Intake heater light on freightliner

Gasoline engines use an intake manifold to deliver a fuel and air mixture to each cylinder for combustion. Intake manifolds once were made of cast iron. The biggest problem with ca...

Posts: 944. Check Engine Light - Grid Heater. I have a CAT C-7 (350 HP) in a Travel Supreme motorhome with a check engine light illuminated due to the following codes: 70-5: Inlet Air Heater Driver #1. 729-5: Air Intake Heater Open Circuit. I checked the grid heater solenoid and it is good, but it appears I am not getting control power to the ...5546 posts · Joined 2010. #3 · May 15, 2010. i believe it uses the ambient air sensor not 100% on that though, it could be that the light bulb burned out. when cold and waiting to start do you hear the light clunk from the heater. mine is pretty noticable and would know exactly what it was. 2005 white auto, Stage 4 ATS Trans, 120HP DDP ...ok, attached is a pin diagram for the air heater. check all fuses with a test light for power on both sides key on. Roy. As I said, I'm not near the vehicle, so will have to try this out later. Thanks. Ask Your Own Medium and Heavy Trucks Question. Hello, the engine number is ***** Ref No is C01-00003-394. ok, attached is a pin diagram for the air heater. check all fuses with a test light for power on both sides key on. Roy. As I said, I'm not near the vehicle, so will have to try this out later. Thanks. Ask Your Own Medium and Heavy Trucks Question. Hello, the engine number is ***** Ref No is C01-00003-394. Pre-heat (after key On and before cranking): At key On, the ECM checks the intake manifold air temperature. Based on this temperature, the ECM lights a Wait to Start lamp and energizes the intake air heaters (as Figure 1.1 above). After a calibrated period of time, the ECM turns off the intake air heaters and the Wait to Start lamp turns off.Once …Custom-built Freightliner vehicles are equipped with various chassis and cab components. Not all of the information contained in this manual applies to every vehicle. For details about components in your ve-hicle, refer to the chassis specification pages in-cluded in all new vehicles and to the vehicle specifi-cation decal, located inside the ...Freightliner AC systems are much larger than most vehicle systems, and they use a larger condenser and an air compressor to cool the air. An evaporator is used on freightliner truc...

2513208C92 INTAKE GRID HEATER KIT is an OEM part from Navistar International®, Kits: (1.00) SINGLE GRID HEATER ASSEMBLY; (1.00) GASKET INLET DUCT- INTAKE MANIFOLD; (1.00) INSTRUCTION SHEET; , Engine Platform: I367 - 2013 Emissions MaxxForce DT, 9, 10, OEM Description: INTAKE GRID HEATER KIT, Package …Immerse the IAT sensor in a cup of ice water (below 66F ambient temp for 05 truck) should trigger the grid heater operation. If not then the relay doesn't get the 12V trigger signal from ECM for some reasons or the relay ground is missing. _________________. '05 2500 QC SLT SB 4X4 48RE Smarty Jr 205k miles.The “wait to start” light comes on ever time during pre-start, but grid heaters never engage. It’s never worked since I bought the MH in 2013. I’ve used block heater to preheat engine prior to starting. Van Willams had this problem in 2015 and he checked all connections in engine room area which ended up resolving the problem.EZWiring EZWiring™ makes Freightliner, Sterling, Western Star, Thomas Built Buses, and Freightliner Custom Chassis Corporation products’ wiring drawings and floating pin lists available online for viewing and printing. EZWiring can also be ac-cessed from within PartsPro. Introduction Descriptions of Service PublicationsDo you know how to test a thermocouple on a gas valve? Find out how to test a thermocouple on a gas valve in this article from HowStuffWorks. Advertisement Inside your gas-operated...To contact Freightliner about a concern about a specific vehicle call the Customer Assistance Center at 1-800-385-4357 or complete a Product Concern Form. Vehicles domiciled in Canada thought to have a defect that could cause a crash, injury, or death, should immediately be reported to Transport Canada and Daimler Truck North America …do if they should light up. If the lamps remain on after the recommended actions, contact your Caterpillar authorized dealer. (If Equipped) The dash switch allows the driver to control the 1. Automatic (Preferred Position): A regeneration cycle starts automatically when engine conditions warrant. The driver does not need to take any action. 2.For people using gas water heaters, two options are offered--natural gas or propane. According to Energy Star, 15 percent of a home’s energy use is attributed to heating water. Bot...

