camshaft sensor

[shelu]

sirs, i hope somebody will help me on this. namamatay ang makina ng sasakyan ko, minsan sa isang araw, 2x, minsan di naman, hindi. kaso, annoying dahil sa busina ng kasunod. dmax 2005, 4jh1, AT. kahit di naman nag CEL, pina scan ko. ang resulta, P1345-camshaft sensor. saan kaya pwede makabili nito maliban sa casa at magkano po kaya ang price range nito? ang advise po kasi ng shop, calibrate na siya at medyo may kamahalan ang signal, 65k. salamat po.

[StockEngine]

65k for a sensor? Who said that? Its just a sensor...

Baka 6.5k

[Mentis]

AFAIK pag sira ang camshaft sensor hindi mag-i-start ang engine mo, patuloy lang sya mag ka-crank pero hindi tutuloy ng engine run.
Now, kung nagagawa naman nya mai-start ang engine most probably hindi mismong sensor ang problem, baka sa wiring or harness wires. Maaring lose contact sya sa terminal, kaya naiinterupt ang sending nya ng analog (volt) signal sa ecm.
Pa-check mo muna sa electrician ang output ng mismong sensor then sa wires kung merong ac voltage output it usually have an output of .01~2vac upon cranking of engine. Hope this helps.

sent from my Nokia 3210i

[shelu]

65k for a sensor? Who said that? Its just a sensor...

Baka 6.5k

thanks sa reply sir. the 65k estimate is from betan calibration. they told me me that they have to calibrate the injection pump to replace the sensor as the sensor is in the injection pump. the 65k cost is for the sensor and the calibration.

[shelu]

AFAIK pag sira ang camshaft sensor hindi mag-i-start ang engine mo, patuloy lang sya mag ka-crank pero hindi tutuloy ng engine run.
Now, kung nagagawa naman nya mai-start ang engine most probably hindi mismong sensor ang problem, baka sa wiring or harness wires. Maaring lose contact sya sa terminal, kaya naiinterupt ang sending nya ng analog (volt) signal sa ecm.
Pa-check mo muna sa electrician ang output ng mismong sensor then sa wires kung merong ac voltage output it usually have an output of .01~2vac upon cranking of engine. Hope this helps.

sent from my Nokia 3210i

thank you so much for the reply sir. parang nakakahinga ako ng maluwag sa sinabi nyo po. 1 click lang pag start n umaga, andar agad. yong ng lang may mga araw na namamatay pero pag restart, andar naman agad. additional query sir, nakakabit ba talaga sa injection pump, gaya ng sinabi ng calibration shop, ang camshaft sensor?

[Mentis]

Literally, NO!...ang camshaft sensor ay nakakabit between flywheel and transmission.
Pero, the signal he send is what the ECM uses to control the opening and closing of electronic fuel injection (EFI) valves.
So, they are one complete circuit.
Mostly, hindi na iniintindi ng mga technician ang thorough check ng camshaft sensor pag yun ang lumitaw (P0335, P340) nirerekomenda na lang agad nila na palitan saka na lang nila hahanapin ulit ang problema kapag napalitan na ang sensor at ganun pa rin ang resulta. Kung hindi mo kayang i-DIY, makipag deal ka na lng sa auto shop muna na kung hindi ganun pa rin problema isusuli mo ang sensor (mostly pag electrical parts, no return policy nila) galingan mo na lng makiusap kung sakali.


sent from my Nokia 3210i

[shelu]

Literally, NO!...ang camshaft sensor ay nakakabit between flywheel and transmission.
Pero, the signal he send is what the ECM uses to control the opening and closing of electronic fuel injection (EFI) valves.
So, they are one complete circuit.
Mostly, hindi na iniintindi ng mga technician ang thorough check ng camshaft sensor pag yun ang lumitaw (P0335, P340) nirerekomenda na lang agad nila na palitan saka na lang nila hahanapin ulit ang problema kapag napalitan na ang sensor at ganun pa rin ang resulta. Kung hindi mo kayang i-DIY, makipag deal ka na lng sa auto shop muna na kung hindi ganun pa rin problema isusuli mo ang sensor (mostly pag electrical parts, no return policy nila) galingan mo na lng makiusap kung sakali.


sent from my Nokia 3210i

thank you so much sir.. hanap ako ng shop ngayon. salamat po talaga.

