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  1. Join Date
    Apr 2007
    Posts
    23
    #1
    Hello guys,

    First of all let me congratulate you guys for having this kind of helpful community.

    Also, maraming salamat po Sir Ramon a.k.a 4jgtoots for the time and suggestions you've provided.

    engine: 4jg2 [unit from subic, converted]


    My problem is that my unit doesn't autoshift anymore [kahit todo apak na sa accelerator], the "Reverse" is good but it has not enough power in "D", it will only start to crawl at 2000rpm.

    nandito po ako sa Baguio kaya medyo limited ang resources ko. nagpalit nako ng ATF, malinis na din po ang sump filter. pero ganun pa din ang problema ko.

    kahapon pina check ko sa rapide baguio ang electrical wiring it took them 8 hours to complete the checking, na obserbahan ko lang po na connection lang ang na check nila pero hindi yung mga end connections going to sensors.... as of today ganun pa din problem ko ...

    sabi nila trans daw problem....


    baka meron po kayo idea kung ano pa possible cause ng problem ko..

    thanks po

  2. Join Date
    Jan 2006
    Posts
    1,682
    #2
    ltx,

    Let us wait for other inputs.
    M/t kasi yung akin so hindi ko na experience pa yan.
    I am sure someone has the same problem as you have.

  3. Join Date
    Jan 2006
    Posts
    1,682
    #3
    ltx,

    Let us wait for other inputs.
    M/t kasi yung akin so hindi ko na experience pa yan.
    I am sure someone has the same problem as you have.

  4. Join Date
    Dec 2003
    Posts
    11,316
    #4
    wag po dalhin sa rapide

  5. Join Date
    Apr 2007
    Posts
    23
    #5
    Quote Originally Posted by 4JGtootsie View Post
    ltx,

    Let us wait for other inputs.
    M/t kasi yung akin so hindi ko na experience pa yan.
    I am sure someone has the same problem as you have.

    Ok,

    update: humiga nako sa ilalim ng sasakyan kanina po .. checked wiring going to transmission, ok naman hindi basa at hindi grounded.

    reconnect all wiring .... kaso ganun pa din problem

  6. Join Date
    Apr 2007
    Posts
    23
    #6
    Quote Originally Posted by 4JGtootsie View Post
    ltx,

    Let us wait for other inputs.
    M/t kasi yung akin so hindi ko na experience pa yan.
    I am sure someone has the same problem as you have.

    Ok,

    update: humiga nako sa ilalim ng sasakyan kanina po .. checked wiring going to transmission, ok naman hindi basa at hindi grounded.

    reconnect all wiring .... kaso ganun pa din problem

  7. Join Date
    Dec 2003
    Posts
    11,316
    #7
    dati ganyan din 98 a/t starex namin, ayaw magshift beyond 2nd gear ata, dunno wat my bro did though

  8. Join Date
    Jul 2003
    Posts
    590
    #8
    Anong model ng bighorn mo?
    Kasi possible TPS ang problema mo, minsan kasi nagalaw ko yung TPS ko biglang ng nagloko yung shifting niya buti nalang mark ko kung paano ko ang original setting niya tapos binalik ko lang naayus ko ulit. Try to check it kung 92-93 model ka.

    Quote Originally Posted by ltx View Post
    Hello guys,

    First of all let me congratulate you guys for having this kind of helpful community.

    Also, maraming salamat po Sir Ramon a.k.a 4jgtoots for the time and suggestions you've provided.

    engine: 4jg2 [unit from subic, converted]


    My problem is that my unit doesn't autoshift anymore [kahit todo apak na sa accelerator], the "Reverse" is good but it has not enough power in "D", it will only start to crawl at 2000rpm.

    nandito po ako sa Baguio kaya medyo limited ang resources ko. nagpalit nako ng ATF, malinis na din po ang sump filter. pero ganun pa din ang problema ko.

    kahapon pina check ko sa rapide baguio ang electrical wiring it took them 8 hours to complete the checking, na obserbahan ko lang po na connection lang ang na check nila pero hindi yung mga end connections going to sensors.... as of today ganun pa din problem ko ...

    sabi nila trans daw problem....


    baka meron po kayo idea kung ano pa possible cause ng problem ko..

    thanks po

  9. Join Date
    Nov 2006
    Posts
    299
    #9
    palagay ko may problema ang shift valve kung hydrolic control sya or shift solenoid kung electronic control ang transmission ng kotse mo.