BUSINESS CLASS M2 MAINTENANCE MANUAL Models: M2 100 M2 106 M2 106V M2 112 M2 112V STI-455-7 (02/03/2022) Published by Daimler Truck North America LLC 4747 N. Channel Ave.Find somewhere else to keep these household objects. In addition to using less energy, part of the appeal of tankless hot water heaters is that they take up less space than traditi...Here I show how to diagnose a air intake heater circuit on a Cummins Isc EngineI love my coffee as much as the next cup (and the one after), but tolerance to its effects can be a real bummer. If you want to feel like you can outrun a cheetah again, try a brie...Nov 6, 2011. #4. Yes, when you turn the key to the run position the gauges will sweep from the lowest values to the highest and the solenoids in the air valves will do a "chuff" test. Then the gauges will go to the positons for the conditions present when the engine is off. I'm not sure of the 5.9 Cummins engine has an intake manifold grid ...Intake Heater Light: Troubleshooting Tips for Bus & Freightliner | JustAnswer. Ask an Expert. Car Questions. Truck Repair. This answer was rated: ★★★★★. The intake heater light flashes when the bus is cold however… The intake heater light flashes when the bus is cold however once it warms up, it doesn't come back on until the engine cools off.

Duke energy power outage map ohio.

Air intake restriction vacuum is measured in inches of water (inH 2 O). For vehicles equipped with a graduated indicator or a restriction gauge on the dash, check the gauge with the engine off. If the yellow signal stays locked in the red zone once the engine is shut down, or is at or above 25 inH 2 O, the air cleaner element needs to be replaced. Nov 6, 2011. #4. Yes, when you turn the key to the run position the gauges will sweep from the lowest values to the highest and the solenoids in the air valves will do a "chuff" test. Then the gauges will go to the positons for the conditions present when the engine is off. I'm not sure of the 5.9 Cummins engine has an intake manifold grid ...Mar 6, 2020 · This heater is a GREAT drain on the 12 volt system. (240 amps). The heater comes on when the ignition is turned on and runs providing heat to the intake of the turbo when cold starting. Hence the "Wait to start" light on the dashboard. If you activate the start before this light goes out, you will overload the circuit and possibly the fuse will go. 163. Wait to start light is not coming on. But engine starts. The wait to start light is for the engine intake air heater. When key is first turned on, all the lights on the dash come on for a couple of seconds, including the wait to start light. But it used to stay on for a few seconds after that, then go off signaling it was time to turn the ...#1 · Apr 19, 2017. I have an 05 2500 with a stage 2 bd turbo, 90 over injectors and a smarty touch tuner. My grid heater light keeps coming on while I'm driving along with ten dings. …

Thread Tools. 2001 Cummins 5.9 ISB 300HP What's the purpose of the inlet or intake heater? Is it used instead of glow plugs? When does it operate? If it goes inop …2 Vehicle Access. Assist Rails and Access Steps. Entering and Exiting the Bus. Front Door Opening and Closing. Battery Access. Hood Opening and Closing. Emergency Roof Escape Hatch. Emergency Door. Emergency Window Exits.New Design Old Designtop trailer lights went out on 2014 M2-106 box truck . can't locate fuse for it and desperately trying to avoid a ticket while working at night. been at … read more. Associate of Applied Scienc... 2016 m2 106. Range inhibit light is on.If you have power at the output, check the connections to the intake heater. I like to put an inductive ammeter onto the wire from the relay to the intake heater to confirm low power draw before removing the heater grid. In the 17 yaers of working with the Cat engines,we have only had to change 2 of the heater grids. New Design Old Design This heater is a GREAT drain on the 12 volt system. (240 amps). The heater comes on when the ignition is turned on and runs providing heat to the intake of the turbo when cold starting. Hence the "Wait to start" light on the dashboard. If you activate the start before this light goes out, you will overload the circuit and possibly the fuse will go.EZWiring EZWiring™ makes Freightliner Custom Chassis Corporation, Freightliner, Ster-ling, Western Star, and Thomas Built Buses products’ wiring drawings and float- ... 09–03 Air Intake System Inspecting † † † † † † ††††††††††††† ... 20–03 Coolant Heater Check, Webasto Inspect the coolant heater ...Jan 25, 2020 · top trailer lights went out on 2014 M2-106 box truck . can't locate fuse for it and desperately trying to avoid a ticket while working at night. been at … read more. Associate of Applied Scienc... 2016 m2 106. Range inhibit light is on. View and Download freightliner 122SD maintenance manual online. 122SD trucks pdf manual download. Also for: Coronado 132. ... Heater and Air Conditioner 88 ....Hood, Grille, ... Page 32 Air Intake 01/17/2012 f090496 1. Steel Plate 2. Rubber Fig. 6, Mounting Isolator 09/3 122SD and Coronado 132 Maintenance Manual, February 2015...

