Litar Kipas Dual Speed Kancil
18:14
Brake Master Pump Leaking Kancil
11:51
Starter rosak ke ??
13:30
2 жыл бұрын
New Circuit for RPM Greedy Problem
9:30
kenal wiring meter kancil 850 660
21:41
Pasang O2 Sensor Kancil
6:46
3 жыл бұрын
Tukar Aircond Denso ke Sanden Kancil
17:42
Carta Suhu Aircond Kereta
2:45
3 жыл бұрын
Bongkar Rahsia Carburator Kancil
1:38:03
Fuel Pump Elektrik MOdi Kancil
7:37
3 жыл бұрын
Blind Spot Monitoring System Kancil
24:39
Daytime Running Light DIY Kancil
6:53
Engine Treatment - Jaga enjin kancil
6:55
Пікірлер
@AhmadsherishafizaSheri
@AhmadsherishafizaSheri Күн бұрын
salam bos..ade no fon x..nk tye pasal aircond ckit🙏🏻🙏🏻🙏🏻
@rizalhanapiah56
@rizalhanapiah56 Күн бұрын
Tuan..hose vacuum saiz apa ya nak pilih..nk bli kat shopee
@sapikbencana999
@sapikbencana999 2 күн бұрын
assalamualaikum bang .. klu pkai tu ... alarm remote boleh pakai ke bang ?😊
@sapikbencana999
@sapikbencana999 2 күн бұрын
masalah kancil saya bang kalau saya tekan bawah lock bgian driver smue ikut turun .. tapi kalau saya tarik balik dah taknak ikut dah .. ape punca msalahnya tu bang ?
@hanizanhanizan1684
@hanizanhanizan1684 3 күн бұрын
Asalam bang.. Saya kancil bocor time parking.. Kalau jalan x pastinjgk... Apabila check nampak mcm semua basah lat bawah enjen.. Pelik sebab x tahu sangat pasal kereta... Klau parking ada menitis... Gasket dah tukar,sma jgk jadi.. 😢
@zaimrahim2300
@zaimrahim2300 8 күн бұрын
Mantap bang. Tkasih perkongsian nya.
@ZallywhoVideoChannel
@ZallywhoVideoChannel 7 күн бұрын
Sama2
@muhammadhafiz6580
@muhammadhafiz6580 8 күн бұрын
Bag tau x gear plastik tu ada jual kat mana
@ZallywhoVideoChannel
@ZallywhoVideoChannel 7 күн бұрын
Gear plastic takada jual kedai sparepart.. kalau ada pun cari kedai haftcut yg masih simpan
@liewminrui3343
@liewminrui3343 13 күн бұрын
Boss, kalau motor fan dah bypass kat Fan Switch, dia boleh on bila kunci pusing saja. So betul ka dia Fan Switch saja yg rosak?
@ZallywhoVideoChannel
@ZallywhoVideoChannel 8 күн бұрын
Ya betul
@MisterKay-n4e
@MisterKay-n4e 13 күн бұрын
Terima kasih....saya akan Cuba ikut saudara punya Kaedah cuci semua pipe air... Pasti berhasil...❤
@ZallywhoVideoChannel
@ZallywhoVideoChannel 8 күн бұрын
Sama2.. apa2 mslh boleh komen
@muhammadfirdaus6738
@muhammadfirdaus6738 13 күн бұрын
Salam abg . Sy nk jalan aircond kat kereta sy kancil kacuk enjin l5jbjl .. mcm mna nk buat abg .. minta tnjuk ajar bng
@ZallywhoVideoChannel
@ZallywhoVideoChannel 8 күн бұрын
Wslm.. perlu tahu dlu ecu jenis apa yg digunakan utk buat sambungan drp aircond amp asal ke ecu
@CMChan-z8q
@CMChan-z8q 14 күн бұрын
Salam bang, aircond sejuk hanya pagindan malam.. Petang lunch memang tak sejuk macam buka kipas saja. Baru saja service aircond.. Bleh advise tak.
