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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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    Can any of the above mentione issues cause the morning check engine light problem ?

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    GEO SANTRO

    Main Relay R.S 1000/-

    But Still Didn't work for me

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    My Auto Electrician Saying k Current sab say pehlay ECM mein aata hay
    Aur phir ECM say Relay mein jata hay

    According to him Agar ECM nah laga ho car mein to Relay mein b koi Current nai aae ga

    Is he true?

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    1000rs for a relay???

    Did you check the grip and the power wires going to the ecu?
    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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    Yes it is Santro............Most expensive spare parts ((

    You know what
    Jitne ziada duration k leyai car khare rahay utnay ziada time k baad iski check light On hote hay

    I mean agar Car 1 raat khare rahay to next day iski check light 10-15 minutes maximum k baad start ho jae ge
    Laiken agar car 1 din complete khare rahay aur next day start karo (1 day gap) , to phir check light 1-2 ghantay ki mintoon k baad start hote hay (

    Battery k sath koi taluq to nai ?
    Kyun k jab aik dafa start ho jae to sara din theek rehte


    (1 thing more, kabi kabi car chaltay chaltay beech mein check light On hote hay (car band hote hay) Aur sath he light off ho k car start ho jate
    Like jhatka khate hay beech mein
    (very rare, but it happened to me twice) while i was driving at 80Kmph

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    Now thats some new piece of information. Should've mentioned it before.

    You earlier said you got your ecu repaired once? What was the fault?

    Out on a limb here, I'm guessing the ecu is at fault.
    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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    Once upon a Time , there was no Check Light at all
    I called my Mechanic to Come
    Usnay Car Direct ki aur shop pay lay gya
    Then he said there is smell from my ECU processor
    So the processor needs to be changed/ replaced
    I said ok

    He took R.S 8000/- for this
    (4-5 months back story)

    After that for 2-3 months The check light worked wonderful but now it started making like this

    My mechanic that said that he re checked the CU on his lab and it is perfect :/

    My Mechanic + Electrician (Owner of the workshop) is saying it is wiring problem but The Auto Electrician on his shop (worker) keeps on saying that it is ECU Fault nothing else
    I am trolled :/

    Owner saying that relay say ECM mein current jata hay
    But Electrician saying k ECM say Relay mein jata hay

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    Your first problem is your mechanic, change him instantly and goto hyundai 3s for proper diagnostic of the car, the amount you have paid for the repair is too much i guess, he's been ripping you off.
    The problem seems more like of the ECM itself then that of the relay...
    Try replacing the ecm of the car and then try, i know its difficult but do any friend or relatives of you has the same car???
    Sharing is caring....

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    My Mechanic has the same car

    Why not i give him the last chance on Saturday
    ( I ask him to change hi car's ECM with mine for 1 day and then see the results)

    Waiting For AHSAN's reply
    (may be you understand my car's problem now)

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    One more thing My mechanic asked me yesterday to try this;

    he said me to remove the battery's negative terminal for the whole night and then place it back in the morning when i want to start my car,
    i did the same
    but when i switch On the ignition the same happened check light didn't turn On
    but I just moved the switch (the crank moved) by engine (car) didn't start
    But at the same time the check light comes on (soon after i push the ignition to start)

    Is this giving any clue ?

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    Can ECU be repaired ? if it has problem just where the connectors fit in

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    Can anyone tell me k when we start the car to;

    ECU say Current Main Relay mein aata hay ?
    Ya Phir
    Main Relay say ECU mein jata ?

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    Ahsan Bhai ?

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    Since your problem is on a predictable pattern, and bumping around and the shaking of the engine does switch on the light, I would first focus on any loose connections at the level of ECU grip, the starter switch itself etc.

    And yes, if the owner of the workshop says one thing and the electrician there says the other, then I would def. stay away from them.
    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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    It is probably a simple issue. But one needs to examine it on their own if they can. Otherwise hyundai dealership may be your best bet. Just ask them to diagnose, not repair.
    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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    Few days back when my mechanic came to my home in the morning and switch On my car himself
    the gear lever box was already opened and the relay was naked infront of us
    We tap the tap , tap the dashboard , tap the grip/connectors but all failed
    Check light doesn't turn On

    He used her Tester to check the current in relay
    but there was No current at all

    Then he removed the under seat car's carpet to bring the ECU out
    Still no light

    As soon as he touch and tried to removed the 10 holes connector attached with ECU
    Suddenly the Check Light Comes

    He said k ECU mein current tha but relay tak nai aa raha tha , jis ki waja say check light On nai hote

    According to him the current first comes to ECU and then it moves to Relay
    (if no ECU..........no current in relay)

    Is it So in real ?

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    It may be such that the starter switch signal may be relayed to the power relay through the ECU's connections first.

    I suggest in the morning moving that grip/connector about. Try to see in which position relay clicks on and off.

    Examine the pins sticking out of the ecu where that connector attaches. See if any pins are bent or broken/ out of line.
    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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    And if you can remove the cover of the ecu and take a look at the circuit board then disconnect the ecu and with a rigid pin/needle or straightened paper clip try to see if any of the connector pins are soldered improperly (such that they may be moving about).

    If it has something to do with your ecu, and moving the grip actually solves the issue, then your mechanic who repaired the ecu in the first place should solve this issue for you because he is the one who messed about with your ecu. He should get it fixed.
    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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    Today I am On an experiment

    I changed my car's ECU with my mechanic's Santro

    Lets See if again tomorrow morning my car's check light turn on late

    If again the check light problem exist then there must be some wiring/connectors problem
    Else if it starts perfectly then surely my car's ECU is bad


    Can ECU be repaired agar uska koi tankaa utra ho ?
    Bilkul uss jaga say jahaan pay connectors lagtay hein wahaan koi masla ho to repair ho jata hay ECu
    ya phir New he laina paray ga ?

    Waisay lets see kal subah kya banta hay
    Now i have Santro 2007 ECU in my car

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    If any connection inside ecu is loose, its a 30 second solder job. Shouldn't cost anything either. Your electrician should solder it free of cost since hez the one who 'repaired' your ecu. If it isn't working now then it isn't exactly repaired is 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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