HYBRID CONTROL SYSTEM, Diagnostic DTC:P0722-854

DTC Code DTC Name
P0722-854 Output Speed Sensor Circuit No Signal

DESCRIPTION

The transmission revolution sensor (SP2) sends the output shaft rotation speed signal to the power management control ECU.

DTC No. INF Code DTC Detection Condition Trouble Area
P0722 854 Pulses are not input from the transmission revolution sensor (SP2) to the power management control ECU when the velocity of the vehicle (calculated from the engine speed and MG2 speed) is more than the specified value.

  • Wire harness or connector

  • Hybrid vehicle transmission assembly

  • Power management control ECU

WIRING DIAGRAM

A000OD9E03
*a Transmission Revolution Sensor (SP2)
*b Hybrid Vehicle Transmission Assembly
*c Power Management Control ECU

CAUTION / NOTICE / HINT

Tech Tips

Driving at speeds above 25 mph (40 km/h) will make this problem easier to reproduce. There is a possibility that the speed of the vehicle will change rapidly (deceleration may occur) when the DTC is stored. For this reason, it is preferable to use a chassis dynamometer (AWD type) when trying to reproduce this problem.

PROCEDURE


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


    1. B002B9CE01
      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 TRANSMISSION REVOLUTION SENSOR (SP2)


    1. A000RTQE02
      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. Measure the resistance according to the value(s) in the table below.

      Standard Resistance
      Tester Connection Condition Specified Condition
      A36-25 (SP2+) - A36-24 (SP2-) Approximately 68°F (20°C) 560 to 680 Ω

    3. Connect the power management control ECU connector.


    NG

    CHECK CONNECTOR CONNECTION CONDITION (TRANSMISSION REVOLUTION SENSOR (SP2) CONNECTOR) Click here

    OK

  3. CHECK POWER MANAGEMENT CONTROL ECU (CHECK WAVEFORM)


    1. A000QQWE02
      Text in Illustration
      *a

      Component with harness connected

      (Power Management Control ECU)

      Connect an oscilloscope to the power management control ECU terminals specified in the following table, and measure the waveform.

      Item Contents
      Terminal A36-24 (SP2-) - A36-25 (SP2+)
      Equipment Setting 2 V/DIV., 2 ms./DIV.
      Condition Driving at approximately 34 mph (55 km/h)
      OK
      The waveform appears as shown in the illustration.

      Tech Tips

      The higher the vehicle speed, the shorter the cycle.

    2. Turn the power switch off.


    NG

    REPLACE HYBRID VEHICLE TRANSMISSION ASSEMBLY Click here

    OK

  4. CHECK FOR INTERMITTENT PROBLEMS

    Click here


    OK

    REPLACE POWER MANAGEMENT CONTROL ECU Click here

    NG

    REPAIR OR REPLACE MALFUNCTIONING PARTS, COMPONENT AND AREA

  5. CHECK CONNECTOR CONNECTION CONDITION (TRANSMISSION REVOLUTION SENSOR (SP2) CONNECTOR)


    1. A000S1L

      Check the connection of the transmission revolution sensor (SP2) connector Click here.

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

    NG

    CONNECT SECURELY

    OK

  6. CHECK HARNESS AND CONNECTOR (TRANSMISSION REVOLUTION SENSOR (SP2) - POWER MANAGEMENT CONTROL ECU)


    1. A000ON8E02
      Text in Illustration
      *a

      Rear view of wire harness connector

      (to Power Management Control ECU)
      *b

      Front view of wire harness connector

      (to Transmission Revolution Sensor (SP2))

      Disconnect the power management control ECU connector.

    2. Disconnect the transmission revolution sensor (SP2) 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
      A36-24 (SP2-) - Body ground Power switch on (IG) Below 1 V
      A36-25 (SP2+) - 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
      A36-24 (SP2-) - F55-1 (NC2-) Power switch off Below 1 Ω
      A36-25 (SP2+) - F55-2 (NC2+) Power switch off Below 1 Ω
      A36-24 (SP2-) or F55-1 (NC2-) - Body ground and other terminals Power switch off 10 kΩ or higher
      A36-25 (SP2+) or F55-2 (NC2+) - Body ground and other terminals Power switch off 10 kΩ or higher

      Tech Tips

      The transmission revolution sensor 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 revolution sensor (SP2) connector.


    OK

    REPLACE HYBRID VEHICLE TRANSMISSION ASSEMBLY Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR