Front Fog Light Circuit: Procedure

1. Select the item below in the ACTIVE TEST, use the Techstream to generate a control command, and then check that the fog light illuminates.
   BODY NO. 5 (FRONT CONTROLLER)
   
   

   Item	Test Details	Diagnostic Note
   Front Fog Light Relay	Front fog light relay ON / OFF	-

   OK

   Fog light illuminates.

NG → See step   2 

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

1. Remove the FR CTRL-AM fuse from the engine room No. 2 relay block.
2. Remove the FR FOG 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 fog light bulb with a new or normally functioning one.
2. Check that the bulb illuminates.

   OK

   Fog light bulb illuminates.

OK → END 

NG: Go to next step 

1. Disconnect the 2E junction block connector.
   Fig 1: Checking Wire Harness (Engine Room No. 2 Junction Block - Battery)

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

   Standard voltage

   Tester Connection	Specified Condition
   2E-1 - 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 fog light (front LH) and engine room No. 2 junction block, and the fog light (front LH) and body ground.
   Fig 2: Identifying Engine Room No. 2 Junction Block - Fog Light (Front LH) Connector Terminals

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
   1. Disconnect the 2G junction block connector.
   2. Disconnect the B12 fog light connector.
   3. Measure the resistance of the wire harness side connectors.

      Standard resistance

      Tester Connection	Specified Condition
      2G-7 - B12-2	Below 1 Ω
      2G-7 or B12-2 - Body ground	10 kΩ or higher
      B12-1 - Body ground	Below 1 Ω

2. Check the wire harness between the fog light (front RH) and engine room No. 2 junction block, and the fog light (front RH) and body ground.
   Fig 3: Identifying Fog Light (Front RH) And Engine Room No. 2 Junction Block Connector Terminals

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
   1. Disconnect the 2G junction block connector.
   2. Disconnect the B1 fog light connector.
   3. Measure the resistance of the wire harness side connectors.

      Standard resistance

      Tester Connection	Specified Condition
      2G-6 - B1-2	Below 1 Ω
      2G-6 or B1-2 - Body ground	10 kΩ or higher
      B1-1 - Body ground	Below 1 Ω

NG → REPAIR OR REPLACE HARNESS AND CONNECTOR 

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