LIGHTING SYSTEM High Beam Headlight Circuit

DESCRIPTION

The illumination of the high beam headlights is controlled by the headlight leveling ECU assembly.

WIRING DIAGRAM

1. for Triple Beam Headlight without Adaptive High Beam System:

   

2. for Single Beam Headlight:

   

CAUTION / NOTICE / HINT

PROCEDURE

1. CONFIRM MODEL

   
   

   1. Choose the model to be inspected.

      Result
      Result Proceed to for Triple Beam Headlight without Adaptive High Beam System A for Single Beam Headlight B

   
   

   B

   PERFORM ACTIVE TEST USING GTS (HEADLIGHT HI RELAY) Click here

   A

2. PERFORM ACTIVE TEST USING GTS (HEADLIGHT HI RELAY)

   
   

   1. Using the GTS, perform the Active Test.

      Click here

      
      Body Electrical > AFS > Active Test

      Tester Display	Measurement Item	Control Range	Diagnostic Note
      Headlight High Beam	Illuminates the high beam headlights	OFF or ON	-

      
      Body Electrical > AFS > Active Test

      Tester Display
      Headlight High Beam

      Result
      Result Proceed to The Active Test is performed normally A The Active Test is not performed normally for the left side light only B The Active Test is not performed normally for the right side light only C

   
   

   A

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

   C

   CHECK HEADLIGHT UNIT ASSEMBLY RH Click here

   B

3. CHECK HEADLIGHT UNIT ASSEMBLY LH

   
   

   1. Interchange the headlight unit assembly LH with RH and connect the connectors to them.

      Click here

   2. Check that the high beam light LH operate normally.

      Click here

      OK
      High beam light LH operate normally.

      Result
      Proceed to OK NG

   
   

   NG

   REPLACE HEADLIGHT ECU SUB-ASSEMBLY LH Click here

   OK

4. INSPECT HEADLIGHT ECU SUB-ASSEMBLY LH

   
   
   1. 

      *a	Component without harness connected (Headlight Unit LH)

      Remove the headlight unit LH.

      Click here

   2. Connect the No. 1 headlight ECU sub-assembly LH connectors.

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

      Standard Voltage
      Tester Connection Condition Specified Condition D-7 - D-8 High beam headlights illuminated 11 to 14 V

      Result
      Proceed to OK NG

   
   

   OK

   REPLACE HEADLIGHT UNIT LH Click here

   NG

   REPLACE HEADLIGHT UNIT ASSEMBLY LH Click here

5. CHECK HEADLIGHT UNIT ASSEMBLY RH

   
   

   1. Interchange the headlight unit assembly RH with LH and connect the connectors to them.

      Click here

   2. Check that the high beam light RH operate normally.

      Click here

      OK
      High beam light RH operate normally.

      Result
      Proceed to OK NG

   
   

   NG

   REPLACE HEADLIGHT ECU SUB-ASSEMBLY RH Click here

   OK

6. INSPECT HEADLIGHT ECU SUB-ASSEMBLY RH

   
   
   1. 

      *a	Component without harness connected (Headlight Unit RH)

      Remove the headlight unit RH.

      Click here

   2. Connect the No. 1 headlight ECU sub-assembly RH connectors.

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

      Standard Voltage
      Tester Connection Condition Specified Condition D-7 - D-8 High beam headlights illuminated 11 to 14 V

      Result
      Proceed to OK NG

   
   

   OK

   REPLACE HEADLIGHT UNIT RH Click here

   NG

   REPLACE HEADLIGHT UNIT ASSEMBLY RH Click here

7. PERFORM ACTIVE TEST USING GTS (HEADLIGHT HI RELAY)

   
   

   1. Using the GTS, perform the Active Test.

      Click here

      
      Body Electrical > HL AutoLeveling > Active Test

      Tester Display	Measurement Item	Control Range	Diagnostic Note
      Headlight High Beam	Illuminates the high beam headlights	OFF or ON	-

      
      Body Electrical > HL AutoLeveling > Active Test

      Tester Display
      Headlight High Beam

      Result
      Result Proceed to The Active Test is performed normally A The Active Test is not performed normally for the left side light only B The Active Test is not performed normally for the right side light only C

   
   

   A

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

   C

   CHECK HEADLIGHT UNIT ASSEMBLY RH Click here

   B

8. CHECK HEADLIGHT UNIT ASSEMBLY LH

   
   

   1. Interchange the headlight unit assembly LH with RH and connect the connectors to them.

      Click here

   2. Check that the high beam light LH operate normally.

      Click here

      OK
      High beam light LH operate normally.

      Result
      Proceed to OK NG

   
   

   NG

   REPLACE HEADLIGHT ECU SUB-ASSEMBLY LH Click here

   OK

9. INSPECT HEADLIGHT UNIT ASSEMBLY LH

   
   
   1. 

      *a	Component without harness connected (Headlight ECU Sub-assembly LH)
      *b	Component without harness connected (Headlight Unit LH)

      Remove the headlight unit LH.

      Click here

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

      Standard Resistance
      Tester Connection Condition Specified Condition B-10 - C-10 Always Below 1 Ω B-1 - C-4 Always Below 1 Ω

      Result
      Proceed to OK NG

   
   

   OK

   REPLACE HEADLIGHT UNIT LH Click here

   NG

   REPLACE HEADLIGHT UNIT ASSEMBLY LH Click here

10. CHECK HEADLIGHT UNIT ASSEMBLY RH

    
    

    1. Interchange the headlight unit assembly RH with LH and connect the connectors to them.

       Click here

    2. Check that the high beam light RH operate normally.

       Click here

       OK
       High beam light RH operate normally.

       Result
       Proceed to OK NG

    
    

    NG

    REPLACE HEADLIGHT ECU SUB-ASSEMBLY RH Click here

    OK

11. INSPECT HEADLIGHT UNIT ASSEMBLY RH

    
    
    1. 

       *a	Component without harness connected (Headlight ECU Sub-assembly RH)
       *b	Component without harness connected (Headlight Unit RH)

       Remove the headlight unit RH.

       Click here

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

       Standard Resistance
       Tester Connection Condition Specified Condition B-10 - C-10 Always Below 1 Ω B-1 - C-4 Always Below 1 Ω

       Result
       Proceed to OK NG

    
    

    OK

    REPLACE HEADLIGHT UNIT RH Click here

    NG

    REPLACE HEADLIGHT UNIT ASSEMBLY RH Click here