LIGHTING SYSTEM(w/ Automatic Headlight Beam Level Control System) Clearance Light/Daytime Running Light Circuit

DESCRIPTION

Clearance light function:

• When the main body ECU (multiplex network body ECU) receives the light control switch position signal, it sends an illumination request signal to the headlight ECU sub-assembly LH/RH and illuminates the clearance lights.

Daytime running light function:

• When the operation conditions of the daytime running lights are met, the main body ECU (multiplex network body ECU) sends an illumination request signal to the headlight ECU sub-assembly LH/RH and illuminates the daytime running lights.

WIRING DIAGRAM

1. for Bulb Type Turn Signal Light

   

2. for LED Type Turn Signal Light

   

CAUTION / NOTICE / HINT

PROCEDURE

1. CHECK LIGHTS

   
   

   1. Check the illumination of each clearance lights and daytime running lights.

      Result
      Result Proceed to LH side clearance light and daytime running light does not illuminate A RH side clearance light and daytime running light does not illuminate B

   
   

   B

   PERFORM ACTIVE TEST USING GTS Click here

   A

2. PERFORM ACTIVE TEST USING GTS

   
   

   1. Connect the GTS to the DLC3.

   2. Turn the ignition switch to ON.

   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
      Clearance Light	Clearance lights	OFF or ON	-
      Daytime Running Light	Daytime running lights	OFF or ON	-

      
      Body Electrical > HL AutoLeveling > Active Test

      Tester Display
      Clearance Light

      
      Body Electrical > HL AutoLeveling > Active Test

      Tester Display
      Daytime Running Light

      OK
      Clearance lights and daytime running lights illuminate.

      Result
      Proceed to OK NG

   
   

   OK

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

   NG

3. CHECK HEADLIGHT UNIT ASSEMBLY LH

   
   

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

      for Bulb Type Turn Signal Light: Click here

      for LED Type Turn Signal Light: Click here

      Result
      Proceed to NEXT

   
   

   NEXT

4. CHECK OPERATION (CLEARANCE LIGHTS AND DAYTIME RUNNING LIGHTS)

   
   

   1. Check the operation of the clearance lights and daytime running lights.

      OK
      The clearance lights and daytime running lights operate normally.

      Result
      Proceed to OK NG

   
   

   OK

   REPLACE HEADLIGHT ECU SUB-ASSEMBLY LH Click here

   NG

5. CONFIRM MODEL

   
   

   1. Choose the model to be inspected.

      Result
      Result Proceed to for Bulb Type Turn Signal Light A for LED Type Turn Signal Light B

   
   

   B

   INSPECT HEADLIGHT UNIT ASSEMBLY LH Click here

   A

6. INSPECT HEADLIGHT UNIT ASSEMBLY LH

   

   *a

   Component without harness connected (to Headlight ECU Sub-assembly LH)

   *b

   Component without harness connected (to No. 1 Headlight Clearance LED Unit LH)

   
   

   1. Remove the headlight assembly LH.

      Click here

   2. Remove the No. 1 headlight clearance LED unit LH.

      Click here

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

      Standard Resistance
      Tester Connection Condition Specified Condition B-20 (DRL+) - G-1 Always Below 1 Ω B-11 (DRL-) - G-3 Always Below 1 Ω B-19 (CLL+) - G-2 Always Below 1 Ω G-4 - H-5 Always Below 1 Ω G-5 - H-4 Always Below 1 Ω G-6 - H-3 Always Below 1 Ω G-7 - H-1 Always Below 1 Ω

      Result
      Proceed to OK NG

   
   

   OK

   REPLACE NO. 1 HEADLIGHT CLEARANCE LED UNIT LH Click here

   NG

   REPLACE HEADLIGHT UNIT ASSEMBLY LH Click here

7. INSPECT HEADLIGHT UNIT ASSEMBLY LH

   

   *a

   Component without harness connected (to Headlight ECU Sub-assembly LH)

   *b

   Component without harness connected (to Headlight Lens LH)

   
   

