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Home >> Chevrolet >> 2020 >> Malibu LS >> Repair and Diagnosis >> External Pages >> Different car >> Section 111 (Horn System) >> Diagnostic Information and Procedures >> Horns Malfunction >> Circuit/System Verification

Circuit/System Verification

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  1. Verify the scan tool parameter:Horn Switch=Inactive
    • If not the specified state 

      Refer to: Circuit/System Testing - Test 1

    • Go to next step: If the specified state 
  2. Operate the component:S33 Horn Switch - Pressed

    Verify the scan tool parameter:Horn Switch=Active

    • If not the specified state 

      Refer to: Circuit/System Testing - Test 1

    • Go to next step: If the specified state 
  3. Perform the scan tool control function:Horn Relay Command - On and Off

    Verify the component turns On and Off:P12L Horn - Left & P12R Horn - Right & The horn should emit a clear and even tone.

    • If none of the components operate 

      Refer to: Circuit/System Testing - Test 2

    • P12 Horn - InoperativeorIf an abnormal noise is present 

      Refer to: Circuit/System Testing - Test 3

    • Go to next step: If the component turns On and Off & If no abnormal noise is present 
  4. All OK.
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