PANORAMIC MOON ROOF SYSTEM, Diagnostic DTC:B2341, B2344

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

DESCRIPTION

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

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

Sliding Roof
DTC No. Detection Item DTC Detection Condition Trouble Area
B2341 Sensor (Motor) Failure Sensor (motor) failure (When the sliding roof ECU (sliding roof drive gear assembly) enters fail-safe mode due to a problem with the motor)

  • Sliding roof ECU (Sliding roof drive gear assembly)

  • Map light assembly

  • Wire harness or connector
B2344 Position Failure Position failure (When the sliding roof ECU (sliding roof drive gear assembly) enters fail-safe mode due to a problem with the gear position)

  • Sliding roof ECU (Sliding roof drive gear assembly)

  • Map light assembly

  • Wire harness or connector
Sliding Sunshade
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)

  • 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)

  • Map light assembly

  • Wire harness or connector

WIRING DIAGRAM

B005LHYE01
B005P4QE01
*1 Main Body ECU (Multiplex Network Body ECU)
*2 LIN Communication Line

CAUTION / NOTICE / HINT

Note


  • If the sliding roof ECU (sliding roof drive gear assembly) or roof sunshade ECU (sliding roof drive gear assembly) is removed and reinstalled or replaced, the sliding roof ECU (sliding roof drive gear assembly) or roof sunshade ECU (sliding roof drive gear assembly) must be initialized.

    Click here

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

    Click here

  • DTCs B2341 and B2344 are stored in the sliding roof ECU (sliding roof drive gear assembly) and roof sunshade ECU (sliding roof drive gear assembly).

PROCEDURE


  1. CHECK FOR DTC


    1. Clear the DTCs.

      Click here


      Body Electrical > Sliding Roof > Clear DTCs
      Body Electrical > Sliding Sunshade > Clear DTCs

    2. Check for DTCs.

      Click here


      Body Electrical > Sliding Roof > Trouble Codes
      Body Electrical > Sliding Sunshade > Trouble Codes
      OK
      DTCs B2341 and B2344 are not output.
      Result
      Proceed to
      OK
      NG

    OK

    USE SIMULATION METHOD TO CHECK Click here

    NG

  2. CHECK DTC OUTPUT


    1. Check the parts from which this DTC has been output.

      Result
      Result Proceed to
      DTC output from sliding roof ECU (sliding roof drive gear assembly) A
      DTC output from roof sunshade ECU (sliding roof drive gear assembly) B

    B

    CHECK ROOF SUNSHADE OPERATION Click here

    A

  3. CHECK SLIDING ROOF OPERATION


    1. Check the sliding roof auto operation function.

      Click here

      OK
      Auto operation function operates normally.
      Result
      Proceed to
      OK
      NG

    NG

    INITIALIZE SLIDING ROOF ECU (SLIDING ROOF DRIVE GEAR ASSEMBLY) 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
      DTCs B2341 and B2344 are not output.
      Result
      Proceed to
      OK
      NG

    OK

    USE SIMULATION METHOD TO CHECK Click here

    NG

    REPLACE SLIDING ROOF ECU (SLIDING ROOF DRIVE GEAR ASSEMBLY) Click here

  5. INITIALIZE SLIDING ROOF ECU (SLIDING ROOF DRIVE GEAR ASSEMBLY)


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

      Click here

      OK
      Sliding roof ECU (sliding roof drive gear assembly) can be initialized.
      Result
      Proceed to
      OK
      NG

    NG

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

    OK

  6. 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
      DTCs B2341 and B2344 are not output.
      Result
      Proceed to
      OK
      NG

    OK

    END (MALFUNCTION DUE TO INITIALIZATION FAILURE)