2001 Freightliner FL70, the glow plug light and the ABS light stay on all the time. Is it ok to drive? 2001 Freightliner - Answered by a verified Technician. ... The vehicle looks to be in great shape! I think the light is probably just a failed glow plug, or Intake heater. With this size of truck it might just be an intake heater but either ...

open a can of worms. essentially there have been. a few cases of the grid heater bolt breaking off and finding a home pounded into the top of cylinder 6. the belief is the bolt loosens and electrical current arcs causing it to fall off, or constant elec current arcs causing it to fall into intake.09 Air Intake . 09–01 Air Cleaner Element Inspection and Replacement ; 13 Air Compressor . 13–00 Safety Precautions ; 13–01 Air Compressor Inspection ; 15 Alternators and Starters . 15–00 Safety Precautions ; 15–01 Alternator, Battery, and Starter Checking ; 20 Engine Cooling/Radiator . 20–00 Safety Precautions ; 20–01 Radiator ...SAF-T-LINER C2. Parts Reference Manual ( Interior ) INTRODUCTION. The Thomas Built Buses SAF-T-LINER C2 parts reference manual provides the user with a tool to assist in identifying needed replacement parts and service information for their bus. It is intended to be used as a guide to help locate service parts information that resides within ...Web my 2019 freightliner has a intake heater light that keeps flashing when i hit a bump going down the road or when i accelerate. An intake heater was ordered for this unit wich is a 6hr job all the fuel line need to be removed. Web finally got around to fixing this air heater code engine light turns out it was the spartan mega 250a fuse.Custom-built Freightliner vehicles are equipped with various chassis and cab components. Not all of the information contained in this manual applies to every vehicle. For details about components in your ve-hicle, refer to the chassis specification pages in-cluded in all new vehicles and to the vehicle specifi-cation decal, located inside the ...09 Air Intake . 09–01 Air Cleaner Element Inspection and Replacement ; 13 Air Compressor . 13–00 Safety Precautions ; 13–01 Air Compressor Inspection ; 15 Alternators and Starters . 15–00 Safety Precautions ; 15–01 Alternator, Battery, and Starter Connections Check ; 20 Engine Cooling/Radiator . 20–00 Safety Precautions ; 20–01 ...Benefits of Solar Water Heaters - The benefits of solar water heaters are numerous. Visit HowStuffWorks to learn all the benefits of solar water heaters. Advertisement The benefits...Since coal is usually burned to generate electricity for homes, it can be conserved by using energy-efficient bulbs for lighting and by conserving the energy consumed by house heat...The air intake heater control helps the combustion process while starting in cold temperatures by controlling the heating elements in the engine's intake air system. The ECM controls the heating elements in two phases, pre-heat and post-heat. The amount of time that the intake air heater remains on depends on the intake manifold temperature at ...Mar 21, 2010. #1. Recently I disconnected my battery cables, pulled the speedometer out to look for something else and now my check engine light and engine heater light won't go out and the code it flashes is 49 which is "Inlet Air Heater Driver Fault" (open/closed circuit) or something like that. I called CAT and he said it could be anything ...

Jalama beach webcam.

Discover goodwill letter.

