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HOMESERVICE MANUALSTOYOTA2004MATRIX XR, FWD, STANDARDREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 828 (HORN SYSTEM)INSPECTION
2004 Toyota Matrix XR, FWD, Standard

Section 828 (Horn System): Inspection

2004 Toyota Matrix XR, FWD, StandardSECTION Inspection
WARNING: This page is about a different car, the 2003 Lexus IS 300. However, it is still accessible from the selected car via links, so may be relevant.
  1. INSPECT HORN SWITCH 
    1. Disconnect the negative (-) terminal from the battery.
    2. Remove the left and right covers from the steering wheel.
    3. Using a torx socket wrench, loosen the 2 bolts.
    4. Pull up the horn pad and place it on the steering column, as shown.

      HINT:

      Do not disconnect the connector from the horn pad.

    5. Disconnect the connector from the slip ring.
      Fig 1: Using A Torx Socket Wrench To Loosening Bolts
      G03380167Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    6. Check that no continuity exists between terminal 6 of the connector and body ground.
    7. Check that continuity exists between terminal 6 of the connector and body ground when the horn contact plate is pressed against the steering spoke assembly.

      If continuity is not as specified, repair or replace the steering wheel or wire harness as necessary.

    8. Install the horn pad in place and using a torx socket wrench, torque the 2 bolts.

      Torque: 7.1 N.m (72 kgf.cm, 62 in.lbf) 

    9. Install the left and right covers.
    10. Connect the negative (-) terminal to the battery.
      Fig 2: Checking Continuity Exists Between Terminal Of Connector And Body Ground
      G03380168Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  2. INSPECT HORN OPERATION 

    Connect the positive (+) lead from the battery to the terminal and negative (-) lead to the horn body and check that the horn blows.

    If operation is not as specified, replace the horn.

  3. INSPECT HORN SWITCH CIRCUIT (See  HORN RELAY CIRCUIT  ) 
    Fig 3: Inspecting Horn Switch Circuit
    G03380169Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  4. INSPECT HORN RELAY CONTINUITY 
    SPECIFIED CONDITION CHART

    Condition Tester connection Specified condition
    Always 1 - 2 Continuity
    Apply B+ between terminals 1 and 2. 3 - 5 Continuity

    If continuity is not as specified, replace the relay.

  5. INSPECT HORN RELAY CIRCUIT (See  HORN RELAY CIRCUIT  ) 
    Fig 4: Inspecting Horn Relay Circuit
    G03380170Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
RENDER: 1.0x

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