B2412 Malfunction of headlight swivel motor LH Open or short in headlight swivel motor LH circuit

DESCRIPTION

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

DTC No.	DTC Detecting Condition	Trouble Area
B2412	Malfunction of headlight swivel motor LH Open or short in headlight swivel motor LH circuit	Headlight swivel motor LH Headlight swivel ECU LH Harness or connector AFS ECU
B2413	Malfunction of headlight swivel motor RH Open or short in headlight swivel motor RH circuit	Headlight swivel motor RH Headlight swivel ECU RH Harness or connector AFS ECU

WIRING DIAGRAM

INSPECTION PROCEDURE

1. CHECK HARNESS AND CONNECTOR (HEADLIGHT SWIVEL ECU - HEADLIGHT SWIVEL MOTOR)

1. Disconnect the headlight swivel ECU connector and headlight swivel motor connector.

2. Measure the resistance according to the value(s) in the table below.
   

   Resistance:

   LH Side (B2412):

   Tester connection	Condition	Specified condition
   U (H7-a-2) - U-OUT (H7-b-3)	Always	Below 1 Ω
   W (H7-a-3) - W-OUT (H7-b-5)	Always	Below 1 Ω
   GND (H7-a-4) - GND (H7-b-2)	Always	Below 1 Ω
   MOTOR V (H7-a-6) - MOTOR-V (H7-b-7)	Always	Below 1 Ω
   V (H7-a-8) - V-OUT (H7-b-4)	Always	Below 1 Ω
   5V (H7-a-9) - 5V (H7-b-1)	Always	Below 1 Ω
   MOTOR U (H7-a-11) - MOTOR-U (H7-b-6)	Always	Below 1 Ω
   MOTOR W (H7-a-12) - MOTOR-W (H7-b-8)	Always	Below 1 Ω

   RH Side (B2413):

   Tester connection	Condition	Specified condition
   U (H10-a-2) - U-OUT (H10-b-3)	Always	Below 1 Ω
   W (H10-a-3) - W-OUT (H10-b-5)	Always	Below 1 Ω
   GND (H10-a-4) - GND (H10-b-2)	Always	Below 1 Ω
   MOTOR V (H10-a-6) - MOTOR- V (H10-b-7)	Always	Below 1 Ω
   V (H10-a-8) - V-OUT (H10-b-4)	Always	Below 1 Ω
   5V (H10-a-9) - 5V (H10-b-1)	Always	Below 1 Ω
   MOTOR U (H10-a-11) - MOTOR-U (H10-b-6)	Always	Below 1 Ω
   MOTOR W (H10-a-12) - MOTOR-W (H10-b-8)	Always	Below 1 Ω

NG	REPAIR OR REPLACE HARNESS OR CONNECTOR

OK

2. INSPECT HEADLIGHT SWIVEL MOTOR

1. Disconnect the headlight swivel motor connector.

2. Measure the resistance according to the value(s) in the table below.
   

   Resistance:

   LH Side (B2412):

   Tester connection	Condition	Specified condition
   MOTOR-U (H7-b-6) - MOTOR-V (H7-b-7)	Always	8.5 to 10.5 Ω
   MOTOR-V (H7-b-7) - MOTOR-W (H7-b-8)	Always	8.5 to 10.5 Ω
   MOTOR-W (H7-b-8) - MOTOR-U (H7-b-6)	Always	8.5 to 10.5 Ω

   RH Side (B2413):

   Tester connection	Condition	Specified condition
   MOTOR-U (H10-b-6) - MOTOR-V (H10-b-7)	Always	8.5 to 10.5 Ω
   MOTOR-V (H10-b-7) - MOTOR-W (H10-b-8)	Always	8.5 to 10.5 Ω
   MOTOR-W (H10-b-8) - MOTOR-U (H10-b-6)	Always	8.5 to 10.5 Ω

NG	REPLACE HEADLIGHT SWIVEL MOTOR

OK

3. INSPECT HEADLIGHT SWIVEL ECU

1. Disconnect the headlight swivel motor connector.

2. Measure the voltage according to the value(s) in the table below.
   

   Voltage:

   LH Side (B2412):

   Tester connection	Condition	Specified condition
   5V (H7-b-1) - GND (H7-b-2)	Ignition switch OFF → ON	Below 1 V → 4.5 to 5.5 V

   RH Side (B2413):

   Tester connection	Condition	Specified condition
   5V (H10-b-1) - GND (H10-b-2)	Ignition switch OFF → ON	Below 1 V → 4.5 to 5.5 V

   Result:

   Condition	Proceed to
   OK	A
   NG (When checking from the PROBLEM SYMPTOMS TABLE)	B
   NG (When checking from the DTC)	C

B	PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE
C	REPLACE HEADLIGHT SWIVEL ECU

A

4. REPLACE HEADLIGHT SWIVEL MOTOR

OK:

Returns to normal operation.

NG	Go to step 5

OK
END

5. REPLACE HEADLIGHT SWIVEL ECU

OK:

Returns to normal operation.

NG	REPLACE AFS ECU

OK
END