Troubleshooting & Repairing the Nissan Xterra Air Conditioning An awesome member of our community made this guide. It is not managed by iFixit staff. The 2000 Xterra's Air Conditioning is sometimes cool but may not work other times. The Air Conditioning System will get cold when the Compressor Clutch is engaged but the clutch quickly quits and just blows semi cool to warm air. One possible cause of this symptom is that the Thermistor may be defective. Here is how to troubleshoot and replace the thermistor. The Thermistor connector is located below the glove box. You can see the white connector hanging out from under the dash. The purpose of the Thermistor is to keep the Evaporator from freezing. It does this by measuring the temperature and turning off the Compressor when the Evaporator gets below approx. 40 degrees F allowing the Evaporator to defrost. Locate your Air Conditioning Compressor. The clutch is the center area. If the clutch is engaged the center area will be turning.

It will be turned off by the Thermistor to prevent the Evaporator from Freezing. Here are the tools that you'll need to complete this guide. Test the thermistor by turning the Engine ON and the Air Conditioner ON. Using a Voltmeter (set to DC Volts), the Green/Orange wire will have battery voltage (around 13.5vdc) from fuse #29 in the under hood fuse box. The Blue wire will have battery ground from the AC control assembly. The most important wire is the Blue/Black wire. The Voltmeter will show less than .5 volts with the thermistor on (temperature above 45 degrees F). It will show a nominal 4-5 volts with the thermistor off (temperature below 40 degrees F). During inital operation, the temperature at the evaporator will be above 45 degrees and the Voltmeter should read less than .5 volts. When the temperature of the evaporator is below 40 degrees F, the Voltmeter will read 4-5 volts which turns the Air Conditioner Compressor OFF. This keeps the Evaporator from freezing.

If your Thermistor is reading 4-5 volts when you first turn the AC on then your Thermistor is defective and needs to be replaced. Replacing the Thermistor requires removal of the glove box. Remove the four upper screws and the two lower screws as indicated. Using a philips screwdriver, remove three screws. (as indicated by the orange circles) Using a 10mm socket, remove four bolts (as indicated by the blue squares) The two on the right are easy to see but the two on the left are difficult to see and are behind structure.home ac repair lakeland fl Here's were it can get tricky. how much does a 3 ton 13 seer ac unit costOf course the correct way to replace this is to completely evacuate the system and remove the evaporator but with a little ingenuity you can have it replaced in 10 minutes.york hvac parts memphis

Open the evaporate shell by splitting the halves. I used a spring clamp, backwards, to help me hold the halves open. Using a long pair of needle nose pliers, gently work the Thermistor out of the evaporate fins. I purchased a new Thermistor for $52 at the dealership. Install the new thermistor by using the Long Needle Nose Pliers to insert into the evaporator fins. Removing the connector from the bracket was difficult and I broke the bracket. I was happy to see that a new a mounting bracket came with the new thermistor. You will need a small sheet metal screw to attach the mounting bracket in a hole next to the existing mounting bracket. They provided a hole for you to mount the new bracket. ( I guess they al To reassemble your Air Conditioning System, follow these instructions in reverse order. 12 other people completed this guide.Find parts for your automobileFour SeasonsUniversal Air ConditionerDelphiHPS Silicone HosesEarl's Performance PlumbingDormanMaxzoneVintage AirLuber-finerSpectreFJCTracer ProductsACDelcoTectranVibrant PerformanceStandardTYCInterdynamicsSpectra PremiumDaycoGatesMetrixBTPMaradyneContinental ContiTechB'lasterAPDIGenuineKats HeatersMotorVacUViewTuff Stuff PerformanceK-MetalMarch PerformanceAir ProductsCliplightDensoBeck ArnleyOSC AutomotiveSpeed FXRobinairMarkalWIXSantechHolleyOriginal EquipmentMastercoolCSFHastingsBoschATPNPNSPAL AutomotiveSta-LubeFramPilotAuto Metal DirectMahleTruck-LiteAmerican CondenserK&NPurolatorVDOHookerWalkerInnovate MotorsportsCPSShermanMiltonRampagePJ1NationalPeterson Fluid SystemsRTI TechnologiesNissan Motor Company is the longest-running foreign automobile manufacturer that sells compact and mid-size pickup trucks on the U.S. market.

The compact Nissan Frontier is offered in two- and four-door pickup truck body configurations with seating for four passengers. This vehicle features the entry-level S and mid-range SV trims which are powered by a 2.5L I4 engine generating 152 hp, and the SV trim that is equipped with a 4.0L V6 producing 261 hp. The Desert Runner is a package made for rear-wheel drive models. On our digital shelves, we introduce a multitude of A/C and heating parts required for the affordable and effective repair of your Nissan Frontier. Cooperating with the world-renowned aftermarket producers, our online store is full of products that boast the finest quality possible. We constantly expand our product range so that every customer can find the right part at the time they need it. We deal with Goodyear, Dorman, Spectra Premium, who can be trusted to provide your vehicle with first-rate Nissan Frontier A/C and heating parts. Fast delivery, competitive prices and top quality are what we guarantee for every customer.

Article byDon BowmanASE Certified Automotive TechGM: Class 2 Communication Malfunction Conditions Infiniti: CAN communication line - signal malfunction Isuzu: Class 2 communication ID not learned Nissan: CAN Communication Circuit This is a manufacturer specific network code. Specific troubleshooting steps will vary depending on the vehicle. The trouble code U1000 is a vehicle specific code primarily found on Chevrolet, GMC and Nissan vehicles. It refers to a "Class 2 communications failure." Generally, this code will precede an additional code that identifies the module or area of the failure. The second code may be generic or vehicle specific. The electronic control unit (ECU) which is the primary computer on the vehicle is unable to communicate with a module or a series of modules. A module is simply a device that, when commanded to do so, facilitates an action or motion to occur. The ECU relays its commands to the modules through a "CAN bus" (Controller Area Network) network of wires generally located under the carpet.

There are at least two CAN bus networks on a vehicle. Each CAN bus is wired into a multitude of different modules throughout the vehicle. The CAN bus communication network was designed by Robert Bosch and began to appear in vehicles is 2003. Since 2008, all vehicles are equipped with CAN bus networks. The CAN bus communications network allows extremely high-speed messaging to and from the ECM and its associated modules allowing them to be interactive. Each module has its own identifying code and sends binary coded signals to the ECM. The prefix, either a 0 or a 1 identifies the urgency or priority scale of the signal. A 0 is urgent and needs immediate response, while a 1 is less urgent and may orbit until traffic has lessened. The following codes as to the modules activity will be in binary bits seen on an oscilloscope as a squared sine wave, the height of the wave being the medium by which the ECM interpolates the signal and decides the strategy for module operation. The cause for this code varies with each vehicle.

The second code will identify the defective part or area that the fault has occurred. The code is so specific that the technical service bulletins (TSBs) must be examined not only for the make of vehicle, but for the specific model and options present for an accurate assessment. I have experienced several Nissan vehicles with code U1000 that stood alone. No problems were found in any of the systems, yet the code persisted. Exhibiting no driveability or operational problems, the code was simply ignored. Some vehicles direct you to replace the ECM as this is the root cause for this code on this vehicle. Others may lead you to a variable speed wiper motor failure. In the case of one known Nissan TSB, the fix is to clean and tighten the wiring ground connections. The ECM and modules go into a "sleep" mode when the key is off to reduce the load on the battery. Most modules will be go into sleep mode within seconds or minutes after shutdown. The timing is preset and when the ECM commands sleep mode, if the device does not shut down within 5 seconds of the command, even 1 additional second will set this code.