LIGHTING 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 No. 1 headlight ECU sub-assembly LH 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 LH and illuminates the daytime running lights.

WIRING DIAGRAM

CAUTION / NOTICE / HINT

PROCEDURE

1. PERFORM ACTIVE TEST USING GTS

   
   

   1. Connect the GTS to the DLC3.

   2. Turn the power switch on (IG).

   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
      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

   CHECK HARNESS AND CONNECTOR (CLEARANCE LIGHT ASSEMBLY RH - AUXILIARY BATTERY) Click here

   B

2. CHECK HARNESS AND CONNECTOR (CLEARANCE LIGHT ASSEMBLY LH - AUXILIARY BATTERY)

   
   

   1. Disconnect the A35 clearance light assembly LH connector.

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

      Standard Voltage
      Tester Connection Condition Specified Condition A35-1 (DRL) - Body ground Light control switch in tail or head position 11 to 14 V

      Result
      Proceed to OK NG

   
   

   NG

   REPAIR OR REPLACE HARNESS OR CONNECTOR

   OK

3. CHECK HARNESS AND CONNECTOR (CLEARANCE LIGHT ASSEMBLY LH - BODY GROUND)

   
   

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

      Standard Resistance
      Tester Connection Condition Specified Condition A35-3 (E) - Body ground Always Below 1 Ω

      Result
      Proceed to OK NG

   
   

   NG

   REPAIR OR REPLACE HARNESS OR CONNECTOR

   OK

4. CHECK HARNESS AND CONNECTOR (CLEARANCE LIGHT ASSEMBLY LH - NO. 1 HEADLIGHT ECU SUB-ASSEMBLY LH)

   
   

   1. Disconnect the W1 No. 1 headlight ECU sub-assembly LH connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition A35-2 (DRLC) - W1-8 (RLD2) Always Below 1 Ω A35-2 (DRLC) or W1-8 (RLD2) - Body ground Always 10 kΩ or higher

      Result
      Proceed to OK NG

   
   

   NG

   REPAIR OR REPLACE HARNESS OR CONNECTOR

   OK

5. INSPECT CLEARANCE LIGHT LED UNIT ASSEMBLY LH

   
   

   1. Remove the clearance light assembly LH.

      Click here

   2. Remove the clearance light LED unit assembly LH.

      Click here

   3. Inspect the clearance light LED unit assembly LH.

      Click here

      Result
      Proceed to OK NG

   
   

   OK

   REPLACE CLEARANCE LIGHT ASSEMBLY LH Click here

   NG

   REPLACE CLEARANCE LIGHT LED UNIT ASSEMBLY LH Click here

6. CHECK HARNESS AND CONNECTOR (CLEARANCE LIGHT ASSEMBLY RH - AUXILIARY BATTERY)

   
   

   1. Disconnect the A3 clearance light assembly RH connector.

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

      Standard Voltage
      Tester Connection Condition Specified Condition A3-1 (DRL) - Body ground Light control switch in tail or head position 11 to 14 V

      Result
      Proceed to OK NG

   
   

   NG

   REPAIR OR REPLACE HARNESS OR CONNECTOR

   OK

7. CHECK HARNESS AND CONNECTOR (CLEARANCE LIGHT ASSEMBLY RH - BODY GROUND)

   
   

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

      Standard Resistance
      Tester Connection Condition Specified Condition A3-3 (E) - Body ground Always Below 1 Ω

      Result
      Proceed to OK NG

   
   

   NG

   REPAIR OR REPLACE HARNESS OR CONNECTOR

   OK

8. CHECK HARNESS AND CONNECTOR (CLEARANCE LIGHT ASSEMBLY RH - NO. 1 HEADLIGHT ECU SUB-ASSEMBLY RH)

   
   

   1. Disconnect the G1 No. 1 headlight ECU sub-assembly RH connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition A3-2 (DRLC) - G1-8 (RLD2) Always Below 1 Ω A3-2 (DRLC) or G1-8 (RLD2) - Body ground Always 10 kΩ or higher

      Result
      Proceed to OK NG

   
   

   NG

   REPAIR OR REPLACE HARNESS OR CONNECTOR

   OK

9. INSPECT CLEARANCE LIGHT LED UNIT ASSEMBLY RH

   
   

   1. Remove the clearance light assembly RH.

      Click here

   2. Remove the clearance light LED unit assembly RH.

      Click here

   3. Inspect the clearance light LED unit assembly RH.

      Click here

      Result
      Proceed to OK NG

   
   

   OK

   REPLACE CLEARANCE LIGHT ASSEMBLY RH Click here

   NG

   REPLACE CLEARANCE LIGHT LED UNIT ASSEMBLY RH Click here