An expert who has achieved level 3 by getting 1000 points
An expert that got 10 achievements.
An expert that got 5 achievements.
An expert whose answer got voted for 100 times.
Re: 1999 Nissan Altima: Circut board question
Dear cindy: Your injectors are served from the fuse block by a 10A fuse. This is a brown and red wire which goes directly to the injectors and is hot all the time. The ECM makes and breaks the ground to pulse the injectors.
Coming off the ECM, are four wires which are numbered as followed. pin #102 (#1 inj) red and black, pin #107 (#2 inj) yellow and black, pin #104 (#3 inj) green and black and pin #09 (#4 inj)blue and black. These all pulse the grounds and are triggered by the ignition pulse. I hope this has shed some light on the subject.
Often you can go to a Barnes and Noble book store and find shop manuals which will give you the diagrams you seek. You don't necessarily need to buy the book if you are seeking a specific answer. Good Luck.
a 6ya Mechanic can help you resolve that issue over the phone in a minute or two.
Best thing about this new service is that you are never placed on hold and get to talk to real repair professionals here in the US. click here to Talk to a Mechanic (only for users in the US for now) and get all the help you need. Goodluck!
- If you need clarification, ask it in the comment box above.
- Better answers use proper spelling and grammar.
- Provide details, support with references or personal experience.
Tell us some more! Your answer needs to include more details to help people.You can't post answers that contain an email address.Please enter a valid email address.The email address entered is already associated to an account.Login to postPlease use English characters only.
Tip: The max point reward for answering a question is 15.
You will have to figure out if it is a fuel or spark problem to proceed. Vent in gas tank could be causing the pressure in the tank to cause a loss in pressure to the injectors. Something electrical such as a relay could be failing. Is the check engine light on when the engine is running ?
Gday ate, geoff here, well it would seem that the brake lights are trying to earth through the park light system as they are in the same socket in the rear, check the earths from the light pack at the rear, and the then go from there tracing the earth circut even to the point of cleaning rust, mould/moss from them,geoff.
The ecm (electronic control module ) operates the injectors. But their are many inputs that send information to the ecm for it to decide when and for how long to operate the injectors (it opertaes the injectors by actually providing a ground to the circut) .What makes you think its a fuel issue, do you have good fuel pressure...
you have an open circut in the electrical system the easiest way to find the problem is to disconnect the neg side of the battery and hook up a test light to the cable and the post then have someone watch it as you remove the fuses one at a time till the light goes out when the light goes out that is the open circut (most of the time it is the cigarette lighter circut
Sounds like your going to be removeing it again.Take it back out and check the ribbon connecters to see if a copper strip has gotten rolled back or ripped off.While you have it out have a close look at the circut board for opens in any circut which you can repair by scrapping off the circut down to bare copper and the jump it some soldier and a piece of wire,good luck.
no that is not true. i have a sonoma and when i changed the fuel pump it was on its own circuit. the only special thing about the fuel pump is that it is a one piece assembly with the fuel level sending unit. so if you have to replace the sending unit you have to buy a whole new pump.