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Thread: Hyundai Santro Engine Check Light Problem

  1. #1
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    Default Hyundai Santro Engine Check Light Problem

    My Hyundai Santro Plus 2002 Model, Is Original Petrol, no security system, nothing at all, simply original
    The Check engine Light is actually for.... to turn On for 2-3 seconds when we first start the ignition switch And then Wen off So that we may Start the Car.

    My Problem;

    Only At Morning
    When First Time I Switch my car's ignition switch On
    The Orange/Yellow Engine Check Light Does Not Turn On
    After few tries and waiting for long the Check light Turns On Itself

    What could be the problem ?

    One More important thing is
    once the check light is On
    then no matter how many times you switch Car On or Off
    The Check light Works Perfectly

    The problem is only at the morning on First Start
    Please Help !!!


  2. #61
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    May be its ECU soldering issue at its chips
    But lets wait for tomorrow morning

    The ECU as i told works fine te whole day but only makes problem when cool in the morning (after 18 hours sleep)

    So i don't think its very major fault in ECU........hein na?

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    Today Morning i started my car after 24 hours

    And believe me the car's check light turns in 0 zeros once i switch the ignition.

    (remember, i am having my mechanic's santro ECU in my car today)

    :/

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    Mechanic's car did Start at all today :p

    And My Car started like a rocket

    Hence Proved That it is ECU/ECM's fault

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    Can My Car's ECU/ECM be repaired again ?
    (Its Processor is already replaced 2 months ago, it worked fine for 2 months, but now the car doesn't start in the morning when cool (no check light turns On)
    It turns On after alot of wait and try) but works wonderfully for the whole day once started....
    Now the mechanic saying that There is a gap/hole on the paper where the Processor fits and it can't be repaired anymore.
    Is he true?

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    Sometimes what these geniuses do while 'repairing' is to take out the faulty IC altogether and put a lot of solder in its place. If thats been done then the ecu is screwed.

    I will still suggest you get your old ecu back into the car. And examine it to see if there are any weird wobbly connections.

    I'm still not sure here because when you guys moves the grip on the ecu, it did power on, didn't it? This points to a physically loose connection. It just need resoldering.

    Normally when loose solder joints are the suspect, what enthusiasts do is to put the ecu in a preheated oven (the oven at home which u use to bake stuff), for some small time period. It melts all the solder joints and once you remove it from the oven, all the solder cools down and renews all joints.

    So, what you need to do is find out if there are any loose joints. Ask your electrician to make sure the connector pins on the ecu are properly joined to the ecu PCB. Also tell him to resolder the connections to the processor chip he replaced.
    Selling Vitz+local cars - compatible bluetooth Ecu Scantool, High-amp car chargers, Apple-certified Lightning Cables, etc. Click on my name and see my started threads for details.

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    He said he already checked the Connectors and also re-solder the connections of the processor he replaced earlier
    Now what he is saying is that the place where the processor rests or fits, that base actually which he is calling a "paper" is actually damaged and it can not be repaired any more, he said the cost of repaired can be around 10k , still no guarantee.

    Now i am having his own car's ECU and it is working perfectly in my car
    Started my car after 24 hours and it worked fine

    He is offering me a deal, he is saying that there is a Man in Rawalpindi he knows,
    He take the old ECU's get some Good IC's from them and repair and re-assemble at his own
    He also take ECU's from accidented cars and imports ect ect.

    He is demanding 16 Thousand for an ECU
    but he is saying if you give me the old one, he can give the new one worth 11 thousand
    (not new actually)

    I asked from the Huyndai Showroom the Brand new is of 34 thousand
    And from Scrap market is 18-22-25 Thousand depending upon the condition and shop
    But no guarantee that it is repaired or not

    And all giving only check warranty

    ( I am trying to convince my mechanic if he buy from that Rawalpindi person from my money and use in his car and leave his one on my car )
    lets see if he agrees for this :/

    So, For 11 thousand should i get rid of my old ECU and take that one?

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    And About Moving the grip
    he said that when we move the grip that paper actually bends and allow the check light to turns On

    He said that the paper in The ECU have holes/gap
    which leaks something
    and no current pass through the relay
    So no check light

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    Hmmmmm .......