[jick.cejoco]

Mentis Mentis is offline
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May 7th, 2016, 10:32 AM #6
Literally, NO!...ang camshaft sensor ay nakakabit between flywheel and transmission.


this information is misleading.
the camshaft position sensor or CMP is either located at the end of the camshaft or integrated in the distributor or driven by the camshaft which turns half the speed of the distributor. it is never installed near or around the flywheel. the sensor around the vicinity of the flywheel or the snout of the crankshaft is the crankshaft position sensor or CMP

if this CMP is that of a hall effect type sensor (magnetic type) accumulates iron particles at the tip of the sensor and will display a rather "noisy" signal that confuses the PCM which will react by shutting the engine down or running erratically.


pull the sensor out first and clean the tip with paper towel and reinstall. if you have the capability of a digital storage oscilloscope, view the signal waveform before and after cleaning.


http://www.aa1car.com/library/crank_waveform.gif

[Mentis]

Mentis Mentis is offline
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Join Date
Aug 2015
Posts
215
May 7th, 2016, 10:32 AM #6
Literally, NO!...ang camshaft sensor ay nakakabit between flywheel and transmission.


this information is misleading.
the camshaft position sensor or CMP is either located at the end of the camshaft or integrated in the distributor or driven by the camshaft which turns half the speed of the distributor. it is never installed near or around the flywheel. the sensor around the vicinity of the flywheel or the snout of the crankshaft is the crankshaft position sensor or CMP

if this CMP is that of a hall effect type sensor (magnetic type) accumulates iron particles at the tip of the sensor and will display a rather "noisy" signal that confuses the PCM which will react by shutting the engine down or running erratically.


pull the sensor out first and clean the tip with paper towel and reinstall. if you have the capability of a digital storage oscilloscope, view the signal waveform before and after cleaning.


http://www.aa1car.com/library/crank_waveform.gif

If you were using Google, please look for the actual camshaft sensor location.
You were reffering a hall type sensor and I am with the magnetic type.
I am not misleading, its part of my job nature which is related to the sensors alike.
Google it and look for the actual images.



sent from my Nokia 3210i

[shelu]

mga masters, actually, i haven't brought my dmax yet to the shop as i was soliciting advises on what could the best action to be taken as the PhP 65K seems to be quite expensive. i cant take a hit and miss with that amount. the car is dmax 2005 model, AT. the problem is that it stalls sometime, even when it is running in the road. i had it scanned and the result is P1345 trouble code, camshaft sensor. the shop where i had it scanned told me that the injection pump needs to be calibrated for 65K. i went to the isuzu casa here in davao city last saturday and the sensor is only 2,495 pesos.. i went back to the shop who gave me the quotation and this only adds more confusion to me as im not a car guy, knew nothing. he told that the there are 2 camshaft sensors. the P1345 trouble is the camshaft sensor inside the injection pump, hence the cost.. as of now, for 4 days, di naman namamatay ang makina kaso di ako makabyahe ng malayo dahil baka bumigay ang sasakyan, bahay palengke lang ang route ko. mga masters, query ko lang,is it true that there are 2 camshaft sensors in dmax 2005?

