How to check codes on polaris ranger 900

When your Polaris vehicle’s engine loses power and backfires, accompanied by a check engine light, it can be a frustrating experience. A customer says: “I had a moment of panic when the check engine light in my Polaris vehicle suddenly came on during a long ride. It started losing power and backfiring, making the whole experience frustrating.

For the 0 520230 31 code, turn the key on and off to clear the code. Incidentally, if you turn the handlebars a little before you start the quad, when you turn on the key, you should feel your power steering engage. If you can’t get the power steering light to go off, and you don’t feel your power steering engage before you start the quad ...Summary of Contents for Polaris RANGER XP 900. Page 1 RANGER XP® 900 RANGER CREW® 900 Owner's Manual for Maintenance and Safety... Page 2 The engine exhaust from this product contains chemicals known to the State of California to cause cancer, birth defects or other reproductive harm. For videos and more information about a safe riding ...Oil Leaks - Check for leaks at gaskets, seals, engine case mating surfaces, and drain bolt. Re-torque bolts, replace gaskets to fix. Now that you know the most prevalent Polaris Ranger 570 problems reported, let's go over how to accurately diagnose issues before attempting repairs.And, that causes a similar reaction to the Ranger’s engine. 3. Fuel pump issue. Most of the time the throttle cuts out because of some kind of issue in the electronic fuel injection (EFI) pump. Having a faulty EFI pump is one of the major issues that many Ranger owners tend to face.Vehicles are an essential part of our lives, and it’s important to keep them running smoothly. One way to do this is by performing a VIN code transmission check. The process for pe...cannibal said: have a check engine light and cannot get code (s) to display. 1. neutral on trans. 2. foot on brake. 3. cycle key 3 times and stop in on position. wait>then displays end.Affordable Multi-Testers on Amazon - https://amzn.to/2IYP7MnPolaris New OEM Circuit Breakers on Amazon - https://amzn.to/33F2nNVAffordable Polaris ATV Manua...I purchased a 2013 Polaris Ranger 900 XP in December. I only have 23 miles on it so far. This weekend when I pulled it out of the shop I noticed that I have a check engine light and the speedometer is not working. I check all fluids and everything is fine. It is running great and haven't noticed any other issues.

4 posts · Joined 2014. #1 · Dec 28, 2014. I have a 2014 900xp (not crew). At the deer lease and it starts right up but when put in gear and go to accelerate nothing happens. No increase of rpm's, nothing. It's almost like cable is broken to accelerate but it's not. The check engine light is on too.Diagnostic Display Code Definitions. Open Load: There is a break in the wires that lead to the item listed in the chart (injector, fuel pump, etc.), or the item has failed. Short-to-Ground: The wire is shorted to ground between the electronic control unit and the item listed in the chart. Shorted Load: The wires leading to the item listed in ...I see a lot of fuel pump failures in my shop, and the OEM replacements can be very expensive. Save yourself big bucks and fix it yourself! This procedure app...New Part # 2205264. To reset the computer drive in low range at 4000 rpm for around 30 seconds to a minute or until the engine light goes off. Then put in park shut off engine and wait a few seconds and restart. This should work till u get the new sensor.1354 posts · Joined 2021. #3 · Jun 28, 2023. Read the codes just to make sure what they are. If the issue is fixed, drive around in a circle in L at 4000-4200 rpm and it should clear after a couple loops. Like. This is an older thread, you may not receive a response, and could be reviving an old thread. Please consider creating a new thread.

98 posts · Joined 2020. #4 · May 26, 2020. @Noli: one injector not firing 95% of the time it is a bad fuel pump/fuel regulator or clogged filter. Get a fuel pressure tester and hook it up at the fuel rail. 39PSI +/- 2 is the spec. I'm betting you'll have like 10 or 15 psi there.Turn on the vehicle's ignition and wait for the check engine light to turn off. Drive the vehicle normally for a few minutes to allow the onboard computer to recalibrate. If the Limp Home Mode is still activated, it's best to have the vehicle inspected by a qualified mechanic to identify and repair the underlying issue.Oct 19, 2020 · I have a 2017 XP 900 and the check engine light came on and it would only rev up partially. It showed a code of 29 4 which says something about low voltage. I traced wires and can't see any bad spots where maybe a rat chewed. I also unplugged the connector on the throttle body and plugged it back in, but no change. Turn key on and of a few times, or go to code and hold button down till clears, or drive it in low at 4000 rpms for a few minutes. Each machines is different but these are all the fixes I know of. Turn key on and of a few times, or go to code and hold button down till clears, or drive it in low at 4000 rpms for a few minutes.Find A Dealer Near You. Enter City, State or Zip Code. Use Current Location. Filter By (Optional) Reset Filters. Enter your 17 digit VIN number to find important information about your Polaris Ranger like engine serial number, model number, factory warranty, extended service, guides, manuals, product recalls and safety bulletins.

