Resolved 2GNT Low voltage to cam and crank sensor

[safirenside]

My car died the other day while I was driving so I tested the supply voltage to cam and crank sensor and I was reading .72 volts. The cam is suppose to read around 12 volts and the crank around 9volts, also I can not connect to the obd2 on my lap top its says it has no power. Is my ecu bad?

 

[luv2rallye]

Actually for the 2g NT both CAS and CPS should read 8V on their yellow wires (coming from PCM pin 44 (ie. ECU).

 

[safirenside]

My book says different, either way its not even reading one volt. What do you think could be wong? My PCM?

 

[luv2rallye]

Could be. Is the PCM turning the ASD relay on providing +12v to your 95 PCM pin 42? This should be done by the PCM driving it's pin 18 to ground. I just realized the 95 PCM has different pinout than 96-99 so perhaps the CAS and CPS have different voltage (although they both list the circuit as XWW3 8v supply) - I only have the 99 diagrams.
http://www.dsmtuners.com/forums/420a-bolt-tech/283950-2gnt-pcm-connector-views.html

 

[safirenside]

pin 11 is 12 volts, Pin 42 has 11.52 volts, pin 44 has .71volts it should be 8 volt supply, pin 54 11.84volts.

I just tested to see if I had spark and I got no fire. I also tied in pin 54 to pin 44. I have power to my cam 12v and crank 12v and receiving signal from both but still no fire. I have 12 volts to the coil power wire to. Any ideas whats wrong?

 

[luv2rallye]

It's sounding more and more like the PCM. Can you swap with another 95NT? Open yours up and look for leaking capacitors/components, fried components, broken/melted solder traces, rotten egg smell (leaking capacitors).

 

[safirenside]

When I took the back off the pcm it has this redish gell in it so i cant see the board. Ill take the picture tomorow.

Here it is.

I did another test on the coil pack connecter to see if it was sending signal and it was not.

 

[luv2rallye]

PM LightningGSX and/or Steve about this thread for ECU ideas - they both rebuild ECU's and can tell you what to look for inside them.

 

[safirenside]

Alrigt thanks.

 

[safirenside]

Solved. I got a new PCM.