DTC    B2410    Headlight Swivel ECU LH Communication Malfunction

DTC    B2411    Headlight Swivel ECU RH Communication Malfunction

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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
  1. Malfunction of headlight swivel ECU LH
  2. Open or short in headlight swivel ECU LH circuit
  1. Headlight swivel ECU LH
  2. Harness or connector
  3. AFS ECU
B2411
  1. Malfunction of headlight swivel ECU RH
  2. Open or short in headlight swivel ECU RH circuit
  1. Headlight swivel ECU RH
  2. Harness or connector
  3. AFS ECU

WIRING DIAGRAM


B110586E02


INSPECTION PROCEDURE

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


    B110639E03

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

  1. 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



    B110640E02

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

  1. 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)


    B110641E03

  1. Disconnect the AFS ECU connector.

  1. 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


    B110642E02

  1. Disconnect the headlight swivel ECU connector.

  1. 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