Lexus RX (RX 350L, RX450h) 2016-2026 Repair Manual: Position Initialization Incomplete (B2343)

Lexus RX (RX 350L, RX450h) 2016-2026 Repair Manual / Vehicle Exterior / Sliding Roof / Convertible / Sliding Roof System / Position Initialization Incomplete (B2343)

DESCRIPTION

This DTC is stored when the sliding roof ECU (sliding roof drive gear sub-assembly) has not been initialized.

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

B2343

Position Initialization Incomplete

Sliding roof ECU (sliding roof drive gear sub-assembly) has not been initialized

Sliding roof ECU (Sliding roof drive gear sub-assembly)

WIRING DIAGRAM

Refer to DTC B2341.

Click here

CAUTION / NOTICE / HINT

NOTICE:

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

    Click here

  • The sliding 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

HINT:

When DTC B2342 and B2343 are output simultaneously, perform troubleshooting for DTC B2342 first.

PROCEDURE

1.

INITIALIZE SLIDING ROOF ECU (SLIDING ROOF DRIVE GEAR SUB-ASSEMBLY)

(a) Check that the sliding roof ECU (sliding roof drive gear sub-assembly) can be initialized.

Click here

OK:

Sliding roof ECU (sliding roof drive gear sub-assembly) can be initialized.

NG

REPLACE SLIDING ROOF ECU (SLIDING ROOF DRIVE GEAR SUB-ASSEMBLY)

OK

2.

CHECK SLIDING ROOF OPERATION

(a) Check the sliding roof auto operation.

Click here

OK:

Auto operation operates normally.

NG

REPLACE SLIDING ROOF ECU (SLIDING ROOF DRIVE GEAR SUB-ASSEMBLY)

OK

3.

CHECK DTC OUTPUT

(a) Clear the DTCs.

Click here

Body Electrical > Sliding Roof > Clear DTCs

(b) Check for DTCs.

Body Electrical > Sliding Roof > Trouble Codes

OK:

DTC B2343 is not output.

OK

END (MALFUNCTION DUE TO INITIALIZATION FAILURE)
NG

REPLACE SLIDING ROOF ECU (SLIDING ROOF DRIVE GEAR SUB-ASSEMBLY)

    Switch Failure (B2342)
    DESCRIPTION This DTC is stored when the sliding roof ECU (sliding roof drive gear sub-assembly) detects that the sliding roof switch (map light assembly) is stuck for 30 seconds or more. DTC No. ...

    Key-off Operation Function Operates even if Operating Conditions are not Satisfied
    DESCRIPTION The sliding roof ECU (sliding roof drive gear sub-assembly) operates its built-in motor according to the sliding roof switch (map light assembly) operation. Using the sliding roof switch ( ...

    Other materials:

    Lexus RX (RX 350L, RX450h) 2016-2026 Repair Manual > Meter / Gauge System: Problem Symptoms Table
    PROBLEM SYMPTOMS TABLE NOTICE: Before replacing the ECM, main body ECU (multiplex network body ECU) or Certification ECU (Smart key ECU assembly), refer to Registration. Click here HINT: Use the table below to help determine the cause of problem symptoms. If multiple suspected areas are listed ...

    Lexus RX (RX 350L, RX450h) 2016-2026 Repair Manual > Vacuum Pump: Reassembly
    REASSEMBLY PROCEDURE 1. INSTALL VACUUM PUMP VANE (for TMC Made) (a) Apply engine oil to the vacuum pump vane and vacuum pump vane caps and install the vacuum pump vane caps to the vacuum pump vane. (b) Apply engine oil to the vacuum pump vane with vacuum pump vane caps and install it to the vacuum p ...

    Lexus RX (RX 350L, RX450h) 2016-{YEAR} Owners Manual

    Lexus RX (RX 350L, RX450h) 2016-{YEAR} Repair Manual

    © 2026 Copyright www.lexusrx.net
    0.0164