Abnormal operation of radiator fan

**jick.cejoco** · April 24th, 2015 06:54 PM

On killed in action aka KIA the radiator fan is controlled by the PCM through the coolant temperature sensor input. You can test this by grounding terminal 2 of the data link connector(BLK/GRN) wire or grounding terminal 86 of the radiator fan relay

**miked** · April 25th, 2015 11:30 AM

kung ako iyan ibbypass ko na pcm. hehe....marami namang source sa internet regarding the simple schematics of the fan

yan ang problema kapag may sariling utak ang sasakyan. hehehe

yun lang e mas madaling itroubleshoot provided may scanner ka.

**jick.cejoco** · April 25th, 2015 01:32 PM

Originally Posted by miked

kung ako iyan ibbypass ko na pcm. hehe....marami namang source sa internet regarding the simple schematics of the fan

yan ang problema kapag may sariling utak ang sasakyan. hehehe

yun lang e mas madaling itroubleshoot provided may scanner ka.

That's the problem. We immediately resort to nigger rigging or mcgyvering rather than doing the correct diagnosis and repair

**jvnj** · April 26th, 2015 11:08 AM

Masters,

Thank you very much for accommodating my queries, and sorry for my late reply as I've been busy these days and was unable to access Tsikot (the entire internet actually

). Anyways, to answer several questions above, yes, I already did a radiator overhaul (inside and out). Thermo switch has been replaced twice already, original and generic brand tested. Relays have been replaced also to Denso brand as the original exhibits abnormal heating. Wiring's along with the relays has also been checked and even conducted soldering to manual spliced connections. One thing I haven't tried is the grounding of the temp sender as what Sir Jick and Sir Zen has suggested. I was thinking before of directing my fan to the electrical source but very hesitant as this will wear my fan prematurely. Plus, the electrical load will reflect to additional fuel wastage. I will try you suggestions and will update this thread.

Thank you for your support, Masters!

**miked** · April 26th, 2015 04:28 PM

Originally Posted by jick.cejoco

That's the problem. We immediately resort to nigger rigging or mcgyvering rather than doing the correct diagnosis and repair

relax chief. alam ko namang mas lalong magiinarte ang makina once na binypass ang pcm.

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Originally Posted by jick.cejoco

That's the problem. We immediately resort to nigger rigging or mcgyvering rather than doing the correct diagnosis and repair

relax chief. alam ko namang mas lalong magiinarte ang makina once na binypass ang pcm.

**Je Jacaban** · June 25th, 2016 07:00 AM

Thermo switch ba may problema pag mahina umikot ang rad fan at aux fan? Ok nman yung fan pag naka unplug sa thermo switch. Ok din naman mga relay ko.

**dr. d** · June 25th, 2016 07:20 AM

Originally Posted by Je Jacaban

Thermo switch ba may problema pag mahina umikot ang rad fan at aux fan? Ok nman yung fan pag naka unplug sa thermo switch. Ok din naman mga relay ko.

ang sa pagka-intindi ko, ay on and off lang yang fans na yan. walang half-speed.
i-kumpara po nyo sa bagong unit ang lakas ng buga ng hangin, at baka makita nyong mahina na talaga yang fan nyo.

**Je Jacaban** · June 26th, 2016 12:52 AM

Originally Posted by dr. d

ang sa pagka-intindi ko, ay on and off lang yang fans na yan. walang half-speed.
i-kumpara po nyo sa bagong unit ang lakas ng buga ng hangin, at baka makita nyong mahina na talaga yang fan nyo.

pansin ko ho kasi pag mag on yung rad fan ko, normal speed. pero pag naka on na yung aircon mabagal na ang pag ikot ng rad fan ko, pati yung aux fan mabagal din. so habang umiikot yung dalaw, tinanggal ko yung plug sa thermo switch, ayun bumilis ang ikot at dinig mo yung whirring sound, pero pag ibabalik ko uli yung plug humihina uli pag ikot.

**rodetor** · June 26th, 2016 01:17 AM

Una, kapag binunot mo ang plug connector para sa thermo switch, dapat hindi aandar yan. Pangalawa, sa sinabi mo kapag mag sabay na umandar, humihina takbo ng fan pareho. May madagdag kapa sa koneksyon na electrical load sa maling pagkaka wire nyan, tiyak hihina pa ang andar ng parehong fan. Obserbasyon ko. May mali sa wiring, pati ang ginamit na gauge para sa wire.

Starmobile Up+

**glenn manikis** · June 26th, 2016 07:00 AM

Originally Posted by Je Jacaban

pansin ko ho kasi pag mag on yung rad fan ko, normal speed. pero pag naka on na yung aircon mabagal na ang pag ikot ng rad fan ko, pati yung aux fan mabagal din. so habang umiikot yung dalaw, tinanggal ko yung plug sa thermo switch, ayun bumilis ang ikot at dinig mo yung whirring sound, pero pag ibabalik ko uli yung plug humihina uli pag ikot.

Use seperate relay on each electrical device or motor.. ️Most probably yung Aircon blower or compressor mo sa relay din ng aux fan nakakabit kaya they share the same power.. It's just my opinion...