IK0800284 Service Bulletin/Repair Instructions

IK0800284 - Ambient Air Temperature (AAT) senor faults
Page 1 of 4
Countries :
CANADA, UNITED STATES, MEXICO Document ID: IK0800284
Availability :
ISIS, FleetISIS
Revision:
2
Major System:
ELECTRICAL SYSTEM
Created:
5/16/2011
Current Language: English
Last Modified: 3/5/2013
Other Languages : Français, Español,
Author:
Viewed :
Will (Mark) Wiley
632

Less Info
Coding Information
Hide Details
Copy Link
Copy Relative Link
Bookmark
Add to Favorites
Print
View My Bookmarks
Provide Feedback
Helpful
Not Helpful
80
32
Title: Ambient Air Temperature (AAT) senor faults

Applies To: 2010 EPA MaxxForce® 11 and 13 ProStar® and WorkStar®
DESCRIPTION

There are two ambient temperature sensors. The sensor located behind the cab along the left frame rail is the sensor the engine uses. There is

also a sensor located at the front of the chassis that the gauge cluster uses for the temp display. This article discusses the Engine

AAT Sensor first. Information on the Cab AAT can be found at the bottom of this article.
POSSIBLE DIAGNOSTIC TROUBLE CODES

SPN

171

171

171
FMI

4

3

2
MODULE

Engine

Engine

Engine
DESCRIPTION

AAT signal out of range LOW (Body mounted sensor)

AAT signal out of range HIGH (Body mounted sensor)

AAT signal does not agree with other sensors
LOCATION

The Engine sensor is located on the left frame rail midway between the back of cab and front drive axle, or near the front drive axle. The two

photos below show both possible mounting locations.
https://evalue.internationaldelivers.com/service_kb/DocTool/ArticleViewer.aspx?ControlID... 4/1/2013
IK0800284 - Ambient Air Temperature (AAT) senor faults
Page 2 of 4
ENGINE CIRCUIT DIAGRAM
https://evalue.internationaldelivers.com/service_kb/DocTool/ArticleViewer.aspx?ControlID... 4/1/2013
IK0800284 - Ambient Air Temperature (AAT) senor faults
Page 3 of 4
CAB AMBIENT TEMPERATURE SENSOR

The instrument cluster, connector 1501 pin 9, sends a 5-volt source to the temperature sensor. As the voltage goes across the temperature

sensor it decreases, the amount of voltage drop depends on outside temperature. The reduced voltage then returns to the instrument cluster on

pin 8 of connector 1500. The instrument cluster turns the received signal into to the temperature shown on the display.
CAB SENSOR TROUBLESHOOTING

Note: The Electronic Gage Cluster display will replace temperature reading with two dashes (- -) if a fault is present with the Ambient Temperature

Sensor circuit.
Step
Test Points
Specification
In Spec
NOT In Spec
1
Measure voltage between ambient temperature sensor

connector cavity A and GND
5 +/- 0.5 Vdc
Go to

next step
Inspect wire from cluster 1501-9 to AAT

sensor pin A for open or short
2
Measure voltage between ambient temperature sensor

connecotr cavity A and cavity B
5 +/- 0.5 Vdc
Go to

next step
Inspect ZVR wire from cluster 1500-8 to

AAT sensor pin B for open or short
Actual Ambient Temperature
Resistance value for sensor
50˚C (122˚F)
3557.7 - 3648.2 Ω OHMS
25˚C (77˚F)
9862.5 - 10137.5 Ω OHMS
0˚C (32˚F)
32197 - 33111 Ω OHMS
CAB CIRCUIT DIAGRAMS

IMPORTANT: Due to variations during vehicle production, be sure to select the most current wiring schematic manual, specific to the year and model of the

vehicle being serviced.




ProStar / LoneStar wiring for Cab Sensor

ProStar / LoneStar wiring for Cab Sensor with Front Axle Load Sensor
https://evalue.internationaldelivers.com/service_kb/DocTool/ArticleViewer.aspx?ControlID... 4/1/2013
IK0800284 - Ambient Air Temperature (AAT) senor faults





Page 4 of 4
HPV wiring for Cab Sensor

HPV wiring for Cab Sensor with Front Axle Load Sensor

TerraStar wiring for Cab Sensor
The Cab Temperature Sensor is typically mounted near the front bumper or on the cooling package. If the sensor cannot be found verify the

wiring to the gauge cluster is present.
OTHER RESOURCES




2006-2009 Cummins Ambient Air Temperature Sensor Location

2006-2009 Cummins Active Fault 249 / 256 Ambient Air Temperature Sensor 1 Circuit
Hide Details
Feedback Information

