Headlight (HI-BEAM) Circuit: Procedure

1. Select the ACTIVE TEST, use the Techstream to generate a control command, and then check that the headlight assembly illuminates.
   BODY NO. 5 (FRONT CONTROLLER)
   
   

   Item	Test Details	Diagnostic Note
   Light Head (High)	Headlight (High) ON / OFF	-

   OK

   Headlight assembly illuminates.

NG → See step   2 

OK → PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE 

1. Remove the FR CTRL-B fuse from the engine room No. 2 relay block.
2. Remove the H-LP UPR fuse from the engine room No. 2 junction block.
3. Measure the resistance of the fuses.

   Standard resistance

   Below 1 Ω

NG → REPLACE FUSE 

OK: Go to next step 

1. Temporarily replace the headlight No. 1 bulb with a new or normally functioning one.
2. Check that the bulb illuminates.

   OK

   Headlight No. 1 bulb illuminates.

OK → END 

NG: Go to next step 

1. Disconnect the 2E junction block connector.
   Fig 1: Identifying 2E Junction Block Connector

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Measure the voltage of the wire harness side connector.

   Standard voltage

   Tester Connection	Specified Condition
   2E-2 - Body ground	10 to 14 V

NG → REPAIR OR REPLACE HARNESS AND CONNECTOR 

OK: Go to next step 

1. Check the wire harness between the headlight (LH) and engine room No. 2 junction block, and headlight (LH) and body ground.
   Fig 2: Checking Wire Harness (Engine Room No. 2 Junction Block - Body Ground)

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
   1. Disconnect the 2G junction block connector.
   2. Disconnect the B11 headlight (LH) connector.
   3. Measure the resistance of the wire harness side connectors.

      Standard resistance

      Tester Connection	Specified Condition
      2G-13 - B11-2 (HI)	Below 1 Ω
      2G-13 or B11-2 (HI) - Body ground	10 kΩ or higher
      B11-1 (E) - Body ground	Below 1 Ω

2. Check the wire harness between the headlight (RH) and engine room No. 2 junction block, and headlight (RH) and body ground.
   Fig 3: Checking Wire Harness Between Headlight (RH) And Engine Room No. 2 Junction Block, And Headlight (RH) And Body Ground

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
   1. Disconnect the 2G junction block connector.
   2. Disconnect the B2 headlight (RH) connector.
   3. Measure the resistance of the wire harness side connectors.

      Standard resistance

      Tester Connection	Specified Condition
      2G-12 - B2-2 (HI)	Below 1 Ω
      2G-12 or B2-2 (HI) - Body ground	10 kΩ or higher
      B2-1 (E) - Body ground	Below 1 Ω

NG → REPAIR OR REPLACE HARNESS AND CONNECTOR 

OK → PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE