LIGHTING SYSTEM, Diagnostic DTC:B2424, B2425

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.

INSPECTION PROCEDURE

PROCEDURE

1. Click here

   CHECK FOR DTC

   
   

   1. Clear the DTCs (Click here).

   2. Check for DTCs (Click here).

      OK
      DTC B2424 or B2425 output does not occur.

   
   
   • OKClick here
   • NGClick here
2. Click here

   USE SIMULATION METHOD TO CHECKClick here

3. Click here

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

   
   
   1. 

      Disconnect the headlight swivel ECU connector.

   2. 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

   3. 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

      Table 1. Text in Illustration

      *a	Front view of wire harness connector (to Headlight Swivel ECU Assembly)

   
   
   • OKClick here
   • NGClick here
4. Click here

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

   
   

   1. Disconnect the E101 headlight swivel ECU connector.

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

      
      

      • *1: for LH

      • *2: for RH

   3. 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

   
   
   • OKClick here
   • NGClick here
5. Click here

   INSPECT HEADLIGHT UNIT ASSEMBLY

   
   
   1. 

      Remove the headlight unit (Click here).

      Table 2. 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)

   2. Disconnect the headlight leveling motor connector.

   3. 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

   
   
   • OKClick here
   • NGClick here
6. Click here

   CHECK HEADLIGHT LEVELING MOTOR

   
   

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

   2. Check for DTCs (Click here).

      OK
      DTC B2424 or B2425 output does not occur.

      Table 3. Result

      Result	Proceed to
      OK	A
      NG (for LHD)	B
      NG (for RHD)	C

   
   
   • AClick here
   • BClick here
   • CClick here
7. Click here

   END (HEADLIGHT LEVELING MOTOR WAS DEFECTIVE)

8. Click here

   REPLACE HEADLIGHT SWIVEL ECU ASSEMBLYClick here

9. Click here

   REPAIR OR REPLACE HARNESS OR CONNECTOR

10. Click here

    REPLACE HEADLIGHT UNIT ASSEMBLYClick here

11. Click here

    REPLACE HEADLIGHT SWIVEL ECU ASSEMBLYClick here