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

For a description of the hybrid vehicle transmission assembly, Click here.

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

  • Wire harness or connector

  • Hybrid vehicle transmission assembly

  • Hybrid vehicle control ECU
P2721 853 Open or short to +B in the SP solenoid valve circuit

WIRING DIAGRAM

A000V69E02
*a SP
*b E64 Hybrid Vehicle Transmission Assembly
*c E58 Hybrid Vehicle Control ECU

PROCEDURE


  1. CHECK CONNECTOR CONNECTION CONDITION (HYBRID VEHICLE CONTROL ECU CONNECTOR)


    1. A000XH7E01
      *1 Hybrid Vehicle Control ECU

      Check the connections of the hybrid vehicle control ECU connectors.

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

    NG

    CONNECT SECURELY

    OK

  2. CHECK HYBRID VEHICLE TRANSMISSION ASSEMBLY (SP SOLENOID)


    1. A000UU9E01
      *1 Rear view of wire harness connector: (to Hybrid Vehicle Control ECU)
      *2 SP

      Turn the power switch off.

    2. Disconnect connector E58 from the hybrid vehicle control ECU.

    3. Turn the power switch on (IG).

      Note

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

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

      Standard voltage
      Tester Connection Switch Condition Specified Condition
      E58-8 (SP) - Body ground Power switch on (IG) Below 1 V

    5. Turn the power switch off.

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

      Standard resistance (Check for open)
      Tester Connection Switch Condition Specified Condition
      E58-8 (SP) - Body ground

      Power switch off

      (-10°C (14° F))

      11.47 Ω

      (Reference)

      Power switch off

      (20°C (68° F))

      		 11 to 15 Ω

      Power switch off

      (80°C (176° F))

      16.06 Ω

      (Reference)

      Power switch off

      (120°C (248° F))

      18.11 Ω

      (Reference)
      Standard resistance (Check for short)
      Tester Connection Switch Condition Specified Condition
      E58-8 (SP) - Body ground and other terminals Power switch off 10 kΩ or higher

    NG

    CHECK CONNECTOR CONNECTION CONDITION (TRANSMISSION WIRE CONNECTOR) Click here

    OK

  3. CHECK FOR INTERMITTENT PROBLEMS


    1. Check for intermittent problems Click here.


    OK

    REPLACE HYBRID VEHICLE CONTROL ECU Click here

    NG

    REPAIR OR REPLACE MALFUNCTIONING PARTS, COMPONENT AND AREA

  4. CHECK CONNECTOR CONNECTION CONDITION (TRANSMISSION WIRE CONNECTOR)


    1. A000TLIE01
      *1 Transmission Wire

      Check the connection of the transmission wire connector.

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

    NG

    CONNECT SECURELY

    OK

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


    1. A000V2BE01
      *1 Front view of wire harness connector: (to Transmission Wire)
      *2 SP
      *3 Rear view of wire harness connector: (to Hybrid Vehicle Control ECU)

      Disconnect the transmission wire connector.

    2. Turn the power switch on (IG).

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

      Standard voltage
      Tester Connection Switch Condition Specified Condition
      E58-8 (SP) - Body ground Power switch on (IG) Below 1 V

      Note

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

    4. Turn the power switch off.

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

      Standard resistance (Check for open)
      Tester Connection Switch Condition Specified Condition
      E58-8 (SP) - E64-4 (SP) Power switch off Below 1 Ω
      Standard resistance (Check for short)
      Tester Connection Switch Condition Specified Condition
      E58-8 (SP) or E64-4 (SP) - Body ground and other terminals Power switch off 10 kΩ or higher

      Tech Tips

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


    OK

    REPLACE HYBRID VEHICLE TRANSMISSION ASSEMBLY Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR