Lexus RX (RX 350L, RX450h) 2016-2025 Repair Manual: Headlight Swivel Motor LH (B2412,B2413,B2417,B2418)

Lexus RX (RX 350L, RX450h) 2016-2025 Repair Manual / Vehicle Exterior / Lighting (ext) / Lighting System (w/ Automatic Headlight Beam Level Control System) / Headlight Swivel Motor LH (B2412,B2413,B2417,B2418)

DESCRIPTION

The No. 1 headlight ECU sub-assembly LH sends automatic headlight beam level control signals to each headlight swivel motor and headlight leveling motor via LIN communication.

Each No. 1 headlight ECU sub-assembly and headlight swivel motor and headlight leveling motor communicate via LIN communication.

The headlight swivel motor and headlight leveling motor operates according to power supplied and automatic headlight beam level control signals from its respective No. 1 headlight ECU sub-assembly and sends its operating state to the No. 1 headlight ECU sub-assembly.

The No. 1 headlight ECU sub-assembly LH stores a DTC if it detects that a headlight swivel motor and headlight leveling motor is malfunctioning.

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

DTC Output from

B2412

Headlight Swivel Motor LH
  • The engine switch is on (IG).
  • Headlight swivel motor malfunction detected
  • -

Headlight unit LH

AFS

B2413

Headlight Swivel Motor RH
  • The engine switch is on (IG).
  • Headlight swivel motor malfunction detected
  • -

Headlight unit RH

AFS

B2417

Headlight Beam Level Control Motor LH
  • The engine switch is on (IG).
  • Headlight leveling motor malfunction detected
  • -

Headlight unit LH

AFS

B2418

Headlight Beam Level Control Motor RH
  • The engine switch is on (IG).
  • Headlight leveling motor malfunction detected
  • -

Headlight unit RH

AFS

WIRING DIAGRAM

CAUTION / NOTICE / HINT

NOTICE:

  • If the No. 1 headlight ECU sub-assembly LH has been replaced, it is necessary to synchronize the vehicle information and initialize the No. 1 headlight ECU sub-assembly LH.

    Click here

  • If the headlight assembly LH has been replaced, it is necessary to synchronize the vehicle information and initialize the No. 1 headlight ECU sub-assembly LH.*

    Click here

  • When replacing the No. 1 headlight ECU sub-assembly LH, always replace it with a new one. If a No. 1 headlight ECU sub-assembly LH which was installed to another vehicle is used, the information stored in it will not match the information from the vehicle and a DTC may be stored.
  • When replacing the headlight assembly LH, always replace it with a new one. If a headlight assembly LH which was installed to another vehicle is used, the information stored in it will not match the information from the vehicle and a DTC may be stored.*
    • *: for TMMC Made

PROCEDURE

1.

CONFIRM MODEL

(a) Choose the model to be inspected.

Result

Proceed to

for TMC Made

A

for TMMC Made

B
B

GO TO STEP 4

A

2.

CLEAR DTC

(a) Connect the Techstream to the DLC3.

(b) Turn the engine switch on (IG).

(c) Turn the Techstream on.

(d) Enter the following menus: Body Electrical / AFS / Trouble Codes.

(e) Clear the DTCs.

Body Electrical > AFS > Clear DTCs
NEXT

3.

CHECK FOR DTC

(a) Connect the Techstream to the DLC3.

(b) Turn the engine switch on (IG).

(c) Turn the Techstream on.

(d) Enter the following menus: Body Electrical / AFS / Trouble Codes.

(e) Check for DTCs.

Body Electrical > AFS > Trouble Codes

OK:

DTC B2412, B2413, B2417 and B2418 are not output.

Result

Proceed to

OK

A

NG (DTC B2412 or B2417 is output)

B

NG (DTC B2413 or B2418 is output)

C
A

USE SIMULATION METHOD TO CHECK

B

REPLACE HEADLIGHT UNIT LH

C

REPLACE HEADLIGHT UNIT RH

4.

CLEAR DTC

(a) Connect the Techstream to the DLC3.

(b) Turn the engine switch on (IG).

(c) Turn the Techstream on.

(d) Enter the following menus: Body Electrical / AFS / Trouble Codes.

(e) Clear the DTCs.

Body Electrical > AFS > Clear DTCs
NEXT

5.

CHECK FOR DTC

(a) Connect the Techstream to the DLC3.

(b) Turn the engine switch on (IG).

(c) Turn the Techstream on.

(d) Enter the following menus: Body Electrical / AFS / Trouble Codes.

(e) Check for DTCs.

Body Electrical > AFS > Trouble Codes

OK:

DTC B2412, B2413, B2417 and B2418 are not output.

Result

Proceed to

OK

A

NG (DTC B2412 or B2417 is output)

B

NG (DTC B2413 or B2418 is output)

C
A

USE SIMULATION METHOD TO CHECK

B

REPLACE HEADLIGHT ASSEMBLY LH

C

REPLACE HEADLIGHT ASSEMBLY RH

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