Apr 11, 2011 · First, the heater should come on every time the key is turned to the on position. Then the Engine ECM checks the coolant and intake air temp and if they are high enough, the heater shuts off. Second, the 12volt power that operates the circuit comes from the truck, not the ECM. The most common reason for the heater not to work is a loss of power ... Shows the steps to disable those pesky intake heater lights by disabling grid heater. Remember to key off and let bus go to sleep to fully deactivate.Here are some of the best outdoor heaters for restaurants to keep your customers warm and cozy when they want to dine outdoors to enjoy a meal. If you buy something through our lin... New Design Old Design DDC-SVC-MAN-0040.PDF - MBE 900 ENGINE 2007 OPERATOR'S GUIDE - Freightliner ... Detroit Diesel®To contact Freightliner about a concern about a specific vehicle call the Customer Assistance Cen-ter at 1-800-385-4357 or complete a Product Concern Form. To contact Transport Canada, call the Defect In- ... 6 Heater, Ventilator and Air Conditioner .....6.1 7 …2006 c7 cat intake manifold heater not working. Hi. Thanks for asking your question! I will try and help you out. Most often the problem is no power to the heater relay. This is often caused by a blown fuse. If there is power to the relay. I would suspect a lack of ground from the ECM. Possible broken wire from ECM, of a failed relay.Dec 5, 2023 · nskyline34 Discussion starter. 1706 posts · Joined 2013. #5 · Dec 5, 2023. Well ordered a complete GDP setup - intake manifold, intake horn, and their high flow grid heater. More than I wanted to spend, but the only company that makes them specifically for the C&C trucks and plus I like the idea of the added flow of the intake horn. Nov 6, 2011. #4. Yes, when you turn the key to the run position the gauges will sweep from the lowest values to the highest and the solenoids in the air valves will do a "chuff" test. Then the gauges will go to the positons for the conditions present when the engine is off. I'm not sure of the 5.9 Cummins engine has an intake manifold grid ...18 Manual Transmissions and Clutch. 19 Drive Axles. 20 Fifth Wheels. 21 Trailer Couplings. 22 Headlights. 23 Vehicle Appearance and Care. 24 Pre- and Post-Trip Checklists. 25 Pre- and Post-Trip Inspections and Maintenance. 26 In An Emergency.This discussion is proudly sponsored by: Please support our sponsors and let them know you heard about their products on iRV2. Thread Tools. 10-24-2021, 04:48 PM. BobG88. Senior Member. Join Date: Jul 2016. Location: Murfreesboro, TN. Posts: 356. ….