@ZallywhoVideoChannel
@ZallywhoVideoChannel 8 күн бұрын
Wslm.. apa yg tuan sudah service? Kemungkinan masalah pada condensor atau sistem radiator atau thermostat yg sumbat
@akimable6036
@akimable6036 14 күн бұрын
Kalau cooling coil bocor boleh guna ke bos? Sebab bunyi gas bocor dalam dashboard
@ZallywhoVideoChannel
@ZallywhoVideoChannel 8 күн бұрын
Boleh cuba tp jika bocor tu terlalu besar tidak boleh sbb ia hanya utk bocor halus shj
@SYEDALWIE-e2n
@SYEDALWIE-e2n 16 күн бұрын
kancil 850 auto same k
@ZallywhoVideoChannel
@ZallywhoVideoChannel 16 күн бұрын
Ya sama juga
@faDzli363
@faDzli363 18 күн бұрын
Sy xde vacum boleh ke kalau x vacum seblm isi gas
@ZallywhoVideoChannel
@ZallywhoVideoChannel 16 күн бұрын
Tidak digalakan sbb jika tidak vacuum dlm udara ada air. Air itu boleh merosakkan sistem
@faDzli363
@faDzli363 16 күн бұрын
@ZallywhoVideoChannel okey2 kena cari vacum jugak la nampk gaya nye.. Terima kasih atas respon nye👍👍👍
@ZallywhoVideoChannel
@ZallywhoVideoChannel 15 күн бұрын
@faDzli363 sama2
@adzharidris2777
@adzharidris2777 22 күн бұрын
Aslmualaikum bos kereta viva sy ada masalah masuk gear 1 termenung....auto
@ZallywhoVideoChannel
@ZallywhoVideoChannel 18 күн бұрын
Wslm.. adakah tuan sudah check minyak cukup dan ia bersih?? Jika ini ok.. try masukkn treatment dulu
@ahmadfaiz9849
@ahmadfaiz9849 23 күн бұрын
Nk tnyaa…jika nk buka compressor utk tukar seal yg bocor compressor tu mmg kena vacum and t4 gas jugak ke bang???xde valve tutup ke
@ZallywhoVideoChannel
@ZallywhoVideoChannel 23 күн бұрын
Ya betul akan keluar semua gas.. sbb comp kereta tiada tank simpanan gas
@SYEDALWIE-e2n
@SYEDALWIE-e2n Ай бұрын
bang kancil sy gear 1 nk masuk gear 2 xblh auto lama sikit bru masuk
@ZallywhoVideoChannel
@ZallywhoVideoChannel Ай бұрын
Kena check galvernor valve jika ada masalah tercabut
@Awienurumi
@Awienurumi Ай бұрын
bang nk tnye belt knpe cpt haus bru tukar keta kncil
@ZallywhoVideoChannel
@ZallywhoVideoChannel Ай бұрын
Biasanya masalah pulley yg karat atau pulley yg bengkok atau tidak align
@Awienurumi
@Awienurumi Ай бұрын
@@ZallywhoVideoChannel oo mcm tu terima kasih
@chaii7
@chaii7 Ай бұрын
saya dah cuba ikut wayar belakang meter tetap sama tk hidup😌
@ZallywhoVideoChannel
@ZallywhoVideoChannel Ай бұрын
Ini untuk kereta apa ya?
@dzulhapizanojoj1551
@dzulhapizanojoj1551 Ай бұрын
Saya dah beli... Tak function cap botol ni leak.. lepas beli lg sama gak... Munkin cap tu x bleh tahan pressure dlm pipe L tu..
@ZallywhoVideoChannel
@ZallywhoVideoChannel Ай бұрын
Adakah tuan telah buka aircond semasa masukkn?
@dzulhapizanojoj1551
@dzulhapizanojoj1551 Ай бұрын
Ya saya on aircond...
@ZallywhoVideoChannel
@ZallywhoVideoChannel Ай бұрын
Boleh share saya link beli dimana.. sbb pelik tu..
@msafwan3010
@msafwan3010 Ай бұрын
Kancil hilang penyerap vapor untuk fuel-system (diberi nama "Charcoal Canister" dalam manual Daihatsu Mira). Kalau buka penutup minyak selepas drive boleh dengar pressure terlepas keluar. Rasa macam ada design-flaw kat sini, takkan dia design pressure dalam tangki + fuel-pump kan? ini mesti terlepas pandang.
@khaiangah3164
@khaiangah3164 Ай бұрын
Nk flushing kompressor bole rojer2 rm 60
@amintasa3945
@amintasa3945 Ай бұрын
Fungsi dia apa abg
@ZallywhoVideoChannel
@ZallywhoVideoChannel Ай бұрын
Fungsi dia untuk cut minyak semasa enjin dh mati..