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Check Engine Code 3 168 over voltage. I have a 2012 RZRXP4 with //stage 2 kit. I am getting a OV 17.5, the check engine light comes on and the EPS stops working. If I keep driving it will go off and everything starts working fine. Keep driving and it will come back. The Check engine Code is 0 on the left 3 in the middle and 168 on the right.Fixing Code 520207: AWD Control Circuit Malfunction. A malfunction in the Polaris Ranger’s AWD control circuit, signaled by Code 520207, indicates urgent attention. To fix this, you might be looking at repairing or replacing the AWD control module. It could be a matter of some wiring needing attention, too.This is a clever trick that many garage and professional mechanics employe to quickly diagnose a malfunctioning fuel injector: using a stethoscope (yes, like the ones at the doctor) or, quite literally, pressing the end of a long screwdriver and pressing your ear to the butt end.It will show one of six symbols: Display Area 2 (2) displays the odometer, trip meter, trip meter 2, trip timer, voltage, engine temperature, engine hour meter, programmable service hour interval, ground speed or engine RPM. Display Area 1 (3) displays engine RPM, ground speed or coolant temperature. The Fuel Gauge (4) shows the level of fuel ...Polaris Code 65591. The DTC code 65591 indicates that there is a misfire detected in cylinder 1, which is the PTO (Power take off) where the clutch commits power to the driveshaft. Polaris Code 65592. DTC code 65592 indicates that a misfire is detected in cylinder 2. The other side of the engine, MAG (Magneto side).The Owner's Manual for this vehicle contains warnings, instructions and other information you must read and fully understand before safely riding or performing maintenance on this vehicle.

What does engine code 27 mean on a 2010 Polaris Ranger 800? FROM THE WEB>>> Code 27 is "TPS SET ERROR"..take it to the dealer. Throttle Position Sensor reading is off...the newer models check the TPS reading at a startup..and set that as a baseline...if the reading is outside the normal range it throws the code.TennesseeRZR Discussion starter. 903 posts · Joined 2011. #1 · Dec 5, 2019. I have a 2014 rzr xp 1000 that is showing a code "636". A problem with the crankshaft position sensor. I need some advice on how to test it. TIA. Like. Sort by Oldest first.To check the oil, do the following: Position vehicle on a level surface and place the transmission in PARK. Stop the engine and allow it to cool down before removing the dipstick. Raise the cargo box. Unlock the dipstick lever 1 . Remove the dipstick and wipe it dry with a clean cloth.There is one other thing you can try, which is very simple ~ sometimes these machines will get little air in the top of the engine. There is a screw to let the air out - this is a simple thing to do to make sure that is not the problem. You will need to know how to do that anyway if you drain the water. Hope this helps ~ good luck.Oct 19, 2020 · I have a 2017 XP 900 and the check engine light came on and it would only rev up partially. It showed a code of 29 4 which says something about low voltage. I traced wires and can't see any bad spots where maybe a rat chewed. I also unplugged the connector on the throttle body and plugged it back in, but no change. Downloading Codes The EFI diagnostic mode is for informational purposes only. 1. Engage the parking brake 2. Stop the engine 3. Turn the key switch to the ON position. 4. Turn the key switch off and on three times in less than 5 seconds, then leave the switch ON. Any blink code numbers stored in the EFI module will display, one at a time, on ...Here's a list of the Trouble Codes for everyone to reference: 21 Loss of Synchronization. 22 TPS Circuit: Open and Short To Ground. 22 TPS Circuit: Short To Battery. 23 RAM Error: Defective ECU. 25 Transmission Input - Invalid Gear. 26 Vehicle Speed Sensor - Implausible.Remove the airbox cover and air filter to access the fuel rail and injectors. Step 3: Remove the Fuel Rail -. Remove the fuel rail bolts and gently lift the fuel rail to access the injectors. Step 4: Remove the Injector -. Disconnect the injector, electrical connector, and fuel line.Having issues with this code 746 5. machine goes into awd and two wheel locked bot will not respond to turf mode. I took the switch apart and cleaned the contacts. Checked the 2 wire plug that goes to the turf actuator on the engine has a constant 11.70 volts with the machine off but key on.Problem One: ECU Has No Communication. The ECU is connected to a lot of components in your Polaris Ranger. ECU communicates with other modules through connecting with-. All of the sensors, The input processing circuitry, The analog-digital conversion circuitry, The microcomputer, The power supply, The output processing circuitry, and.If a belt fails on your Polaris RANGER XP 900, always clean any debris from the clutch air duct and from the clutch and engine compartments when replacing the belt. Failure to remove all debris when replacing the belt could result in vehicle damage, loss of control and severe injury or death. To replace the belt, do the following: 1.Select "Diagnostic Codes" from the Options Menu by pressing the MODE button. Toggle the Up/Down Buttons to cycle through Code (s). NOTICE. This option will only be available if a fault code was set or is active during the current ignition key 'on' cycle. Turning off the ignition will clear any saved fault codes from the gauge.

