LIGHTING SYSTEM Clearance Light/Daytime Running Light Circuit

DESCRIPTION

Clearance light function:

• When the steering sensor receives the light control switch position signal, it sends an illumination request signal to the No. 1 headlight ECU sub-assembly 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 No. 1 headlight ECU sub-assembly and illuminates the daytime running lights.

WIRING DIAGRAM

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 lights and daytime running lights illuminate. A RH side clearance lights and daytime running lights illuminate. B

   
   

   B

   PERFORM ACTIVE TEST USING GTS Click here

   A

2. PERFORM ACTIVE TEST USING GTS

   
   

   1. Using the GTS, perform the Active Test.

      Click here

      
      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
      Procced 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 to them.

      Click here

   2. Check that the clearance light LH and daytime running light LH operate normally.

      Click here

      OK
      Clearance light LH and daytime running light LH operate normally.

      Result
      Proceed to OK NG

   
   

   NG

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

   OK

4. CHECK HEADLIGHT UNIT ASSEMBLY LH

   
   

   1. Remove the headlight unit assembly LH.

      Click here

      

      *a	Component without harness connected (No. 1 Headlight Clearance LED Unit LH)	*b	Component without harness connected (LED ECU LH)
      *c	Component without harness connected (No. 1 Headlight ECU Sub-assembly LH)	-	-

   2. Disconnect the LED ECU LH connector.

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

      Click here

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

      Standard Resistance
      Tester Connection Condition Specified Condition B-10 (DRL/CLL+) - C-5 Always Below 1 Ω B-1 (DRL/CLL-) - C-1 Always Below 1 Ω B-16 (PWM1) - C-8 Always Below 1 Ω C-3 - D-1 Always Below 1 Ω C-7 - D-2 Always Below 1 Ω

      Result
      Proceed to OK NG

   
   

   NG

   REPLACE HEADLIGHT UNIT ASSEMBLY LH Click here

   OK

5. CHECK NO. 1 HEADLIGHT CLEARANCE LED UNIT LH

   
   

   1. Remove the No. 1 headlight clearance LED unit LH with new one.

      Click here

   2. Using the GTS, perform the Active Test.

      Click here

      
      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
      Procced to OK NG

   
   

   OK

   END (NO. 1 HEADLIGHT CLEARANCE LED UNIT LH WAS DEFECTIVE)

   NG

   REPLACE HEADLIGHT UNIT ASSEMBLY LH Click here

6. PERFORM ACTIVE TEST USING GTS

   
   

   1. Using the GTS, perform the Active Test.

      Click here

      
      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
      Procced to OK NG

   
   

   OK

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

   NG

7. 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 clearance light RH and daytime running light RH operate normally.

      Click here

      OK
      Clearance light RH and daytime running light RH operate normally.

      Result
      Proceed to OK NG

   
   

   NG

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

   OK

8. CHECK HEADLIGHT UNIT ASSEMBLY RH

   
   

   1. Remove the headlight unit assembly RH.

      Click here

      

      *a	Component without harness connected (No. 1 Headlight Clearance LED Unit RH)	*b	Component without harness connected (LED ECU RH)
      *c	Component without harness connected (No. 1 Headlight ECU Sub-assembly RH)	-	-

   2. Disconnect the LED ECU RH connector.

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

      Click here

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

      Standard Resistance
      Tester Connection Condition Specified Condition B-10 (DRL/CLL+) - C-5 Always Below 1 Ω B-1 (DRL/CLL-) - C-1 Always Below 1 Ω B-16 (PWM1) - C-8 Always Below 1 Ω C-3 - D-1 Always Below 1 Ω C-7 - D-2 Always Below 1 Ω

      Result
      Proceed to OK NG

   
   

   NG

   REPLACE HEADLIGHT UNIT ASSEMBLY RH Click here

   OK

9. CHECK NO. 1 HEADLIGHT CLEARANCE LED UNIT RH

   
   

   1. Remove the No. 1 headlight clearance LED unit RH with new one.

      Click here

   2. Using the GTS, perform the Active Test.

      Click here

      
      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
      Procced to OK NG

   
   

   OK

   END (NO. 1 HEADLIGHT CLEARANCE LED UNIT RH WAS DEFECTIVE)

   NG

   REPLACE HEADLIGHT UNIT ASSEMBLY RH Click here