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ECM pin out nissan cefero v6 AT 1997 diagram

No gas coming out from the all injector

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On my 2001 Nissan Quest 3.3L #5 cilynder miss fire replace sparkplugs, wire, distributor, and injector still miss fire so I hook a noid light to it, it won't light up at all can it be the ECM and if you...

I don't know where it is, probably under the passenger side dash. But before condemning the ECM, check the wiring to that injector. First try to determine if it is the power wire or the ground wire for the injector which is lost. With key on, the yellow power wire should have voltage on it at the injector connector. This is independent of the ECM-only the ground wire goes into the ECM, to be internally grounded to pulse the injector. The #5 ground wire is a yellow-green wire.

If you have voltage on the power wire to #5, key on, then we know either the ground wire is bad (broken or open) to the ecm -or the internal ground for that injector is out, inside the ECM.

To determine whether it is the ground wire or the ECM, you will have to locate the ECM, pull the electrical connector off to it (Be sure and take the negative battery post off, first.), then locate the yellow green wire at pin #106 of the ECM electrical connector. Now test the continuity of that wire from the injector connector to the ECM connector-use a voltmeter set to ohms. If the wire has continuity, then the ECM must have a problem- the internal injector driver for #5 may have failed. Also look for a bent pin at #106, or anything amiss in the electrical connector. In most cases, it is not the ECM but a wiring problem.
Good luck. To locate the ECM, register for free at, listing make, model, and year. Look under "repair guides", then component locations-it should tell you the location of the ECM.

Oct 04, 2014 | 2001 Nissan Quest

2 Answers

Problem of ingection

okay okay

u just shud change the gas because:

First, you need to go to to find out which companies are carrying good enough gas to put into you car Most gas stations haven't been selling decent gas, thus leading to problems with our engines.

Secondly, keep ur gas receipts. The engineer has told me situations where people had to pay $2200 out of their pocket because they failed to keep the receipt. The purpose of the receipt is for when u go to BMW and tell them that u have a problem with ur car and they run tests, if they come out and tell u that bad gas caused for this to occur, u have the gas receipt and can now approach the corporate of that gas station.

Thirdly, if you have already put in horrible gas from previous gas stations, which is wut i did for the past yr, there is some bottle that they sell at the dealership which will clean out ur fuel injection system from the previous bad gas u had put in. You simply just pour the bottle into the gas tank before you fill up that way it mixes in

hope this help u

Aug 15, 2008 | BMW 325 Cars & Trucks

1 Answer

05 chevy aveo no injector pulse

At only 30,000? This is not good advertising for Aveo! At those no-pulse times, have you checked for power at an injector connector with key on? With a new ecm, I would not expect the injector ground circuit to be the problem, so maybe you could trace the injector drive circuit back from a wiring diagram. The injectors get power to them when the key is on. They only pulse when the ecm grounds them. good luck, ken.

Nov 26, 2012 | 2002 Nissan Sentra

1 Answer

Is there an injector relay on a 1994 nissan maxima computer

Computers do not use relays. Computers use large transistors (A.K.A. "drivers") to control things like relays, solenoids and injectors.

That being said, your Nissan is equipped with "sequential multiport fuel injection". There are 6 injectors, all of which are supplied power from a 15 Amp fuse in the underhood fuse and fusible link center. The white wires at each of the injectors is hot (Battery Positive voltage) at all times, even with the ignition switch OFF. The drivers in the computer (or ECM)toggle the other wires on each injector (each injector having its own wire color) to ground (Battery Negative) in order to complete the injector circuit and cause the individual injectors to fire at the proper time. This is what is known as "injector pulse".

To sum-up, there are no relays involved in the actual injector circuits on your Maxima. The only relay that is remotely related to the injectors is the ECM Power Relay which supplies power to the ECM. Since the ECM will not function if this relay is defective, neither will the injectors work if this relay is faulty.

I hope this helps you to understand whatever it is you are trying to figure out.