gat Discussion starter. 155 posts · Joined 2012. #1 · Mar 26, 2016 (Edited by Moderator) Has anyone received this code (520230 31), and how did you fix it? The eps code came on and stopped the eps from working. I went in some deep cold water, and all was fine. On the next ride, I turned on the wheeler, and there was the code.

Diagnostic Display Code Definitions. Open Load: There is a break in the wires that lead to the item listed in the chart (injector, fuel pump, etc.), or the item has failed. Short-to-Ground: The wire is shorted to ground between the electronic control unit and the item listed in the chart. Shorted Load: The wires leading to the item listed in ...Fixing & Clearing Polaris Code 84. ... For more on Polaris issues, check out the following before you go: ... Polaris Ranger XP 900 Problems; Polaris Ranger 570 Problems;The first code was with the engine light blinking showed on the left side of the display a 0. On the right side was an 84. below them in a smaller font was a 2. The next code was with the steering wheel blinking. L-1, R-84 and Below - 19. A third code showed with the steering wheel blinking L-2, R-190 and below was a 2.The 2018 Polaris Ranger 900 wiring diagram consists of four main components: the main power source, the ignition switch, the controller, and the auxiliary components. The main power source is typically a 12-volt battery, and the ignition switch is responsible for powering the engine. The controller is responsible for controlling the operation ...the xp have a built in diagnostics read into the manual for how to ID the code (if the engine light goes away then u cant see the codes only dealer can see past fault codes) the wrench can also be changed on the xp to however many hours u want it to turn on mutiples of 5 up to 100 also see manual. if needed i can give u a more detailed answer ...Try taking both battery cables off of the battery and touching the ends together. (just the cables no battery) It will erase the memory by draining the reserve voltage in the module. Buddy. I know the "VOICES" aren't real but they have some great ideas. 1999 Sport 400 2x4.It will show one of six symbols: Display Area 2 (2) displays the odometer, trip meter, trip meter 2, trip timer, voltage, engine temperature, engine hour meter, programmable service hour interval, ground speed or engine RPM. Display Area 1 (3) displays engine RPM, ground speed or coolant temperature. The Fuel Gauge (4) shows the level of fuel ...Release the winch clutch and spool out the necessary length of winch cable. Align the winch cable as close as possible to the winching vehicle's centerline. Attach the winch cable hook to the anchor point or the stuck vehicle's frame following instructions in this manual. Re-engage the clutch on the winch.My Polaris Rzr 1000 was running fine when all of the sudden it STALLED and would barely restart. After spark plugs I knew I had a fuel issue.. Fuel Rail was ...

