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  1. Join Date
    Oct 2009
    Posts
    15
    #1
    baliktad pagka series ng battery now ayaw na mag start fuel injected ang engine possible ba computer box nasira it cranks but wont start pls help

  2. Join Date
    Jan 2009
    Posts
    6,452
    #2
    You mean the polarity was reversed? Oooohh.. you're likely screwed.

    Check the fuses that has anything to do with the ignition and fuel pump.

    Worst case, yes, you may have a dead ECM on your hands.

  3. Join Date
    Oct 2002
    Posts
    29,354
    #3
    Quote Originally Posted by oj88 View Post
    You mean the polarity was reversed? Oooohh.. you're likely screwed.

    Check the fuses that has anything to do with the ignition and fuel pump.

    Worst case, yes, you may have a dead ECM on your hands.
    I don't think the fuses would be affected.

    I really do think the engine ECU would be fried. Maybe the electronic ignition system as well (if the car is equipped with a separate unit from the ECU).

  4. Join Date
    Mar 2006
    Posts
    606
    #4
    thats the last thing you want to happen but it happened.

    best case scenario is you have a main fusible link blown .

    worst is yeah a fried ecm/pcm

  5. Join Date
    Dec 2005
    Posts
    39,174
    #5

    Malaki ang posibilidad na nasira ang electronic components ng sasakyan...

    Normally, may mga IC regulators sila to bring down the DCV from 12V to 5V/3V where most electronic parts operate. Sana regulators lang,- pero ganunpaman,- they're mounted on the PCB...

    11.1K:transform:

  6. Join Date
    Jan 2009
    Posts
    6,452
    #6
    Quote Originally Posted by ghosthunter View Post
    I don't think the fuses would be affected.

    I really do think the engine ECU would be fried. Maybe the electronic ignition system as well (if the car is equipped with a separate unit from the ECU).
    Some electronics with electrolytic capacitors at the input would appear "shorted" when the polarity is reversed. When that happens, there's still a possibility that the fuse was fast enough break the circuit before any permanent damage was done.

    Although slim, it's still a viable possibility.

  7. Join Date
    Jan 2010
    Posts
    767
    #7
    Guys correct me if I'm wrong. Diba ang connection is (+) of dead battery to (+) of good battery and (-) of good battery to (-) of dead battery. If I'm correct mali kasi ang term na ginagamit, dapat battery paralleling at hindi series baka kaya may mga nagkakamali. Ang series kasi is (+) to (-) connection.

  8. Join Date
    Feb 2008
    Posts
    5,179
    #8
    ^^ yun kasi usually term kung ginagamitan ng jumper cable yung dead batt. pero electrically speaking, tama yung sinabi mo.

    i hate to say this but i think majority of your electrical might be fried. hugutin na yung ECU and smell if its burnt. tapos pacheck na lang sa electrician.

  9. Join Date
    Oct 2009
    Posts
    15
    #9
    at first i checked the fusible links and fuses all of them are good , got my battery today after recharging it tried starting it and it started thank you god

  10. Join Date
    Jul 2009
    Posts
    10
    #10
    *Louie 18
    Definitely you're right. Noon ko pa nga kinokontra yung term na ginagamit dito sa atin sa Pinas eh, misleading kasi. When we say series connection...the resultant Emf (voltage or electro motive force) will be the sum of the individual Emf of the batteries... Battery 1= 12volts, Batt 2= 12volts. So, VT= V1 + V2, ang resulta Total Emf = 24volts. Eh sabog lahat ng electrical components ng sasakyan kapag series connection ang ginamit (for 12VDC system only). It should be called parallel, where as VT=V1=V2....so on and so forth. Sa parallel connection, the total emf is equal to the individual emf of the batteries, only the Total Current (I or amperes) is the sum of the individual current of the batteries, kaya lumalakas yung pwersa (initial torque) para i-crank yung cranking motor (starter) kapag ipinarallel yung dead battery sa good battery.

    SERIES CONN PARALLEL CONN
    VT= V1 + V2 + V3.... VT= V1 = V2 =V3.....
    IT = I1 =I2 = I3.... IT = I1 + I2 + I3....

    Kaya lang hindi na natin mababago yung nakasanayan ng mga pinoy eh kahit mali, yun ang natututunan eh. Minsan sinubukan ko gamitin yung term na parallel, tinawanan lang ako ng auto electrician, hindi nya kasi alam eh. But in fairness, alam nya yung gingawa nya, bad technically speaking, mali yung mga terms na ginagamit, hindi papasa sa industrial standards. Eh alangan makipagtalo pa ko at sabihin ko mechatronics engr ako, kaya hinayaan ko na lang. But if and when I talk to youngsters, itinatama ko para hindi sila ma mislead, kahit naman sa HS eh itinuturo yun.