    NG

    REPLACE SLIDING ROOF ECU (SLIDING ROOF DRIVE GEAR ASSEMBLY) Click here

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


    1. Disconnect the U2 sliding roof ECU (sliding roof drive gear assembly) connector.

    2. Disconnect the U11 map light assembly connector.

    3. Disconnect the w1 roof sunshade ECU (sliding roof drive gear assembly) connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      U2-8 (CLS) - U11-12 (CLS) Always Below 1 Ω
      U2-8 (CLS) or U11-12 (CLS) - Body ground Always 10 kΩ or higher
      U2-10 (OPN) - U11-11 (OPN) Always Below 1 Ω
      U2-10 (OPN) or U11-11 (OPN) - Body ground Always 10 kΩ or higher
      U2-4 (TILT) - U11-7 (B) Always Below 1 Ω
      U2-4 (TILT) or U11-7 (B) - Body ground Always 10 kΩ or higher
      U2-5 (OPN) - U11-23 (OPN) Always Below 1 Ω
      U2-5 (OPN) or U11-23 (OPN) - Body ground Always 10 kΩ or higher
      U2-9 (CLS) - U11-24 (DOWN) Always Below 1 Ω
      U2-9 (CLS) or U11-24 (DOWN) - Body ground Always 10 kΩ or higher
      U2-2 (E) - Body ground Always Below 1 Ω
      U11-19 (GND) - Body ground Always Below 1 Ω
      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  8. INSPECT MAP LIGHT ASSEMBLY


    1. Remove the map light assembly.

      Click here

    2. Inspect the map light assembly.

      Click here

      Result
      Proceed to
      OK
      NG

    OK

    REPLACE SLIDING ROOF ECU (SLIDING ROOF DRIVE GEAR ASSEMBLY) Click here

    NG

    REPLACE MAP LIGHT ASSEMBLY Click here

  9. CHECK ROOF SUNSHADE OPERATION


    1. Check the roof sunshade auto operation function.

      Click here

      OK
      Auto operation function operates normally.
      Result
      Proceed to
      OK
      NG

    NG

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

    OK

  10. CHECK DTC OUTPUT


    1. Clear the DTCs.

      Click here


      Body Electrical > Sliding Sunshade > Clear DTCs

    2. Check for DTCs.


      Body Electrical > Sliding Sunshade > Trouble Codes
      OK
      DTCs B2341 and B2344 are not output.
      Result
      Proceed to
      OK
      NG

    OK

    USE SIMULATION METHOD TO CHECK Click here

    NG

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

  11. 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) - MAP LIGHT ASSEMBLY AND BODY GROUND) Click here

    OK

  12. CHECK DTC OUTPUT


    1. Clear the DTCs.

      Click here


      Body Electrical > Sliding Sunshade > Clear DTCs

    2. Check for DTCs.


      Body Electrical > Sliding Sunshade > Trouble Codes
      OK
      DTCs B2341 and B2344 are 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

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


    1. Disconnect the w1 roof sunshade ECU (sliding roof drive gear assembly) connector.

    2. Disconnect the U11 map light assembly connector.

    3. Disconnect the U2 sliding roof ECU (sliding roof drive gear assembly) connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      w1-8 (CLS) - U11-12 (CLS) Always Below 1 Ω
      w1-8 (CLS) or U11-12 (CLS) - Body ground Always 10 kΩ or higher
      w1-10 (OPN) - U11-11 (OPN) Always Below 1 Ω
      w1-10 (OPN) or U11-11 (OPN) - Body ground Always 10 kΩ or higher
      w1-4 (TILT) - U11-7 (B) Always Below 1 Ω
      w1-4 (TILT) or U11-7 (B) - Body ground Always 10 kΩ or higher
      w1-5 (OPN) - U11-23 (UP) Always Below 1 Ω
      w1-5 (OPN) or U11-23 (UP) - Body ground Always 10 kΩ or higher
      w1-9 (CLS) - U11-24 (DOWN) Always Below 1 Ω
      w1-9 (CLS) or U11-24 (DOWN) - Body ground Always 10 kΩ or higher
      w1-2 (E) - Body ground Always Below 1 Ω
      U11-19 (GND) - Body ground Always Below 1 Ω
      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  14. INSPECT MAP LIGHT ASSEMBLY


    1. Remove the map light assembly.

      Click here

    2. Inspect the map light assembly.

      Click here

      Result
      Proceed to
      OK
      NG

    OK

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

    NG

    REPLACE MAP LIGHT ASSEMBLY Click here