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 (HV CPU) 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

A01NF4ZE02

INSPECTION PROCEDURE

CAUTION:


  • Before inspecting the high-voltage system or disconnecting the low voltage connector of the inverter with 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.

Tech Tips

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

PROCEDURE


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


    1. Check the connections of the power management control ECU connectors.

      A01NF3IE01
      Text in Illustration
      *1 for LHD *2 for RHD
      OK
      The connectors are connected securely and there are no contact 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. A01NFJTE01
      Text in Illustration
      *1 Power Steering Converter Assembly (without Active Stabilizer)
      *2 Power Steering Converter Assembly (with Active Stabilizer)

      Check the connections of the power steering converter assembly connector.

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

    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. A01NFJTE01
      Text in Illustration
      *1 Power Steering Converter Assembly (without Active Stabilizer)
      *2 Power Steering Converter Assembly (with Active Stabilizer)

      Disconnect connector F101 from the power steering converter assembly.

    3. A01NF68E01
      Text in Illustration
      *1

      Front view of wire harness connector

      (to Power Steering Converter Assembly (without Active Stabilizer))
      *2

      Front view of wire harness connector

      (to Power Steering Converter Assembly (with Active Stabilizer))

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

      Standard Resistance (Check for open)
      Tester Connection Switch Condition Specified Condition
      F101-6 (DDOK) - Body ground Power switch off 370 to 430 kΩ

    4. Connect the power steering converter assembly connector.


    NG

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

    OK

    REPLACE POWER STEERING CONVERTER ASSEMBLY Click here

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

    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 connector F98 from the power management control ECU.

    3. Disconnect connector F101 from the power steering converter assembly.

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

      A01NHS0E01
      Text in Illustration
      *1

      Front view of wire harness connector

      (to Power Steering Converter Assembly (without Active Stabilizer))

      		 *2

      Front view of wire harness connector

      (to Power Steering Converter Assembly (with Active Stabilizer))
      *3

      Rear view of wire harness connector

      (to Power Management Control ECU)

      		 - -
      Standard Resistance (Check for open)
      Tester Connection Switch Condition Specified Condition
      F98-18 (PSOK) - F101-6 (DDOK) Power switch off Below 1 Ω
      Standard Resistance (Check for short)
      Tester Connection Switch Condition Specified Condition
      F98-18 (PSOK) or F101-6 (DDOK) - Body ground and other terminals Power switch off 10 kΩ or higher
      Result
      Result Proceed to
      NG A
      OK (for LHD) B
      OK (for RHD) C

    5. Connect the power steering converter assembly connector.

    6. Connect the power management control ECU connector.


    B

    REPLACE POWER MANAGEMENT CONTROL ECU (for LHD) Click here

    C

    REPLACE POWER MANAGEMENT CONTROL ECU (for RHD) Click here

    A

    REPAIR OR REPLACE HARNESS OR CONNECTOR