Viewed:
631
Helpful:
80
Not Helpful: 32

No Feedback Found
Copyright © 2013 Navistar, Inc.
https://evalue.internationaldelivers.com/service_kb/DocTool/ArticleViewer.aspx?ControlID... 4/1/2013

SaleBestseller No. 1

OTOFIX D1 Lite 2026 Bidirectional Scan Tool, Bluetooth OBD2 Scanner Diagnostic Tool, 2 Years Free Update, 38+ Services, CANFD & DoIP Protocols, All System Diagnoses, ABS Bleeding, Auto VIN

🎉[OTOFIX D1 Lite, Perfect Cost-effective Diagnostic Tool]: OTOFIX D1 Lite, a newest bidirectional scan tool from OTOFIX company, is a great choice for DIYers and repair shops. 👉This obd2 scanner diagnostic tool packs all practical functions: OE level all systems diagnoses, Bi-Directional Control, 38+ reset services fixing 99% of common problems, support DoIP & CANDF protocols and FCA AutoAuth, high-end hardware configuration. Worldwide vehicles and 🔥2 Years Free Updating🔥 covered.
🎉[Bi-Directional Scan Tool, Active Test]: OTOFIX D1 Lite bluetooth obd2 scanner can also command ECUs and monitor the operation of the actuators to track down the problems of certain parts, like windows, sunroof, wipers, fuel pumps, etc., saving repair time & trouble. This makes OTOFIX D1 Lite the most cost-effective bidirectional scan tool.
🎉[2026 Newest, 38+ Hot Reset Functions]: Equipped with 38+ reset functions in one, the OTOFIX D1 lite automotive scanner diagnostic tool allows you to troubleshoot 99% of common vehicle problems. You can use this car diagnostic scanner holding enough functions to easily repair common vehicle models in your repair shops. Including Oil Reset, Injector Coding, Throttle, DPF Reset, SCR Reset, Gear Learning, Clutch Learning, Suspension, etc. Note* Reset functions vary by model.
🎉[OE Level Full Systems Diagnostics]: Unlike the 2-system and 4-system diagnostic tools, the OTOFIX auto scan tool can complete comprehensive system diagnostics within 5 minutes. It accesses and scans all available onboard systems like for Engine /AT /ABS /EPB /BMS /TPMS /SRS /SAS /Audio System /BCM /Air Conditioning / etc., to read & clear codes, view live data, and check ECU information. Note: Active test is not involved.
🎉[Powerful Hardware Configuration]: Designed with a fashion appearance & a 7” touchscreen and a weight of 463g, this OTOFIX D1 Lite OBD2 diagnostic scanner scan tool is convenient for everywhere and easy to use & store. Android9.0 OS and 2+64GB memory enhance multi-task smoothness and diagnostic operation, no more wasting too much time. 5800mAh battery allows hours-lasting use. WiFi & VCI1 also bring faster communication for your diagnostics.

Bestseller No. 2

OTOFIX D1 Lite Bidirectional Scan Tool with 2-Year Free Updates, 2026 New All System Automotive Diagnostic Scanner, 38+ Reset Services, FCA AutoAuth, Active Test, CANFD&DOIP, Auto VIN

