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Horn System: Inspection

  1. INSPECT RELAY (HORN) 
    1. Remove the HORN relay from the engine room J/B.
    2. Measure the HORN relay resistance.

    Standard: 

    HORN RELAY SPECIFIED CONDITION

    Tester Connection Specified Condition
    3 - 5 10 kΩ or higher
    3 - 5 Below 1 Ω (when battery voltage is applied to terminals 1 and 2)
    Fig 1: Inspecting Horn Relay
    G02582240Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  2. INSPECT HIGH PITCHED HORN ASSY 
    1. Check operation of the horn.

    Standard: 

    HIGH PITCHED HORN ASSY SPECIFIED CONDITION

    Measurement Condition Specified Operation
    Battery positive (+) --> Terminal 1 Battery negative (-) --> Horn bracket Horn sounds

    If the result is not as specified, replace the horn assy.

    Fig 2: Inspecting High Pitched Horn Assy
    G02582241Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  3. INSPECT LOW PITCHED HORN ASSY 
    1. Check operation of the horn.

    Standard: 

    LOW PITCHED HORN ASSY SPECIFIED CONDITION

    Measurement Condition Specified Operation
    Battery positive (+) --> Terminal 1 Battery negative (-) --> Horn bracket Horn sounds

    If the result is not as specified, replace the horn assy.

    Fig 3: Inspecting Low Pitched Horn Assy
    G02582242Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
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