  10. Join Date
    Jun 2006
    Posts
    843
    #10
    Quote Originally Posted by ltx View Post
    Hello guys,

    First of all let me congratulate you guys for having this kind of helpful community.

    Also, maraming salamat po Sir Ramon a.k.a 4jgtoots for the time and suggestions you've provided.

    engine: 4jg2 [unit from subic, converted]


    My problem is that my unit doesn't autoshift anymore [kahit todo apak na sa accelerator], the "Reverse" is good but it has not enough power in "D", it will only start to crawl at 2000rpm.

    nandito po ako sa Baguio kaya medyo limited ang resources ko. nagpalit nako ng ATF, malinis na din po ang sump filter. pero ganun pa din ang problema ko.

    kahapon pina check ko sa rapide baguio ang electrical wiring it took them 8 hours to complete the checking, na obserbahan ko lang po na connection lang ang na check nila pero hindi yung mga end connections going to sensors.... as of today ganun pa din problem ko ...

    sabi nila trans daw problem....


    baka meron po kayo idea kung ano pa possible cause ng problem ko..

    thanks po

    sir, im sad to say thr trans po ang may sira nyan.. dats the very usual prob ng bighorn... lalo na pag automatic... dami na rin napalitan namin nyan sa cebu... but the prob was that magorder pa yan sa labas and it would take time and money... mahal yun trans kc.. unless makabili k ang surplus din na trans na pwede mo ipalit...

  11. Join Date
    Jan 2006
    Posts
    1,682
    #11
    ltx,
    Try the advise of Nap123 two years ago yan din ang ni text niya na problem niya. When you told me your predicament I was thinking of Nap that is why i asked you to post it sa thread. If i'm not mistaken TPS is Throttle Position Sensor, drive by wire kasi no cables.

    Nap pare,
    kamusta na?
    Last edited by 4JGtootsie; July 21st, 2007 at 10:32 PM.

  12. Join Date
    Apr 2007
    Posts
    23
    #12
    Quote Originally Posted by nap123 View Post
    Anong model ng bighorn mo?
    Kasi possible TPS ang problema mo, minsan kasi nagalaw ko yung TPS ko biglang ng nagloko yung shifting niya buti nalang mark ko kung paano ko ang original setting niya tapos binalik ko lang naayus ko ulit. Try to check it kung 92-93 model ka.

    Sir Nap thank you sa response mo ..


    1992 Bighorn po, with reagrds sa TPS actually nakuhaan ko pa ng volatge reading yung TPS ng bighorn ko bago nag ka problema. and reading after autoshifting prblem was encountered

    *** TPS Previous reading [ignition ON] measure voltage across tps middle terminal and chassis ground

    TPS at idle = 0.34V [ good, nag autoshift during driving]
    TPS reading kapag todo tapak sa accelerator = almost 5.0V

    ======

    *** TPS current reading after autoshifting problem

    TPS at idle = 0.035V
    TPS at todo apak ng accelerator = 0.5V


    Funny thing is that almost the same figure ang reading, yun nga lang may 0.0V sa na nauna....



    ** by the way, nag pa underwash pala akobago ko na ramdaman ang problema ... related kaya sa pa underwask ko kaya nasira?



    Sir Jarhead, thank you po sa response, pero sana hindi trans. nagagamit ko pa naman yung bighorn, sa umpisa i shift ko sya sa "2" or"L" the kapag nas 40 na ang speed ko i shift ko na sya sa "D" .. oka naman ang takbo nakaka 120 pa.. kaso wala naman autoshifting ...waaaHHH!!!!


    Sir Dennis Powell, if ever shifting valve ang problema, saan po kaya ako pwede mag pagawa, meron ba dyan sa banawe?


    nakaapekto din kaya yung additive na nilagay ko sa ATF ko?


    sya nga pala, ipinababa ko na sa manila yung ride ko, na check daw kanina sa isuzu cavite.. they will try to check the trans pressure sa monday.

    sir salamat po ulit sa iputs, more inputs please

    P.S. may nag sabi sa akin sa BALTAC daw sa may banawe, saan yun?

