ROOF SUNSHADE SYSTEM, Diagnostic DTC:B2341, 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 output.

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 output.

DTC Code DTC Detection Condition Trouble Area
B2341 Sensor (motor) failure (When the ECU 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 (When the ECU 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

B005ZM3E01

CAUTION / NOTICE / HINT

Note


  • Inspect the fuses for circuits related to this system before performing the following inspection procedure.

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

PROCEDURE


  1. CHECK ROOF SUNSHADE OPERATION


    1. Check the roof sunshade auto operation Click here.

      OK
      Auto operation operates normally.

    NG

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

    OK

  2. CHECK DTC OUTPUT


    1. Clear the DTCs Click here.

    2. Recheck for DTCs.

      OK
      DTC B2341 or B2344 is not output.

    OK

    USE SIMULATION METHOD TO CHECK Click 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.

    NG

    CHECK HARNESS AND CONNECTOR (ROOF SUNSHADE ECU - ROOF SUNSHADE SWITCH) Click here

    OK

  4. CHECK DTC OUTPUT


    1. Clear the DTCs Click here.

    2. Recheck for DTCs.

      OK
      DTC B2341 or B2344 is not output.

    OK

    END

    NG

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

  5. CHECK HARNESS AND CONNECTOR (ROOF SUNSHADE ECU - ROOF SUNSHADE SWITCH)


    1. Disconnect the U3 roof sunshade switch (map light assembly) connector.

    2. Disconnect the z21 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
      z21-9 (CLS) - U3-8 (CLS) Always Below 1 Ω
      z21-9 (CLS) - Body ground Always 10 kΩ or higher
      z21-7 (OPN) - U3-9 (OPN) Always Below 1 Ω
      z21-7 (OPN) - Body ground Always 10 kΩ or higher
      U3-15 (GND1) - Body ground Always Below 1 Ω
      z21-2 (E) - Body ground Always Below 1 Ω

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  6. INSPECT ROOF SUNSHADE SWITCH (MAP LIGHT ASSEMBLY)


    1. B005ZK1E01
      Text in Illustration
      *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
      8 (CLS) - 15 (GND1) CLOSE switch is pressed Below 1 Ω
      8 (CLS) - 15 (GND1) CLOSE switch is not pressed 10 kΩ or higher
      9 (OPN) - 15 (GND1) OPEN switch is pressed Below 1 Ω
      9 (OPN) - 15 (GND1) OPEN switch is not pressed 10 kΩ or higher

    OK

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

    NG

    REPLACE ROOF SUNSHADE SWITCH (MAP LIGHT ASSEMBLY) Click here