@IrFa-u1s
@IrFa-u1s Ай бұрын
Assalamualaikum.. Nk tanya kalau tekan myk ada bunyi tu masalah gearbox jgk ke
@ZallywhoVideoChannel
@ZallywhoVideoChannel Ай бұрын
Wslm.. bunyi mcmane tu ya?
@IrFa-u1s
@IrFa-u1s Ай бұрын
Bunyi loceng
@ZallywhoVideoChannel
@ZallywhoVideoChannel Ай бұрын
Kalau masa idle ia bunyi tak?
@IrFa-u1s
@IrFa-u1s Ай бұрын
@ZallywhoVideoChannel ya ada bunyi
@ZallywhoVideoChannel
@ZallywhoVideoChannel Ай бұрын
Kalau mcmtu mungkin masalah bunyi bearing pulley atau bearing belt tensioner
@timurbaybyharista2165
@timurbaybyharista2165 Ай бұрын
Terima kasih atas tunjuk ajar yg berguna. Semoga Allah membalas jasa tuan atas ilmu tersebut.
@ZallywhoVideoChannel
@ZallywhoVideoChannel Ай бұрын
Tksh juga
@LittleBoy322
@LittleBoy322 Ай бұрын
Hi. I have carburettor problem. May i come to you please?
@ZallywhoVideoChannel
@ZallywhoVideoChannel Ай бұрын
Hi.. what is you carburettor problem ?
@LittleBoy322
@LittleBoy322 Ай бұрын
engine rpm stick on 3k rpm and wouldn't drop back to idle. When Off engine have ‘’Batuk‘’ that Sir mention.
@LittleBoy322
@LittleBoy322 Ай бұрын
Thanks for replying 🙏
@ZallywhoVideoChannel
@ZallywhoVideoChannel Ай бұрын
Ok can you 1st check during morning before start engine, does the auto choke plate is closed? Then after engine running hot does the plate is opened 90 dgree ?
@LittleBoy322
@LittleBoy322 Ай бұрын
​@ZallywhoVideoChannel I check. It open at the morning.
@nisamohd3583
@nisamohd3583 Ай бұрын
terima kasih atas ilmu ni bang..terima kasih banyak banyak
@sperrowsperroww9922
@sperrowsperroww9922 Ай бұрын
Bang nak tanya sikit. Sya punnya kancil kira 2 mggu sudah kipas xmau jalan bila on aircond. Selama ni ok je.... Dh try pkai relay keta kancil adik tetap xjalan..... Apa mslahnya bang..... Adakah motor fan
@msafwan3010
@msafwan3010 24 күн бұрын
tengok pada motor-fan tu, check wayar dari fan tu ke soket, kut tercabut. (Mana la tahu, masa tukar bateri tertarik wayar tu jadi longgar)
@sperrowsperroww9922
@sperrowsperroww9922 24 күн бұрын
@msafwan3010 sudah tuan ok je wayar n soket tu.. Myb motor fan rosak ke tuan
@ZallywhoVideoChannel
@ZallywhoVideoChannel 23 күн бұрын
Nk tahu motor rosak perlu check semasa tutup aircond dan enjin panas, adakah kipas berpusing. Jika tidak berpusing kemungkinan motor kipas rosak.. jika ada modi wiring, check motor direct ke batteri
@sperrowsperroww9922
@sperrowsperroww9922 23 күн бұрын
@@ZallywhoVideoChannel thnk u tuan nanti sye check
@sperrowsperroww9922
@sperrowsperroww9922 23 күн бұрын
@@ZallywhoVideoChannel mcm mne direct kt btri tuan..... Cucuk wyr kt soket moto kh
@manafeiyra4123
@manafeiyra4123 Ай бұрын
Bang nk tnya. Gas ada compressor tak engaged. Apa mslh bang. Pressure suis dh tukar
@ZallywhoVideoChannel
@ZallywhoVideoChannel Ай бұрын
Sblm tu adakah semasa ON aircond tu kipas radiator jalan?
