Lexus RX (RX 350L, RX450h) 2016-2025 Repair Manual: Remote Control System does not Operate

Lexus RX (RX 350L, RX450h) 2016-2025 Repair Manual / Vehicle Exterior / Sliding Roof / Convertible / Sliding Roof System / Remote Control System does not Operate

DESCRIPTION

The main body ECU (multiplex network body ECU) receives remote control signals from the driver door key cylinder or electrical key transmitter sub-assembly. Then, the main body ECU (multiplex network body ECU) activates the power window motor and sends the remote control signals to the sliding roof ECU (sliding roof drive gear sub-assembly) via LIN communication. The sliding roof ECU (sliding roof drive gear sub-assembly) receives those signals and activates the sliding roof motor.

CAUTION / NOTICE / HINT

NOTICE:

  • The sliding roof key-linked function and sliding roof wireless transmitter-linked function* can be customized. Make sure that the customize settings of both functions are set to ON.

    Click here

    *: w/o Canister Pump Module

  • 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 CAN and LIN communication systems. First, confirm that there are no malfunctions in the CAN and LIN communication systems. Refer to How to Proceed with Troubleshooting.

    Click here

  • If a sliding roof ECU (sliding roof drive gear sub-assembly) DTC is output, first perform troubleshooting for the sliding roof ECU (sliding roof drive gear sub-assembly) DTC.

    Click here

  • Before replacing the main body ECU (multiplex network body ECU), refer to Registration.

    Click here

PROCEDURE

1.

CHECK REMOTE CONTROL FUNCTION

(a) Check the key-linked and wireless transmitter-linked functions.

Click here

Result

Proceed to

Both the power windows and sliding roof operate by the key-linked and wireless transmitter-linked functions.

A

The sliding roof does not operate by the key-linked or wireless transmitter-linked function, but all of the power windows operate.

B

Both the power windows and sliding roof do not operate by the key-linked or wireless transmitter-linked function.

C
A

USE SIMULATION METHOD TO CHECK

C

GO TO POWER WINDOW CONTROL SYSTEM

B

2.

CHECK SLIDING ROOF OPERATION

(a) Check the sliding roof operation.

Click here

OK:

Sliding roof operates normally.

NG

GO TO OTHER PROBLEM (Sliding Roof does not Move by Operating Sliding Roof Control Switch)

OK

3.

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

(a) Replace the sliding roof ECU (sliding roof drive gear sub-assembly).

Click here

NEXT

4.

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

(a) Initialize the sliding roof ECU (sliding roof drive gear sub-assembly).

Click here

NEXT

5.

CHECK REMOTE CONTROL FUNCTION

(a) Check the key-linked and wireless transmitter-linked functions.

Click here

OK:

The key-linked and wireless transmitter-linked functions operate normally.

OK

END (SLIDING ROOF ECU (SLIDING ROOF DRIVE GEAR SUB-ASSEMBLY) WAS DEFECTIVE)
NG

REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU)

    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 ( ...

    Sliding Roof does not Move by Operating Sliding Roof Control Switch
    DESCRIPTION The sliding roof ECU (sliding roof drive gear sub-assembly) receives slide and tilt signals and operates its built-in motor when the sliding roof switch (map light assembly) is operated. W ...

    Other materials:

    Lexus RX (RX 350L, RX450h) 2016-2025 Repair Manual > Power Window Control System: Problem Symptoms Table
    PROBLEM SYMPTOMS TABLE NOTICE: Before replacing the main body ECU (multiplex network body ECU), refer to Registration. Click here HINT: Use the table below to help determine the cause of problem symptoms. If multiple suspected areas are listed, the potential causes of the symptoms are l ...

    Lexus RX (RX 350L, RX450h) 2016-2025 Repair Manual > Can Communication System: Open in One Side of Bus 4 Branch Line
    DESCRIPTION If an ECU or sensor is not displayed on the CAN Bus Check screen of the Techstream and some ECUs and sensors repeatedly appear and disappear from the screen when the CAN main bus lines are normal (there is no open, short, short to +B or short to GND in the main bus lines), there may be a ...

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

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

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