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Crank Angle Sensor

beastien

By beastien,
in Four Door Family & Wagoneers

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beastien Proficient

beastien

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Wondering if anyone knows if this is normal, I've tested the voltage outputs from my CAS and have found something that may be a problem.

The signal from the 1degree output is around 2.4 volts and sits quite steady at idle. But the 120degree signal seems very erratic, jumping between 0.9 to 1.6volts at idle.

Is this normal, or is my CAS U/S?

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beastien Proficient

beastien

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Well with a bit of research I found the CAS test section in the stagea service manual

It says the 120 degree signal should be between 1.3v to 1.4v at idle, and I imagine it should be a reasonably steady reading aswell.

So it's looking as though mine is playing up.

Please sit down before reading this part.

A new item is worth $1042 from Nissan, what a joke that is.

beastien Proficient

beastien

Posted
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Oh if anyone is kind enough, maybe they could test the voltage on their CAS so I can compare with mine.

I can supply ECU pin numbers, wire colours etc if needed.

I wanna know 100% for sure.

Terminal Grand Master

Terminal

Posted
Posted

Let's just hope mine isn't playing up as well. I've been getting quite bad fuel consumption lately, and I've yet to pinpoint the problem due to my g/f's car being out of action. I'll let you know when she won't be using the car and you can go around and pull mine apart :laugh:

beastien Proficient

beastien

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Let's just hope mine isn't playing up as well. I've been getting quite bad fuel consumption lately, and I've yet to pinpoint the problem due to my g/f's car being out of action. I'll let you know when she won't be using the car and you can go around and pull mine apart :laugh:

Cheers mate, only have to get to the ecu plug, to take a voltage reading.

66yostagea Grand Master

66yostagea

Posted
Posted
Cheers mate, only have to get to the ecu plug, to take a voltage reading.

DATS interesting Brendan. Now my shoulder is getting better I am going to try and solve my P. poor fuel consumption, so this could be an area to check.

beastien Proficient

beastien

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It is quite interesting, I'm finding, I've realised it's much easier to find a problem with the right gear and a full service manual.

Talking about the right gear, i'm lucky enough to be able to borrow the ocilliscope from work, so I'll diagnose this sucker once and for all.

beastien Proficient

beastien

Posted
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Ok, I've tested the output with the ocilliscope, and it looks fine compared to the service manual. Back to the drawing board.

One thing I noticed yesterday before I started it the voltage from the MAF was 0.9 volts, manual says 0.2 volts.

Didn't test it until after it was started today, and the voltage looked fine. Will have to test again tomorrow before startup.

This is really getting annoying.

beastien Proficient

beastien

Posted
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Wont need to now, thanks for the offer though mate, much appreciated.

Working afternoon shift aswell, till 11pm, so wouldn't be able to make it.

I'm reasonably satisfied that the CAS is ok now, I'm looking at the MAF sensor now, will hopefully have an answer tomorrow.

I've been searching the forum, and it seems as though the issue i'm having is very common. And no one seems to have a definate answer.

So I'll keep prodding away, and will hopefully find something.

Sydneykid Grand Master

Sydneykid

Posted
Posted

The CAS produces a pulsing signal when the engine is running, the 1 degree is stable because it is more frequent, hence the multimeter reading doesn't vary much. The 120 degree signal is less frequent hence the multimeter reading does vary.

As far as I know you can't check CAS operation with a multimeter at idle. The 120 degree signal should stabilse as the rpm rises. So maybe try it at higher rpm, that's where you should/might get the Nissan manual voltages.

;) Cheers :sleep:

Duncan Grand Master

Duncan

Posted
Posted

hmm I had a CAS fail years ago on my r33, it was a real pain to track down, one of the most intermittent missfires I've ever seen.

Ended up paying around 400 for a second hand one - I almost had a heart attack at the nissan price....

Do you have a consult cable? You can get a reading off most of your sensors and make sure they are acting OK while you are driving

  • 1 month later...
ssshonky Grand Master

ssshonky

Posted
Posted (edited)

guys and gals

didnt want to create a new thread to ask the question .. so found some talk of consult ports in here

can anyone send me / describe the consult port on a 2000 Stagea?

I have a consult cable that I used on my old pulsar and wondering if the pin outs etc are the same?

I have calumsult and nissan datascan etc. IT would be great if the consult cable can be used on the stagea too.

( ps I dont actually HAVE the car yet hence why I cant just try it out. Thanks guys.

Edited by ssshonky
captinsane Community Regular

captinsane

Posted
Posted
guys and gals

didnt want to create a new thread to ask the question .. so found some talk of consult ports in here

can anyone send me / describe the consult port on a 2000 Stagea?

I have a consult cable that I used on my old pulsar and wondering if the pin outs etc are the same?

I have calumsult and nissan datascan etc. IT would be great if the consult cable can be used on the stagea too.

( ps I dont actually HAVE the car yet hence why I cant just try it out. Thanks guys.

my 99 s1 (late model) stagea has a 14pin consult connector

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