Lighting. Dtc B2412 Headlight Swivel Motor Lh Malfunction

Body Electrical. Lexus Gs430, Gs300. Uzs190 Grs190

Lighting. Lexus Gs430, Gs300. Uzs190 Grs190

DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

PERFORM ACTIVE TEST USING INTELLIGENT TESTER

INSPECT HEADLIGHT ASSEMBLY

CHECK WIRE HARNESS (HEADLIGHT ASSEMBLY - AFS ECU)

CHECK AFS ECU

REPLACE HEADLIGHT ASSEMBLY

DTC B2412 Headlight Swivel Motor LH Malfunction

DTC B2413 Headlight Swivel Motor RH Malfunction

DESCRIPTION

The swivel actuator receives the signal from the AFS ECU to operate and sends the signal regarding the direction of the headlight and condition of the headlight swivel motor to the AFS ECU.

DTC No.	DTC Detection Condition	Trouble Area
B2412	Malfunction in headlight swivel actuator LH Open or short in headlight swivel actuator LH circuit Open or short in headlight beam level control actuator (LH)	Headlight beam level control actuator (LH) Wire harness or connector AFS ECU
B2413	Malfunction in headlight swivel actuator RH Open or short in headlight swivel actuator RH circuit Open or short in headlight beam level control actuator (RH)	Headlight beam level control actuator (RH) Wire harness or connector AFS ECU

WIRING DIAGRAM

Lexus Gs430, Gs300. Uzs190 Grs190.Lighting.Lighting System.
Dtc
B2412 Headlight Swivel Motor Lh Malfunction

INSPECTION PROCEDURE

1.PERFORM ACTIVE TEST USING INTELLIGENT TESTER

Connect the intelligent tester to the DLC3.

Turn the engine switch on (IG) and turn the intelligent tester main switch on.

Select the item below in the Active Test and then check that the motor operates.

AFS ECU:

Item
Test Details
Diagnostic Note
Drive Swivel Motor RH
Drive the swivel motor RIGHT / OFF
-
Drive Swivel Motor LH
Drive the swivel motor LEFT / OFF
-
OK:
Swivel actuator operates.

Result
OK (When checking from PROBLEM SYMPTOMS TABLE)
A
OK (When checking from DIAGNOSTIC TROUBLE CODE CHART)
B
NG
C

Result
OK (When checking from PROBLEM SYMPTOMS TABLE)	A
OK (When checking from DIAGNOSTIC TROUBLE CODE CHART)	B
NG	C

REPLACE AFS ECU

Go to step 2

PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE

2.INSPECT HEADLIGHT ASSEMBLY

Disconnect the B11 and B2 headlight assembly connectors.

Measure the resistance of the connectors.

Standard resistance:

LH side (B2412)
Tester Connection
Condition
Specified Condition
B11-23(BL1-) - B11-24(BL1+)
Always
6 to 8 Ω
B11-21(BL2-) - B11-22(BL2+)
Always
6 to 8 Ω

RH side (B2413)
Tester Connection
Condition
Specified Condition
B2-23(BR1-) - B2-24(BR1+)
Always
6 to 8 Ω
B2-21(BR2-) - B2-22(BR2+)
Always
6 to 8 Ω
HINT:
Measure the resistance after the headlight has cooled.

REPLACE HEADLIGHT ASSEMBLY

OK

3.CHECK WIRE HARNESS (HEADLIGHT ASSEMBLY - AFS ECU)

Disconnect the A30 AFS ECU.

Disconnect the B11 and B2 headlight connectors.

Measure the resistance of the wire harness side connectors.

