Lexus RX (RX 350L, RX450h) 2016-2024 Repair Manual: Remote Control System does not Operate

Lexus RX (RX 350L, RX450h) 2016-2024 Repair Manual / Vehicle Exterior / Sliding Roof / Convertible / Panoramic Moon 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 wireless transmitter. 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 assembly) via LIN communication. The sliding roof ECU (sliding roof drive gear assembly) receives the signals and activates the sliding roof motor.

CAUTION / NOTICE / HINT

NOTICE:

  • The sliding roof key-linked function and sliding roof wireless transmitter-linked function are operative when the power window customize settings "Door Key P/W Up", "Door Key P/W Down" and "P/W Down W/Transmit" are set to "ON" using the Techstream. (The default setting of each is "OFF".)
  • If the sliding roof ECU (sliding roof drive gear assembly) is removed and reinstalled or replaced, the sliding roof ECU (sliding roof drive gear 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 assembly) DTC is output, perform troubleshooting for the DTC first.

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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 roof glass 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 (Panoramic Moon Roof System does not Operate)

OK

3.

REPLACE SLIDING ROOF ECU (SLIDING ROOF DRIVE GEAR ASSEMBLY)

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

Click here

NEXT

4.

INITIALIZE SLIDING ROOF ECU (SLIDING ROOF DRIVE GEAR ASSEMBLY)

(a) Initialize the sliding roof ECU (sliding roof drive gear 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 ASSEMBLY) WAS DEFECTIVE)
NG

REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU)

    Motor Control Relay Stuck ON (B2345)
    DESCRIPTION This DTC will be stored if the operation of the sliding roof or roof sunshade is suspended and a pulse input of 10 Hz or more is detected when the motor relay is off. Sliding Roof DTC N ...

    Panoramic Moon Roof System does not Operate
    DESCRIPTION The sliding roof ECU (sliding roof drive gear assembly) and roof sunshade ECU (sliding roof drive gear assembly) receive each other's position information from the main body ECU (multiplex ...

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