1. Table 1 MBE 900 Grid Heater Relay Installation Kit (P/N: A9061590004) INSTALLATION PROCEDURE. 1. Make sure that the engine is off (key OFF, engine OFF). 2. Disconnect the batteries. 3. Disconnect the electrical harness connector and …Intake heater light keeps coming o. And off and truck won’t maintain speed. Mechanic's Assistant: Sometimes things that you think will be really complicated end up being easy to fix.For people using gas water heaters, two options are offered--natural gas or propane. According to Energy Star, 15 percent of a home’s energy use is attributed to heating water. Bot...My question is about the air intake heater system on my 2000 Freightliner FL70 that has a Cat 3126 engine. I have had the truck since March of this year. Initially the indicator light for warming the engine when cold stayed on for about 30 seconds as it. was supposed to and the engine started fine. I have a lengthy bit of info I want to include ...813 posts · Joined 2007. #1 · Nov 18, 2009. Started the truck yesterday and check engine light came on. Checked codes with Smarty and there were two of them. They were P2609- No voltage drop seen from intake air heater and P0542- High voltage on the #1intake air heater relay. After checking the codes I noticed that my grid heater is not ...Custom-built Freightliner vehicles are equipped with various chassis and cab components. Not all of the information contained in this manual applies to every vehicle. For details …Freightliner Custom Chassis ... 09 Air Intake . 09–01 Air Cleaner Inspection ; 13 Air Compressor . 13–00 Safety Precautions ; ... 83 Heater and Air Conditioner . 83–00 Safety Precautions ; 83–01 Air Conditioner Inspection ; 83–02 Air Filter Replacement ; 88 Hood, Grille, and Cab Fenders ...New Design Old Design96 Posts. Posted - 01/09/2019 : 3:23:49 PM. Have a 05 Freightliner Cat c7 Engine. Starting hard even when it’s plugged in all of a sudden. Don’t have diagnostics/software. Runs fine once it’s started. Tomorrow going to change the fuel filter and water separator filter as a starting point. Intake heater seems to be cycling as normal. Intake heater light on freightliner, No glow plugs, Cummins uses a grid heater. 07 5.9L 2500 QC/LB 4x4. Edge J/A, Smarty TNT, AFE stage 2/ progaurd 7 filter Arson III 2G intake horn 6" lift 37 13.5 17 SS M-16 5"TBE Full Billet trans., Thanks for the information. The 2 wire sensor is the intake air temp sensor. The 3 wire sensor is the Boost pressure sensor. Thr boost has nothing to do with the intake heater. The other sensor is the coolant temp sensor. It is located in the top of the block on the drivers side. It ia a 2 wire sensor as well., Oct 24, 2021 · This discussion is proudly sponsored by: Please support our sponsors and let them know you heard about their products on iRV2. Thread Tools. 10-24-2021, 04:48 PM. BobG88. Senior Member. Join Date: Jul 2016. Location: Murfreesboro, TN. Posts: 356. , Location: Vista Ca. On a C7 the relay is on the engines intake manifold just above the heater grid. Also there is a fuse-able link in the cable to the relay from the starter. There will be a cable from the air intake heater to the relay solenoid. This solenoid is on the engine., Originally posted by dsalinas1939. i may have put this up before not sure but i have this 2014 c2 and its setting a 3494 code its intake heater mechanical fault i ran down the diagnostic tree and its tellin me it have to take to dealer for next procedure the heater eliment is working fine when i turn key on i hear it click on then off i see it ..., My 2019 freightliner has a intake heater light that keeps flashing when I hit a bump going down the road or when I - Answered by a verified Technician, View and Download freightliner 122SD maintenance manual online. 122SD trucks pdf manual download. Also for: Coronado 132. ... Heater and Air Conditioner 88 ....Hood, Grille, ... Page 32 Air Intake 01/17/2012 f090496 1. Steel Plate 2. Rubber Fig. 6, Mounting Isolator 09/3 122SD and Coronado 132 Maintenance Manual, February 2015..., Cat C7 Intake Heater Relay Signal and Ground New Topic Reply to Topic Printer Friendly, I run four sets of them 2 in the head light and 2 in the fog and the never go out not when starting or grid heater 2001 Dodge 2500 quad cab , Auto, 306,xxx miles, S&B Cold Air Intake, Expandit 5 inch straight piped system, Smarty, Edge Insight CS for gauges , HID Fog Lights 8000k, HID Head Lights 4300k, Electric/Heated tow mirrors, Painted ..., Feb 21, 2017 #1. Confused Light Load Member. 224. 268. Sep 22, 2009. somewhere else. 0. Anyone ever had this intake heater error 1 and 2 code flash up on dash ? If so what …, open a can of worms. essentially there have been. a few cases of the grid heater bolt breaking off and finding a home pounded into the top of cylinder 6. the belief is the bolt loosens and electrical current arcs causing it to fall off, or constant elec current arcs causing it to fall into intake., needing a little help on a FS65 freightliner school bus with a C-7 cat engine have a code of 70-5 intake heater current low need a wiring diagram of the grid heater circuit Thanks John: jperkins Active Member. USA 41 Posts. Posted - 10/12/2010 : 1:51:30 PM . note this is a 2006 model:, I have a 2004 FREIGHTLINER M2-16 with a DT 466 Diesel engine. While driving it it runs fine but at decceleration at almost full stop, it starts shaking and acting up and the intake heater light comes … read more, Gasoline engines use an intake manifold to deliver a fuel and air mixture to each cylinder for combustion. Intake manifolds once were made of cast iron. The biggest problem with ca..., The “wait to start” light comes on ever time during pre-start, but grid heaters never engage. It’s never worked since I bought the MH in 2013. I’ve used block heater to preheat engine prior to