Car Aircon Problem

[Janemar]

Yup.. Nakatago ung putol na wire sa may firewall eh saka thats the last thing on my mind. Additional learning for me.

BUT my point is, dont blame the tech. Some times, they just cant attend the needed seminar/lessons for new car aircon system and wala silang expensive diagnostic tools para makita ang AC sensor performance. Karamihan ng ac tech sa banawe is basic acu lang kaya at di na updated sa changes in new car acu software.

I salute them for being honest at least at I refer ka nila sa casa. In some techs, mag trial error yan at kung anu anu ang ipapapalit sa yo like compressor, etc, kahit they dont have a clue na yun talaga problem.

[rodetor]

Problem nowadays is high tech na mga oto. Incorporated na sa ECU ang A/C system. So yes, tama tech nya when it says dalhin sa casa since dun mababasa ang fault code or performance ng mga acu sensors.

Di na uso pressure switch na ijujump mo lang at aandar na compressor pag sira. Karamihan pressure sensor na gamit. Alam na ng ECU kung ilan ang actual pressure sa high side to smoothen out idle stability with A/C on and different ambient temps.

Pede rin na ung climate control.

Pede rin ung temp sensor sa evaporator.

Happened to me before, okay lahat ng ac hardware pero ayaw i command ni ACU mag ON. Suko lahat sa banawe. No CEL pero itried using my elcheapo obd2 scanner na rin pero alang mabasa na code.

Went to casa to diagnose and dun nakita ung code na p0532(ref low input.)

So balik ako banawe to change the refrigerant pressure sensor pero ganun pa rin ala pa rin ayaw pa rin mag ON. I then checked my wiring from ECU to ref sensor at dun ko nakita may putol kagat ng daga.. ;p

Ang ECU mo nasa engine compartmentl?

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[Janemar]

Ang ECU mo nasa engine compartmentl?

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Nope sir, nasa ilalim ng dash board. I dont have a wiring diagram for my car so i have to trace all 200+pinouts ng ECU connector to look for the ACU pressure signal wire. Nung walang tumunog sa tester, dun ko nalaman may break sa wire somewhere at saka nag hanap hanap.. hehe..

3 wire sya sensor ang acu press. +5vdc reference, ground and signal fire going to ecu.

[rodetor]

Nope sir, nasa ilalim ng dash board. I dont have a wiring diagram for my car so i have to trace all 200+pinouts ng ECU connector to look for the ACU pressure signal wire. Nung walang tumunog sa tester, dun ko nalaman may break sa wire somewhere at saka nag hanap hanap.. hehe..

3 wire sya sensor ang acu press. +5vdc reference, ground and signal fire going to ecu.

The +5v dc ref voltage is also same with the other sensors like the TPS and MAP. Good job on tracing your wires with a use of a multimeter tester.

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[kmvaliente]

Hi mga boss! natabunan kasi yung question ko earlier. Ask ko lang po magkano nag range ang replacement ng clutch assembly? Yun kasi findings ng honda eh sobrang mahal kapag sa kanila. For Honda Jazz 2009 po mga sir! Thank you!