Standard resistance:

LH side (B2412)
Tester Connection	Condition	Specified Condition
A30-25(BL1+) - B11-24(BL1+)	Always	Below 1 Ω
A30-26(BL1-) - B11-23(BL1-)	Always	Below 1 Ω
A30-27(BL2+) - B11-22(BL2+)	Always	Below 1 Ω
A30-28(BL2-) - B11-21(BL2-)	Always	Below 1 Ω
A30-19(SMGL) - B11-19(SMGL)	Always	Below 1 Ω
A30-24(SML) - B11-24(SML)	Always	Below 1 Ω
A30-22(SMBL) - B11-22(SMBL)	Always	Below 1 Ω
A30-25(BL1+) - Body ground	Always	10 kΩ or higher
A30-26(BL1-) - Body ground	Always	10 kΩ or higher
A30-27(BL2+) - Body ground	Always	10 kΩ or higher
A30-28(BL2-) - Body ground	Always	10 kΩ or higher
A30-19(SMGL) - Body ground	Always	10 kΩ or higher
A30-24(SML) - Body ground	Always	10 kΩ or higher
A30-22(SMBL) - Body ground	Always	10 kΩ or higher

RH side (B2413)
Tester Connection	Condition	Specified Condition
A30-9(BR1+) - B2-24(BR1+)	Always	Below 1 Ω
A30-10(BR1-) - B2-23(BR1-)	Always	Below 1 Ω
A30-11(BR2+) - B2-22(BR2+)	Always	Below 1 Ω
A30-12(BR2-) - B2-21(BR2-)	Always	Below 1 Ω
A30-18(SMGR) - B2-19(SMGR)	Always	Below 1 Ω
A30-21(SMBR) - B2-20(SMBR)	Always	Below 1 Ω
A30-23(SMR) - B2-18(SMR)	Always	Below 1 Ω
A30-9(BR1+) - Body ground	Always	10 kΩ or higher
A30-10(BR1-) - Body ground	Always	10 kΩ or higher
A30-11(BR2+) - Body ground	Always	10 kΩ or higher
A30-12(BR2-) - Body ground	Always	10 kΩ or higher
A30-18(SMGR) - Body ground	Always	10 kΩ or higher
A30-21(SMBR) - Body ground	Always	10 kΩ or higher
A30-23(SMR) - Body ground	Always	10 kΩ or higher

REPAIR OR REPLACE HARNESS AND CONNECTOR

OK

4.CHECK AFS ECU

Disconnect the B11 and B2 headlight connectors.

Measure the voltage of the wire harness side connectors.

Standard voltage:

LH side (B2412)
Tester Connection
Condition
Specified Condition
B11-5 - B11 -6
Engine switch off
Below 1 V
Engine switch on (IG)
4.5 to 5.5 V

RH side (B2413)
Tester Connection
Condition
Specified Condition
B2-5 - B2-6
Engine switch off
Below 1 V
Engine switch on (IG)
4.5 to 5.5 V

Result:
OK
A
NG (When checking from PROBLEM SYMPTOMS TABLE)
B
NG (When checking from DIAGNOSTIC TROUBLE CODE CHART)
C

Result:
OK	A
NG (When checking from PROBLEM SYMPTOMS TABLE)	B
NG (When checking from DIAGNOSTIC TROUBLE CODE CHART)	C

PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE

REPLACE AFS ECU

A

5.REPLACE HEADLIGHT ASSEMBLY

Temporarily replace the headlight assembly with a new or normally functioning one.

Check that headlight assembly operates.
OK:
Return to normal operation.

REPLACE AFS ECU

END

Item	Test Details	Diagnostic Note
Drive Swivel Motor RH	Drive the swivel motor RIGHT / OFF	-
Drive Swivel Motor LH	Drive the swivel motor LEFT / OFF	-

LH side (B2412)
Tester Connection	Condition	Specified Condition
B11-5 - B11 -6	Engine switch off	Below 1 V
B11-5 - B11 -6	Engine switch on (IG)	4.5 to 5.5 V

RH side (B2413)
Tester Connection	Condition	Specified Condition
B2-5 - B2-6	Engine switch off	Below 1 V
B2-5 - B2-6	Engine switch on (IG)	4.5 to 5.5 V