2000 XTERRA WITH CODE 71 UNAVAILABLE DESCRIPTION ON SCAN TOOL

my answers are do a tuneup and use tools and do test to find cause. not me guessing. okk?
no MILES on car told. 100k 150k ,2ook
are you ignoring the cam belt v6 , not replaced at 60 to 100k miles and if snaps engine is now a wreck.?????
means this old belt 2000 old. 23 years old is no GOOD.

turn it over means? cranking but does it crank fast or slow. ???? if fast that is cranks fast no start engine.
no engine told at all, no clues.
3.3L USA engines is common here.v6 or 2.4L I4????
6 engines used word wide but not USA.
and 2 diesel engines, you never said DIESEL.
2.4L is chain drive cam , 3.3L is belt. (key point )

I will guess the V6 usa spec engine,
if engine is good , compression tests pass. (a tool)
and fails to start, there are these reasons
all fuses checked good,transmission can shift all gears.
you said GAS so I guess gasoline, not LPG or the like.
only good clue was GAS.( and engine runs bad)
2nd google clue is smoke+ flooding, sure.!! wasted fuel sure.
first off no engine runs good if spark is bad (otto cycle gas)
nor if engine is bad. (compression below 150psi) a tool.
my wild guess, no tune up done nor new cam belt ever put in V6. (right)? service history matters.
checks ,actions and tests, using tools.
v6 gas.
1: spark parts bad. ( called a full tuneup)and cam belt
2 new distributor cap,. rotor , 6 new spark wires and 6 new spark lugs, (a tune up and new air filter.)
now spark is good.
3(so when it does not start scan the oBD2 port with a scan tool. see P03xx errors ?????????
4:fuel pressure at spec, idling and throttle max for 1second (called gunning engine(right foot) using a tool.
fuel rail pressure tests using a TOOL.
5: fuel pressure too high is FPR bad. or too low.
FPR is on the fuel RAIL. and loves to fail this old. !!!!!
fuel pressure reg. (tested with a tool, during injector bala
Learn:
the dealer can NOT find it because it ran perfect that day so they feel compelled to guess. (and make money) buy your own scan tool and not go broke at dealers.
learn to do a tune up first (called service points)


(so when it does not start scan the oBD2 port with a scan tool. and behold P3xx errors or others.
called by kids today me scan tool throws a code
sure a DTC. write them all down and get help.

Nothing you can do , except make it worst . All vehicles from 2000 on have a transponder chip inside the key head . You need a factory or some other professional type scan tool to read codes in the theft - deterrent module . You can't guess an fix the problem . You can buy a launch scan tool for about $800.00 that would work. You need to know the code stored .

https://www.aa1car.com/library/troubleshoot_antitheft_system.htm

NVIS (NISSAN VEHICLE IMMOBILIZER SYSTEM-NATS) PFP:25386 Description UBS00MOP ? If the security indicator lights up with the ignition switch in the ON position or "NATS MALFUNCTION" is displayed on "SELF-DIAG RESULTS" screen, perform self-diagnostic results mode with CONSULT-II using NATS program card. Refer to BL-102, "NVIS(NISSAN Vehicle Immobilizer System-NATS)" . ? Confirm no self-diagnostic results of NVIS (NATS) is displayed before touching "ERASE" in "SELF-DIAG RESULTS" mode with CONSULT-II. ? When replacing ECM, initialization of NVIS (NATS) system and registration of all NVIS (NATS) ignition key IDs must be carried out with CONSULT-II using NATS program card. Therefore, be sure to receive all keys from vehicle owner. Regarding the procedures of NVIS (NATS) initialization aand all NVIS (NATS) ignition key ID registration, refer to CONSULT-II Operation Manual, IVIS/NVIS. SEF543X

code p 1320 refers to ignition signal---circuit malfunction===causes wiring---ignition coil/ module---ignition system---crank position sensor---ECM
the light will remain until it is reset by the scan tool
At this point from your description of cooling down , the fault may be in the ignition module ( over heating from internal problem)
The crank sensor may have a similar problem

This is the way you start diagnosing this system !
Automatic Level Control Diagnostic System Check
Install a scan tool. Does the scan tool power up?
Go to Step 2
Go to Scan Tool Does Not Power Up in Data Link Communications

2

1. Turn ON the ignition, with the engine OFF.
2. Attempt to establish communication with the Rear Integrated Module (RIM).

