HYBRID CONTROL SYSTEM, Diagnostic DTC:P3086-184

DTC Code DTC Name
P3086-184 Short Circuit in DC / DC Converter EMPS

DESCRIPTION

Refer to the description for DTC P3087-183 Click here.

DTC No. INF Code DTC Detection Condition Trouble Area
P3086 184 Short to +B in the power steering converter permission signal line (PSOK)

  • Wire harness or connector

  • Power steering converter assembly

  • Power management control ECU

WIRING DIAGRAM

Refer to the wiring diagram for DTC P0AE6-225 Click here.

Refer to the wiring diagram for DTC P3087-183 Click here.

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 HARNESS AND 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

      Disconnect the connector from the power steering converter assembly.

    4. Turn the power switch on (IG).

    5. A01FQR2E01
      Text in Illustration
      *a

      Front view of wire harness connector

      (to Power Steering Converter Assembly)

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

      Standard Voltage
      Tester Connection Switch Condition Specified Condition
      X3-6 (DDOK) - Body ground Power switch on (IG) Below 1 V

      Note

      Turning the power switch on (IG) with the connector of the power steering converter assembly disconnected causes other DTCs to be stored. Clear the DTCs after performing this inspection.

    6. Turn the power switch off.

    7. Connect the power steering converter assembly connector.

    8. Install the front luggage compartment trim cover.


    NG

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

    OK

    REPLACE POWER STEERING CONVERTER ASSEMBLY Click here

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

    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. A01FUV9E01
      Text in Illustration
      *1 No. 1 Engine Room Relay Block and Junction Block Assembly
      *2 IGCT No. 5 Fuse

      Remove the IGCT No. 5 fuse from the No. 1 engine room relay block and junction block assembly.

    3. for LHD:


      1. A01FRA7E01
        Text in Illustration
        *1 Cowl Side Junction Block LH
        *2 LH-IG2 Fuse

        Remove the LH-IG2 fuse from the cowl side junction block LH.

      2. A01FSLDE01
        Text in Illustration
        *1 Cowl Side Junction Block RH
        *2 AM2 Fuse

        Remove the AM2 fuse from the cowl side junction block RH.

    4. for RHD:


      1. A01FRGIE01
        Text in Illustration
        *1 Cowl Side Junction Block LH
        *2 LH-IG2 Fuse
        *3 AM2 Fuse

        Remove the LH-IG2 fuse and AM2 fuse from the cowl side junction block LH.

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

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

      Disconnect the connector from the power steering converter assembly.

    7. Disconnect all the connectors from the power management control ECU.

    8. A01FTWRE17
      Text in Illustration
      *a

      Rear view of wire harness connector

      (to Power Management Control ECU)

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

      Standard Resistance
      Tester Connection Switch Condition Specified Condition
      N92-19 (PSOK) - A35-1 (+B2) Power switch off 10 kΩ or higher
      N92-19 (PSOK) - A36-3 (+B1) Power switch off 10 kΩ or higher
      N92-19 (PSOK) - N91-1 (AM22) Power switch off 10 kΩ or higher
      N92-19 (PSOK) - N92-7 (AM21) Power switch off 10 kΩ or higher
      N92-19 (PSOK) - A35-4 (MREL) Power switch off 10 kΩ or higher
      N92-19 (PSOK) - A36-1 (IG2) Power switch off 10 kΩ or higher
      N92-19 (PSOK) - N92-1 (ACCD) Power switch off 10 kΩ or higher
      N92-19 (PSOK) - A35-10 (ACCI) Power switch off 10 kΩ or higher
      N92-19 (PSOK) - N92-2 (IG1D) Power switch off 10 kΩ or higher
      N92-19 (PSOK) - A36-2 (IG2D) Power switch off 10 kΩ or higher
      N92-19 (PSOK) - N91-16 (SPDI) Power switch off 10 kΩ or higher
      N92-19 (PSOK) - A35-19 (GI) Power switch off 10 kΩ or higher
      N92-19 (PSOK) - A35-5 (FCTL) Power switch off 10 kΩ or higher

    9. Connect the power management control ECU connectors.

    10. Connect the power steering converter assembly connector.

    11. Install the front luggage compartment trim cover.

    12. Install the LH-IG2 fuse, AM2 fuse and IGCT No. 5 fuse.


    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

    REPLACE POWER MANAGEMENT CONTROL ECU Click here