ROOF SUNSHADE SYSTEM, Diagnostic DTC:B2341 and B2344

DTC Code DTC Name
B2341 Sensor (Motor) Failure
B2344 Position Failure

DESCRIPTION

When the roof sunshade ECU (sliding roof drive gear assembly) detects a motor malfunction and the roof sunshade operation is stopped, DTC B2341 is stored.

When the roof sunshade ECU (sliding roof drive gear assembly) detects a gear position malfunction and the roof sunshade operation is stopped, DTC B2344 is stored.

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

B2341

Sensor (Motor) Failure

Sensor (motor) failure (When the roof sunshade ECU (sliding roof drive gear assembly) enters fail-safe mode due to a problem with the motor)

  • Roof sunshade ECU (Sliding roof drive gear assembly)

  • Roof sunshade switch (Map light assembly)

  • Wire harness or connector

B2344

Position Failure

Position failure (When the roof sunshade ECU (sliding roof drive gear assembly) enters fail-safe mode due to a problem with the gear position)

  • Roof sunshade ECU (Sliding roof drive gear assembly)

  • Roof sunshade switch (Map light assembly)

  • Wire harness or connector

WIRING DIAGRAM

B270989E03

CAUTION / NOTICE / HINT

Note:

  • When the roof sunshade ECU (sliding roof drive gear assembly) is removed and reinstalled or replaced, it requires initialization.

    Click here

  • The roof sunshade system uses the LIN communication system. First, confirm that there are no malfunctions in the LIN communication system. Refer to the How to Proceed with Troubleshooting procedure.

    Click here

PROCEDURE

  1. CHECK ROOF SUNSHADE OPERATION

    1. Check the roof sunshade auto operation.

      Click here

      OK

      Auto operation operates normally.

    Result

    Proceed to

    OK

    NG
    NG

    INITIALIZE ROOF SUNSHADE ECU (SLIDING ROOF DRIVE GEAR ASSEMBLY)Click here

    OK

  2. CHECK DTC OUTPUT

    1. Clear the DTCs.

      Click here

      Body Electrical > Sliding Roof > Clear DTCs

    2. Check for DTCs.

      Body Electrical > Sliding Roof > Trouble Codes

      OK

      DTC B2341 or B2344 is not output.

    Result

    Proceed to

    OK

    NG
    OK

    USE SIMULATION METHOD TO CHECK

    Click hereClick hereClick hereClick hereClick hereClick hereClick here

    NG

    REPLACE ROOF SUNSHADE ECU (SLIDING ROOF DRIVE GEAR ASSEMBLY)

    Click here

  3. INITIALIZE ROOF SUNSHADE ECU (SLIDING ROOF DRIVE GEAR ASSEMBLY)

    1. Check that the roof sunshade ECU (sliding roof drive gear assembly) can be initialized.

      Click here

      OK

      Roof sunshade ECU (sliding roof drive gear assembly) can be initialized.

    Result

    Proceed to

    OK

    NG
    NG

    CHECK HARNESS AND CONNECTOR (ROOF SUNSHADE ECU (SLIDING ROOF DRIVE GEAR ASSEMBLY) - ROOF SUNSHADE SWITCH (MAP LIGHT ASSEMBLY) AND BODY GROUND)Click here

    OK

  4. CHECK DTC OUTPUT

    1. Clear the DTCs.

      Click here

      Body Electrical > Sliding Roof > Clear DTCs

    2. Check for DTCs.

      Body Electrical > Sliding Roof > Trouble Codes

      OK

      DTC B2341 or B2344 is not output.

    Result

    Proceed to

    OK

    NG
    OK

    END (MALFUNCTION DUE TO INITIALIZATION FAILURE)

    NG

    REPLACE ROOF SUNSHADE ECU (SLIDING ROOF DRIVE GEAR ASSEMBLY)

    Click here

  5. CHECK HARNESS AND CONNECTOR (ROOF SUNSHADE ECU (SLIDING ROOF DRIVE GEAR ASSEMBLY) - ROOF SUNSHADE SWITCH (MAP LIGHT ASSEMBLY) AND BODY GROUND)

    1. Disconnect the O8 roof sunshade switch (map light assembly) connector.

    2. Disconnect the a1 roof sunshade ECU (sliding roof drive gear assembly) connector.

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

      Standard Resistance

      Tester Connection

      Condition

      Specified Condition

      a1-5 (CLOSE) - O8-13 (CLS)

      Always

      Below 1 Ω

      a1-5 (CLOSE) - Body ground

      Always

      10 kΩ or higher

      a1-7 (OPEN) - O8-12 (OPN)

      Always

      Below 1 Ω

      a1-7 (OPEN) - Body ground

      Always

      10 kΩ or higher

      O8-11 (GND) - Body ground

      Always

      Below 1 Ω

      a1-12 (E) - Body ground

      Always

      Below 1 Ω

    Result

    Proceed to

    OK

    NG
    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  6. INSPECT ROOF SUNSHADE SWITCH (MAP LIGHT ASSEMBLY)

    1. B319626C01

      *a

      Component without harness connected

      (Roof Sunshade Switch (Map Light Assembly))

      Remove the roof sunshade switch (map light assembly).

      Click here

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

      Standard Resistance

      Tester Connection

      Condition

      Specified Condition

      12 (OPN) - 11 (GND)

      Open switch is pressed

      Below 1 Ω

      12 (OPN) - 11 (GND)

      Open switch is not pressed

      10 kΩ or higher

      13 (CLS) - 11 (GND)

      Close switch is pressed

      Below 1 Ω

      13 (CLS) - 11 (GND)

      Close switch is not pressed

      10 kΩ or higher

    Result

    Proceed to

    OK

    NG
    OK

    REPLACE ROOF SUNSHADE ECU (SLIDING ROOF DRIVE GEAR ASSEMBLY)

    Click here

    NG

    REPLACE ROOF SUNSHADE SWITCH (MAP LIGHT ASSEMBLY)

    Click here