show select checkbox looping from ajax and codeigniter

i want to show checkbox looping from db, if i try to select data id_kendaraan in field then show the data from that id.

this my view code:

<div class="modal fade" id="tambah" tabindex="-1" role="dialog" aria-labelledby="largeModal" aria-hidden="true">
            <div class="modal-dialog">
            <div class="modal-content">
            <div class="modal-header">
                <button type="button" class="close" data-dismiss="modal" aria-hidden="true">x</button>
                <h3 class="modal-title" id="myModalLabel">Tambah Pemeliharaan</h3>
            </div>
            <form class="form-horizontal" method="post" action="<?php echo base_url()?>Data/Pemeliharaan/Tambah">
                <div class="modal-body">
                    <div class="form-group">
                    <label class="control-label col-xs-3">Nama Kendaraan</label>
                        <div class="col-xs-8">
                            <select class="form-control"  name="id_kendaraan" id="id_kendaraan" required>
                            <option>Pilih Kendaraan</option>
                            <?php
                            if(!empty($kendaraan_)) {
                            foreach ($kendaraan_ as $isi) {
                            ?>
                            <option value="<?php echo $isi['id_kendaraan']?>"><?php echo $isi['nama']?> - <?php echo $isi['platno']?></option>
                            <?php }} ?>
                            </select>
                        </div>
                    </div>
                    <?php
                    $index =0;          
                    foreach ($subkriteria_ as $kr_key => $kriteria) {
                    ?>
                    <div class="form-group">
                        <label class="control-label col-xs-3"><?php echo $kriteria['nama_kriteria'] ?></label> 
                        <div class="col-xs-8">
                                <input type="hidden" name="status_pemeliharaan" value="1" class="form-control">
                                <input type="hidden" name="id_kriteria[]" value="<?php echo $kriteria['id_kriteria'] ?>" class="form-control">  
                            <?php if(!empty($kriteria['sub'])) { ?> 
                            <select class="form-control"  name="isi_kriteria[]" required>
                                <option>Pilih Sub Kriteria</option>
                                <?php $no = 1; foreach ($kriteria['sub'] as $data)     { ?>
                                <option value="<?php echo $data['value'] ?>"><?php echo $data['namasubkriteria'] ?> - <?php echo $data['value'] ?></option>
                                <?php  $no++; } ?>
                            </select>
                            <?php } else if($kriteria['link']=='tahun_beli') { ?>
                                <input name="isi_kriteria[]" value="" class="form-control" type="text" placeholder="Isi Kriteria..." readonly required>
                            <?php } else { ?>
                                <input name="isi_kriteria[]" value="" class="form-control" type="number" placeholder="Isi Kriteria..." required>
                            <?php } ?>
                        </div>
                    </div>
                    <?php } ?>
                    <div class="form-group">
                    <label class="control-label col-xs-3">tes</label>
                        <div class="col-xs-8">
                        <input type="checkbox" name="id_sparepart[]" value=""> //my trouble
                        <input type="text" name="sparepart" value=""> //my trouble
                        </div>
                    </div>
                </div> 
                <div class="modal-footer">
                    <button class="btn" data-dismiss="modal" aria-hidden="true">Tutup</button>
                    <button class="btn btn-info">Submit</button>
                </div>
            </form>
            </div>
            </div>
        </div>


<script type="text/javascript">
$(document).ready(function(){
        $('#id_kendaraan').on('input',function(){
            
        var id_kendaraan=$(this).val();
        $.ajax({
            type : "POST",
            url  : "<?php echo base_url('Data/Pemeliharaan/GetKendaraanById')?>",
            dataType : "JSON",
            data : {id_kendaraan: id_kendaraan},
            cache:false,
            success: function(data){
                $.each(data,function(id_kendaraan, tahun_beli, jenis){
                    $('[name="isi_kriteria[]"]').val(data.tahun_beli);
                    $('[name="id_jenis"]').val(data.id_jenis);
                    $('[name="id_sparepart[]"]').val(data.id_sparepart); //my trouble
                    $('[name="sparepart"]').val(data.sparepart); //my trouble
                        
                });
                    
            }
        });
        return false;
    });
});
</script>

on this code, if I select a kendaraan from the select form then data appears according to the selected kendaraan. it is working, but on the checkbox not show data sparepart for looping from database.

this my controller:

function GetKendaraanById(){
        $id_kendaraan=$this->input->post('id_kendaraan');
        $data=$this->PemeliharaanModel->GetById($id_kendaraan); ;
        echo json_encode($data);
      }

i get data from view $id_kendaraan for my parameter.

this my model:

function GetById($id_kendaraan){
        $this->db->select('*');
        $this->db->from('tb_kendaraan');
        $this->db->join('tb_sparepart', 'tb_sparepart.id_jenis = tb_kendaraan.id_jenis');
        $this->db->where('tb_kendaraan.id_kendaraan',$id_kendaraan);
        $query = $this->db->get();
        if($query->num_rows() > 0)
        {
        foreach ($query->result() as $data) {
                $hasil=array(
                    'tahun_beli' => $data->tahun_beli,
                    'id_jenis' => $data->id_jenis,
                    'id_sparepart' => $data->id_sparepart,
                    'sparepart' => $data->sparepart,
                    );
            }
        }
        return $hasil;
    }

field tahun_beli, id jenis is success to showing in the view. but the checkbox from sparepart is not looping just show one data.

thx for helping me