@manafeiyra4123
@manafeiyra4123 Ай бұрын
Kipas jalan bang
@manafeiyra4123
@manafeiyra4123 Ай бұрын
@@ZallywhoVideoChannel jalan bang.on aircond kipas jalan bang
@ZallywhoVideoChannel
@ZallywhoVideoChannel Ай бұрын
Jika jalan semasa buka aircond dan bhenti semasa off aircond, perlu guna guna test pen 12v check soket compressor tu ada api tak masa ON aircond.. jika xda boleh jd masalah wiring soket itu ke aircond amp
@manafeiyra4123
@manafeiyra4123 Ай бұрын
@ZallywhoVideoChannel ok.nnt ada masa sy cek LG bang
@rizalhanapiah56
@rizalhanapiah56 Ай бұрын
Salam..tuan buat sorang turunkan tangki tu?
@ZallywhoVideoChannel
@ZallywhoVideoChannel Ай бұрын
Wslm.. ya saya sorang
@exherlle
@exherlle Ай бұрын
Assalamualaikum bang, kereta viva auto saya gear 3, 4, tak masuk kenapa ya😅
@ZallywhoVideoChannel
@ZallywhoVideoChannel Ай бұрын
Wslm.. kemungkinan ada masalah pressure leak dlm geabox disebabkan seal yg keras dan rosak.. try guna treatment..
@exherlle
@exherlle Ай бұрын
@ZallywhoVideoChannel ok bang. Terima kasih 😃
@mohdaudi656
@mohdaudi656 Ай бұрын
Wayar spring tu beli kt mne?
@ZallywhoVideoChannel
@ZallywhoVideoChannel Ай бұрын
Boleh beli dalam shopee ya
@sarveenishaan
@sarveenishaan Ай бұрын
Nape lepas adjust cable gear tu, timing jadi tinggi ye ? Bile sy try tolak lingkage tu, baru timing turun. Pasti bile rem naik balik😢. Dh pergi byk kedai, diorang kata carburetor problem.
@ZallywhoVideoChannel
@ZallywhoVideoChannel Ай бұрын
perkara penting mula2 kena pastikan auto choke berfungsi dengan baik dahulu.. sebab ini akan ganggu semuanya jika tidak ok. plate auto choke tutup rapat masa enjin sejuk pagi dan buka 90 darjah setelah enjin mula panas. Pastikan setting choke semasa sejuk dan timing idle semasa panas barula last cable gear.
@anthonysindi1591
@anthonysindi1591 Ай бұрын
Salam bang...nak tanya kancil saya bila saya on lampu temperature terus naik.bila saya off terus turun dia punya temperature.kadang kalau saya pasang aircond tekan brek pun taiming pandai lari pandai turun naik..agak ada wayar shot kh tu bang?
@ZallywhoVideoChannel
@ZallywhoVideoChannel Ай бұрын
wslm.. utk kenal pasti dlu.. try test semasa enjin sejuk pagi.. adakah buka je lampu temp meter terus naik maximum? jika berlaku ini maka ada short wire antara lampu dan meter... mungkin short dekat wiring pada meter. atau mana point yg melibatkan lampu
@safrinshahzuan7482
@safrinshahzuan7482 Ай бұрын
Brek makan tpi bila tekan jdi lekat dan pedal jdi keras sbb ini jgk ke bang
@ZallywhoVideoChannel
@ZallywhoVideoChannel Ай бұрын
Cuba check break booster hose vacuum adalah ia terbalik atau ada kebocoran pada hose.
@safrinshahzuan7482
@safrinshahzuan7482 Ай бұрын
@@ZallywhoVideoChannel cara bleeding ad vdeo tak bang
@ZallywhoVideoChannel
@ZallywhoVideoChannel Ай бұрын
@safrinshahzuan7482 ini ya.. Brake bleeding kancil kzbin.info/www/bejne/g6uvfqyGbryphq8.