  13. Join Date
    Jun 2005
    Posts
    211
    #13
    Sir, had the same problem with my bighorn.. ayaw mag downshift even if i floor it.. i had to shift it to 2 or L then shift to D.. had everything checked and walang sira sa electrical.. so as adviced by a cousin, i went to Baltac near Banawe/Araneta Ave.. they checked it and said the auto trans needs to be overhauled.. they used the surplas parts of a pajero to overhaul the bighorn.. it took them 1 whole day to finish the job and after shelling out 45t, the a/t of the bighorn was fixed.. i really think the money i spent was well worth it..

    the bighorn's a/t was functioning well after the overhaul, whenever i step on the accelerator pedal, the tranny downshifts and when i release the pedal, it upshifts already..

    sulit ang gastos to have it overhauled.. if you do go to baltac, sir tawad ka sa initial estimate nila.. magaling at sulit naman sa kanila.. hope this helps..

  14. Join Date
    Jul 2003
    Posts
    590
    #14
    Ah okay no problem bro. I just copy and paste this na save ko kasi sa mga notes ko.

    HOPE THIS WILL BE OF SOME HELP AS THE DETAILS ARE FROM A MANUAL ..

    THE TPS SENSOR IS A POTENTIOMETER WITH ONE END CONNECTED TO 5 VOLTS FROM THE ECM AND THE OTHER TO GROUND,A THIRD WIRE IS CONNECTED TO THE ECM TO MEASURE THE VOLTS FROM THE TPS AS THE THROTTLE IS MOVED THE VOLTS CHANGE..WHEN THROTTLE IS CLOSED THE OUTPUT AT THE TPS IS APPROX. (.5volts)AS THROTTLE OPENS THE OUTPUT INCREASES SO WIDE OPEN THROTTLE IS APPROX. (4.5volts)

    testing..

    IF YOU ARE LOOKING AT THE SENSOR SO THE WIRES ARE ON THE LEFT (A)IS AT THE BOTTOM +5REF
    (B)IS IN THE MIDDLE GROUND
    (C)IS AT THE TOP AND IS THE TPS SIGNAL

    1)backprobe with a high impedance voltmeter at the outside TPS terminals (A+B)
    2)with the key ON and engine off,the voltmeter reading should be approx 5.0 volts
    3)if the voltage was not as specified,either the wiring to the TPS or the ECM may be faulty.correct any faults
    4)backprobe with voltmeter, center and lower terminals(C+B)
    5)with the key ON engine off and throttle closed,the TPS voltage should be approx 0.5-1.2 volts
    6)verify that the TPS voltage increases or decreases smoothly as the throttle is opened or closed.make sure to open and close the throttle very slowly in order to detect any abnormalities in the TPS voltage reading
    7)if the voltage is not as specified,replace the sensor

    REMOVAL AND INSTALLATION


    1)disconnect the negative bettery cable and remove air filter and gasket
    2)disengage the electrical connector
    3)unfasten the two TPS attaching screw assemblies
    4)remove the TPS from the throttle body
    5)remove the TPS seal

    to install..

    1)install the TPS seal over the throttle shaft
    2)with the throttle valve closed,install the TPS on the throttle shaft,rotate it counter clockwise,to align the mounting screws
    3)install the two TPS mounting screw assemblies
    4)engage the electrical connector
    5)install the air cleaner and gasket
    6)reattach the battery cable



    Bro most 3.1D auto trans TPS ang nagin problema kaya test mo muna. Maaring iadvise ng mga mekaniko na overhaul yan tapos papalitan lang nila ng TPS syempre okay na ang TRANSMISSION mo, Im not saying na yun ang ginawa sa iba posible rin na talagang sira na ang transmission talaga. since sabi mo naman na drive mo sya sa tingin ko TPS ang problema mo. I encountered yan problem na erratic ang shifting ng bighorn ko noong nagalaw ko TPS bigla nalang nagdownshift. Check mo muna sa ibang mekaniko hindi biro ang 45K na gagastusin mo.



    4jg2totsie okay lang bro.




    Quote Originally Posted by ltx View Post
    Sir Nap thank you sa response mo ..


    1992 Bighorn po, with reagrds sa TPS actually nakuhaan ko pa ng volatge reading yung TPS ng bighorn ko bago nag ka problema. and reading after autoshifting prblem was encountered

    *** TPS Previous reading [ignition ON] measure voltage across tps middle terminal and chassis ground

    TPS at idle = 0.34V [ good, nag autoshift during driving]
    TPS reading kapag todo tapak sa accelerator = almost 5.0V

    ======

    *** TPS current reading after autoshifting problem

    TPS at idle = 0.035V
    TPS at todo apak ng accelerator = 0.5V


    Funny thing is that almost the same figure ang reading, yun nga lang may 0.0V sa na nauna....



