Mitsubishi Galant v6, problem. Help required

[8502]

Also Zulfiqar SB the fans are not spinning after the shut off when auto. What does this singal you.

[HAshims]

0322 four 5 8 0 one one three
dha y block

[capsat]

fans will stop to halt when the Module cut off the signal.

And when ac is ON the condenser fan will remain spinning

[8502]

Condensor and radiator fans are connected together to the module. They don't run separately for your info.

[8502]

Zulfiqar SB I have checked few AC and fridge repair shop and they all have checked the blue wires on the fan motors it doesn't show any amps. Kindly advice which clamp meter is required for your readings.

The Electrition who said they are ok is out of town.

[Xulfiqar]

Did their clamps have a dca setting?

[8502]

Don't know about the details of dcm. Someone is arranging the equipment tomorrow so hopefully we will have results.

[SpeedDemon]

Cant this module be replicated? Isn't there any electrical / electronic engineer here who can provide the circuit design ?

If the ecu signal is PWM and the fans are 5 stage with 11 amps max, then 90% should be 10 amps approx with 5 increments of 2 amps each.

A multi-tool with oscilloscope function could read the pwm signal and understand how the ecu controls the unit.

I am sure the function of each input wire in the wiring clip can be figured out too, and Xulfiqar has already provided enough information.

I am no electronics Guru but just adding my 2 cents...

[Xulfiqar]

And that is exactly how i diagnose it.
Connect an oscope. Tap the signal wire, see what the hell the ecu is doing.

Simple as eating a sandwich

[8502]

Zulfiqar SB I found one radiator including fan shrouds and both motors with genuine module. The part is of a vr4 and runs perfectly. He is not selling the motors and module alone. Should I buy it I mean will it solve this low speed issue.

[Mirza967]

Check the module by connecting it ....if it works then buy the whole setup.......it will be useful to you if fan burns or radiator fails u have a spare one at home

[SER_GTR]

Seems Like Buying Whole Goat For 1kg Meat But if its the only option then go for it considering module is in working condition and works for you!

[Xulfiqar]

the fans and module for VR4 is the same as the GLS model (v6). - it works, you can try connecting it as is (whole assembly) to test.

[8502]

This is the piece. But how shall I test it I mean I have to install it first. Is there any way to test it before installing

[8502]

Also Zulfiqar SB if the previous module is not running fans properly on auto does it mean there is no problem with the ECU it is sending its signal to the module.
Then rest is module and fans motors who control the speed. I am asking this as this whole piece in the above picture is available without radiator. I mean fans, shroud, motors, fan blades. And if it doesn't spin fast what else could be the problem. I compared my car with other same model and there is difference in both low speed and high speed spinning. You can say that my car is running fans with 20% speed on low and with AC on it's like 50%. Even when the engine is hot and AC if off fans don't spin high they remain on low no matter where the needle is ( I never let the needle 1 cm above the center point, I always switch it off or direct fans to bring it down). If the car is not moving and needle has gone from its normal point the car need to be moving to keep it down as the fans remain on low speed, which makes its temp hot. High speed only works when ac is on. Without AC it always work low speed which is like 20% no matter where the temp is.

Please advice if there is problem with ECU as well. As I don't want to rectify another problem after this. I am changing motors and fans blades and module so there is no issue left.

[Xulfiqar]

as I mentioned before, do you have an actual two way scan tool that can work on this car?

You can then see if the coolant sensor is malfunctioning, or if the fan speeds are not being commanded at all.

I posted it way up.

[8502]

Coolant sensor is new. As I changed that while accessing. There is no 2way scan tool available here for this car. As you said before it's always the module or the fan motors, what I am asking is if the ECU is doing its job or not. The only problem is fan speed on auto rest there is no issue with the car or millage or working at all.

[8502]

You said earlier that the ECU will send a 3pwm signal to the module and then it's the module who controls the speed on desired temps. Or is it the ECU who is changing its signal according to the temp sensor readings.

[Xulfiqar]

the pwm signal from the ECU to the module is the command from the ECU to run the fan at whatever %age of signal its seeing.

e.g. to keep the fan off the ECU sends a 10% signal to the module, if all signal is lost the fans run direct at full power (failsafe) - this is the reason why new corolla will have the fan running at full speed with key on when the "trakker unit" cuts off power to the ECU. - exact same type of working here.

the module is just doing the heavy working, the fans are themselves PWM controlled - but they are higher amp hence controlled by the fan control module on the radiator. Its a very simple setup.

Most shops will have the mitsubishi scan tool, even the old launch X431 series of tools can do 2 way communications with this car.

reason to say this is because if the coolant sensor is not reading correct or the ac pressure sensor is not correct the ecu can never send the correct pwm command to the module. This can also be caused by an air bubble in the cyl head.

replacing the coolant sensor doesnt guarantee removal of airbubbles, i would recommend to stop throwing parts at it and get a correct diag done first.

[8502]

I couldn't find anyone who would do this scan everyone changed thermostat, tp sensor, coolant, radiator flush, service wiring checked, earth checks, but all in vein. Then I went to Electritions some said module, some said it's fine they will never go high speed, some said it's ECU is designed for cold climate. Now if I will change motors and module thing won't correct itself then its a loss. If you know anyone who can do this test on his number. Or else I think I will keep them direct what could go wrong, the car will gets to the optimal temp but a little later.