LIGHTING SYSTEM DRL Relay Circuit

DESCRIPTION

The main body ECU controls the daytime running lights.

INSPECTION PROCEDURE

PROCEDURE

1. Click here

   PERFORM ACTIVE TEST USING INTELLIGENT TESTER (DRL RELAY)

   
   

   1. Using the intelligent tester, perform the Active Test (Click here).

      Table 1. Main Body

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

      OK
      DRL relay operates (daytime running lights illuminate).

   
   
   • OKClick here
   • NGClick here
2. Click here

   INSPECT DRL RELAY

   
   
   1. 

      Remove the DRL relay from the No. 4 relay block.

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

      Standard Resistance
      Tester Connection Condition Specified Condition 3 - 5 Battery voltage not applied between terminals 1 and 2 10 kΩ or higher 3 - 5 Battery voltage applied between terminals 1 and 2 Below 1 Ω

   
   
   • OKClick here
   • NGClick here
3. Click here

   CHECK HARNESS AND CONNECTOR (BATTERY - DRL RELAY)

   
   
   1. 

      Remove the DRL relay from the No. 4 relay block.

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

      Standard Voltage
      Tester Connection Condition Specified Condition DRL relay terminal 1 - Body ground Always 11 to 14 V DRL relay terminal 5 - Body ground Always 11 to 14 V

      Table 2. Text in Illustration

      *1	No. 4 Relay Block
      *2	DRL Relay

   
   
   • OKClick here
   • NGClick here
4. Click here

   CHECK HARNESS AND CONNECTOR (DRL RELAY - MAIN BODY ECU)

   
   
   1. 

      Remove the DRL relay from the No. 4 relay block.

      Table 3. Text in Illustration

      *1	Front view of wire harness connector (to Main Body ECU)	*2	No. 4 Relay Block
      *3	for LHD	*4	for RHD
      *5	DRL Relay	-	-

   2. Disconnect the H79*1 or H81*2 main body ECU connector.

      
      

      • *1: for LHD

      • *2: for RHD

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

      Standard Resistance
      Table 4. for LHD: Tester Connection Condition Specified Condition DRL relay terminal 2 - H79-3 (DRLE) Always Below 1 Ω H79-3 (DRLE) - Body ground Always 10 kΩ or higher
      Table 5. for RHD: Tester Connection Condition Specified Condition DRL relay terminal 2 - H81-14 (DRLE) Always Below 1 Ω H81-14 (DRLE) - Body ground Always 10 kΩ or higher

   
   
   • OKClick here
   • NGClick here
5. Click here

   REPLACE MAIN BODY ECU (INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY)

6. Click here

   REPLACE DRL RELAY

7. Click here

   REPAIR OR REPLACE HARNESS OR CONNECTOR

8. Click here

   REPAIR OR REPLACE HARNESS OR CONNECTOR

9. Click here

   PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLEClick here