This test is for all engines except the 4-cylinder. After turning it on, check for the temperature of the IAT sensor. Its purpose is to measure the temperature of the air entering the engine and provide this data to the PCM. I have a 2003 harley Superglide i just bought and the red key stays on all the time. $62.99 Model # 32707-01C Since the IAT sensor commonly fails over time and can cause significant performance problems, we thought our drivers should know about it. Might be a failing Harley speed sensor. The ECM uses the inputs from this sensor to help calculate how much oxygen exists in a quantity of air. Sometimes, fine metal shavings or or a paste like film from normal transmission wear can cover the end of the sensor. is not in any way affiliated with. JavaScript is disabled. I DID, 113 °C (235 °F) according to the 2002/2003 EDM, 117 °C (243 °F) according to the 2005 EDM, 110 °C (230 °F) according to the 2010 EDM, VerticalScope Inc., 111 Peter Street, Suite 901, Toronto, Ontario, M5V 2H1, Canada, is an independent enthusiast website owned and operated by Content on is generated by its users. Style Replacement For Harley-Davidson™. These components are engineered to measure the air intake temperature and its volume and send this data to the engine control module so that correct amounts of fuel would be pumped up to the injectors. High-Quality O.E. It should be 10°F above or below the ambient temperature of the vehicle. Intermittent problems are the hardest to find and resolve. I’ve never heard of an IAT (intake air temperature) high-temp alert. A check engine light will appear if the sensor fails or if certain trouble codes have been recorded based on different malfunctions. This top-grade product is expertly made in compliance with stringent industry standards to offer a fusion of a well-balanced design and high level of craftsmanship. This top-grade product is expertly made in compliance with stringent industry standards to offer a fusion of a well-balanced design and high level of craftsmanship. P0117 ET Sensor Low 46. P1502 Jiffy Stand Sensor High 44. In this episode, we'll teach you everything you need to know about your Harley-Davidson charging system. TEST 2: IAT Sensor Circuit High Voltage. If this is not the case, you may have a problem with the sensor. We want to make sure that all the wires are connected correctly. For a better experience, please enable JavaScript in your browser before proceeding. The resistance should be around 2500 ohms at 70 °F and drop as the air temperature rises. If you have an ohm meter you can test the sensor. This top-grade product is expertly made in compliance with stringent industry standards to offer a fusion of a well-balanced... IST MAP Sensor Kit by S&S Cycle®. This will cause the sensor to work intermittently or not at all. Multimeter Test: Continuity. Would this cause the engine to run lean or rich? NOTE: If you're coming from TEST 7 or TEST 8, then this result tells you that the most likely cause of the DTC P0113 (Intake Air Temperature (IAT) Sensor Circuit High Voltage) or DTC P0112 (Intake Air Temperature (IAT) Sensor Circuit Low Voltage) is an intermittent short. The Intake Air Temperature (IAT) sensor resistance changes in response to the intake air temperature. I've been getting trouble code PO113 (IAT sensor voltage open/high EFI) on my 2006 Superglide. You should have a reading of approximately 2000 ohms. The sensor resistance decreases as the surrounding air temperature increases. Our online catalog includes throttle position and MAP sensors, idle control motors, and more. Check the warm sensor in your engine. P0118 ET Sensor High 47. The CKP sends data to the motorcycle computer data center about the position and speed of the crankshaft, the ignition and fuel injection. Discussion in 'Electrical' started by dynalarry, Apr 21, 2008. dynalarry Member. You will notice that the engine light comes on when you first turn your ignition to the on position. The resistance of the temperature sensor changes depending on the intake-air temperature. Intake air temperature sensor P0110 testing and replacement. We break it down to what bikers actually need to know in an understandable way. 9 11 0. This may sound silly, but check your grounds as well......Don't ask me how I know. Visit our store if you need high-quality Harley Davidson motorcycle air intake sensors, and choose products by some of the most reputable manufacturers in the game. 3. Check the vacuum hose attached to the sensor and make sure it is in good condition and free of obstructions. This information is beneficial for the engine control unit or ECU for many functions and calculations, such as calculating the air density for effective ignition timing and fuel efficiency. Data logging using SERT indicates that the IAT appears to reading high by at least 10 degrees F and during road testing it may be even higher. Repair if necessary.On the V6 and V8 engines: test the MAP sensor output voltage at the connector between terminals A and B (see drawing). It’s located in the throttle body. We go over how you can test the sensor without any fancy or expensive scan tools. Check your vehicle's repair or service manual for the acceptable ohm range. For example, hot air contains less oxygen than cool air. High-Quality O.E. Harley Davidson Forums. Style Replacement For Harley-Davidson™. We’ll start with a multimeter continuity test. I think I'll just replace the sensor and see if that clears it up. You can test the IAT by placing it in a water bath along with a “good” thermometer and measure resistance of the IAT with a “good” ohm meter. Throttle position sensors are engineered to offer precise data about the throttle position of your intake. If you read any resistance at all, check for short circuits in the wiring to the IAT sensor. TEST 4: Unplugging the IAT Sensor. Crank Position Sensor, 2001-Newer Softail and 2004-Newer Touring Models. TEST 1: Checking The Intake Air Temperature Value. The HD Dealer here said the computer actually said to remove the sensor, clean it, and reinstall. 9 11 0. The past couple of rides home the sensor has been throwing the high-temp/open circuit alert. The coolant is not the issue... check engine light comes on and the error code thrown is IAT sensor high-temp/open circuit. 42. On a fuel injected Harley if you suddenly need to add throttle to start the engine, this is a common sign of a failing MAP sensor. This top-grade product is expertly made in compliance with stringent industry standards to offer a fusion of a well-balanced design and high level of... it ensures everlasting reliability and enduring value. Harley Davidson Forums. If you have an ohm meter you can test the sensor. Test the MAT's resistance when it is cold, by holding the probe on the ohmmeter. The operation of its air intake system largely depends on the condition of its sensors specifically designed to work with the ECM ensuring that the engine can run properly. My buddy's bagger, and '03, had the exact same problem. CASE 1: The multimeter recorded 4.5 to 5 Volts DC-So far so good, since this test result tells you that two very important things: That the PCM is supplying 5 Volts on wire D.; That the PCM is supplying a Ground on wire E.; NOTE: If you're coming from TEST 7 or TEST 8, then this result tells you that the most likely cause of the DTC P0113 (Intake Air Temperature (IAT) Sensor … Does anyone know what temperature the IAT sensor throws the high-temp alert at? The products offered in our store are manufactured from out of durable grades of heat-resistant plastics and conductive sensor alloys to ensure their exceptional performance, superior gas savings, and great reliability for years to come. This is “sensor open/high”. Manufactured from... MAP Sensor by Twin Power®. Idle Air Control Motor by Twin Power®. For instance, one sensor that drivers experience issues with over time is the intake air temperature sensor, also known as the IAT sensor, as well as many other terms depending on the manufacturer. What Does The IAT Sensor Do? A Harley Davidson motorcycle is a great machine for riding on all kinds of roads. to stay up-to-date on our promotions, discounts, sales, special offers and more. TEST 3: IAT Sensor Circuit Low Voltage. The intake-air temperature sensor determines the temperature in the suction pipe and forwards the voltage signals arising from the temperature to the control unit. Discussion in 'Electrical' started by dynalarry, Apr 8, 2008. dynalarry Member. The proper reading should be 0.0 Ω. Shake the IAT sensor connection to the mass air flow sensor, and check to see if there is any difference in reading. This worked for a couple of weeks, symptoms are returning. This evaluates the signals and influences the mixture formation and the firing angle. P1351 Front Ignition Coil Driver Open/Low What Tools Do I Need To Test The IAT Sensor? A Harley-Davidson motorcycle engine may sputter and hesitate when a crank position sensor (CKP) starts to fail. Idle control motors are used to regulate the air flow when the throttle is fully closed determining the idle RPMs. On the V6 and V8 engines: inspect the rubber fitting from the MAP sensor to the throttle body. Step 2. Connect the black lead of the meter to the body of the cold sensor and the red to the terminal. My question is, do I have to remove the gas tank? 2. Step 1. Copyright © 2018-2021 MOTORCYCLEiD.com. Install a short wire, in the IAT sensor connector, and check for resistance in the circuit. P0113I AT Voltage Open/High 49. Note what it registers. If you have a new sensor on hand and want to check it, you can do this easy test. This top-grade product is expertly made in compliance with stringent industry standards to offer a fusion of a well-balanced design and... Crafted to deliver unbeatable levels of quality, High grade materials for exceptional performance, Delphi Series OEM Throttle Position Sensor Connector (ND-13532244), Screamin Eagle Ultra Classic Electra Glide. Reinstall the sensor if it is within range. All manufacturer names, symbols, and descriptions, used in our images and text are used solely for identification purposes only. A Harley Davidson motorcycle is a great machine for riding on all kinds of roads. 