LIGHTING SYSTEM Clearance Light/Daytime Running Light Circuit

DESCRIPTION

Clearance light function:

• The clearance lights operate when the main body ECU (multiplex network body ECU) receives a light control switch position signal and sends an illumination command signal to the headlight ECU sub-assembly LH to illuminate the clearance/daytime running light LEDs.

Daytime running light function:

• The daytime running lights operate when the daytime running light operation conditions are met and the main body ECU (multiplex network body ECU) sends an illumination command signal to the headlight ECU sub-assembly LH so that the clearance/daytime running light LEDs illuminate at the daytime running light brightness level (a brightness level higher than the clearance lights).

WIRING DIAGRAM

CAUTION / NOTICE / HINT

PROCEDURE

1. PERFORM ACTIVE TEST USING GTS

   
   

   1. Connect the GTS to the DLC3.

   2. Turn the engine switch on (IG).

   3. Turn the GTS on.

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

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

      AFS

      Tester Display	Test Part	Control Range	Diagnostic Note
      Clearance Light	Clearance lights	ON/OFF	-
      Daytime Running Light	Daytime running lights	ON/OFF	-

      OK
      Clearance lights and daytime running lights illuminate.

      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 ASSEMBLY RH Click here

   B

2. INSPECT HEADLIGHT UNIT ASSEMBLY LH

   
   

   1. Remove the headlight assembly LH Click here.

   2. Remove the headlight unit assembly LH from the headlight assembly LH Click here.

   3. 

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

      Standard Resistance
      Tester Connection Condition Specified Condition C-1 - Q-1 Always Below 1 Ω C-6 - Q-2 Always Below 1 Ω B-16 - Q-3 Always Below 1 Ω

   
   

   NG

   REPLACE HEADLIGHT UNIT ASSEMBLY LH Click here

   OK

3. INSPECT HEADLIGHT UNIT ASSEMBLY LH

   
   

   1. Remove the headlight assembly LH Click here.

   2. Remove the headlight unit assembly LH from the headlight assembly LH Click here.

   3. 

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

      Standard Resistance
      Tester Connection Condition Specified Condition Q-2 - R-1 Always Below 1 Ω Q-7 - R-2 Always Below 1 Ω

   
   

   NG

   REPLACE HEADLIGHT UNIT ASSEMBLY LH Click here

   OK

4. CHECK NO. 1 HEADLIGHT CLEARANCE LED UNIT LH

   
   

   1. Replace the No. 1 headlight clearance LED unit LH with a new or known good one Click here.

   2. Connect the GTS to the DLC3.

   3. Turn the engine switch on (IG).

   4. Turn the GTS on.

   5. Enter the following menus: Body Electrical / AFS / Active Test.

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

      AFS

      Tester Display	Test Part	Control Range	Diagnostic Note
      Clearance Light	Clearance lights	ON/OFF	-
      Daytime Running Light	Daytime running lights	ON/OFF	-

      OK
      Clearance lights and daytime running lights illuminate.

   
   

   NG

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

   OK

5. CHECK HEADLIGHT ECU SUB-ASSEMBLY LH

   
   

   1. Replace the headlight ECU sub-assembly LH with a new or known good one Click here.

   2. Connect the GTS to the DLC3.

   3. Turn the engine switch on (IG).

   4. Turn the GTS on.

   5. Enter the following menus: Body Electrical / AFS / Active Test.

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

      AFS

      Tester Display	Test Part	Control Range	Diagnostic Note
      Clearance Light	Clearance lights	ON/OFF	-
      Daytime Running Light	Daytime running lights	ON/OFF	-

      OK
      Clearance lights and daytime running lights illuminate.

   
   

   OK

   END (HEADLIGHT ECU SUB-ASSEMBLY LH WAS DEFECTIVE)

   NG

   REPLACE HEADLIGHT UNIT ASSEMBLY LH Click here

6. INSPECT HEADLIGHT UNIT ASSEMBLY RH

   
   

   1. Remove the headlight assembly RH Click here.

   2. Remove the headlight unit assembly RH from the headlight assembly RH Click here.

   3. 

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

      Standard Resistance
      Tester Connection Condition Specified Condition C-1 - Q-1 Always Below 1 Ω C-6 - Q-2 Always Below 1 Ω B-16 - Q-3 Always Below 1 Ω

   
   

   NG

   REPLACE HEADLIGHT UNIT ASSEMBLY RH Click here

   OK

7. INSPECT HEADLIGHT UNIT ASSEMBLY RH

   
   

   1. Remove the headlight assembly RH Click here.

   2. Remove the headlight unit assembly RH from the headlight assembly RH Click here.

   3. 

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

      Standard Resistance
      Tester Connection Condition Specified Condition Q-2 - R-1 Always Below 1 Ω Q-7 - R-2 Always Below 1 Ω

   
   

   NG

   REPLACE HEADLIGHT UNIT ASSEMBLY RH Click here

   OK

8. CHECK NO. 1 HEADLIGHT CLEARANCE LED UNIT RH

   
   

   1. Replace the No. 1 headlight clearance LED unit RH with a new or known good one Click here.

   2. Connect the GTS to the DLC3.

   3. Turn the engine switch on (IG).

   4. Turn the GTS on.

   5. Enter the following menus: Body Electrical / AFS / Active Test.

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

      AFS

      Tester Display	Test Part	Control Range	Diagnostic Note
      Clearance Light	Clearance lights	ON/OFF	-
      Daytime Running Light	Daytime running lights	ON/OFF	-

      OK
      Clearance lights and daytime running lights illuminate.

   
   

   NG

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

   OK

9. CHECK HEADLIGHT ECU SUB-ASSEMBLY RH

   
   

   1. Replace the headlight ECU sub-assembly RH with a new or known good one Click here.

   2. Connect the GTS to the DLC3.

   3. Turn the engine switch on (IG).

   4. Turn the GTS on.

   5. Enter the following menus: Body Electrical / AFS / Active Test.

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

      AFS

      Tester Display	Test Part	Control Range	Diagnostic Note
      Clearance Light	Clearance lights	ON/OFF	-
      Daytime Running Light	Daytime running lights	ON/OFF	-

      OK
      Clearance lights and daytime running lights illuminate.

   
   

   OK

   END (HEADLIGHT ECU SUB-ASSEMBLY RH WAS DEFECTIVE)

   NG

   REPLACE HEADLIGHT UNIT ASSEMBLY RH Click here