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.

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    *: 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.

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  • 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.

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  • 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.

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

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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 > Lin Communication System: Rear Door RH ECU Communication Stop (B2323)
    DESCRIPTION This DTC is stored when LIN communication between the power window regulator motor assembly (for rear RH door) and main body ECU (multiplex network body ECU) stops for 10 seconds or more. DTC No. Detection Item DTC Detection Condition Trouble Area B2323 Rear Door RH ECU Co ...

    Lexus RX (RX 350L, RX450h) 2016-2025 Repair Manual > Sliding Roof / Convertible: Sliding Roof Switch Assembly
    ComponentsCOMPONENTS ILLUSTRATION *1 MAP LIGHT ASSEMBLY - - InspectionINSPECTION PROCEDURE 1. INSPECT SLIDING ROOF SWITCH (MAP LIGHT ASSEMBLY) (a) Measure the resistance according to the value(s) in the table below. Standard Resistance: Tester Connection Condition Specified C ...

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

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

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