1. The OEM ECM can’t be calibrated to correct the IAT sensor reading and I doubt that the “tmax” can be calibrated either. P0110 Code: Intake Air Temperature Sensor 1 Circuit (Bank 1) The IAT sensor is a negative temperature coefficient (NTC) thermistor that decreases in resistance as the temperature of the sensor increases. ... most techs have spare test units. Come join the discussion about modifications, troubleshooting, maintenance, performance, classifieds, and more! did you check the connection at the IAT sensor? This can be very useful tool to point you in the right direction in solving issues. Starting in 2004, Harley’s began to use serial bus technology (the ability to transfer multiple bits of data over a single wire) which allowed them to display DTC’s (Diagnostic Trouble Codes) for the end user. Style Replacement For Harley-Davidson™. Then warm it up with the hair drier and test it again. TEST 6: IAT Sensor Resistance Test (P0112). All rights reserved. P0112I AT Voltage Low 48. High-Quality O.E. Disconnect the wires for the sensor at its power source (Point A in the diagram). P0572 Brake Switch Low 45. Waveform notes. Check Engine Light or trouble code. The operation of its air intake system largely depends on the condition of its sensors specifically designed to work with the ECM ensuring that the engine can run properly. I’m assuming you have the P0113 code set. Connect the sensor to an ohm meter and heat it up with a hair dryer. This product is distinguished by total quality assurance, unsurpassed by anybody else. I have to replace the IAT sensor on my 2006 Superglide Custom. This is a test of the MAP sensor only. A poor or dirty connection will set that code. Locate the MAP sensor along the firewall or to the passenger side of the engine compartment. This provides a signal to the PCM, indicating the temperature of the incoming air charge. When fuel injected Harley motorcycles begin to experience a rough or high idle, or a hard start condition, often this is a result of a faulty Idle Air Control (IAC) or MAP sensor. Throttle Position Sensor by Twin Power®. Your Harley-Davidson, or most motorcycles for that matter, use the same type of charging system, often referred to as a permanent magnet alternator. Disconnect the sensor and measure resistance again, it should now read as an open circuit, ∞ Ω. The Dealer did that for him, took them 4 days, but they didn't charge him. MAP or manifold absolute pressure devices are created to provide the manifold pressure info to calculate the air density thus determining amounts of oxygen coming into the combustion chambers. Forums > General Tech Harley Davidson > Electrical > IAT Sensor trouble code. Throttle Position Sensor by Twin Power®. Plug the black probe into the COM (common) port on your multimeter. In this particular waveform we can observe the reducing voltage of the coolant temperature sensor (Channel A) as the motorcycle warms up from initial start-up.We can also observe the voltage of the intake air temperature sensor (Channel B).The motorcycle was left to run during the test with increased idle via the handlebar choke control. Its been around 113-115 with temps on the freeway around 118 - 121. IAT – Intake Air Temperature – This sensor provides input signals to the ECM as it reacts to the temperature of the air entering the engine. Make sure there are no loose wires and the sensor’s electrical connector is in good shape. Remove the sensor and see if it needs to be cleaned. A forum community dedicated to Harley Davidson V-Rod Motorcycle owners and enthusiasts. Forums > General Tech Harley Davidson > Electrical > IAT Sensor. Also, is there an easy way to test the IAT sensor? It is neither inferred nor implied that any item sold by MOTORCYCLEiD.com is a product authorized by or in any way connected with any vehicle manufacturers displayed on this page. The intake air temperature sensor or IAT sensor has the core function of monitoring the air temperature that is entering the engine of your vehicle. TEST 5: Jumpering the IAT Sensor Circuits. I think it's 220〫, and am just too lazy to go to the garage and pull out the paperwork. P1501 Jiffy Stand Sensor Low 43. He'll have to get a new sensor. If the sensor resistance goes above 50,000 ohms at any time during the test then it needs to be replaced. 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