@safrinshahzuan7482
@safrinshahzuan7482 Ай бұрын
@@ZallywhoVideoChannel tuan kete sy bila mati enjin brek jdi ok tpi bwk brek jd keras dan pad disc jd lekat
@safrinshahzuan7482
@safrinshahzuan7482 Ай бұрын
@@ZallywhoVideoChannel saya dh cuba bleeding dah tkr hose brek disc jadi terkapit jgk..bila cabut hose servo bru pad disc terlepas
@maarnasrul1717
@maarnasrul1717 Ай бұрын
bang, disini susah cari part seperti itu
@ZallywhoVideoChannel
@ZallywhoVideoChannel Ай бұрын
Try beli online dlm shopee
@maarnasrul1717
@maarnasrul1717 Ай бұрын
@ZallywhoVideoChannel shopee indo tak ada yg jual konektor hose macam tu bang
@ZallywhoVideoChannel
@ZallywhoVideoChannel Ай бұрын
tuan boleh check link ini.. shopee.co.id/ORIGINAl-1-set-3-way-4-way-pipa-air-ceria-i.29191166.10845033572
@maarnasrul1717
@maarnasrul1717 Ай бұрын
@ZallywhoVideoChannel terima kasih bang,
@ZallywhoVideoChannel
@ZallywhoVideoChannel Ай бұрын
Sama2
@maarnasrul1717
@maarnasrul1717 Ай бұрын
bang, saya pernah lihat jalur to timed ported port disambung ke advance timing, tapi punya abang kebalikannya. yang betul mana bang? mohon dijelaskan bang 🙏
@ZallywhoVideoChannel
@ZallywhoVideoChannel Ай бұрын
Timed ported port belakang carburator sambung ke port paling atas port distributor yg betul.
@faredzul8358
@faredzul8358 Ай бұрын
Salam bang..nak tanya..kalau minyak lebih time start dan dia jadi overflow ..ape punca dia ye??
@ZallywhoVideoChannel
@ZallywhoVideoChannel Ай бұрын
Wslm.. kemungkinan masalah auto choke tidak bfungsi atau cable sangkut
@ziman751
@ziman751 Ай бұрын
Terima kasih boss ku bagi ilmu
@khairulfarihan93
@khairulfarihan93 Ай бұрын
Jd ke bang?? Beli kt mana ekk
@ZallywhoVideoChannel
@ZallywhoVideoChannel Ай бұрын
Jadi.. saya beli di shopee.. tp peringatan ia hanya dpt tutup bocor halus sahaja ya.
@minahjar
@minahjar 2 ай бұрын
Salam tuan saya ada kancil auto sdh tukar enjin monting masih juga ada bunyi masuk jak gear revers bunyi gegar
@ZallywhoVideoChannel
@ZallywhoVideoChannel 2 ай бұрын
Wslm.. mungkin ada mslh dengan timing idle terlalu rendah atau masalah hose vacuum bocor atau tercabut.
@minahjar
@minahjar 2 ай бұрын
@ZallywhoVideoChannel teming tinggi 190 rpm
@ZallywhoVideoChannel
@ZallywhoVideoChannel Ай бұрын
Gegaran yg bunyi tu pada dashboard ke atau bahgaian mana ya? Kena kenal pasti punca bunyi
@minahjar
@minahjar Ай бұрын
@@ZallywhoVideoChannel d bahagian enjin sebelum tukar enjin monting ok lagi xada bunyi tu selepas tukar jak terus ada bunyi saya pun pening sdh cari masalah dia ni
@minahjar
@minahjar Ай бұрын
Pemasangan ok semua fit sdh
@hairuladnansaad1594
@hairuladnansaad1594 2 ай бұрын
Kalau pakai to..kan kita tak payah pkai meter to dah
@hairuladnansaad1594
@hairuladnansaad1594 2 ай бұрын
Salam bossku...maaf bertanye...mcm kita dah buh uv light to...kita da cek bhagian dpn bonet semua xde kesan uv to...dan soalan saya..mmg kebocoran to..pada colingcoil la kn....lepas to..saya nk tanye..mcm kita beli gas yg jenama pokka dekat shopee to..bolh masuk ke dekat kepala L presser to ya..to kan mcm jenis 4 dlm 1..da siap sekali ade uv light...kalau nk masuk asing uv to..pkai meter to..saya punye yg singel meter punye..2 wayer...boleh ke pkai yg saya ckp to...
