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2003 Nissan Altima Diagnosis

Tiny
MIKEB57
  • MEMBER
  • 2003 NISSAN ALTIMA
  • 6 CYL
  • FWD
  • AUTOMATIC
  • 120,000 MILES
Vehicle stalled and would not start. Wire to the knock sensor had been chewed by rat. Fixed that. Computer message targetted cam sensor. Replaced that. It starts after several cranks now and does not seem to be stalling, but the message still says there is a cam sensor problem. The harness at the firewall that leads to the cam sensor seems to check out ok. I am at a dead end
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Tuesday, September 15th, 2009 AT 11:34 AM

11 Replies

Tiny
KHLOW2008
  • MECHANIC
  • 41,814 POSTS
Hi mikeb57,

Thank you for the donation.

Since wires had been chewed, there is a possibility the cam angle sensor is broken at some place.

Is the code P0340 or P0345?
Your vehicle is stated as six cylinder, that means it is 3.5 L and it has two cam sensors. Which did you replace?
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Friday, May 4th, 2018 AT 10:55 AM
Tiny
MIKEB57
  • MEMBER
  • 6 POSTS
Sensor A bank 1 was replaced. The code is P0340.
By the way, the wire that was chewed and repaired went to the knock sensor. That code is no longer appearing on the report.
After repairing the wire, the car started with some difficulty. It no longer appears to be stalling so the problem now existing is the time it takes to start. As I said the cam sensor was replaced and the same code still keeps showing up.
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Friday, May 4th, 2018 AT 10:55 AM
Tiny
KHLOW2008
  • MECHANIC
  • 41,814 POSTS
When the codes keep showing, it could either be a fault with the sensor, its wiring circuit or the PCM.


https://www.2carpros.com/forum/automotive_pictures/192750_DTCP0340AltimaFig326_1.jpg




https://www.2carpros.com/forum/automotive_pictures/192750_DTCP0340AltimaFig326a_1.jpg



Do the following test first.
Check continuity between sensor and PCM, terminal 65 ( Yellow wire).
Check the ground connections ( Black or Black/White)
Check Red/Green wire for battery voltage when ignition switch is turned ON.
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Friday, May 4th, 2018 AT 10:55 AM
Tiny
MIKEB57
  • MEMBER
  • 6 POSTS
Could you enlarge that schematic at all? When I do it on this end it is not clearly legible. Thanks
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Friday, May 4th, 2018 AT 10:55 AM
Tiny
KHLOW2008
  • MECHANIC
  • 41,814 POSTS
Sorry the site is not friendly with diagrams. I will email the schematic to you so you can have better control over it.

Hang on and it should be there soon.
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Friday, May 4th, 2018 AT 10:55 AM
Tiny
MIKEB57
  • MEMBER
  • 6 POSTS
Do auto electric shops have any way of testing sensors to see if they are good?
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Friday, May 4th, 2018 AT 10:55 AM
Tiny
KHLOW2008
  • MECHANIC
  • 41,814 POSTS
Yes, there are diagnostic equipments for testing of sensors.
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Friday, May 4th, 2018 AT 10:55 AM
Tiny
MIKEB57
  • MEMBER
  • 6 POSTS
You have been very helpful. Do you have access to the list of parameters for checking ohm resistance from pin to pin on the sensor?
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Friday, May 4th, 2018 AT 10:55 AM
Tiny
KHLOW2008
  • MECHANIC
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The main aim of this site is to help in whatever way we can and we would never turn down any questions if we can help it.

Yes, our database do have specifications for sensor resistance and voltage ranges. Let me know what you requires and I will get it for you.
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Friday, May 4th, 2018 AT 10:55 AM
Tiny
MIKEB57
  • MEMBER
  • 6 POSTS
For the cam sensor previously discussed.
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Friday, May 4th, 2018 AT 10:55 AM
Tiny
KHLOW2008
  • MECHANIC
  • 41,814 POSTS
Here you go. Hope it is legible. This site is not too friendly with diagrams and are often resized too small.


https://www.2carpros.com/forum/automotive_pictures/192750_CamSensorSpec03altima_1.jpg

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Friday, May 4th, 2018 AT 10:55 AM

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