    ** by the way, nag pa underwash pala akobago ko na ramdaman ang problema ... related kaya sa pa underwask ko kaya nasira?



    Sir Jarhead, thank you po sa response, pero sana hindi trans. nagagamit ko pa naman yung bighorn, sa umpisa i shift ko sya sa "2" or"L" the kapag nas 40 na ang speed ko i shift ko na sya sa "D" .. oka naman ang takbo nakaka 120 pa.. kaso wala naman autoshifting ...waaaHHH!!!!


    Sir Dennis Powell, if ever shifting valve ang problema, saan po kaya ako pwede mag pagawa, meron ba dyan sa banawe?


    nakaapekto din kaya yung additive na nilagay ko sa ATF ko?


    sya nga pala, ipinababa ko na sa manila yung ride ko, na check daw kanina sa isuzu cavite.. they will try to check the trans pressure sa monday.

    sir salamat po ulit sa iputs, more inputs please

    P.S. may nag sabi sa akin sa BALTAC daw sa may banawe, saan yun?

  15. Join Date
    Apr 2007
    Posts
    23
    #15
    [SIZE=3]>>> Sir Yourman, thank you for sharing your experience, I’ll include that in my plan kapag no choice na.. sayang kasi yung sasakyan ko kung hindi maaayos, 3 door sya ang ganda pa ng tindig kahit 1992, parang isuzu pajero hehehehe.. pero kung 45K ang I shell out ko medyo masakit sa bulsa. Pag iipunan ko muna….thanks po ulit[/SIZE]



    [SIZE=3][quote=nap123;860405]Ah okay no problem bro. I just copy and paste this na save ko kasi sa mga notes ko.[/SIZE]

    [SIZE=3]HOPE THIS WILL BE OF SOME HELP AS THE DETAILS ARE FROM A MANUAL .. [/SIZE]

    [SIZE=3]THE TPS SENSOR IS A POTENTIOMETER WITH ONE END CONNECTED TO 5 VOLTS FROM THE ECM AND THE OTHER TO GROUND,A THIRD WIRE IS CONNECTED TO THE ECM TO MEASURE THE VOLTS FROM THE TPS AS THE THROTTLE IS MOVED THE VOLTS CHANGE..WHEN THROTTLE IS CLOSED THE OUTPUT AT THE TPS IS APPROX. (.5volts)AS THROTTLE OPENS THE OUTPUT INCREASES SO WIDE OPEN THROTTLE IS APPROX. (4.5volts) [/SIZE]

    [SIZE=3]testing.. [/SIZE]

    [SIZE=3]IF YOU ARE LOOKING AT THE SENSOR SO THE WIRES ARE ON THE LEFT (A)IS AT THE BOTTOM +5REF [/SIZE]
    [SIZE=3](B)IS IN THE MIDDLE GROUND [/SIZE]
    [SIZE=3](C)IS AT THE TOP AND IS THE TPS SIGNAL [/SIZE]

    [SIZE=3]1)backprobe with a high impedance voltmeter at the outside TPS terminals (A+B) [/SIZE]
    [SIZE=3]2)with the key ON and engine off,the voltmeter reading should be approx 5.0 volts [/SIZE]
    [SIZE=3]>>>>measured voltage was 0.65 V lang, [before was 5V ang na me measure kong supply][/SIZE]


    [SIZE=3]3)if the voltage was not as specified,either the wiring to the TPS or the ECM may be faulty.correct any faults [/SIZE]

    [SIZE=3]>>> Sir ni check ko yung ECM, ito ba yung nasa ilalim ng control panel sa likod ng gear stick? .. dalawang yung nakita ko ng control module [im not sure kung pareho silang ECM], magkahiwalay sila and both have voltage supply and functioning…alin kaya doon? Aarrgghh!!! [/SIZE]

    [SIZE=3]>>> Meron bang fuse for supply ECM?. Kung meron saan ko makikita?[/SIZE]

    [SIZE=3]4)backprobe with voltmeter, center and lower terminals(C+B) [/SIZE]
    [SIZE=3]5)with the key ON engine off and throttle closed,the TPS voltage should be approx 0.5-1.2 volts [/SIZE]

    [SIZE=3]>>> measured voltage was 0.035 [well I can adjust it manually by moving the TPS pero hangang 0.085 lang. [malayo pa rin sa required specs][/SIZE]