Mar 17, 2012 | 1994 Nissan Maxima

1 Answer

02 Nissan Altima fuel injector N4 has short with ignition key on, injector leak

I am going to assume that you verified this by unplugging the injector and seeing constant power across the pins in that connector, and capmparing to the another good injector. if you have not done so. that is your first reading to take with a meter.
a breif description of how it typically works:
nomally, there is a single common for all the injectors. typically, it is a positive signal energised by the ecm/ecu either directly, or via relay. and usually fused. sometimes, on v8, and some v6's there are 2 commons. then, each injector is individually actuated through the ecu.
next test- if you find the common positive voltage, then the other wire should read nothing with the engine not runing. do an ohm check to ground. you will likely find that n4 only is reading continuity on the non-common wire. trace the harness to the main harness plug. it may be a disconnect in the engine bay, at the firewall, or a complete run to the ecm. unplug it. it may require wd-40 and some massaging fennesse. force is not the first answer to pulling it apart, and the clip may not release normally, reqiring a pick in there to unlatch it. if you still have continuity, then you have a short in the harness grounding between the 2 points. if you do not, then trace the wire from the connection point you disconnected, at least 5 inches away. you can do a pinout check, to find the correct wire. test all to verify you have the correct wire and then you will cut this wire, if you know you can reliably re-attach the wires together. before you do this, if it is not at the ecm test the corresponding pin at the other connection you unplugged from, to make sure you are not reading ground continuity (you may need to find the ground pin in that plug, as it may be the same plug that feeds the ecm ground.) then, unplug the ecm, and re-connect the disconnect, if applicable, and re-check continuity. now, you move to cutting the wire, if the ground is only present with the ecm connected. plug the injector back in and turn the key on. if you receive close to common voltage on the injector side of the cut wire and ground on the ecm side, then there is an internal short in the ecm/ecu. if the system uses a common ground, then all of this is inverted, with the positive battery/ign. as reference, not ground

Mar 10, 2012 | Nissan Altima Cars & Trucks

1 Answer

My 1986 300zx non turbo injectors on pas side not working have power both wires and can ground signal wire and they will fire not getting ground signal could this be computer related

That wire from injector to ecm is the grounding side of the circuit. The computer grounds the circuit inside when it is time for the injector to open. Not sure but I think all three wires on pass. side splice into a single wire going to the ecm. Check the continuity of the wires from pass, side to ecm. Any corrosion on the ecm pins?
Am I understanding right that you have power to both banks of injectors, but only one side, or bank, is firing? If it's not a wiring problem, it could be the computer.

Nov 10, 2011 | 1986 Nissan 300ZX

1 Answer

Power source for ecm and destination of efi fuse for ford mondeo 2.0 16v mk 1 zetec south african make and a pin layout of ecm

Hello! The ZETEC engine was used in the 1999 Ford Escort...I do not know what year your vehicle is, however the pin layouts are the same...

The Fuel Injector Fuse (30A) feeds the injectors via normally open contacts of the PCM Power Relay on a Red/White wire (which becomes Red at the injectors) on pin #12 of the Constant Control Module...
The wire colors of injector control leads (at the injectors) are..#3=Brown/Yellow...#1=Tan...#4=Brown/Light Blue...And #2=White

Wire colors at the PCM plug are...#3=Brown/White (pin 74)...#1=Yellow (pin 75...#4=Green/Orange (pin100)...and #2=Violet/Yellow (pin 103)...

Size restrictions on attachments do not allow me to send the entire PCM...aka...ECM pin layout to you...


Sep 12, 2010 | Ford Escort Cars & Trucks

1 Answer

I am getting error code P0203 on my 2000 Hyundai Sonata, V6. This indicates #3 Fuel injector open circuit. Have replaced fuel injector and continuity of wiring is strong. I am stumped as I continue to get...

Ok.... let's get this clear -- you have 'VERIFIED' no problem with the wiring between the injector connector pins and the ECM?? and you have good pin tension at the injector? and good pin tension at the ECM? and good continuity between the injector & the injector fuse? If in fact this is SO, you have a bad ECM (Engine Control Module). 303f9ab.jpg

Sep 07, 2009 | 2000 Hyundai Sonata

1 Answer

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.

Feb 17, 2009 | 1999 Nissan Altima

1 Answer

The cilynder #1 and spark plug is wet with gas,I did chenged the injector an fuel pressure regulator,still the same engine is shaking, nissan sentra 1993

Did you change the spark plug?? Your car (1993) has a distibutor assy, which means it has ignition wires for each plug. How are your wires??cap?? rotor?? Have you ever done ignition tune up?? If the answer is yes and you have already installed new injector and pressure regulator (althoug it still could be a injection issue/ECM or computer, because ECM is what drives the injectors. If the ECM or wiring to #1 injector has an issue, the injector will not fire off and put gas into the cylinder, resulting in a misfire.) Remove #1 injector connector and check to see if you have power/12V on one side of the connector. If you have 12V there, than check the other wire for continuity to the ECM. You will need wiring diagram to find the right wire color at the ECM. That other wire goes into the ECM to the driver which opens and closes the injector depending on your demands as far as gas pedal input. That driver may be bad, causing the injector not to shoot gasoline. Than I would be looking into a engine issue, such as burned valve, or head gasket problem (coolant getting into #1 cylinder, flooding your spark plug). Tough to diagnose over the computer and not looking at it my self. Let me know what you find.

Dec 15, 2008 | 2000 Nissan Sentra

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