HYBRID CONTROL SYSTEM, Diagnostic DTC:P3087-183

DTC Code DTC Name
P3087-183 Open Circuit in DC / DC Converter EMPS

DESCRIPTION

The power management control ECU requests the power steering converter to operate or stop according to the usage state of the HV battery.

DTC No. INF Code DTC Detection Condition Trouble Area
P3087 183 Open or short to GND in the power steering converter permission signal line (PSOK)

  • Wire harness or connector

  • Power management control ECU

  • Power steering converter assembly

WIRING DIAGRAM

A01FVB7E01

INSPECTION PROCEDURE

CAUTION:


  • Before inspecting the high-voltage system or disconnecting the low voltage connector of the power steering converter assembly, take safety precautions such as wearing insulated gloves and removing the service plug grip to prevent electrical shocks. After removing the service plug grip, put it in your pocket to prevent other technicians from accidentally reconnecting it while you are working on the high-voltage system.

  • After disconnecting the service plug grip, wait for at least 10 minutes before touching any of the high-voltage connectors or terminals. After waiting for 10 minutes, check the voltage at the terminals in the inspection point in the inverter with converter assembly. The voltage should be 0 V before beginning work Click here.

    Tech Tips

    Waiting for at least 10 minutes is required to discharge the high-voltage capacitor inside the inverter with converter assembly.

Note

After turning the power switch off, waiting time may be required before disconnecting the cable from the negative (-) auxiliary battery terminal. Therefore, make sure to read the disconnecting the cable from the negative (-) auxiliary battery terminal notices before proceeding with work Click here.

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 CONNECTOR CONNECTION CONDITION (POWER STEERING CONVERTER ASSEMBLY CONNECTOR)

    CAUTION:

    Be sure to wear insulated gloves.


    1. Check that the service plug grip is not installed.

      Note

      After removing the service plug grip, do not turn the power switch on (READY), unless instructed by the repair manual because this may cause a malfunction.

    2. Remove the front luggage compartment trim cover Click here.

    3. A01FVPTE01
      Text in Illustration
      *1 Power Steering Converter Assembly

      Check the connection of the power steering converter assembly connector Click here.

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

    4. Install the front luggage compartment trim cover.


    NG

    CONNECT SECURELY

    OK

  3. CHECK POWER MANAGEMENT CONTROL ECU

    CAUTION:

    Be sure to wear insulated gloves.


    1. Check that the service plug grip is not installed.

      Note

      After removing the service plug grip, do not turn the power switch on (READY), unless instructed by the repair manual because this may cause a malfunction.

    2. Remove the front luggage compartment trim cover Click here.

    3. A01FVPTE01
      Text in Illustration
      *1 Power Steering Converter Assembly

      Disconnect the connector from the power steering converter assembly.

    4. A01FQR2E01
      Text in Illustration
      *1

      Front view of wire harness connector

      (to Power Steering Converter Assembly)

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

      Standard Resistance
      Tester Connection Switch Condition Specified Condition
      X3-6 (DDOK) - Body ground Power switch off 370 to 430 kΩ

    5. Connect the power steering converter assembly connector.

    6. Install the front luggage compartment trim cover.


    NG

    CHECK HARNESS AND CONNECTOR (POWER STEERING CONVERTER ASSEMBLY - POWER MANAGEMENT CONTROL ECU) Click here

    OK

    REPLACE POWER STEERING CONVERTER ASSEMBLY Click here

  4. CHECK HARNESS AND CONNECTOR (POWER STEERING CONVERTER ASSEMBLY - POWER MANAGEMENT CONTROL ECU)

    CAUTION:

    Be sure to wear insulated gloves.


    1. Check that the service plug grip is not installed.

      Note

      After removing the service plug grip, do not turn the power switch on (READY), unless instructed by the repair manual because this may cause a malfunction.

    2. Disconnect the connector from the power management control ECU.

    3. Remove the front luggage compartment trim cover Click here.

    4. Disconnect the connector from the power steering converter assembly.

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

      A01FV3VE01
      Text in Illustration
      *a

      Front view of wire harness connector

      (to Power Steering Converter Assembly)

      		 *b

      Rear view of wire harness connector

      (to Power Management Control ECU)
      Standard Resistance
      Tester Connection Switch Condition Specified Condition
      X3-6 (DDOK) - N92-19 (PSOK) Power switch off Below 1 Ω
      X3-6 (DDOK) or N92-19 (PSOK) - Body ground and other terminals Power switch off 10 kΩ or higher

    6. Connect the power steering converter assembly connector.

    7. Install the front luggage compartment trim cover.

    8. Connect the power management control ECU connector.


    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

    REPLACE POWER MANAGEMENT CONTROL ECU Click here