    [SIZE=3]6)verify that the TPS voltage increases or decreases smoothly as the throttle is opened or closed.make sure to open and close the throttle very slowly in order to detect any abnormalities in the TPS voltage reading [/SIZE]


    [SIZE=3]>>> Verified ko na Sir, the TPS voltage increases or decreases smoothly as the throttle is opened or closed. I also checked the resistance of TPS at open and closed throttle… Okay naman may response sya, at hindi erratic ang reading.[/SIZE]


    [SIZE=3]7)if the voltage is not as specified,replace the sensor [/SIZE]


    [SIZE=3]Bro most 3.1D auto trans TPS ang nagin problema kaya test mo muna. Maaring iadvise ng mga mekaniko na overhaul yan tapos papalitan lang nila ng TPS syempre okay na ang TRANSMISSION mo, Im not saying na yun ang ginawa sa iba posible rin na talagang sira na ang transmission talaga. since sabi mo naman na drive mo sya sa tingin ko TPS ang problema mo. I encountered yan problem na erratic ang shifting ng bighorn ko noong nagalaw ko TPS bigla nalang nagdownshift. Check mo muna sa ibang mekaniko hindi biro ang 45K na gagastusin mo. [/SIZE]


    [SIZE=3]>>> OO nga Sir, medyo mabigat kasi para sakin yung 45K, pero thanks na din kay Sir Yourman [ Sir thank you !!!] for sharing what you did to fixed your trans.[/SIZE]

    [SIZE=3]>>> strong naman background ko sa electrical and electronics, kaya I try ko muna pigain yung electrical side, ang problema lang medyo matagal kasi wala akong schematic diagram ng 1992 Bhorn. Feel ko nga Sir baka yung nag cocontrol na signal for solenoid ng autoshifting ang nawawala, isa na nga dito yung TPS pero syempre pwede din ang trans na mismo ang may problem [/SIZE]

    [SIZE=3]>>> maganda kasi ang hatak pa ng Bhorn ko, meron din nag sabi [I forgot yung website] default setting daw ang 4th gear ng trans kapag non functioning na ang mga shift solenoid sa loob ng trans, kaya pag hindi gumagana ang auto shifting, pwede pa I mano mano..tipong shift to “L” or “2” muna then “D”, pero hindi daw gagana ang EGR kaya medyo mausok, at less power sa arangkada.[/SIZE]

    [SIZE=3]>>> kung wala akong masukat na supply voltage for TPS, I agree pwede ang wiring, fuse [kung meron], relay [kung meron], or ECM mismo ang problem..[/SIZE]


    [SIZE=3]>>> Tanong ko sana Sir Naps, nakakabili ba ng ECM dito sa atin? ..saan kaya ako makakabili? Baka makamura ako ng gastos[/SIZE]

    [SIZE=3]>>> Bukas dadalhinsa Isuzu cavite, I check nila yung pressure ng trans. I update ko kayo..[/SIZE]

    [SIZE=3]>>> Thanks ulit, sa knowledge sharing ….[/SIZE]

  16. Join Date
    Apr 2007
    Posts
    23
    #16
    Bro Ramon, thank you ng madami, sana maayos tsikot ko

  17. Join Date
    Jul 2003
    Posts
    590
    #17
    Yung EGR pala ng bighorn pwedeng takpan mo, gaganda hatak ng bighorn mo. Most bighorn owner sa UK tinakpan nila ang daming positive feedback isa na ako don 2 years ko ng tinakpan ang EGR.

    With regard sa ECM try contact Joseph Atutobo AKA pajero expert. Nabanggit niya sa akin na may alam siya na pagkukunan ng mga parts ng bighorn at pajero sa subic ata. He can also help you a lot. Kung malaki background mo sa electrical I believe you can solve the problem. Try search sa internet re trans AW 30-40LE transmission. Also volvo and pajero used that transmission ang daming topic regarding that. Just pm me if you need my help I gave you my no.