[Mentis]

There are 2 sensor, involved in p1345. Camshaft position sensor (cmp) at Crankshaft position sensor (ckp).
Napa-check mo na ba ang wiring baka lose lang at yung mismong sensor? Bakit hindi mo dalhin sa ibang auto shop para magkaroon ka ng ibang opinion at matest nila ang mismong mga sensor, actually kung matyaga ka lang kaya mong i-DIY yang pagtetest basta may multi-meter ka lang.
At mas ok gumastos ng 5k+ para sa 2 sensor kesa sa 65k😂 agad agad tapos yung mismong sensor lang pala ang problema.
Anyway, 2nd 3rd opinions are better than one. Goodluck!

sent from my Nokia 3210i

[t2erns]

unfortunately some replies of this thread are not correct and mis leading. the 4JHI fuel system is a VP44 injection pump. betan is right, the cam sensor ay kasama sa injection pump, i don't know if you can buy it separately (maybe sa mga surplus pwede kand magtanong kung pagbibilhan ka). but first a trouble code does not indicate a failure of the sensor kaya sabi ng code ay circuit problem. and 1 thing ho for correction purposes lang (peace) camshaft position sensor ay not located sa may flywheel it's the ckp crankshaft position sensor. tip pag 2 wires inductive type pag 3 ay hall-effect type.

[niky]

unfortunately some replies of this thread are not correct and mis leading. the 4JHI fuel system is a VP44 injection pump. betan is right, the cam sensor ay kasama sa injection pump, i don't know if you can buy it separately (maybe sa mga surplus pwede kand magtanong kung pagbibilhan ka). but first a trouble code does not indicate a failure of the sensor kaya sabi ng code ay circuit problem. and 1 thing ho for correction purposes lang (peace) camshaft position sensor ay not located sa may flywheel it's the ckp crankshaft position sensor. tip pag 2 wires inductive type pag 3 ay hall-effect type.

Ergo, the 65k is for the replacement of the injection pump assembly as a whole plus calibration, then?

Makes more sense. In my experience, no sensor will cost anywhere near that much!

[t2erns]

yes i think yung quote sa kanya ay whole pump. kung cmp sensor ang problema maybe baka sakali may mabile, if ang camshaft tone wheel ang problema ay wala sigurong choice kundi palitan ang pump assy.

[miked]

If you were using Google, please look for the actual camshaft sensor location.
You were reffering a hall type sensor and I am with the magnetic type.
I am not misleading, its part of my job nature which is related to the sensors alike.
Google it and look for the actual images.



sent from my Nokia 3210i

onga kaso depende pa rin sa sasakyan kung anong klaseng sensor ang ginagamit. either the AC type (2 wires) or DC (3 wires).....

[miked]

There are 2 sensor, involved in p1345. Camshaft position sensor (cmp) at Crankshaft position sensor (ckp).

sent from my Nokia 3210i

saglit lang brader. hinay hinay laang.

ayon sa librong meron ako para sa isuzu 4ja1tc/4jh1tc e DTC P1335 (flash code 43) ay crankshaft sensor habang ang DTC P1345 (flash code 41) ay sa camshaft sensor......

a very short article regarding vp44s although still needs to be confirmed,

Bosch vp44 injection pump failures explained

[t2erns]

tulad nga ng pump failure explanation madali lang ma diagnose ito though you will need a scanner and oscilloscope. since nag iistart pa ang vehicle ay intermitent failure un code. by looking at the freeze frame makikita mo dun ang mga kundisyon kung kailan lumalabas ang dtc. example kung lumalabas ang code pag mainit na may chance nga na sa psg (pump module) circuit board baka nag oopen ang connections (solder) pag mainit na. sa scope naman makikita mo kung erratic ang signal ng cmp. syempre sa isang shop mas sure nga na magpalit ng pump kaso nga lang ay napakamahal.

[shelu]

thanks so much for the enlightenment. yes sir, the quotation of 65k is inclusive of the calibration of the pump. i am based in davao city and im still looking for shop to do the tests as suggested here. car is running but the anxiety is there. i cant take it for a long drive as it might just stall and wont start again. salamat mga masters. ill just update here once repairs are done.