   1. Remove the headlight assembly LH.

      Click here

   2. Remove the headlight lens LH.

      Click here

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

      Standard Resistance
      Tester Connection Condition Specified Condition B-20 (DRL+) - E-7 Always Below 1 Ω B-11 (DRL-) - E-8 Always Below 1 Ω B-16 (PWM1) - E-6 Always Below 1 Ω

      Result
      Proceed to OK NG

   
   

   OK

   REPLACE HEADLIGHT LENS LH Click here

   NG

   REPLACE HEADLIGHT UNIT ASSEMBLY LH Click here

8. PERFORM ACTIVE TEST USING GTS

   
   

   1. Connect the GTS to the DLC3.

   2. Turn the ignition switch to ON.

   3. Turn the GTS on.

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

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

      
      Body Electrical > HL AutoLeveling (Sub) > Active Test

      Tester Display	Measurement Item	Control Range	Diagnostic Note
      Clearance Light	Clearance lights	OFF or ON	-
      Daytime Running Light	Daytime running lights	OFF or ON	-

      
      Body Electrical > HL AutoLeveling (Sub) > Active Test

      Tester Display
      Clearance Light

      
      Body Electrical > HL AutoLeveling (Sub) > Active Test

      Tester Display
      Daytime Running Light

      OK
      Clearance lights and daytime running lights illuminate.

      Result
      Proceed to OK NG

   
   

   OK

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

   NG

9. CHECK HEADLIGHT UNIT ASSEMBLY RH

   
   

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

      for Bulb Type Turn Signal Light: Click here

      for LED Type Turn Signal Light: Click here

      Result
      Proceed to NEXT

   
   

   NEXT

10. CHECK OPERATION (CLEARANCE LIGHTS AND DAYTIME RUNNING LIGHTS)

    
    

    1. Check the operation of the clearance lights and daytime running lights.

       OK
       The clearance lights and daytime running lights operate normally.

       Result
       Proceed to OK NG

    
    

    OK

    REPLACE HEADLIGHT ECU SUB-ASSEMBLY RH Click here

    NG

11. CONFIRM MODEL

    
    

    1. Choose the model to be inspected.

       Result
       Result Proceed to for Bulb Type Turn Signal Light A for LED Type Turn Signal Light B

    
    

    B

    INSPECT HEADLIGHT UNIT ASSEMBLY RH Click here

    A

12. INSPECT HEADLIGHT UNIT ASSEMBLY RH

    

    *a

    Component without harness connected (to Headlight ECU Sub-assembly RH)

    *b

    Component without harness connected (to No. 1 Headlight Clearance LED Unit RH)

    
    

    1. Remove the headlight assembly RH.

       Click here

    2. Remove the No. 1 headlight clearance LED unit RH.

       Click here

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

       Standard Resistance
       Tester Connection Condition Specified Condition B-20 (DRL+) - G-1 Always Below 1 Ω B-11 (DRL-) - G-3 Always Below 1 Ω B-19 (CLL+) - G-2 Always Below 1 Ω G-4 - H-5 Always Below 1 Ω G-5 - H-4 Always Below 1 Ω G-6 - H-3 Always Below 1 Ω G-7 - H-1 Always Below 1 Ω

       Result
       Proceed to OK NG

    
    

    OK

    REPLACE NO. 1 HEADLIGHT CLEARANCE LED UNIT RH Click here

    NG

    REPLACE HEADLIGHT UNIT ASSEMBLY RH Click here

13. INSPECT HEADLIGHT UNIT ASSEMBLY RH

    

    *a

    Component without harness connected (to Headlight ECU Sub-assembly RH)

    *b

    Component without harness connected (to Headlight Lens RH)

    
    

    1. Remove the headlight assembly RH.

       Click here

    2. Remove the headlight lens RH.

       Click here

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

       Standard Resistance
       Tester Connection Condition Specified Condition B-20 (DRL+) - E-7 Always Below 1 Ω B-11 (DRL-) - E-8 Always Below 1 Ω B-16 (PWM1) - E-6 Always Below 1 Ω

       Result
       Proceed to OK NG

    
    

    OK

    REPLACE HEADLIGHT LENS RH Click here

    NG

    REPLACE HEADLIGHT UNIT ASSEMBLY RH Click here