    [QUOTE=ltx;860491][SIZE=3]>>> Sir Yourman, thank you for sharing your experience, I’ll include that in my plan kapag no choice na.. sayang kasi yung sasakyan ko kung hindi maaayos, 3 door sya ang ganda pa ng tindig kahit 1992, parang isuzu pajero hehehehe.. pero kung 45K ang I shell out ko medyo masakit sa bulsa. Pag iipunan ko muna….thanks po ulit[/SIZE]



    [SIZE=3]
    Quote Originally Posted by nap123 View Post
    Ah okay no problem bro. I just copy and paste this na save ko kasi sa mga notes ko.
    Quote Originally Posted by nap123 View Post
    [/SIZE]

    [SIZE=3]HOPE THIS WILL BE OF SOME HELP AS THE DETAILS ARE FROM A MANUAL .. [/SIZE]

    [SIZE=3]THE TPS SENSOR IS A POTENTIOMETER WITH ONE END CONNECTED TO 5 VOLTS FROM THE ECM AND THE OTHER TO GROUND,A THIRD WIRE IS CONNECTED TO THE ECM TO MEASURE THE VOLTS FROM THE TPS AS THE THROTTLE IS MOVED THE VOLTS CHANGE..WHEN THROTTLE IS CLOSED THE OUTPUT AT THE TPS IS APPROX. (.5volts)AS THROTTLE OPENS THE OUTPUT INCREASES SO WIDE OPEN THROTTLE IS APPROX. (4.5volts) [/SIZE]

    [SIZE=3]testing.. [/SIZE]

    [SIZE=3]IF YOU ARE LOOKING AT THE SENSOR SO THE WIRES ARE ON THE LEFT (A)IS AT THE BOTTOM +5REF [/SIZE]
    [SIZE=3](B)IS IN THE MIDDLE GROUND [/SIZE]
    [SIZE=3](C)IS AT THE TOP AND IS THE TPS SIGNAL [/SIZE]

    [SIZE=3]1)backprobe with a high impedance voltmeter at the outside TPS terminals (A+B) [/SIZE]
    [SIZE=3]2)with the key ON and engine off,the voltmeter reading should be approx 5.0 volts [/SIZE]
    [SIZE=3]>>>>measured voltage was 0.65 V lang, [before was 5V ang na me measure kong supply][/SIZE]


    [SIZE=3]3)if the voltage was not as specified,either the wiring to the TPS or the ECM may be faulty.correct any faults [/SIZE]

    [SIZE=3]>>> Sir ni check ko yung ECM, ito ba yung nasa ilalim ng control panel sa likod ng gear stick? .. dalawang yung nakita ko ng control module [im not sure kung pareho silang ECM], magkahiwalay sila and both have voltage supply and functioning…alin kaya doon? Aarrgghh!!! [/SIZE]

    [SIZE=3]>>> Meron bang fuse for supply ECM?. Kung meron saan ko makikita?[/SIZE]

    [SIZE=3]4)backprobe with voltmeter, center and lower terminals(C+B) [/SIZE]
    [SIZE=3]5)with the key ON engine off and throttle closed,the TPS voltage should be approx 0.5-1.2 volts [/SIZE]

    [SIZE=3]>>> measured voltage was 0.035 [well I can adjust it manually by moving the TPS pero hangang 0.085 lang. [malayo pa rin sa required specs][/SIZE]

    [SIZE=3]6)verify that the TPS voltage increases or decreases smoothly as the throttle is opened or closed.make sure to open and close the throttle very slowly in order to detect any abnormalities in the TPS voltage reading [/SIZE]


    [SIZE=3]>>> Verified ko na Sir, the TPS voltage increases or decreases smoothly as the throttle is opened or closed. I also checked the resistance of TPS at open and closed throttle… Okay naman may response sya, at hindi erratic ang reading.[/SIZE]


    [SIZE=3]7)if the voltage is not as specified,replace the sensor [/SIZE]


    [SIZE=3]Bro most 3.1D auto trans TPS ang nagin problema kaya test mo muna. Maaring iadvise ng mga mekaniko na overhaul yan tapos papalitan lang nila ng TPS syempre okay na ang TRANSMISSION mo, Im not saying na yun ang ginawa sa iba posible rin na talagang sira na ang transmission talaga. since sabi mo naman na drive mo sya sa tingin ko TPS ang problema mo. I encountered yan problem na erratic ang shifting ng bighorn ko noong nagalaw ko TPS bigla nalang nagdownshift. Check mo muna sa ibang mekaniko hindi biro ang 45K na gagastusin mo. [/SIZE]


    [SIZE=3]>>> OO nga Sir, medyo mabigat kasi para sakin yung 45K, pero thanks na din kay Sir Yourman [ Sir thank you !!!] for sharing what you did to fixed your trans.[/SIZE]

