HYBRID CONTROL SYSTEM, Diagnostic DTC:P2720-852, P2721-853

DTC Code DTC Name
P2720-852 Pressure Control Solenoid Circuit Low Voltage
P2721-853 Pressure Control Solenoid Circuit High Voltage

DESCRIPTION

Refer to the description for DTC P0731-871 Click here.

DTC No. INF Code DTC Detection Condition Trouble Area
P2720 852 Short in the solenoid valve (SP) circuit

  • Wire harness or connector

  • Hybrid vehicle transmission assembly

  • Power management control ECU
P2721 853 Open or short to +B in the solenoid valve (SP) circuit

WIRING DIAGRAM

Refer to the wiring diagram for DTC P0731-871 Click here.

INSPECTION PROCEDURE

PROCEDURE


  1. CHECK CONNECTOR CONNECTION CONDITION (POWER MANAGEMENT CONTROL ECU CONNECTOR)


    1. A01FQC6E01
      Text in Illustration
      *A for LHD
      *B for RHD

      Check the connector connections and contact pressure of the relevant terminals for the power management control ECU connectors Click here.

      OK
      The connectors are connected securely and there are no contact pressure problems.

    NG

    CONNECT SECURELY

    OK

  2. CHECK HYBRID VEHICLE TRANSMISSION ASSEMBLY (SOLENOID VALVE (SP))


    1. A01FQ69E22
      Text in Illustration
      *a

      Rear view of wire harness connector

      (to Power Management Control ECU)

      Disconnect the connector from the power management control ECU.

    2. Turn the power switch on (IG).

      Note

      Turning the power switch on (IG) with the power management control ECU connector disconnected causes other DTCs to be stored. Clear the DTCs after performing this inspection.

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

      Standard Voltage
      Tester Connection Switch Condition Specified Condition
      A36-7 (SP) - Body ground Power switch on (IG) Below 1 V

    4. Turn the power switch off.

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

      Standard Resistance
      Tester Connection Switch Condition Specified Condition
      A36-7 (SP) - Body ground

      Power switch off

      (68°F (20°C))

      		 11 to 15 Ω
      Standard Resistance
      Tester Connection Switch Condition Specified Condition
      A36-7 (SP) - Body ground and other terminals Power switch off 10 kΩ or higher

    6. Connect the power management control ECU connector.


    NG

    Click here

    OK

  3. CHECK FOR INTERMITTENT PROBLEMS

    Click here


    NG

    REPAIR OR REPLACE MALFUNCTIONING PARTS, COMPONENT AND AREA

    OK

    REPLACE POWER MANAGEMENT CONTROL ECU Click here

  4. CHECK CONNECTOR CONNECTION CONDITION (TRANSMISSION WIRE CONNECTOR)


    1. A01FQ02

      Check the connection of the transmission wire connector Click here.

      OK
      The connector is connected securely and there are no contact problems.

    NG

    CONNECT SECURELY

    OK

  5. CHECK HARNESS AND CONNECTOR (POWER MANAGEMENT CONTROL ECU - TRANSMISSION WIRE)


    1. A01FRYNE03
      Text in Illustration
      *a

      Rear view of wire harness connector

      (to Power Management Control ECU)
      *b

      Front view of wire harness connector

      (to Transmission Wire)

      Disconnect the power management control ECU connector.

    2. Disconnect the transmission wire connector.

    3. Turn the power switch on (IG).

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

      Standard Voltage
      Tester Connection Switch Condition Specified Condition
      A36-7 (SP) - Body ground Power switch on (IG) Below 1 V

      Note

      Turning the power switch on (IG) with the power management control ECU connector disconnected causes other DTCs to be stored. Clear the DTCs after performing this inspection.

    5. Turn the power switch off.

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

      Standard Resistance
      Tester Connection Switch Condition Specified Condition
      A36-7 (SP) - F52-4 (SP) Power switch off Below 1 Ω
      A36-7 (SP) or F52-4 (SP) - Body ground and other terminals Power switch off 10 kΩ or higher

      Tech Tips

      The solenoid valve (SP) is not available separately. If it requires replacement, replace the hybrid vehicle transmission assembly

    7. Connect the power management control ECU connector.

    8. Connect the transmission wire connector.


    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

    REPLACE HYBRID VEHICLE TRANSMISSION ASSEMBLY Click here