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Electric Tension Reducer System: Inspection

  1. INSPECT TENSION REDUCER SOLENOID OPERATION 
    1. Connect the positive (+) lead from the battery to terminal 1, and negative (-) lead to terminal 2.
    2. Pull the belt upward and check that the belt is slowly retracted when released.
    3. Disconnect the lead from the battery.
    4. Pull the belt upward and check that the belt is retracted more quickly when released than in (b).
    Fig 1: Inspecting Tension Reducer Solenoid Operation
    G03598767Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    HINT:

    Do not tilt the retractor.

    If the operation is not as specified, replace the front seat outer belt assembly.

  2. INSPECT TENSION REDUCER SOLENOID CIRCUIT 

    Disconnect the tension reducer solenoid connector and inspect the connector on wire harness side, as shown.

    Fig 2: Identifying Terminals Of Tension Reducer Solenoid Connector
    G03598768Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    TENSION REDUCER SOLENOID CONNECTOR SPECIFIED CONDITION

    Tester connection Condition Specified condition
    2-Ground Buckle switch position OFF (belt unfastened) No continuity
    2 - Ground Buckle switch position ON (belt fastened) Continuity
    1 - Ground Ignition switch ACC or LOCK No voltage
    1 - Ground Ignition switch ON Battery positive voltage

    If the circuit is specified, replace the front seat outer belt assembly.

    If the circuit is not as specified, inspect the circuits connected to other parts.

  3. INSPECT SEAT BELT BUCKLE SWITCH CONTINUITY 
    1. Check that continuity exists between the terminals 1 and 4 on the switch side connector with the switch ON (belt fastened).
    2. Check that continuity exists between the terminals 2 and 4 on the switch side connector with the switch OFF (belt unfastened).

      If operation is not as specified, replace the switch.

    Fig 3: Inspecting Seat Belt Buckle Switch Continuity
    G03598769Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  4. INSPECT SEAT BELT BUCKLE SWITCH CIRCUIT 

    Disconnect the switch connector and inspect the connector on wire harness side, as shown.

    Fig 4: Identifying Terminals Of Seat Belt Buckle Switch Connector
    G03598770Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    SEAT BELT BUCKLE SWITCH CONNECTOR SPECIFIED CONDITION

    Tester connection Condition Specified condition
    4-Ground Constant Continuity

    If continuity is not as specified, inspect the circuits connected to other parts.