    [SIZE=3]>>> strong naman background ko sa electrical and electronics, kaya I try ko muna pigain yung electrical side, ang problema lang medyo matagal kasi wala akong schematic diagram ng 1992 Bhorn. Feel ko nga Sir baka yung nag cocontrol na signal for solenoid ng autoshifting ang nawawala, isa na nga dito yung TPS pero syempre pwede din ang trans na mismo ang may problem [/SIZE]

    [SIZE=3]>>> maganda kasi ang hatak pa ng Bhorn ko, meron din nag sabi [I forgot yung website] default setting daw ang 4th gear ng trans kapag non functioning na ang mga shift solenoid sa loob ng trans, kaya pag hindi gumagana ang auto shifting, pwede pa I mano mano..tipong shift to “L” or “2” muna then “D”, pero hindi daw gagana ang EGR kaya medyo mausok, at less power sa arangkada.[/SIZE]

    [SIZE=3]>>> kung wala akong masukat na supply voltage for TPS, I agree pwede ang wiring, fuse [kung meron], relay [kung meron], or ECM mismo ang problem..[/SIZE]


    [SIZE=3]>>> Tanong ko sana Sir Naps, nakakabili ba ng ECM dito sa atin? ..saan kaya ako makakabili? Baka makamura ako ng gastos[/SIZE]

    [SIZE=3]>>> Bukas dadalhinsa Isuzu cavite, I check nila yung pressure ng trans. I update ko kayo..[/SIZE]

    [SIZE=3]>>> Thanks ulit, sa knowledge sharing ….[/SIZE]

  18. Join Date
    Apr 2007
    Posts
    23
    #18
    Sir Naps, thank you sa quick response... sige ipunin ko muna lahat ng information regarding sa problem ko at yung mga nagawa ko na during isolation. then i post ko dito ..

    kapag naayos ko na problem ko sa Bhorn ko , ... i try kong takpan yung EGR.

    Okayi'll try to contact Sir Joseph B.


    regards to all ...thanks guys

  19. Join Date
    Apr 2007
    Posts
    23
    #19
    Guys,


    Here is my update.

    line pressure test was done to my Bhorn, the result was a disappointing "NO Pressure" present in my trans.

    ang advice ng Isuzu ay overhaul ng trans

    bigay nyang quote sakin ay:

    Overhaul = 30K
    Labor =10K

    plus additional payment kapag sira na ang nga solenoid and need to be changed.

  20. Join Date
    Sep 2004
    Posts
    2,975
    #20
    Bro, I don't own a Bighorn, but we share the same problem. In my Accord's case, naayos na.

    Hindi rin kasi nag-autoshift ang Accord ko. Nagbi-blink yung D4 indicator light, meaning may possible problem sa AT. I used to start off at 2 or L, tapos pag 50-60 kmh na ako, then shift sa D3 or D4. Pag akyatan, hindi ako umaandar pag D3 or D4, kahit mataas na yung rev ko, kailangan talaga nasa 2 or L. It's annoying, kasi parang hindi tuloy matic.

    So I went to Baltak and AT Master (Visayas Ave). They made a cursory examination and testing, less than 5 minutes, tapos ang recommendation agad, overhaul, and quoted me a whopping 32k. Yung surplus sa Baltak, 20k plus 3.5k ata for labor.

    Eh wala pa akong pera, so pinabayaan ko muna. Nung nagka-problema starter solenoid ko, pinaayos ko sa talyer malapit sa work. Sa Accord kasi, masikip ang engine bay, and for you to access the starter assembly, marami kang babaklasin. Nung binalik nila, aba, hindi na nagbi-blink yung D4. Ok na, nag-auto shift na siya. So tinanong ko yung mekaniko kung ano ginawa niya. Sabi nya wala naman daw, binalik nya lang yung mga piyesa at hinigpitan yung mga wires.

    Baka may TCM (Throttle Control Module) yung Bighorn, and you can jump the connectors para magbato ng error code. Or try mo ulit check yung sockets ng wiring, disconnect and reconnect mo ulit. Ok pa naman kasi hatak kamo, hindi rin lang nag-aautoshift.

    My experience kasi really made me distrust yung mga shops na gusto agad palitan or overhaul. I saved a lot of money, until now OK pa rin tranny ko.

    Sensya na, mahaba, pero baka makatulong.

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Isuzu 3.1D Autoshifting problem