LIGHTING SYSTEM Daytime Running Light Relay Circuit

DESCRIPTION

The main body ECU (multiplex network body ECU) controls the daytime running lights.

The system illuminates the high-intensity LED clearance lights (high-intensity circuit).

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 / Main Body / Active Test.

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

      Main Body

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

      OK
      Daytime running lights illuminate. (LED clearance lights illuminate on high-intensity (bright) setting.)

   
   

   OK

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

   NG

2. INSPECT DRL RELAY

   
   

   1. Inspect the DRL relay.

      Click here

   
   

   NG

   REPLACE DRL RELAY

   OK

3. CHECK HARNESS AND CONNECTOR (POWER SOURCE - DRL RELAY)

   
   

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

      Standard Voltage
      Tester Connection Condition Specified Condition 1 (DRL relay) - Body ground Power switch off 11 to 14 V 3 (DRL relay) - Body ground Power switch off 11 to 14 V

   
   

   NG

   REPAIR OR REPLACE HARNESS OR CONNECTOR

   OK

4. CHECK HARNESS AND CONNECTOR (DRL RELAY - HEADLIGHT ASSEMBLY LH AND HEADLIGHT ASSEMBLY RH)

   
   

   1. Disconnect the A9*1 or A73*2 headlight assembly LH connector.

   2. Disconnect the A38*1 or A75*2 headlight assembly RH connector.

      
      

      • *1: for Halogen Headlight

      • *2: for LED Headlight

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

      Standard Resistance
      for Halogen Headlight Tester Connection Condition Specified Condition 5 (DRL relay) - A9-1 (B) Always Below 1 Ω 5 (DRL relay) - A38-1 (B) Always Below 1 Ω 5 (DRL relay) or A9-1 (B) - Body ground Always 10 kΩ or higher 5 (DRL relay) or A38-1 (B) - Body ground Always 10 kΩ or higher
      for LED Headlight Tester Connection Condition Specified Condition 5 (DRL relay) - A73-7 (B) Always Below 1 Ω 5 (DRL relay) - A75-7 (B) Always Below 1 Ω 5 (DRL relay) or A73-7 (B) - Body ground Always 10 kΩ or higher 5 (DRL relay) or A75-7 (B) - Body ground Always 10 kΩ or higher

   
   

   NG

   REPAIR OR REPLACE HARNESS OR CONNECTOR

   OK

5. CHECK HARNESS AND CONNECTOR (DRL RELAY - MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU))

   
   

   1. Disconnect the H16 main body ECU (multiplex network body ECU) connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition 2 (DRL relay) - H16-15 (DRL) Always Below 1 Ω 2 (DRL relay) or H16-15 (DRL) - Body ground Always 10 kΩ or higher

   
   

   OK

   REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) Click here

   NG

   REPAIR OR REPLACE HARNESS OR CONNECTOR