B2410 Malfunction of headlight swivel ECU LH Open or short in headlight swivel ECU LH circuit

DESCRIPTION

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

DTC No.	DTC Detecting Condition	Trouble Area
B2410	Malfunction of headlight swivel ECU LH Open or short in headlight swivel ECU LH circuit	Headlight swivel ECU LH Harness or connector AFS ECU
B2411	Malfunction of headlight swivel ECU RH Open or short in headlight swivel ECU RH circuit	Headlight swivel ECU RH Harness or connector AFS ECU

WIRING DIAGRAM

INSPECTION PROCEDURE

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

1. Disconnect the AFS ECU connector and headlight connector on the headlight swivel ECU side.

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

   Resistance:

   LH Side (B2410):

   Tester connection	Condition	Specified condition
   A18-25 (SBLL) - H7-1	Always	Below 1 Ω
   A18-26 (SBGL) - H7-3	Always	Below 1 Ω
   A18-28 (IGSL) - H7-2	Always	Below 1 Ω
   A18-27 (ESL) - H7-4	Always	Below 1 Ω
   A18-25 - Body ground	Always	10 kΩ or higher
   A18-26 - Body ground	Always	10 kΩ or higher
   A18-28 - Body ground	Always	10 kΩ or higher

   RH Side (B2411):

   Tester connection	Condition	Specified condition
   A18-9 (SBLR) - H10-1	Always	Below 1 Ω
   A18-10 (SBGR) - H10-3	Always	Below 1 Ω
   A18-12 (IGSR) - H10-2	Always	Below 1 Ω
   A18-11 (ESR) - H10-4	Always	Below 1 Ω
   A18-9 - Body ground	Always	10 kΩ or higher
   A18-10 - Body ground	Always	10 kΩ or higher
   A18-12 - Body ground	Always	10 kΩ or higher

3. Disconnect the headlight connector on the headlight swivel ECU side and the headlight swivel ECU connector.

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

   Resistance:

   LH Side (B2410):

   Tester connection	Condition	Specified condition
   H7-1 - H7-a-1 (BUS LINE)	Always	Below 1 Ω
   H7-2 - H7-a-5 (IG)	Always	Below 1 Ω
   H7-3 - H7-a-7 (BUS GND)	Always	Below 1 Ω
   H7-4 - H7-a-10 (P GND)	Always	Below 1 Ω

   RH Side (B2411):

   Tester connection	Condition	Specified condition
   H10-1 - H10-a-1 (BUS LINE)	Always	Below 1 Ω
   H10-2 - H10-a-5 (IG)	Always	Below 1 Ω
   H10-3 - H10-a-7 (BUS GND)	Always	Below 1 Ω
   H10-4 - H10-a-10 (P GND)	Always	Below 1 Ω

NG	REPAIR OR REPLACE HARNESS OR CONNECTOR

OK

2. CHECK HARNESS AND CONNECTOR (AFS ECU GROUND CIRCUIT)

1. Disconnect the AFS ECU connector.

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

   Resistance:

   Tester connection	Condition	Specified condition
   A17-1 (E1) - Body ground	Always	Below 1 Ω
   A17-11 (E1S) - Body ground	Always	Below 1 Ω

NG	REPAIR OR REPLACE HARNESS OR CONNECTOR

OK

3. INSPECT HEADLIGHT SWIVEL ECU

1. Disconnect the headlight swivel ECU connector.

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

   Voltage:

   LH Side (B2410):

   Tester connection	Condition	Specified condition
   IG (H7-a-5) - P GND (H7-a-10)	Ignition switch OFF → ON	Below 1 V → 10 to 14 V

   RH Side (B2411):

   Tester connection	Condition	Specified condition
   IG (H10-a-5) - P GND (H10-a-10)	Ignition switch OFF → ON	Below 1 V → 10 to 14 V

   Result:

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

B	Go to step 4
C	PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE

A
REPLACE AFS ECU

4. REPLACE HEADLIGHT SWIVEL ECU

OK:

Returns to normal operation.

NG	REPLACE AFS ECU

OK
END