Mitsubishi Galant v6, problem. Help required

[Hassan1991]

Don't quit Sir.

[Hassan1991]

Have you feel any speed difference in auto and manual mood?
Thermostat is there. You're saying about air. Lets consider speed of fan is same, now same air goes in, in both mood. Difference is time limit of that air.
In direct mood temperature would be minimum at which thermostat operate.
In auto mood it would be a range of temperature like at which fan works and gets off. My point is there must be blockage in flow of coolant or fan speed in auto/manual mood which is making difference. What you are saying like car is designed for cold weather it not ture engineers would never test a machine in same weather condition.

[xenerking]

in my opinion, the internal operating temperature of engine remains between same range in different environments hot or cold, only the cooling system takes most of hit in case of hot weather working overtime..

i just noticed there is a heat sink sort of thing with aluminium fins, and to me it seems very dirty, try to clean it thoroughly, use the engine de greaser and also wash it properly so that it come back to original state white and shiny.

logic: i think this is connected to some sensor which relays AIR temperature readings to ECU and control FAN speed, being dirty its not transmitting correct temperature, hence fan stays at lower speed.

Just a hunch, maybe it can resolve ur issue...

[capsat]

am unable to zoom the 2nd picture.

If it is a plug type check for any broken wire at yellow marks ( black & blue ) and pull out to read numbers over it - you can find nearest equivalent of this item from ac scarp shops.

the grey plug is main signal & power - while the harnessed wires i marked in yellow is for radiator fan & pink is for condensor.

you can locate this fan control complete unit from scrap yards as well.

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[8502]

Yes there is huge difference in speed during auto and manual mode. In auto mode it does change speeds I mean low and high. There is no blockage in the radiator. The problem is ECU send signal to the module who send current to the fan motors when they are needed in low and high speed but they don't run fast enough to cool the radiator water while idle, problem doesn't exist during moving vehicle.

[8502]

There is no broken wires on both connections I mean condensor fan and radiator fan motors wires.

If you can please send me your number and I will send videos of the problem.

[8502]

Its not dirty it's grey colour is default.

[Hassan1991]

Does auto high speed is not equal to direct fan speed?

[8502]

ECU are always designed for engines for vehicle operating in cold weather countries the fans don't need to run fast to cool the coolant circulating in the radiator, wires connections everything was double checked. I think the ECU send signals to give power to the motors in low and high speed mode. For example in low speed it sends 3 Watts and high speed it send 6 watts. And that's not enough for hot climate, when using direct it get full current and runs fast at max and the problem is resolved. If the fan speed wasn't the problem why is it not overheating in direct mode and also on moving and on motorways it should get hot if there is blockage or any other fault while moving as well, on motorways there is much load on the engine so it should get hot. The problem is air flow needed for the engine it doesn't get enough from the fans so it's compensated form the natural air while moving but while idling it doesn't get any air additionaly so the problem start. Also on cold and rainy days there is no issues.

[8502]

No.

[8502]

Could it be that capacitor is missing ?? I mean it's a second hand car not new

[xenerking]

in this PIC, it looked nice and shiney:

and here it looks kinda not so clean:

[Hassan1991]

No ECU can't send power.
Module is doing that.
Ecu is just sending signal.
If direct fan speed is not equal to auto high speed then. Module unit can be your problem.
Ecu is sending signal to module that speed up the fan but module is not providing suitable current.
Again don't blame manufacturers.
And factory ECU's are not programmable. They are hard coded.

[8502]

Module was changed with 3 different ones from Bilal Ganj but no difference, new is not available. If the module is faulty it doesn't send current at all.

[Hassan1991]

Check voltages at high speed.

[8502]

Are you an electrician, where are you based.

[Marschall]

This is a Kabuli engine i presume????

[8502]

Hahahaha hahahaha hahahaha

[8502]

Please send me your number.

[Hassan1991]

Haha. Nope.
I'm a student of electrical engineering and a enthusiast. From Lahore.