starting. Van Willams had this problem in 2015 and he checked all connections in engine room area which ended up resolving the problem., Apr 11, 2011 · First, the heater should come on every time the key is turned to the on position. Then the Engine ECM checks the coolant and intake air temp and if they are high enough, the heater shuts off. Second, the 12volt power that operates the circuit comes from the truck, not the ECM. The most common reason for the heater not to work is a loss of power ... , Mar 21, 2010. #1. Recently I disconnected my battery cables, pulled the speedometer out to look for something else and now my check engine light and engine heater light won't go out and the code it flashes is 49 which is "Inlet Air Heater Driver Fault" (open/closed circuit) or something like that. I called CAT and he said it could be anything ..., I have a 2006 Bluebird Vision with a C7 Cat giving me fits. The "wait to start" light is on constantly KOEO or engine running and the grid heater is never activated at cold start up. If I supply power and ground to the solenoid it activates and the heater works as it should, with the signal wires disconnected I have ground on one and 7.2 Volts ..., The ABS light is a steady burn while cranking but once it fires it flashes for about 30 sec before going off. ... It **might** have an intake heater. It would be on the air intake pipe going in to the engine and have a couple of 2 gauge or so cables gojng to it. ... Freightliner used to bury them under there on the business class trucks. I ..., Optional lights include an intake heater, low brake fluid, low coolant, low fuel, automatic transmission range inhibit, pall filter, differential lock, and wheel spin indicators. Air Filter Indicator The air filter indicator (marked " AIR FILTER ") lights up when the air cleaner filter element is significantly clogged, reducing intake airflow ..., Aug 21, 2018 · Originally posted by dsalinas1939. i may have put this up before not sure but i have this 2014 c2 and its setting a 3494 code its intake heater mechanical fault i ran down the diagnostic tree and its tellin me it have to take to dealer for next procedure the heater eliment is working fine when i turn key on i hear it click on then off i see it ... , The camshaft is made of case-hardened steel and has seven main bearings (five on the 4-cylinder engine). Each cylinder has cams for intake and exhaust valves and a unit pump. The valves are controlled by mushroom tappets, pushrods, and rocker arms. The intake valves are opened and closed by a valve-guided bridge., 808 Posts. Posted - 05/30/2017 : 10:18:04 AM. I have a DT466 that we got back from the dealer . They had to do some work on the engine we installed . There were wiring issues . When we got it back the wait to start light would come on for 5 or 6 seconds and go off . A couple days later went to start the bus the wait to start light wouldn't come ... , FREIGHTLINER M2 Heater Assembly. OEM #: A22-59312-000. SURPLUS RED DOT AUXILARY HVAC A/C HEATER ASSEMBLY FLOOR MOUNTED P/N: A22-59312-000 REPLACED BY P/N: RDH R4225 1. Create Estimate. Part Info. (541)922-6455 Request Info Enterprise Hagerman Inc. UMATILLA OR. $600.00., Gasoline engines use an intake manifold to deliver a fuel and air mixture to each cylinder for combustion. Intake manifolds once were made of cast iron. The biggest problem with ca..., 09 Air Intake . 09–01 Air Cleaner Inspection ; 13 Air Compressor . 13–00 Safety Precautions ; 13–01 Air Compressor Inspection ; 15 Alternators and Starters . 15–00 Safety Precautions ; 15–01 Alternator, Battery, and Starter Connections Check ; 20 Engine Cooling/Radiator . 20–00 Safety Precautions ; 20–01 Pressure Relief Cap Check, EZWiring EZWiring™ makes Freightliner, Sterling, Western Star, Thomas Built Buses, and Freightliner Custom Chassis Corporation products’ wiring drawings and floating pin lists available online for viewing and printing. EZWiring can also be ac-cessed from within PartsPro. Introduction Descriptions of Service Publications, 09 Air Intake . 09–01 Air Cleaner Element Inspection and Replacement ; 13 Air Compressor . 13–00 Safety Precautions ; 13–01 Air Compressor Inspection ; 15 Alternators and Starters . 15–00 Safety Precautions ; 15–01 Alternator, Battery, and Starter Checking ; 20 Engine Cooling/Radiator . 20–00 Safety Precautions ; 20–01 Radiator ..., Intake heater relay activation, low voltage. I have an 03 2500 5.9L MT. The truck is giving P0541. I have removed the relay activation wires and receive only 3V at them when they should see 12V. I have checked the ground, it is fine. I have cleaned the connections and tested the wires. No dice., Here I show how to diagnose a air intake heater circuit on a Cummins Isc Engine, Intake Heater Light: Troubleshooting Tips for Bus & Freightliner | JustAnswer. Ask an Expert. Car Questions. Truck Repair. This answer was rated: ★★★★★. The intake heater light flashes when the bus is cold however… The intake heater light flashes when the bus is cold however once it warms up, it doesn't come back on until the engine cools off., Jan 18, 2023 · 3 posts · Joined 2023. #1 · Jan 18, 2023. I have a 2004 ram 2500 5.9 with 73k miles and a couple months ago the check engine light came on for the air intake heater. I replaced the air intake heater as well as the relays. Light stayed on and would not clear with the scanner. Took it to the dealer and they said the air intake heater and relays ... , Sep 20, 2020 · The air intake heater control helps the combustion process while starting in cold temperatures by controlling the heating elements in the engine's intake air system. The ECM controls the heating elements in two phases, pre-heat and post-heat. The amount of time that the intake air heater remains on depends on the intake manifold temperature at ...