@ZallywhoVideoChannel
@ZallywhoVideoChannel 2 ай бұрын
Wslm.. mula2 kena pastikan ia bocor besar atau kecil.. bocor yg besar gas akan cepat abis dlm 1-5 hari.. jika bocor yg halus, gas abis dlm masa yg lama 1-3 bulan.. bocor halus agak ssh nk jumpa tetapi dengan guna bahan itu akan menutup bocor tersebut.. jika kes tuan bocor yg cepat .. mungkin ada kebocoran dekat coil.. dan bocor di coil ada tanda semasa buka aircond akan bau gas atau kuar kabus pada vent aircond
@mcplayers7138
@mcplayers7138 2 ай бұрын
👍👍👍
@noraliffhaiqal3716
@noraliffhaiqal3716 2 ай бұрын
mcam mna nak thu jenis compersor sama dan sanden dan densor.sbb wira sy jem comperesor dan nak beli bru...tetapi xthu jenis apa.bolih bgi pencerahhan.
@ZallywhoVideoChannel
@ZallywhoVideoChannel 2 ай бұрын
Biasa denso body compressor bentuk selinder manakala sanden bentuk selinder ada lekuk2 piston pada body dia..
@aqilmama9758
@aqilmama9758 2 ай бұрын
Kalau myvi old..boleh masuk kan ikut lubang yg kt sbelah kanan tak bang?sbb kpla yg kt sbelah kiri agak besar..
@ZallywhoVideoChannel
@ZallywhoVideoChannel 2 ай бұрын
Perlu masukkn kepala L sahaja
@anthonysindi1591
@anthonysindi1591 2 ай бұрын
Salam bang..nak tanya kancil saya 660 convert gearbox pg auto..pertanyaan pertama saya ada jual tak tempat sangkut cable throttle body auto tu pasal dekat kaboreter kancil saya tu khas untuk cable minyak aja..dan soalan ke 2 pula bang ada video cara tukar cable dari gerbox auto tu ke kaboreter..?
@ZallywhoVideoChannel
@ZallywhoVideoChannel 2 ай бұрын
Wslm.. bracket cable tu pada carb tak ada jual.. kena cari kedai haftcut jika ada. Video tukar cable xda.. jika nk tukar kena buka oil sump gearbox utk bukak cable drp dlm.. dan buka skru 10 pada cable luar body gearbox
@anthonysindi1591
@anthonysindi1591 2 ай бұрын
Kalau tak pasang tu cable ada masalah kh bang?
@ZallywhoVideoChannel
@ZallywhoVideoChannel 2 ай бұрын
@anthonysindi1591 xda mslh masih boleh masuk gear cume tidak boleh downshift masa overtake kereta..
@anthonysindi1591
@anthonysindi1591 2 ай бұрын
O...ok bang..terima kasih infonya...
@azrulmorris8457
@azrulmorris8457 2 ай бұрын
Assalamualaikum Tuan, Nak tanya kancil saya boleh start tapi bila jalan blm berapa lama jalan enjin mati.apa yang saya perasan choke tu tak terbuka 90 darjah masa kipas enjin dah pusing dan ada asap hitam keluar.adakah sebab choke tu atau ac pump dan fuel filter juga memainkan peranan.
@ZallywhoVideoChannel
@ZallywhoVideoChannel 2 ай бұрын
Wslm.. jika choke tak buka abis menyebabkan minyak lebih menyebabkan asap hitam keluar. tuan perlu cuci paip carb bypass jika ia sumbat dan cuci atau tukar paip bypass hose bersama2 joint 3 way dan 4 way.
@yaacobbinm.salleh5278
@yaacobbinm.salleh5278 2 ай бұрын
Timing tak dapat 1.3 skrg rpm 2.3 dan tiba2 boleh mati mcm minyak tak sampai
@ZallywhoVideoChannel
@ZallywhoVideoChannel 2 ай бұрын
Ok nanti esok pagi tuan perlu check kdn plate auto choke mesti dlm kdn tertutup rapat dan check setelah mula2 start rpm berada pd 2.3 dan setelah panas plate mesti terbuka 90 darjah luas.. jika tidak terbuka masalah utama ialah hose air bypass telah tersumbat perlu tukar atau cuci bersama2 joint2 dia..
@reezhasan3745
@reezhasan3745 2 ай бұрын
masalah api tak ada. coil, cable, distributor dah baru. cek guna test light pd soket coil dgn distributor ada keluar api. tapi dari cable coil dgn plug langsung takde api spark. fius ok takde putus. mintak tolong bang mana lg nk cek.
@ZallywhoVideoChannel
@ZallywhoVideoChannel 2 ай бұрын
Wasap saya wa.me/message/DLTAH4PH74KHO1