🏆【2026 TOP OBD2 Scanner Diagnostic Tool】OTOFIX D1 Lite wireless obd2 scanner has upgraded hardware configuration and car coverage. The newly upgraded D1 Lite with 🔥OS Android 9.0🔥1.5Ghz 4 core high efficiency processor🔥2GB RAM+64GB ROM large storage🔥5800mAh large battery, more stable and longer lasting diagnostics🔥 38+ Reset🔥action tests🔥full system diagnostic🔥Supports MV105 endoscope🔥21+ Language Supports🔥100000+ vehicle coverage to meet all your daily maintenance needs.
👍【Bi-Directional Control / Active Test】D1 Lite obd2 scanner has bidirectional control(worth $300+), which is the most beloved feature among mechanic. If your headlights or car windows are broken, going to a repair shop will cost a lot of money. You can use D1 Lite to send execution commands to the ECU module and identify the repair status. Such as ABS, car windows, doors, valves, wipers, headlights, etc., effectively shorten diagnostic time and reduce diagnostic costs.
🔥【All Systems Diagnostics, In-depth Checking】This advanced OBD2 Scanner D1 Lite can perform OE-level diagnosis of all systems including engine, transmission, airbag, ABS, ESP, TPMS, gateway, steering, radio, and air conditioning for more than 100 brands. This diagnostic scanner supports essential functions, such as reading ECU version info, reading and clearing fault codes, and reading data streams.With just a simple click, it provides you with accurate and in-depth diagnostics.
🏆【38+ Reset Hot Functions】For repair workshops, holding an OTOFIX D1 Lite Auto scanner is a strong advantage over others. Its 38+ maintenance functions provide various solutions for all module repairs, including Oil Reset, TPMS Reset, Injector Coding, Suspension, Throttle Matching, etc., which will usher your repair business to a new pinnacle. Continuously updating will never make the functionality & compatibility out-of-date.
🏆【150+ Models, 10000+ Car Coverage & 16 Languages】D1 Lite is a comprehensive car diagnostic scan tool, help you to troubleshoot car issues fast for 95% US, European, Asian auto makes. ✅ With frequent updates and optimizations allow D1 Lite to cover more vehicles to meet your needs. ✅ Multilingual menu allows auto mechanics around the world to use it without language barriers. 🚩Note: Kindly send us the S/N of the device to authorize new language updates before changing the menu language.

SaleBestseller No. 3

OTOFIX D1 Lite 2026 Bidirectional Scan Tool, 2 Years Free Update, 38+ Services, All System Diagnostic Scanner, Active Tests, AutoAuth FCA SGW, AutoVIN, CAN FD & DoIP, 99% Car Coverage

【2026 OTOFIX D1 Lite Gives the Best Value for Money】OTOFIX D1 Lite bidirectional scan tool is more FASTER and SMARTER with 2026 Enhanced Hardwares & New Functions! 👍Alternative Bluetooth +USB connect 👍2G+64GB 👍4x ARM Cortex-A35 (1.5GHz) Processor (5X Faster CPU) 👍Android 9.0 OS 👍5G GHz WiFi 👍CANFD&DOIP 👍 FCA AutoAuth 👍38+ Services 👍3K+ Bi-Directional Control 👍Full Systems Diagnose 👍2 Years Update 👍150+ Vehicle Coverage.
👍【Active Tests】 OTOFIX D1 Lite is a bi-directional scan tool that can send commands to, and also receive information from vehicle control modules. This way, you can quickly locate and repair faulty auto parts. For Example: send direct commands to ask the vehicle to turn on/off the radiator fan, lights, sound horn, fuel pump, modulate throttle, open/close windows, operate mirrors and more. *Note that only available tests will be displayed in the menu.
👍【38+ Service Functions】 OTOFIX D1 Lite scan tool offers 38+ of the hottest service functions that are commonly used for car repairs. That include Oil reset/SAS/EPB/BMS/Throttle/ABS bleeding, and 2065-new SUS/ADBLUE/NOX/Headlamp resets (and more) to help restore your car status after repairs are done. Compared to other diagnostic scanners for cars, the OTOFIX D1 Lite scanner is much more fully-featured. *Note that specific functions available depend on the make/model/year of your car.
👍【All System Diagnostics + Cloud Report Management】 This 2026 car scanner OTOFIX D1 Lite provides troubleshooting and data for all ECUs: read/clear DTCs, view graphic live data/VIN, and locate system faults for safe driving. With Cloud Report Management, you can save detailed reports to cloud servers and easily shared them with others via QR codes/emails/text messages. Others can access these reports from any device (smartphones/tablets/PCs …) anytime, and you can better manage repair work.
👍【99% Car Coverage】 This one-station car scanner diagnostic for all cars works on 150+ major car brands across the world. 1) It supports CAN-FD/DoIP protocols: compatible with GMCAVALIER/TRAX/Encore/Envision/GL8(LSY)/CT4/CT5 after 2019; Volvo after 2018; Land Rover/Jaguar after 2017; and BM.W F/G all chassis. 2) For models equipped with security modules (such as Renault & 2018+ FCA SGW), its built-in AutoAuth allows you to easily break diagnostic barriers after registration.

This product presentation was made with AAWP plugin.

Last update on 2026-05-12 / Affiliate links / Images from Amazon Product Advertising API

Buffer Email Facebook Flipboard Hacker News LinkedIn Messenger Mix Pinterest Print Reddit SMS Telegram Tumblr X VK WhatsApp Line Xing Threads Bluesky Copy Mastodon Nextdoor