    *ELO

    To sum up, if the connection was mistakenly reversed, I am afraid the Electronic Control Module (ECM) is already busted, UNLESS otherwise equipped with reverse current protector yung system mo, pero very rare ginagamit sa atuomotive yun, most often sa industrial applications lang ng engine nilalagay yun, especially sa planta. the best thing you should do eh ipacheck mo sa electrician na marunong magdiagnose ng ECM, wag sa ordinary electrician who only knows the old technology. ECM is a hightech process control device, it functions like a computer. So I suggest ipacheck mo agad ng hindi na lumaki ang damage if you try to start over and over with out giving remedy to the trouble.

    DIESEL_MAN

  11. Join Date
    Nov 2006
    Posts
    201
    #11
    sir modern car fusible links are reversible.it breaks down when it detects short circuit then re-program after couple of hours.but for sure your battery gets fries.subukan mo hiram muna ng maayos na battery and im sure andar ulit car mo...

  12. Join Date
    Nov 2006
    Posts
    201
    #12
    ooops sorry, me reply na pala TS sa post#9 na napaandar na niya. sorry di ko agad nabasa.

  13. Join Date
    Feb 2010
    Posts
    512
    #13
    Quote Originally Posted by elo View Post
    at first i checked the fusible links and fuses all of them are good , got my battery today after recharging it tried starting it and it started thank you god
    pa burger ka naman idol hehehehe!!

  14. Join Date
    Jul 2003
    Posts
    573
    #14
    kung i-compute mo ang output ng terminals na nabaligtad ang pagka-series,
    cancel out ang voltages, kanya = zero ang voltage na pumunta sa load.

    pero ang amperahe ng kuryente between the baterya eh equal sa short circuit
    ng 24 volts DC, ang taas nuon!
    Last edited by tip_tipid; November 7th, 2010 at 08:37 PM.

  15. Join Date
    Jan 2010
    Posts
    47
    #15
    nonsense to damage ecu /ecm/pcm due his action.


  16. Join Date
    Jul 2003
    Posts
    573
    #16
    Quote Originally Posted by billnomoney View Post
    nonsense to damage ecu /ecm/pcm due his action.

    Sir, bakit mo nasabi na nonsense?

  17. Join Date
    Jul 2010
    Posts
    570
    #17
    Most electronic devices w/ transistor or IC components will be damaged by reverse voltage polarity. Unless the Electronics Engineers anticipated this accident in our car and installed protection devices. Such as fuse,diodes, ic regulator or relay to disconnect circuit from the battery.

    I think the word "series" ang ginamit ng mga Pinoy Mechanic noon unang panahon. Kasi hirap sila bigkasin yun " parallel". He he he

  18. Join Date
    Jun 2008
    Posts
    449
    #18
    sir, if you think that the ECM is fried... better to bring it immediately to an auto electrical shop.. rather than trying anything else... happened to me before, a friends car, japanese surplus, we mistakenly installed the battery reverse... fried everything... cost us around 15K... toyota delica i think it was.... just my 2 cents...

  19. Join Date
    Apr 2008
    Posts
    51
    #19
    almost similar thing sa akin nagkabliktad instal ng battery ng Blade trinoma staff dati...ilang fuse sira and the main one ng vios na ang tagal nila nahanp nasa battery terminal pla...

    no damage to ECU and others...as in fuses lang talaga
    if you're familiar with car electronic devices (I used to do electronic repairs when I was a teenager) meron reverse polarity diodes mga yan na sila sasalo ng reversal plus inductors for noise reduction lalo na sa HUs

    These i saw even on the digital gauge of the vios matic...and some fried ECUs during the Ondoy aftermath

  20. Join Date
    Dec 2010
    Posts
    155
    #20
    Quote Originally Posted by Louie_18 View Post
    Guys correct me if I'm wrong. Diba ang connection is (+) of dead battery to (+) of good battery and (-) of good battery to (-) of dead battery. If I'm correct mali kasi ang term na ginagamit, dapat battery paralleling at hindi series baka kaya may mga nagkakamali. Ang series kasi is (+) to (-) connection.
    Parallel connections nga yun. I think the term "series" was from before when the car's electrical system was different, di na lang nabago and to jump-start a car, we still say "i-series", but despite of it, I'm sure the mechanic knew the correct connection which is POS to POS and NEG to NEG. Nalito lang siguro sa cables.
    Happened here at the shop on a RAV 4; the moment you try to connect the last wrong clip on the terminal, mag-spark na agad yun indicating that a wrong connection has been made. Main fuse lang near the POS terminal ang pumutok.

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baliktad pagka-series ng battery