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The check engine light on a Polaris Ranger can illuminate due to various reasons, including: Fuel system issues, such as a clogged fuel injector or fuel pump failure. Malfunctioning oxygen sensor or other sensor-related problems. Ignition system problems, like spark plug or ignition coil issues.Always check and change the transmission oil at the intervals outlined in the Periodic Maintenance Chart. Maintain the oil level even with the bottom thread of the fill plug hole. The fill plug is located on the rear of the gearcase. Maintain the fluid level at the bottom of the fill plug hole. To check the transmission fluid, do the following:The 2.3-liter engine inn your Ford Ranger uses a synthetic rubber belt to synchronize the engine cylinders and valves. But years of service tend to wear out and stretch the belt. I...Check Engine Code 3 168 over voltage. I have a 2012 RZRXP4 with //stage 2 kit. I am getting a OV 17.5, the check engine light comes on and the EPS stops working. If I keep driving it will go off and everything starts working fine. Keep driving and it will come back. The Check engine Code is 0 on the left 3 in the middle and 168 on the right.For the 0 520230 31 code, turn the key on and off to clear the code. Incidentally, if you turn the handlebars a little before you start the quad, when you turn on the key, you should feel your power steering engage. If you can't get the power steering light to go off, and you don't feel your power steering engage before you start the quad ...Nov 20, 2015 · No spark pulls code 636 -crank position sensor or CPS abbreviated. Issue: Shorted out or broken wire on the back main harness the CPS (crank position sensor) plugs into. Located under the airbox tube and intake manifold tube, this is a branch off the main wiring harness that the CPS plugs into. Solution: Solder and re-insulate the broken wire. Resetting the check engine light on a Polaris Ranger 900 is a breeze. Simply press and hold the “Select/Reset” button and the “Mode/Set” button on the instrument cluster for five seconds. Voila! The check engine light will vanish. For 2014 or newer models, just hold the “mode/set” button for three to five seconds. Easy peasy!Try taking both battery cables off of the battery and touching the ends together. (just the cables no battery) It will erase the memory by draining the reserve voltage in the module. Buddy. I know the "VOICES" aren't real but they have some great ideas. 1999 Sport 400 2x4. ….

Fixing Code 520207: AWD Control Circuit Malfunction. A malfunction in the Polaris Ranger’s AWD control circuit, signaled by Code 520207, indicates urgent attention. To fix this, you might be looking at repairing or replacing the AWD control module. It could be a matter of some wiring needing attention, too.This code is caused when the ECU has reached a max limit when adjusting the closed loop fuel trims. This code can be set due to an exhaust leak, Intake system leak, or faulty O2 sensor system. Check O2 sensor wiring and this code may accompany other codes. Had a friend with a ranger that got that code I think last summer he found his spark ...Test the voltage about an hour after you are done charging and run the headlights before the voltage test for about 15 seconds to remove any surface charge, turn the headlights off, then test. On a 2 week old battery it should read 12.6 volts minimum.Thanks for watching! I'm sorry if this did not solve your issue. This is just the common places to look on your machine. It doesn't mean this is for sure you...No spark pulls code 636 -crank position sensor or CPS abbreviated. Issue: Shorted out or broken wire on the back main harness the CPS (crank position sensor) plugs into. Located under the airbox tube and intake manifold tube, this is a branch off the main wiring harness that the CPS plugs into. Solution: Solder and re-insulate the broken wire.The Owner's Manual for this vehicle contains warnings, instructions and other information you must read and fully understand before safely riding or performing maintenance on this vehicle.98 posts · Joined 2020. #4 · May 26, 2020. @Noli: one injector not firing 95% of the time it is a bad fuel pump/fuel regulator or clogged filter. Get a fuel pressure tester and hook it up at the fuel rail. 39PSI +/- 2 is the …The SPN code on Polaris snowmobiles is 2-6 digits long and is located on the top right of the display. FMI-Code: The “Failure Mode Indicator” code identifies the fault mode. It’s 1-2 digits in length and is typically located on the bottom right. Number of Fault Codes: If besides the SPN and FMI codes there is a large number (ranging from ...Manufacturer’s suggested retail