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

DESCRIPTION

The headlight light control ECU sub-assembly LH and RH operates the headlight leveling motors according to the vehicle conditions.

PROCEDURE

1. Click here

   PERFORM ACTIVE TEST USING GTS

   
   

   1. Connect the GTS to the DLC3.

   2. Start the engine.

   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.

      
      
      1. Body Electrical > HL AutoLeveling > Active Test

         Tester Display	Measurement Item	Control Range	Diagnostic Note
         Drive The Leveling Motor	Leveling motor upward or downward operation	Stop/Down/Up	Perform the Active Test with the engine started and vehicle stopped

      2. 
         
         10. 
             
      
      
      1. Body Electrical > HL AutoLeveling > Active Test

         Tester Display
         Drive The Leveling Motor

      2. 
         
         1. 
            
      3. 
         
         11. 
             

      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 TABLEClick here

   • BClick here
   • CClick here
2. Click here

   INSPECT HEADLIGHT HOUSING ASSEMBLY LH

   
   

   1. Remove the headlight assembly LH.

      Click here

   2. Remove the headlight light control ECU sub-assembly LH.

      Click here

   3. Disconnect the headlight leveling motor LH connector.

   4. 

      *a

      Component without harness connected (Headlight Housing Assembly LH)

      -

      -

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

      Standard Resistance
      Tester Connection Condition Specified Condition LVL-1 - F-17 Always Below 1 Ω LVL-2 - F-8 Always Below 1 Ω LVL-3 - F-20 Always Below 1 Ω

      Result
      Proceed to OK NG

   
   
   • OKClick here
   • NG

     REPLACE HEADLIGHT UNIT LHClick here

3. Click here

   REPLACE HEADLIGHT LEVELING MOTOR LH

   
   

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

      Click here

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

      
      
      1. Body Electrical > HL AutoLeveling > Active Test

         Tester Display	Measurement Item	Control Range	Diagnostic Note
         Drive The Leveling Motor	Leveling motor upward or downward operation	Stop/Down/Up	Perform the Active Test with the engine started and vehicle stopped

      2. 
         
         10. 
             
      
      
      1. Body Electrical > HL AutoLeveling > Active Test

         Tester Display
         Drive The Leveling Motor

      2. 
         
         1. 
            
      3. 
         
         11. 
             

      OK
      Headlight leveling motor LH operate normally.

      Result
      Proceed to OK NG

   
   
   • OK

     END (HEADLIGHT LEVELING MOTOR LH WAS DEFECTIVE)

   • NG

     REPLACE HEADLIGHT LIGHT CONTROL ECU SUB-ASSEMBLY LHClick here

4. Click here

   INSPECT HEADLIGHT HOUSING ASSEMBLY RH

   
   

   1. Remove the headlight assembly RH.

      Click here

   2. Remove the headlight light control ECU sub-assembly RH.

      Click here

   3. Disconnect the headlight leveling motor RH connector.

   4. 

      *a

      Component without harness connected (Headlight Housing Assembly RH)

      -

      -

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

      Standard Resistance
      Tester Connection Condition Specified Condition LVL-1 - F-17 Always Below 1 Ω LVL-2 - F-8 Always Below 1 Ω LVL-3 - F-20 Always Below 1 Ω

      Result
      Proceed to OK NG

   
   
   • OKClick here
   • NG

     REPLACE HEADLIGHT UNIT RHClick here

5. Click here

   REPLACE HEADLIGHT LEVELING MOTOR RH

   
   

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

      Click here

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

      
      
      1. Body Electrical > HL AutoLeveling > Active Test

         Tester Display	Measurement Item	Control Range	Diagnostic Note
         Drive The Leveling Motor	Leveling motor upward or downward operation	Stop/Down/Up	Perform the Active Test with the engine started and vehicle stopped

      2. 
         
         10. 
             
      
      
      1. Body Electrical > HL AutoLeveling > Active Test

         Tester Display
         Drive The Leveling Motor

      2. 
         
         1. 
            
      3. 
         
         11. 
             

      OK
      Headlight leveling motor RH operate normally.

      Result
      Proceed to OK NG

   
   
   • OK

     END (HEADLIGHT LEVELING MOTOR RH WAS DEFECTIVE)

   • NG

     REPLACE HEADLIGHT LIGHT CONTROL ECU SUB-ASSEMBLY RHClick here