AUTOMATIC HEADLIGHT BEAM LEVEL CONTROL SYSTEM Headlight Beam Level Control Actuator Circuit

DESCRIPTION

The No. 1 headlight ECU sub-assemblies operate the headlight leveling motors according to the vehicle conditions.

WIRING DIAGRAM

CAUTION / NOTICE / HINT

PROCEDURE

1. PERFORM ACTIVE TEST USING GTS

   
   

   1. Connect the GTS to the DLC3.

   2. Turn the power switch on (READY).

   3. Turn the GTS on.

   4. Enter the following menus: Body Electrical / HL AutoLeveling / Active Test.

   5. Perform the Active Test according to the display on the GTS.

      
      Body Electrical > HL AutoLeveling > Active Test

      Tester Display	Measurement Item	Control Range	Diagnostic Note
      Drive The Leveling Motor	Headlight leveling motor upward or downward operation	Stop, Down or Up	Perform the Active Test with the power switch is on (READY) and vehicle stopped.

      
      Body Electrical > HL AutoLeveling > Active Test

      Tester Display
      Drive The Leveling Motor

      OK
      Headlight leveling motors operate normally.

      Result
      Result Proceed to OK A NG (for LH Side) B NG (for RH Side) C

   
   

   A

   PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE Click here

   C

   INSPECT HEADLIGHT UNIT RH Click here

   B

2. INSPECT HEADLIGHT UNIT LH

   
   

   1. Remove the headlight unit LH.

      for Bulb Type Turn Signal Light: Click here

      for LED Type Turn Signal Light: Click here

   2. Remove the headlight unit assembly LH.

      for Bulb Type Turn Signal Light: Click here

      for LED Type Turn Signal Light: Click here

   3. Inspect the headlight unit LH.

      for Bulb Type Turn Signal Light: Click here

      for LED Type Turn Signal Light: Click here

      Result
      Proceed to OK NG

   
   

   NG

   REPLACE HEADLIGHT UNIT LH for Bulb Type Turn Signal Light: Click here REPLACE HEADLIGHT UNIT LH for LED Type Turn Signal Light: Click here

   OK

3. REPLACE HEADLIGHT LEVELING MOTOR LH

   
   

   1. Replace the headlight leveling motor LH with a new or known good one.

      for Bulb Type Turn Signal Light: Click here

      for LED Type Turn Signal Light: Click here

      Result
      Proceed to NEXT

   
   

   NEXT

4. PERFORM ACTIVE TEST USING GTS

   
   

   1. Connect the GTS to the DLC3.

   2. Turn the power switch on (READY).

   3. Turn the GTS on.

   4. Enter the following menus: Body Electrical / HL AutoLeveling / Active Test.

   5. Perform the Active Test according to the display on the GTS.

      
      Body Electrical > HL AutoLeveling > Active Test

      Tester Display	Measurement Item	Control Range	Diagnostic Note
      Drive The Leveling Motor	Headlight leveling motor upward or downward operation	Stop, Down or Up	Perform the Active Test with the power switch is on (READY) and vehicle stopped.

      
      Body Electrical > HL AutoLeveling > Active Test

      Tester Display
      Drive The Leveling Motor

      OK
      Headlight leveling motors operate normally.

      Result
      Proceed to OK NG

   
   

   OK

   END (HEADLIGHT LEVELING MOTOR LH WAS DEFECTIVE)

   NG

   REPLACE NO. 1 HEADLIGHT ECU SUB-ASSEMBLY LH Click here

5. INSPECT HEADLIGHT UNIT RH

   
   

   1. Remove the headlight unit RH.

      for Bulb Type Turn Signal Light: Click here

      for LED Type Turn Signal Light: Click here

   2. Remove the headlight unit assembly RH.

      for Bulb Type Turn Signal Light: Click here

      for LED Type Turn Signal Light: Click here

   3. Inspect the headlight unit RH.

      for Bulb Type Turn Signal Light: Click here

      for LED Type Turn Signal Light: Click here

      Result
      Proceed to OK NG

   
   

   NG

   REPLACE HEADLIGHT UNIT RH for Bulb Type Turn Signal Light: Click here REPLACE HEADLIGHT UNIT RH for LED Type Turn Signal Light: Click here

   OK

6. REPLACE HEADLIGHT LEVELING MOTOR RH

   
   

   1. Replace the headlight leveling motor RH with a new or known good one.

      for Bulb Type Turn Signal Light: Click here

      for LED Type Turn Signal Light: Click here

      Result
      Proceed to NEXT

   
   

   NEXT

7. PERFORM ACTIVE TEST USING GTS

   
   

   1. Connect the GTS to the DLC3.

   2. Turn the power switch on (READY).

   3. Turn the GTS on.

   4. Enter the following menus: Body Electrical / HL AutoLeveling / Active Test.

   5. Perform the Active Test according to the display on the GTS.

      
      Body Electrical > HL AutoLeveling > Active Test

      Tester Display	Measurement Item	Control Range	Diagnostic Note
      Drive The Leveling Motor	Headlight leveling motor upward or downward operation	Stop, Down or Up	Perform the Active Test with the power switch is on (READY) and vehicle stopped.

      
      Body Electrical > HL AutoLeveling > Active Test

      Tester Display
      Drive The Leveling Motor

      OK
      Headlight leveling motors operate normally.

      Result
      Proceed to OK NG

   
   

   OK

   END (HEADLIGHT LEVELING MOTOR RH WAS DEFECTIVE)

   NG

   REPLACE NO. 1 HEADLIGHT ECU SUB-ASSEMBLY RH Click here