price (MSRP) subject to change. MSRP also excludes destination and handling fees, tax, title, license and registration. How to check codes on polaris ranger 900, I have a 2017 ranger NorthStar 1000 runs fine as long as you stay on dry ground. Don't go threw a water hole or drive it in the rain. Some times right away sometimes after a few minutes it will go in to Limp mode and check engine light comes on Code 0520276, 1520276 comes up PPS. Read about this similar issue Did most of the common things that ..., Does anyone have codes for a 2016 Polaris ranger side by side 4x4. I have a code on left side of readout #0 on right side it is 1268 and on bottom it is 3 can anyone help also check engine light is on. ... 2015 Ranger 900 XP EPS, Polaris tip out windshield, glass rear window, Polaris canvas doors. 3600 lumen driving lights, TMH 20'' Dual Row ..., Mar 26, 2016 · gat Discussion starter. 155 posts · Joined 2012. #1 · Mar 26, 2016 (Edited by Moderator) Has anyone received this code (520230 31), and how did you fix it? The eps code came on and stopped the eps from working. I went in some deep cold water, and all was fine. On the next ride, I turned on the wheeler, and there was the code. , 1646 posts · Joined 2012. #2 · Jan 23, 2021. Wont be much help here. 84 is vehicle speed signal. 2 is erratic or missing data. 19 is signal out of range. Possibly a crank position sensor code? Try driving in low keeping the rpms above 4000 rpm for 30 seconds or a littlemore. See if it clears the code., 1354 posts · Joined 2021. #3 · Jun 28, 2023. Read the codes just to make sure what they are. If the issue is fixed, drive around in a circle in L at 4000-4200 rpm and it should clear after a couple loops. Like. This is an older thread, you may not receive a response, and could be reviving an old thread. Please consider creating a new thread., Replaced all 3 wires w/ new wires including connectors inside the plug. Figured out how to read fault codes and identified the following codes present: 22 (TPS), 44 (CPS), 45 (Pressure ckt low), 46 (pressure ckt hi), 47 (IAC), 51 (Injector). Disconnected battery to clear codes and all codes returned., Feb 24, 2012 ... Discountutvtires.com 2008 Polaris Ranger service wrench reset / check engine light. 165K views · 12 years ago ...more ..., Polaris Ranger Troubleshooting steps include Electrical Problems: Check the battery, fuses, and connections. Starting Issues: Inspect the ignition switch and starter. Engine Trouble: Verify fuel and air filters, spark plugs, and fuel pump. Transmission Problems: Assess the belt and fluid levels. Suspension Concerns: Inspect shocks, bushings, and joints. Polaris UTV Troubleshooting, Polaris ..., This Trouble Code sets if the Throttle Position Sensor Signal is above 4.61 Volts. Can be caused by Damaged Wiring, a faulty Throttle Position Sensor or ECU / Connections. 4. P0122. Throttle Position Sensor 1 Voltage Low. This Trouble Code sets if the Throttle Position Sensor Signal is below 0.7 Volts. , But even as one of the best models in the line, the Ranger XP 900 suffers from six common problems, including: Gears Grinding. Clutch Problems. Clunking From Faulty U-Joints. Knocking Noise Due To Chain Tensioner. Excessive Heat in Cab and Under Seats. Engine Overheating., Polaris RZR Forum - RZR Forums.net - View Profile: teamhog Polaris RZR Forum - RZR Forums.net - View Profile: Tuf-Skin To answer your question. Code 1-1268-3 is Ignition coil short B+ mag. 0-1269-1 is Ignition coil short B+ PTO. So according to the codes you have an issue with the B+ to the coils. Hope this helps., Find a Polaris ATV/SxS Dealer Near You. Access information you need as an owner of a Polaris RANGER vehicle including owner's manuals, maintenance tips, frequently asked questions, how-to-do videos, and helpful links and tips., Attach your Positive lead from the Digital Volt meter there. Slide 1 clip beside the PURPLE wire on the harness side (or BLACK if you probe the TPS side). Attach your Negative lead from the Digital Volt meter. there. Be careful not to allow the paperclips or either lead to touch each other or any metal., Check Engine Codes MADE EASY for your Polaris Snowmobile. See how to replace the (EGT) Exhaust Gas Temperature Sensor on a RMK 700/900 as well as what the bl..., The Polaris Ranger is a powerful and versatile off-road vehicle that can tackle any terrain. Whether you’re looking for a vehicle to take you on an off-road adventure or just need ..., Diagnostic Display Code Definitions. Open Load: There is a break in the wires that lead to the item listed in the chart (injector, fuel pump, etc.), or the item has failed. Short-to-Ground: The wire is shorted to ground between the electronic control