Does the scan tool communicate with the RIM?
Go to Step 3
Go to Scan Tool Does Not Communicate with Class 2 Device in Data Link Communications
Select the automatic level control display DTC function on the scan tool.
Does the scan tool display any DTCs?
Go to Step 4
Go to Symptoms

4
Does the scan tool display any DTCs which begin with a "U"?
Go to Scan Tool Does Not Communicate with Class 2 Device in Data Link Connector Diagnosis
Go to Step 5

5

Does the scan tool display DTC B1007 or B1009?
Go to Diagnostic Trouble Code (DTC) List/Type in Body Control System
Go to Step 6

6

Does the scan tool display DTC B1327?
Go to Diagnostic Trouble Code (DTC) List/Type in Engine Electrical
Go to Diagnostic Trouble Code (DTC) List/Type
This is one you should take to a ASE certified repair facility , there are electronic modules involved you have no idea about !

You won't find this information in a Haynes manual ! I know , I work for a GMC dealership , along with Chevy and Cadillac ! this information I'm adding is right out of GMC service information .
Diagnostic Instructions
?€¢
Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure.

?€¢
Review Strategy Based Diagnosis for an overview of the diagnostic approach.

?€¢
Diagnostic Procedure Instructions provides an overview of each diagnostic category.

DTC Descriptors
DTC C0561 71: System Disabled Information Stored Invalid Serial Data Received

DTC C0561 72: System Disabled Information Stored Alive Counter Incorrect

DTC C0561 74: System Disabled Information Value of Signal Protection Calculation Incorrect

Circuit/System Description
The electronic brake control module (EBCM) receives serial data messages from the body control module (BCM), engine control module (ECM), instrument panel cluster (IPC), and the transmission control module (TCM) which are needed to perform antilock brake system (ABS), vehicle stability enhancement system (VSES), or traction control system (TCS) functions.
Conditions for Running the DTC
Ignition voltage is greater than 10 volts.
Conditions for Setting the DTC
The EBCM receives an invalid serial data message from another module.
Action Taken When the DTC Sets
?€¢
The EBCM disables the traction control system (TCS)/ vehicle stability enhancement system (VSES).

?€¢
A DIC message and/or a warning indicator may be displayed.

Conditions for Clearing the DTC
?€¢
The condition for the DTC is no longer present.

?€¢
The EBCM clears the history DTC when a current DTC is not detected in 100 consecutive drive cycles.

Diagnostic Aids
This DTC indicates that there are no problems in the EBCM. The BCM, ECM, IPC and the TCM should be checked for a possible fault.
Reference Information
Schematic Reference Antilock Brake System Schematics
Connector End View Reference Component Connector End Views
Description and Operation ABS Description and Operation
Electrical Information Reference ?€¢
Circuit Testing

?€¢
Connector Repairs

?€¢
Testing for Intermittent Conditions and Poor Connections

?€¢
Wiring Repairs
Scan Tool Reference Control Module References for scan tool information
Circuit/System Verification

1. With a scan tool, view the Invalid Signal Data Display.
2. If no invalid signal are present, view Signal Fault Data in the Enhanced DTC Data.
3. Refer to appropriate module for diagnosing the invalid message data.
4. Do not replace the EBCM due to this DTC fault.

You would need a factory scan tool or equivalent too diagnose this ,not a code reader . So do your self a favor an take to a dealership. I've been doing this for thirty years .

YES SOME YOU NEED TO ADJUST WITH A SCAN TOOL OR A VOLT METER REFER TO THE REPAIR MANUAL FOR THE SPECTS MAKE SURE THE LEVER ON THE TPS IS ON THE CORRECT PLACE SO IT CAN WORK CORRECTLY

you need a scan tool.

get a scan tool or go to auto zone or advance auto and get the code read see what the first code is and work from there

Not sure if this helps or not, but here is information from the 1998 Jeep Grand Cherokee Service Manual, ezg_25.pdf, page 6 of 20…

Hex Code = 95
Generic Scan Tool Code = P0462
DRB Scan Tool Display = Fuel Level Sending Unit Volts Too Low
Description of Diagnostic Trouble Code = Open circuit between PCM and fuel gauge sending unit.

Hex Code = 96
Generic Scan Tool Code = P0463
DRB Scan Tool Display = Fuel Level Sending Unit Volts Too High
Description of Diagnostic Trouble Code = Circuit shorted to voltage between PCM and fuel gauge sending unit.

Hex Code = 97
Generic Scan Tool Code = P0460
DRB Scan Tool Display = Fuel Level Unit No Change Over Miles
Description of Diagnostic Trouble Code = No movement of fuel level sender detected.

for additional information on troubleshooting and resolution:
http://rapidshare.com/files/138412864/ServiceManual.Jeep.Grand.Cherokee.1998_by_Parasico.rar

This code indicates a mechanical problem inside the transmission. Likely in the valve body or the torque converter. He is a description of the cause and a list of possible problems. To diagnose this you need a scan tool capable of reading the trans control module and a pressure guage to read the fluid pressure.