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    Well IF the PCB is multi-layered and IF its been damaged internally, then yes, nobody will be able to repair it.

    The deal you mentioned of taking his car's ecu and he can get a replacement is quite good lol

    Electrical components on a circuit board can develop a fault because of a number of reasons. However, a PCB cannot go faulty on its own. Physical faults in a PCB only arise if it is physically mishandled. Since the only person to take out the ecu and do anything to it is your electrician, then he is responsible for at least some portion of it. He should give you a significant discount since the earlier 'repair' has lead to more problems, and he charged you for it as well.
    Selling Vitz+local cars - compatible bluetooth Ecu Scantool, High-amp car chargers, Apple-certified Lightning Cables, etc. Click on my name and see my started threads for details.

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    Ok he buy the cars tosale later
    So i will try to make him agree that he take the replacement ECU and keep his one in my car
    Lets See :-)

    PCB means ?

    Ok this paper issue can be by electrician as he done something wrong while he replaced the processor?

    But what causes the processor to fries ?
    few months back

    Even 1 year before i had that check light problem
    and most people at that time also said that it is processor's fault

    Why this processor fault occurred actually?

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    .......

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    PCB is the circuit board of the ecu on which all components are soldered eg. resistors, capacitors, ICs (processor) etc...

    Electronic components develop faults due to a number of reasons.
    Selling Vitz+local cars - compatible bluetooth Ecu Scantool, High-amp car chargers, Apple-certified Lightning Cables, etc. Click on my name and see my started threads for details.

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    Hmmm Thanks

    But can this reason be bad wiring ?

    I am afraid k phir yeh problem nah ho jae
    So want to cure the real cause of this

    Because many people saying k agar ECU pay Water parr jae tab yeh masla hota
    but believe me no water at all
    never washed my engine area or inner of the car with water at all

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    santro plus is the shoe shaped one right?? - Its ECU is kind of fiddly the ignition switch powers up the ECU first which powers up the relay which then routes power to the ECU and sensors.

    This fault you mention is known to many people who repaired these cars, The problem is that the PCB loosens the solder at the connectors. Get a new one, and if you have high wattage headlamps or buzzing in the stereo (hi perf ignition cables) replace them with original parts.
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    Quote Originally Posted by Xulfiqar View Post
    santro plus is the shoe shaped one right?? - Its ECU is kind of fiddly the ignition switch powers up the ECU first which powers up the relay which then routes power to the ECU and sensors.

    This fault you mention is known to many people who repaired these cars, The problem is that the PCB loosens the solder at the connectors. Get a new one, and if you have high wattage headlamps or buzzing in the stereo (hi perf ignition cables) replace them with original parts.
    Yes It is the shoe shape one

    Everything is original in my car
    in fact All car is original , no repair or mechanical work done ever

    In Can not be repaired The PCB thing at the connectors ?

    Should i buy the new ECU ?
    34 thousand rupees

    Or get the one from the scrap market
    As mentioned above it is worth 22 thousand
    But my Mechanic has a friend and he is giving worth 11 Thousand but he will take my bad ECU with him
    (so not sure if the one he will give me, will be already repaired or not)

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    Ahsan Thanks Alot for All your help throughout

    It was ECU fault, and i think you are right its 2 months after i got my processor replaced in it
    Si i advice everyone never ever get your ECU repaired , just buy a new one
    I wastes 8500 on new processor, 500 on tuning, 500 Plus of daily checkup, Petrol elag zaya kiya aur tention elag
    And in the end I have to buy new ECU for my car

    Thanks God i got it in 11 thousand after giving the old one along
    but agar start mein lay laita to behtar tha, ab muje yeh 25 hazar ka par gya

    So Check Light Not Turning ON.....................Simply Change your Car's ECU/ECM

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    Bro, did you managed to get it checked from Hyundai service center, they will check it through computer and their charges are very nominal...

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    Got it checked by computer OBD2
    from my local mechanic twice but no error detected
    as once the car get started the ECU cures itself

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    ^^^glad to hear the problem got rectified.
    ''Peace is an unstable equilibrium,that can only be preserved by acknowledged supremacy and...equal power.'' ''We give up the fort when there is not a man left to defend it.''

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    hey bor nauman ... can you please tell me where may I find original spares of Santro club in Faisalabad

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