unit and the item listed in the chart. Shorted Load: The wires leading to the item listed in ..., Polaris Ranger Forums. Ranger Technical crank position sensor ... (code 21)on my 2009 Ranger Crew Cab. Warranty expired a month ago and Polaris wont come good for it. ... Crew 900, PRC Ranger Club, XP 900, RZR XP 4 900, RZR 570, HD, 170, RZR-S, XP 900, RZR XP 4 900, ORV, side by side, SSW and off-road information. Show Less ., Diagnostic Display Code Definitions. Open Load: There is a break in the wires that lead to the item listed in the chart (injector, fuel pump, etc.), or the item has failed. Short-to-Ground: The wire is shorted to ground between the electronic control unit and the item listed in the chart. Shorted Load: The wires leading to the item listed in ..., Jan 16, 2023 · My 2013 Polaris Ranger has low power and shows engine code 651. This code is an injector misfire where the electrical connection at the injector was broken.... , Sep 1, 2021 ... Polaris RZR Ranger 1000 900 800 570 How To Check Pull Engine Codes, Reset Wrench Light, Check Engine Temperature, Voltage, Check Hours On ..., Check Engine Codes MADE EASY for your Polaris Snowmobile. See how to replace the (EGT) Exhaust Gas Temperature Sensor on a RMK 700/900 as well as what the bl..., Follow these steps to clear the diagnostic trouble code: Stop the UTV and turn the engine off. Allow the engine to sit for 25-30 minutes. Turn the engine on. Doing this eliminates the limp mode. However, the fault code will remain on the dash. Drive your UTV slowly for a few minutes to allow the ECU to clear the code., View and Download Polaris RANGER XP 900 2018-2019 service manual online. RANGER XP 900 2018-2019 offroad vehicle pdf manual download. Also for: Ranger xp 1000 2018-2019, Ranger crew 900 2018-2019, Ranger crew 1000 2018-2019. , Malfunction Indicator Troubleshooting. The malfunction codes will blink on the controller. The code definitions provided here are for informational purposes only. TIP. If the indicator illuminates due to a minor issue such as a low voltage condition or a sequence fault (reversing direction without releasing the accelerator), select neutral and ..., Here are the "Blink Codes". 21: Loss Synchronization. 22: TPS: Open or Short Circuit to Ground. 22: TPS: Short Circuit to Battery. 23: RAM Error: Defective ECU. 25: Transmission Input: Invalid Gear. 41: Intake Air Temp Sensor: Open or Short Circuit to =Sensor Voltage (ECU) 41: Intake Air Temp Sensor: Short Circuit to Ground., It will show one of six symbols: Display Area 2 (2) displays the odometer, trip meter, trip meter 2, trip timer, voltage, engine temperature, engine hour meter, programmable service hour interval, ground speed or engine RPM. Display Area 1 (3) displays engine RPM, ground speed or coolant temperature. The Fuel Gauge (4) shows the level of fuel ..., By pressing the toggle buttons, you can scroll through the modes. The hour meter on the Ranger EV is found below the battery discharge indicator and above the indicator lights on the vehicle console. Sometimes, it can also be found in the instrument cluster’s Display Area 2., Shows how to remove ecu on polaris models with a bosch me 17 style ecu., 900 xp check engine code. i spent yesterday putting a snorkle on my 900 and when we got finished i went too start it and it fired and threw a check engine code.. i looked code up and it says it is a idle air control valve (iac) m17; iac stepper pin 1 and the sub code is driver circuit grounded... any ideas of what i could have missed/done?:rm ..., Page 1 RANGER RZR XP® 900 RANGER RZR XP® 4 900 Owner's Manual for Maintenance and Safety... Page 2 WARNING Read, understand, and follow all of the instructions and safety precautions in this manual and on all product labels. Failure to follow the safety precautions could result in serious injury or death. WARNING The engine …, Check Engine Code 110. ... I have the same thing on my 2015 900 XP. Any info would be appreciated. Save Share. Like. ... A forum community dedicated to Polaris Ranger owners and enthusiasts. Come join the discussion about performance, modifications, winches, tires, troubleshooting, maintenance, reviews and more! ..., The Owner's Manual for this vehicle contains warnings, instructions and other information you must read and fully understand before safely riding or performing maintenance on this vehicle., Problem One: ECU Has No Communication. The ECU is connected to a lot of components in your Polaris Ranger. ECU communicates with other modules through connecting with-. All of the sensors, The input processing circuitry, The analog-digital conversion circuitry, The microcomputer, The power supply, The output processing circuitry, and.