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Home >> Toyota >> 2012 >> Highlander Limited, AWD >> Repair and Diagnosis >> Accessories & Equipment >> Interior/Illumination Lights >> Lighting System (Diagnostic Codes & Circuit Tests) (Except Hybrid) >> Lighting System >> Circuit Tests >> Daytime Running Light Relay Circuit >> Procedure

Daytime Running Light Relay Circuit: Procedure

  1. CHECK HEADLIGHT 
    1. Check the operation of high beam headlights.

      OK

      High beam headlights operate normally.

    NG → See step   3 

    OK: Go to next step 

  2. REPLACE ENGINE ROOM JUNCTION BLOCK ASSEMBLY 
    1. Replace the engine room junction block assembly with a new or known good one.
    2. Check the operation of daytime running lights.

      OK

      Daytime running lights operate normally.

    NG → See step   4 

    OK → END (ENGINE ROOM JUNCTION BLOCK WAS DEFECTIVE) 

  3. GO TO PROBLEM SYMPTOMS TABLE. Refer to  PROBLEM SYMPTOMS TABLE 
  4. PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE. Refer to  PROBLEM SYMPTOMS TABLE