Ok this is the deal, im working on my neighbors friends car its a 97 Q45 he got it towed to my house . At first I got out there to try and turn it over but all it does is crank and doesnt start. I did scan it and got code P0340 cam position sensor which is in the distributor, but before I got to the car someone has already taken it apart and left all the parts in a bag. I did manage to put it back together but still no start. I does have spark since I already checked that. So any Nissan or Infiniti Techs on the board that may know what I should do next ?

 

See if you are getting injector pulse.

 

fuel/spark/compression?

 

I can have some info monday, Im getting Nissan/Infiniti certified right now so this will be some good practice

I would say start with the fuel pump relay if you can locate it. Test the power and ground side to see what's up then get back to me. If not, ill have some diagrams mid-day tomorrow and ill look at the TSB's to see if there any common problems like this.

 

did it work when the person took apart the distributor? was he doing the same thing your doing right now, trying to get it started.


and that cps will make the car not start btw, go get a new sensor, and see if that helps.

 

He should test the wiring for the sensor first then buy a new one if that all checks out. I have all the service manuals that will tell me if its a hall-effect or what not and if it stops ignition, fuel...

 

Ok, it's pretty straight foward.

Here is what your wiring diagram looks like for the CPS.




Here is how they number the connector for the CPS




Here is how they number the harness that connects to the ECU ( harness side)



I dont know if you know the difference between the harness side or connector side but just in case




First have the key in the off position. Disconnect the CPS harness then turn the the ignition on. On the harness of the CPS check for voltage. Red lead on terminal 2 and black lead on battery ground. You should have the same as your battery voltage. If you read nothing then the power side of the circuit is bad.

If that's good you now need to check for continuity between the CPS and ECU.

Turn the ignition back off. Put your multimeter on ohms and check on terminal 3 on the CPS connector and terminal 49 on the ECU connector. Also check between 4 on the CPS and 44,48 on the ECU. If you read nothing then the input side of the circuit is bad.

For the ground side put a lead on terminal 1 on the CPS harness and the other lead on battery ground. If you read nothing then the input side of the circuit is bad.


You should read some kind of resistance but nothing over .5 ohms for continuity.

If all that checks out then replace the CPS. Since they're an LED type of sensor I could imagine there not cheap.

If you have any questions just ask. Good Luck!

 

lol

 

Whats so funny

 

you