how to test cam angle sensor?

[1990BNR32]

my r34 won't start. the car previously had a r33 cam angle sensor in it, and i wanted to put it back to original so we put a BNIB (brand new in box) r34 cam angle sensor in it, and re-pinned the connector appropriately.

josh with RB who came out to put my motor in, said he believed the injectors weren't firing. we re-pinned the connector back to r33 and plugged in my friend's r33 sensor (modified wheel to run an AEM EMS) and even though it won't bolt up to my r34 tomei cam, he spun the sensor by hand while someone was cranking the motor and we could get the motor to at least backfire slightly.

this leads him to believe that my new r34 sensor is defective.

is there a way to test this?

[R32 Combat]

On the AEM, log the CAS output voltage. It should go 0-5v in a square wave.

[kismetcapitan]

would a poor man's solution be to use a multimeter and turn the CAS by hand? I am assuming that the sensor is either on or off based on position, one could turn it and see it read 0v and then 5v at the correct points?

[1990BNR32]

i should have been more clear, the r33 cas was from my friend's r33, his car is the one with the AEM EMS. I have a stock ecu and a hks fcon vpro.

[1990BNR32]

i am handy with a multimeter, just need to know what to measure and what to look for?

[hyrev]

The 33 and 34 CAS are different but you can use them interchangably, IIRC. In order to do that, you have to switch 2 wires around, which ones I do not know. Search on here to see which ones need to be switched back.

[hyrev]

Ok, this should be the solution you are looking for

tah-dah

[1990BNR32]

yes, thank you, i have spoken with sean and i am aware of how to re-pin the wiring plug to interchange the R33 and R34 sensors. I am not interested in running an R33 sensor since it will not bolt up to my Tomei R34 cams.

i was inquiring about whether there was a way to use a multimeter to test my r34 sensor.

[hpt_simon]

there is , i just did this 2 days ago

its in the r32 gtr manual, i have on cd, i supose you can get a pdf somwhere on the net.

cant remmeber the page,
if you can wait till tomroow, i will tell you the page.

you have to read the voltage coming out of the 1 o 120 degree pin , wich is pin 1 and 2 looking at the conector off the cas, its the 1rts and second from the left.

[hpt_simon]

hi,
back in ofice now

well its page en-206 on the r32gtr manual, i suppose its the same as the r34 except for the dirferent pin order.

the way to test:

with ignition switch on:
0V or aprox. 5V between terminal (2) and ground (1º signal)
0V or aprox. 5V between terminal (1) and ground (120º signal)
battery voltage (12...) between terminal (3) and ground (power)

when cranking engine:
2-3v between terminal (2) and ground (1º signal)
aprox. 0.5V between terminal (1) and ground (120º signal)
battery voltage (12...) between terminal (3) and ground (power)

and no need for test with idle , as it doesnt work right now :P

i just copy pasted this, so its same in the manual

hope this helps

simon

[1990BNR32]

you sir are the man.

[zbloke]

Just wondered if anyone knew if the R33 CAS voltages are the same as the R32?, reason I ask is;

On terminals 41 + 51, the 120º signal, I have a voltage fluctuating between 1.2v and 1.6v on idle and on page EN328 of the R33 Engine Manual it gives a figure of 1.3v for the same terminals on idle, however in the pin out section of the same manual, page EN433, it gives the expected voltage at the same terminals to be 0.3v >> 0.7v, same as the R32...........misprint on page EN328 in the R33 manual?

The other CAS signal on terminals 42 + 52, the 1º signal, is steady as a rock at 2.6v, the figure given on page EN328 of the R33 Engine Manual, (even though they have got the pin numbers wrong for this reading ) and this ties in with the information on page EN433, of 2v >> 3v on idle and the same info in the R32 manual.

Just want to be sure before I spend the best part of £300 on a new CAS

Cheers
Tim