LIGHTING SYSTEM, Diagnostic DTC:B2424, B2425

DESCRIPTION

The AFS ECU (headlight swivel ECU assembly) receives a signal from each headlight swivel motor using LIN communication.

WIRING DIAGRAM

1. 

   w/ AFS

2. 

   w/o AFS

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 is not output.

   
   
   • OKClick here
   • NGClick here
2. Click here

   CHECK HARNESS AND CONNECTOR (BATTERY - AFS ECU)

   
   

   1. Disconnect the A53 AFS ECU (headlight swivel ECU assembly) connector.

   2. w/ AFS

      
      

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

         Standard Voltage
         Tester Connection Condition Specified Condition A53-14 (IGS) - Body ground Engine switch on (IG) 11 to 14 V

   3. w/o AFS

      
      

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

         Standard Voltage
         Tester Connection Condition Specified Condition A53-15 (IG) - Body ground Engine switch on (IG) 11 to 14 V

   
   
   • OKClick here
   • NGClick here
3. Click here

   CHECK HARNESS AND CONNECTOR (AFS ECU - BODY GROUND)

   
   

   1. Disconnect the A53 AFS ECU (headlight swivel ECU assembly) connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition A53-22 (E1) - Body ground Always Below 1 Ω

   
   
   • OKClick here
   • NGClick here
4. Click here

   CHECK HARNESS AND CONNECTOR (AFS ECU - HEADLIGHT ASSEMBLY)

   
   

   1. Disconnect the A53 AFS ECU (headlight swivel ECU assembly) connector.

   2. Disconnect the A71 headlight assembly LH connector or A73 headlight assembly RH connector.

   3. w/ AFS

      
      

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

         Standard Resistance
         Table 1. LH Side (B2424) Tester Connection Condition Specified Condition A53-1 (SMBL) - A71-3 (SMBL) Always Below 1 Ω A53-23 (SMGL) - A71-1 (LH E) Always Below 1 Ω A53-30 (LH+) - A71-6 (LHM+) Always Below 1 Ω A53-1 (SMBL) - Body ground Always 10 kΩ or higher A53-23 (SMGL) - Body ground Always 10 kΩ or higher A53-30 (LH+) - Body ground Always 10 kΩ or higher
         Table 2. RH Side (B2425) Tester Connection Condition Specified Condition A53-2 (SMBR) - A73-3 (SMBR) Always Below 1 Ω A53-24 (SMGR) - A73-1 (RH E) Always Below 1 Ω A53-11 (RH+) - A73-6 (RHM+) Always Below 1 Ω A53-2 (SMBR) - Body ground Always 10 kΩ or higher A53-24 (SMGR) - Body ground Always 10 kΩ or higher A53-11 (RH+) - Body ground Always 10 kΩ or higher

   4. w/o AFS

      
      

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

         Standard Resistance
         Table 3. LH Side (B2424) Tester Connection Condition Specified Condition A53-3 (LHT) - A71-2 (LHB1) Always Below 1 Ω A53-23 (SMGL) - A71-1 (LH E) Always Below 1 Ω A53-30 (LH+) - A71-6 (LHM+) Always Below 1 Ω A53-3 (LHT) - Body ground Always 10 kΩ or higher A53-23 (SMGL) - Body ground Always 10 kΩ or higher A53-30 (LH+) - Body ground Always 10 kΩ or higher
         Table 4. RH Side (B2425) Tester Connection Condition Specified Condition A53-4 (RHT) - A73-2 (RHB1) Always Below 1 Ω A53-24 (SMGR) - A73-1 (RH E) Always Below 1 Ω A53-11 (RH+) - A73-6 (RHM+) Always Below 1 Ω A53-4 (RHT) - Body ground Always 10 kΩ or higher A53-24 (SMGR) - Body ground Always 10 kΩ or higher A53-11 (RH+) - Body ground Always 10 kΩ or higher

   
   
   • OKClick here
   • NGClick here
5. Click here

   INSPECT AFS ECU (HEADLIGHT SWIVEL ECU ASSEMBLY)

   
   

   1. Reconnect the A53 AFS ECU (headlight swivel ECU assembly) connector.

   2. 

      w/ AFS

      
      

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

         Standard Voltage
         Table 5. LH Side (B2424) Tester Connection Condition Specified Condition A53-1 (SMBL) - A53-23 (SMGL) Engine switch off Below 1 V Engine switch on (IG) 11 to 14 V
         Table 6. RH Side (B2425) Tester Connection Condition Specified Condition A53-2 (SMBR) - A53-24 (SMGR) Engine switch off Below 1 V Engine switch on (IG) 11 to 14 V

         Table 7. Text in Illustration

         *1	Component with harness connected (AFS ECU (Headlight Swivel ECU Assembly))

   3. 

      w/o AFS

      
      

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

         Standard Voltage
         Table 8. LH Side (B2424) Tester Connection Condition Specified Condition A53-3 (LHT) - A53-23 (SMGL) Engine switch off Below 1 V Engine switch on (IG) 11 to 14 V
         Table 9. RH Side (B2425) Tester Connection Condition Specified Condition A53-4 (RHT) - A53-24 (SMGR) Engine switch off Below 1 V Engine switch on (IG) 11 to 14 V

         Table 10. Text in Illustration

         *1	Component with harness connected (AFS ECU (Headlight Swivel ECU Assembly))

   
   
   • OKClick here
   • NGClick here
6. Click here

   CHECK HEADLIGHT UNIT (HEADLIGHT SWIVEL MOTOR)

   
   

   1. Replace the headlight unit (headlight swivel motor) with a new or normally functioning one (Click here).

   2. Check for DTCs (Click here).

      OK
      DTC B2424 or B2425 is not output.

   
   
   • OKClick here
   • NGClick here
7. Click here

   USE SIMULATION METHOD TO CHECKClick here

8. Click here

   REPAIR OR REPLACE HARNESS OR CONNECTOR

9. Click here

   REPAIR OR REPLACE HARNESS OR CONNECTOR

10. Click here

    REPAIR OR REPLACE HARNESS OR CONNECTOR

11. Click here

    REPLACE AFS ECU (HEADLIGHT SWIVEL ECU ASSEMBLY)Click here

12. Click here

    END (HEADLIGHT SWIVEL MOTOR WAS DEFECTIVE)