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Thread: Hyundai Santro Engine Check Light Problem

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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 !!!


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    your battery is weak. or perhaps the connections are loose.
    top documentaries " Tears of Gaza"

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    Battery is almost New

    I Took My Car to Mechanic + Electrician

    He opened my gear Box/Hand-break area Checked All the Connections From Relay
    Checked Fuse
    Checked battery Terminals
    Checked ECU wires
    Checked Sensors

    Everything was fine and perfect

    Actually the problem is as i said once it is started
    And remain well through out the day
    So in front of Mechanic It works 100% fine

    The thing which is causing this Engine Check Light problem is only at morning (cold)
    once the current goes to the ECU (the check light turns On)
    It never make problem again in that day

    Can't really find out the exact problem

    (Kabi Kabi Subah emergency mein kahein jana paray to Check Light he jaldi On nai hote.......So car he nai start hote phir)

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    Cars will start even if the check light doesn't light up. Just turn the key.

    However, if you experience a no-start condition even after turning key until the CEL lights up, then first things to check are ECU fuse (is it seated properly and not loose?) and the ECU relay (its coil might be near death).

    Check battery terminals are fastened properly, fix the ecu fuse and replace the ecu relay. These might solve your issues.
    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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    BEFORE
    When I move the key to ignition, all indicators turn on.
    The following indicators switch on EVERY time I turn the key to ignition:
    a) Engine oil pressure
    b) Battery/alternator
    c) Brakes
    d) Check engine

    BUT NOW
    All other Lights Turns On
    BUT
    The CHECK LIGHT Doesn't turn on at all
    So car does not get started

    Car Doesn't Start until the Check Light Turns On

    My Mechanic Checked The Relay , Coils ECU Connections with his tester
    And they were all perfect.

    He also checked The Battery and its terminals too
    Fuse are also tight and in working condition

    Moreover my mechanic said that
    Agar Battery ya Terminals ka Problem hota to har start mein problem karte car
    sirf subah k waqt nai
    Kyn k aik dafa din ko start kar k meine 9 hours car ko band rakha
    and again 9 hours baad On kiya to check light bilkul theek On hoe

    Weird Problem :/

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    Seems as if your santro sleeps very peacefully :p

    Have you tried the Pakistani totka? Banging on the dash around the meter etc when the light doesn't switch on. It might help to narrow down any loose connections in the cluster.

    I am still confident that it has something to do with a bad ecu relay. Once the relay heats up adequately, it might become operational. And when it cools down during the night, it goes back into its faulty state.
    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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    I tried exactly what you said many times :p

    Jab b Subah Check Light On Nai hote
    TO Dashboard k neechay
    agaay peechay bohy mukay marta hun

    Laiken har bar new jaga muka marnay say light On hote hay
    So still couldn't figure out k masla kahaan hai

    I bar bohat confident ho k mechanic k pas gya k iss wire to hilao to light On hote hay
    and i was embarrassed when he eplaied k they to Tape ki wire hay :/

    Kuch Months pehlay meine ECU mein processor replace karwaya tha
    But mechanic saying k ECU mein problem ho to car har start pay check light ka masla karay

    Problem he samaj nai aa rahe :/

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    If banging on the dash switches on the light (even though its a new position every time), then try to open up the odo cluster and have the wires accessible so when you switch on in the morning you can move the wires around and see if any specific wire makes a difference.

    Have you checked the connections with the ecu? Are any wires at the grips in a bad state? Are the grips seated properly?
    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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    My Mechanic Opened Up all the Gear and hand brake Area
    Checked Relay and every wire with his TESTER
    And he also checked ECU connectors
    Tightened them

    He checked the grip, point , fuse ect evrything

    The problem is the Check light remains wonderful after the morning start
    So Mechanic itni taawajo he nai daita
    Kyun k u k samnay sab perfect kaam kar raha hota

    Meine Mechanic ko 1 raat k leyai apni car b de
    But i think wo raat ko isko use karta raha
    aur next day Subah uss say sahe start ho gae
    So again laughed and said k koi masla nai hay apki car mein

    Usnay mje kaha k meine jo processor replace kiya tha uska tanka utra huwa tha
    wo meine lga diya hay , ab nai karay ge Check light problem

    So i brought my car back to home
    but next day same problem

    Check light 5-6 seconds k baad ON hoe hay

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    Well the only way left is to do those tests when you're in the thick of it.
    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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    Thinking to take my Car to the Hyundai Showroom (workshop)
    Will it help?

    I am worried because i heard that they are too expensive , even for checking they charge huge amount of fees
    and in the end they say k sab new daal lo

    May be they will say k Relay , Fuse , Grip , ECU sab new daal lo, theek ho jae ge :/

    What do you say?

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    Its your call. I think its an intermittent problem and can only be diagnosed in the morning.

    Tell you what, when in the morning the check light does switch on, dont start the car. Switch it back off and take out the key. Wait 10 mins and then put the the key back in to see whether the light behaves the same way it does at first key in the morning or otherwise.
    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 I will try this
    but i think it will do the same

    First time in morning Check Light apni marzi say he On hote hay
    Kabi 2-3 seconds baad to kabi 5 minute baad to kabi 4-5 ghantay ki mehnat k baad

    What do u say taking my car to Hyundai Showroom (workshop) is worth ? and will it help?
    Are they certified mechanics ?

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    The only option left to me is Hyundai Showroom (workshop)
    but confused that are they only good at charging money or even good at checking and pointing out the error (problem) in the car :/

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    Can Anyone Tell me

    Pehlay ignition Switch say Current Relay mein jata hay, us k baad ECU mein jata hay?
    I want to ask k agar ECU nah b lga ho to relay say Click ki awaaz aae ge On ignition ?

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    Ecu usually has two power sources. One is constant live to keep its memory alive. The other power source actually switches on when your ignition switch feeds power to the ECU relay. The relay in turn feeds power to the ecu.

    This is what I said about checking the relay. Check whether its giving any output the first time you turn the key in the morning. There should be no delay in turning the key and powering ON of the relay.
    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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    Actually when switch on the ignition key
    There is no sound of the Click from the relay (under the gear area)

    So i am thinking that Ahsan you are right
    may be the relay is expired now

    That's why i wanted to know that in-case there is problem in ECU, would the sound of Click still be heard from the Relay ?

    Because i have a doubt that my ECU is bad :/

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    Relay only supplies power to the ecu regardless of whether ecu is there or not, or working or not.

    You might not hear the click from under the dash/gear area. You should expose it and listen to it closely as soon as u turn the key first thing in the morning till the time the check light comes on. If its a late first click then relay = faulty.

    A relay isn't that expensive. Maybe around rs200 at most.
    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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    The Click Doesn't Come at all in the morning
    But I can hear that Click sound as soon as the Check light comes on

    So I have a doubt that no current reach the relay
    and it reaches after some try and some time

    So no current from Ignition switch to Relay

    May be bad relay or Bad Coil

    Some of my friends saying that may be my ignition switch is bad
    But All other lights (battery, breaks ect) comes On in the car means there is no problem of the switch
    What do you say ?

    I will insist my mechanic to change the relay
    actually he checks with his tester and say that it is perfect
    as the check lights works wonderful infront of him

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    Change the relay, if it doesnt solve ur problem the try resetting ur ECU... Remove the battery terminals for a minute and then put them back again.. That will reset the ECU and sometimes it works
    Body kits available for all cars...
    PM for details

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