Car Voltometer?

[dhisky]

Is this normal?

Pag mga 1 day ko di ginagamit oto and unang pihit ng susi to turn on the engine ayaw, laging sa second try pumapasok. Akala ko tuloy lagi ubos na battery.

Voltomete showing

12.4 engine off
14.6 engine on

nangyayari lang pag matagal di binubuksan makina.

Battery is 1 year and 8 months pa lang.

Update ko lang ito.

Battery 1 year and 10 months (tumagal pa ng 2 months).

Sobrang hirap na talaga mag start mga nakaka 5 pihit ako ng susi bago bumukas engine.

Car voltometer from Lazada showing that the battery is normal (12+ engine off, 14+ engine on).

Pumunta na ako mekanino kasi baka iba sira, they check the battery with battery tester ba yun? Sa kanila ang reading 10+ na lang pag engine off and told me na mag palit na ng battery. Di ako nasa satisfy and punta ulit iba naman mekaniko, same reading, same recommendation, palit batt na talaga.

Does it mean hindi reliable itong mga car voltometer na ito?

[jick.cejoco]

Just the battery voltage alone is not a reliable measure of battery capacity.
Compare the battery to a low level water tank, even with good pressure ( from the pump), it cannot SUSTAIN the electrical load. The voltage is the electrical pressure, the ability to sustain (current) is the amount of water in the tank.

What I have been doing is loading the battery while checking the voltage. A simple way to do this is to disable fuel delivery and crank the engine a few seconds while observing the battery voltage. If the voltage drops below 11 volts while cranking, change the battery and repeat the test. If the voltage still falls below 11 volts, replace the battery.

[Archerfish]

Just the battery voltage alone is not a reliable measure of battery capacity.
Compare the battery to a low level water tank, even with good pressure ( from the pump), it cannot SUSTAIN the electrical load. The voltage is the electrical pressure, the ability to sustain (current) is the amount of water in the tank.

What I have been doing is loading the battery while checking the voltage. A simple way to do this is to disable fuel delivery and crank the engine a few seconds while observing the battery voltage. If the voltage drops below 11 volts while cranking, change the battery and repeat the test. If the voltage still falls below 11 volts, replace the battery.

Will this kind of test do good for newer cars? From what I understand, you disable the fuel pump by removing the fuse. Is that right? For cars equipped with PCM and with almost all controls relying to computer, will it not give you code error once you disabled your fuel pump?

From what I've read, you can do your own battery voltmeter by connecting two series resistors and parallel it to one resistor. That series parallel resistors should serve as your probe as you connect it to your multimeter. I haven't tried it so I can't remember the values of resistors.

[jick.cejoco]

Will this kind of test do good for newer cars? From what I understand, you disable the fuel pump by removing the fuse. Is that right? For cars equipped with PCM and with almost all controls relying to computer, will it not give you code error once you disabled your fuel pump?

From what I've read, you can do your own battery voltmeter by connecting two series resistors and parallel it to one resistor. That series parallel resistors should serve as your probe as you connect it to your multimeter. I haven't tried it so I can't remember the values of resistors.

I have used this procedure on MY 2018 cars without adverse effects. Or, if you don't feel comfortable with this concept, remove the ECU fuse while load testing the battery. Or, bypass the starting circuit with the ignition switch off and crank the engine while observing the voltage. Whichever applies to your car, that's what you use.

[jick.cejoco]

Any shops out there with this or equivalent?






Google Image Result for https://i.ytimg.com/vi/LriNo7PwwoM/hqdefault.jpg

[Archerfish]

Any shops out there with this or equivalent?






Google Image Result for https://i.ytimg.com/vi/LriNo7PwwoM/hqdefault.jpg

It's a blank page...

EDIT: Sorry, the page won't load for a long time. Now I see it.

[dr. d]

A simple way to do this is to disable fuel delivery and crank the engine a few seconds while observing the battery voltage. If the voltage drops below 11 volts while cranking, change the battery and repeat the test. If the voltage still falls below 11 volts, replace the battery.

...this seems... "wrong"...?

[robot.sonic]

I suggest na instead of voltmeter yung elm327 na obd2 scanner na lang. for less than 500 sa lazada mas madaming has info na nakukuha. May ganon ako dati sa jazz kaso binigay ko kay mel casaba.

Bumili ako ng bagong elm327 kaso napansin ko na pag matagal nang nakasaksak sa obd2 port ay nagkaka check engine ako. Happened twice. Nung di ko na kinabit ay di na umulit. Baka nakaka interrupt sa communication system ng oto.

[jick.cejoco]

...this seems... "wrong"...?

Gomen nasai neh!


It's supposed to read " charge the battery and retest"

[dr. d]

Gomen nasai neh!


It's supposed to read " charge the battery and retest"

ah ok!

btw, high output chargers that are capable of starting the engine, are hideously expensive here.

[Archerfish]

Gomen nasai neh!


It's supposed to read " charge the battery and retest"

You guys are amazing... the first time I read it, it "sounded wrong" to me but I couldn't figure it out.

Regarding the multimeter, that seems old school and I think it I saw that one in a very old video tutorial. I might be wrong...

[dr. d]

Regarding the multimeter, that seems old school and I think it I saw that one in a very old video tutorial. I might be wrong...

the friendly motolite outlet i go to, has one. they routinely use it when i drive over for battery replacement.
i suppose all their branches have one...

[Archerfish]

Bumili ako ng bagong elm327 kaso napansin ko na pag matagal nang nakasaksak sa obd2 port ay nagkaka check engine ako. Happened twice. Nung di ko na kinabit ay di na umulit. Baka nakaka interrupt sa communication system ng oto.

This is a good update. So it's better to use a voltmeter or perhaps get an "expensive" scanner.

[RaGa]

This happened to me last Dec.2017, voltmeter reading 12.5 (engine off) and 14.1 (engine running).
Pansin ko hirap na mag-start sa umaga, what i did was the old school way of testing the battery., which is turn-on the headlight, crank the engine.
Eh nag-blink na yung headlight ko, so ayun napabili ako ng battery ng wala sa oras. Sabi ko nalang sulit na rin battery ko which is almost 2.5 years na din.

[Archerfish]

This happened to me last Dec.2017, voltmeter reading 12.5 (engine off) and 14.1 (engine running).
Pansin ko hirap na mag-start sa umaga, what i did was the old school way of testing the battery., which is turn-on the headlight, crank the engine.
Eh nag-blink na yung headlight ko, so ayun napabili ako ng battery ng wala sa oras. Sabi ko nalang sulit na rin battery ko which is almost 2.5 years na din.

This works for models that allows you to turn on the lights with the engine off. For some models, you won't be able to turn on the headlight if the engine is off.

[RaGa]

This works for models that allows you to turn on the lights with the engine off. For some models, you won't be able to turn on the headlight if the engine is off.

I agree

[Walter]

This works for models that allows you to turn on the lights with the engine off. For some models, you won't be able to turn on the headlight if the engine is off.

Maybe one can turn on engine ... turn on headlight ... turn off engine ... then restart after a minute or so ...

[dhisky]

What if sira starter, can you still jump start it? If not, any other way para ma on engine?

[Walter]

Push start ... literally ... only if it's a manual transmission ...

[dr. d]

What if sira starter, can you still jump start it? If not, any other way para ma on engine?

if the battery still has some power left in it, but not enough to turn a starter, and your car is MT,
you might still be able to start it, even if you do not charge the battery.
"push-start", as stock says.
we were doing it on a regular basis, years ago, when we couldn't afford a new battery.