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Home › Toyota › 2002 › 4Runner Base › Repair and Diagnosis › Body & Frame › Body, Cab Control Systems › Body Control Systems - Diagnostics › Circuit Inspection › Horn Circuit › Inspection Procedure

Inspection Procedure

  1. Check horn. 
    1. NG Replace horn. 
    2. OK Go to next step 
  2. Check horn switch. 
    1. NG Replace horn switch. 
    2. OK Go to next step 
  3. CHECK HARNESS AND CONNECTOR BETWEEN HORN AND BODY ECU, AND BODY ECU AND HORN SWITCH  . 
    1. NG Repair or replace harness or connector. 
    2. OK Check and replace driver side J/B. 
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