trouble Area MIL Warning Indicate
P076A15 Shift Solenoid "H" Control Circuit Short to Battery or Open

The solenoid terminal voltage level is high, even when the hybrid vehicle control ECU assembly command the solenoid to OFF.

(1-trip detection logic)

  • Solenoid (SC1) valve

  • Transmission wire

  • Harness and connector

  • Hybrid vehicle control ECU assembly

 Comes on

Master Warning Light:

Comes on
Related Data List
DTC No. Data List
P076A15 Solenoid (SC1)*

Related Active Test
DTC No. Active Test
P076A15 Activate the Solenoid (SC1)

CONFIRMATION DRIVING PATTERN

Tech Tips

After repair has been completed, clear the DTC and then check that the vehicle has returned to normal by performing the following All Readiness check procedure.

Click here


  1. Connect the GTS to the DLC3.

  2. Turn the power switch on (IG) and turn the GTS on.

  3. Clear the DTCs (even if no DTCs are stored, perform the clear DTC procedure).

  4. Turn the power switch off and wait for 2 minutes or more.

  5. Turn the power switch on (READY) and wait for 5 seconds or more.

  6. Turn the power switch off and wait for 2 minutes or more.

  7. Enter the following menus: Powertrain / Hybrid Control / Utility / All Readiness.

  8. Check the DTC judgment result.

    Tech Tips


    • If the judgment result shows NORMAL, the system is normal.

    • If the judgment result shows ABNORMAL, the system has a malfunction.

    • If the judgment result shows INCOMPLETE or N/A, perform the normal judgment procedure again.

WIRING DIAGRAM

Refer to DTC P076A11.

Click here

PROCEDURE


  1. CHECK HARNESS AND CONNECTOR (TRANSMISSION WIRE (SOLENOID (SC1) VALVE) - HYBRID VEHICLE CONTROL ECU ASSEMBLY)


    1. B000TJCC13
      *a

      Rear view of wire harness connector

      (to Hybrid Vehicle Control ECU Assembly)

      Disconnect the A21 hybrid vehicle control ECU assembly connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      A21-3 (SC1) - Body ground 20°C (68°F) 11 to 15 Ω

    3. Reconnect the A21 hybrid vehicle control ECU assembly connector.

      Result
      Proceed to
      OK
      NG

    OK

    REPLACE HYBRID VEHICLE CONTROL ECU ASSEMBLY Click here

    NG

  2. CHECK HARNESS AND CONNECTOR (TRANSMISSION WIRE - HYBRID VEHICLE CONTROL ECU ASSEMBLY)


    1. Disconnect the G32 transmission wire connector.

    2. Disconnect the A21 hybrid vehicle control ECU assembly connector.

    3. B000TLVC06
      *a

      Front view of wire harness connector

      (to Transmission Wire)
      *b

      Rear view of wire harness connector

      (to Hybrid Vehicle Control ECU Assembly)

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      G32-4 (SC1) - A21-3 (SC1) Power switch off Below 1 Ω
      G32-4 (SC1) or A21-3 (SC1) - Other terminals Power switch off 10 kΩ or higher

    4. Reconnect the A21 hybrid vehicle control ECU assembly connector.

    5. Reconnect the G32 transmission wire connector.

      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR (TRANSMISSION WIRE - HYBRID VEHICLE CONTROL ECU ASSEMBLY)

    OK

  3. INSPECT SOLENOID (SC1) VALVE


    1. B000OFDC01
      *1 Solenoid (SC1) valve

      Remove the solenoid (SC1) valve.

      Click here

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      Terminal of solenoid (SC1) valve connector - Solenoid (SC1) valve body 20°C (68°F) 11 to 15 Ω

    3. Connect a positive (+) lead from the battery to the terminal of the solenoid valve connector, and a negative (-) lead to the solenoid body. Check that the valve moves and makes an operating sound.

      OK
      Valve moves and makes an operating sound.

    4. Install the solenoid (SC1) valve.

      Result
      Proceed to
      OK
      NG

    OK

    REPAIR OR REPLACE TRANSMISSION WIRE Click here

    NG

    REPLACE SOLENOID (SC1) VALVE Click here