Dtc B2424 Headlight Leveling Motor Lh Communication Malfunction

Vehicle Exterior. Land Cruiser. Urj200, 202 Grj200 Vdj200
Lighting (Ext). Land Cruiser. Urj200, 202 Grj200 Vdj200

DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

CHECK FOR DTC

CHECK HARNESS AND CONNECTOR (HEADLIGHT SWIVEL ECU ASSEMBLY - BATTERY AND BODY GROUND)

CHECK HARNESS AND CONNECTOR (HEADLIGHT SWIVEL ECU ASSEMBLY - HEADLIGHT UNIT ASSEMBLY)

INSPECT HEADLIGHT UNIT ASSEMBLY

CHECK HEADLIGHT LEVELING MOTOR

DTC B2424 Headlight Leveling Motor LH Communication Malfunction

DTC B2425 Headlight Leveling Motor RH Communication Malfunction


DESCRIPTION

The headlight leveling motor operates by receiving the signal from the headlight swivel ECU. The headlight swivel ECU detects the headlight leveling motor status using the signal from the headlight leveling motor.

DTC Code
DTC Detection Condition
Trouble Area
B2424
  1. Malfunction in the headlight leveling motor LH.
  2. Open or short in the headlight leveling motor LH communication circuit.
  1. Headlight swivel ECU assembly
  2. Headlight unit assembly LH
  3. Headlight leveling motor LH
  4. Harness or connector
B2425
  1. Malfunction in the headlight leveling motor RH.
  2. Open or short in the headlight leveling motor RH communication circuit.
  1. Headlight swivel ECU assembly
  2. Headlight unit assembly RH
  3. Headlight leveling motor RH
  4. Harness or connector

WIRING DIAGRAM


Land Cruiser. Urj200, 202 Grj200 Vdj200.Lighting (Ext).Lighting System. Dtc B2424 Headlight Leveling Motor Lh Communication Malfunction


INSPECTION PROCEDURE

NOTICE:
  1. Inspect the fuses for circuits related to this system before performing the following inspection procedure.
  2. After replacing the headlight swivel ECU, initialization of the ECU is necessary (except w/ Dynamic Headlight Auto Leveling) (Click here).
1.CHECK FOR DTC

  1. Clear the DTCs (Click here).

  1. Check for DTCs (Click here).

    OK:
    DTC B2424 or B2425 output does not occur.


NG
Go to step 2
OK

USE SIMULATION METHOD TO CHECK (Click here)

2.CHECK HARNESS AND CONNECTOR (HEADLIGHT SWIVEL ECU ASSEMBLY - BATTERY AND BODY GROUND)


    Land Cruiser. Urj200, 202 Grj200 Vdj200.Lighting (Ext).Lighting System. Dtc B2424 Headlight Leveling Motor Lh Communication Malfunction

  1. Disconnect the headlight swivel ECU connector.

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

    Standard Voltage:
    Tester Connection
    		Switch Condition
    		Specified Condition
    E101-15 (IG) - Body ground
    		Ignition switch ON
    		11 to 14 V

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

    Standard Resistance:
    Tester Connection
    		Condition
    		Specified Condition
    E101-22 (E1) - Body ground
    		Always
    		Below 1 Ω
Text in Illustration
*a
Front view of wire harness connector
(to Headlight Swivel ECU Assembly)


NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK


3.CHECK HARNESS AND CONNECTOR (HEADLIGHT SWIVEL ECU ASSEMBLY - HEADLIGHT UNIT ASSEMBLY)

  1. Disconnect the E101 headlight swivel ECU connector.

  1. Disconnect the A54*1 or A58*2 headlight unit connector.

    1. *1: for LH
    2. *2: for RH

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

    Standard Resistance:
    for LH:
    Tester Connection
    		Condition
    		Specified Condition
    E101-3 (LHT) - A54-8 (LHIG)
    		Always
    		Below 1 Ω
    E101-30 (LH+) - A54-3 (LH T)
    		Always
    		Below 1 Ω
    E101-27 (LH-) - A54-4 (LH E)
    		Always
    		Below 1 Ω
    E101-3 (LHT) - Body ground
    		Always
    		10 kΩ or higher
    E101-30 (LH+) - Body ground
    		Always
    		10 kΩ or higher
    E101-27 (LH-) - Body ground
    		Always
    		10 kΩ or higher
    for RH:
    Tester Connection
    		Condition
    		Specified Condition
    E101-4 (RHT) - A58-8 (RHIG)
    		Always
    		Below 1 Ω
    E101-11 (RH+) - A58-3 (RH T)
    		Always
    		Below 1 Ω
    E101-28 (RH-) - A58-4 (RH E)
    		Always
    		Below 1 Ω
    E101-4 (RHT) - Body ground
    		Always
    		10 kΩ or higher
    E101-11 (RH+) - Body ground
    		Always
    		10 kΩ or higher
    E101-28 (RH-) - Body ground
    		Always
    		10 kΩ or higher


NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK


4.INSPECT HEADLIGHT UNIT ASSEMBLY


  1. Remove the headlight unit (Click here).


    Land Cruiser. Urj200, 202 Grj200 Vdj200.Lighting (Ext).Lighting System. Dtc B2424 Headlight Leveling Motor Lh Communication Malfunction


    Text in Illustration
    *a
    		Component without harness connected
    (Headlight Unit Assembly LH)
    		*b
    		Component without harness connected
    (Headlight Unit Assembly RH)
    *c
    		Front view of wire harness connector
    (to Headlight Leveling Motor LH)
    		*d
    		Front view of wire harness connector
    (to Headlight Leveling Motor RH)

  1. Disconnect the headlight leveling motor connector.

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

    Standard Resistance:
    for LH:
    Tester Connection
    		Condition
    		Specified Condition
    8 (LHIG) - 3
    		Always
    		Below 1 Ω
    3 (LH T) - 2
    4 (LH E) - 1
    for RH:
    Tester Connection
    		Condition
    		Specified Condition
    8 (RHIG) - 3
    		Always
    		Below 1 Ω
    3 (RH T) - 2
    4 (RH E) - 1


NG
REPLACE HEADLIGHT UNIT ASSEMBLY (Click here)
OK


5.CHECK HEADLIGHT LEVELING MOTOR

  1. Temporarily replace the headlight leveling motor with a new or normally functioning one (Click here).

  1. Check for DTCs (Click here).

    OK:
    DTC B2424 or B2425 output does not occur.
    Result
    Result
    		Proceed to
    OK
    		A
    NG (for LHD)
    		B
    NG (for RHD)
    		C


B
REPLACE HEADLIGHT SWIVEL ECU ASSEMBLY (Click here)

C
REPLACE HEADLIGHT SWIVEL ECU ASSEMBLY (Click here)
A

END (HEADLIGHT LEVELING MOTOR WAS DEFECTIVE)