Inflating Tires for Low Tire Pressure Indication Is Not a
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1. Choose the vehicle model year then click on CONTINUE pn Choose the vehicle trim level then click on CONTINUE 6 Choose your search type you can search by either carrier or device manufacturer then click on CONTINUE Yov ll see a list of all current model phones that have been tested with the Acura HFL system If you don t see the phone that you re working with on this list look under the Currently Testing list and the Archived Phones list If you don t see your phone listed anywhere on the website consider it to be incompatible with the HFL system SEARCH BY CARRIER SEARCH BY MANUFACTURER CURRENTLY TESTING ARCHIVED PHONES 5 of 6 7 If you see the phone model that your client is using click on it You ll see the HFL supported features for that phone A POU a NOTES e The approved archived and currently testing phone model lists are always changing so make sure you check them whenever you ve got a vehicle with an HFL issue e New phones are added as they re approved e A phone can be removed from the approved list if a software bug is discovered that makes that phone incompatible The phone can be added back to the approved list if the device manufacturer fixes the bug e lf the software bug is fixed a new software version is created and may be listed in the Supported Features section of the phone e The Acura website now includes the software versions that are2. This article is the first of a five part series of articles to help you understand the HFL system and to troubleshoot problems tied to it We begin the series with a discussion on how to check a cell phone s compatibility with the HFL system In future articles we ll show you how to troubleshoot problems with pairing problems with dropped calls and problems with receiving and placing calls And finally as an extra bonus we re going to toss in a handy glossary of terms that deal specifically with the HFL system Checking Cell Phone Compatibility The HFL system works only with approved Bluetooth enabled cell phones with a hands free profile The most important step in troubleshooting an HFL problem is to identify your client s cell phone model the software version it s loaded with and your client s wireless carrier Not all cell phones with Bluetooth and a hands free profile are compatible with the HFL system If you re not sure that the cell phone you re working with is compatible with the HFL system call HandsFreeLink Consumer Support at 888 528 7876 and a representative will answer your questions You can also visit their website at www acura com handstreelink Here s the best way to make sure that the phone you re working with is compatible 1 Log onto www acura com handsfreelink 2 Click on Find a Phone 3 Choose the vehicle model that you re working on then click on CONTINUE November 2007 4
3. of 6 Excessive Steering Wheel Shimmy cont d Often the wheel vibration is intermittent because of tire phase matching Steering Wheel Shimmy Steering wheel shimmy can be caused by static tire imbalance Static balance is simply the wheel s weight distribution while it s at rest When one part of the wheel the tire rim hub or brake disc is heavier by more than 7 grams you can feel this as a shimmy If one wheel is out of balance the shimmy will be constant If two wheels are out of balance it will be intermittent because of phase matching You may notice that the vibration tends to come and go more often when driving on curved roads This is a good indication of phase matching In the next issue of ServiceNews we ll discuss phase matching in a lot more detail Security System Sounds by ltself Currently Applies To 07 08 MDXs 07 08 RDXs 05 08 RLs 04 08 TLs and 04 08 TSXs When the security system sounds the B CAN stores the last input Security breach history data that set off the alarm If you ve got a vehicle in your shop because the security system sounded by itself for no apparent reason you can use the HDS to access that stored history data to help you find and fix the problem Once you ve found and fixed the problem you ll then want to use the HDS to clear that history data before you wrap things up Here s how you do it To access the last security breach history
4. real cure is tire replacement Constant Vibrations A badly mounted tire bead can cause vibrations that you can feel right through the seat the floor and the steering column while driving The steering wheel can also shimmy In rare cases more than one tire can be the culprit If the tire looks new and you suspect a badly mounted bead you need to measure the tire rim runout if you ve got access toa Hunter GSP 9700 wheel balancer If you don t have access to one you need to mount a known good stock tire and rim and test drive your customer s vehicle under the same conditions that are listed on your RO We ll be discussing exactly how to do this in future articles of this series Intermittent Vibrations Vibrations that you can feel while driving that come from tires rims hubs and brakes happen when you re going 50 mph or faster And they tend to get stronger when you reach about 70 mph NOTE If you feel the vibration only when you re driving between 45 and 55 mph this article doesn t apply You may be dealing with a vibration from another source Intermittent wheel vibration normally isn t affected by these factors e Engine speed e Gear selection this includes Neutral e Engine load e Hill climbing e Acceleration e Deceleration But if it is affected by one these factors then stop right here You may be dealing with a vibration from another source exhaust engine A C etc cont d 3
5. tested and approved When software versions are listed you need to know which version is loaded on the phone that you re working with to help you troubleshoot your clients complaint If you can t get onto the Acura website call HandsFreeLink Consumer Support at 888 528 7876 for further help It s open Monday thru Friday from 6 00 a m to 6 00 p m CST Saturday from 7 00 a m to 6 00 p m CST and Sunday from 8 00 a m to 6 00 p m CST In the next issue of ServiceNews we ll discuss what to do when you have pairing issues DE PIN E DACURA J ZKULE AN gibs t 2007 American Honda Motor Co Inc All Rights Reserved Published by AHM Parts and duc Service Communications 1919 Torrance Blvd Torrance CA 90501 2746 All suggestions become the property of American Honda Motor Co Inc sending a suggestion gives Honda permission to publish it without further consideration BSN 38291 0711 WE SUPPORT VOLUNTARY TECHNICIAN CERTIFICATION THROUGH National Institute for AUTOMOTIVE SERVICE EXCELLENCE
6. you park the vehicle and those tires start to cool the spot that s touching the ground the tire s footprint flattens and the cords around that spot relax as the tire presses down from the weight of the vehicle The cords at the top of the tire however are held at their maximum tension If it s cold overnight or you don t drive the vehicle for a while the tire will remember its position forming a flat spot After a cold start the axle rises and falls in response to that flat spot causing a noticeable vibration But as tire warms up it softens and normally rounds out With the axle now riding steady the vibration goes away November 2007 A flat spot can be just temporary where the tire rounds out after it warms up But sometimes it can also be permanent in which the tire s memory effectively destroys its ride quality A flat spot s severity often depends on the tire s size its construction the load it s under the ambient temperature and how long it s been sitting and at what temperature If the tire has a temporary flat spot don t replace the tire just because of it Of course if that flat spot is permanent the only real cure is tire replacement Abrasion Related Flat Spots Tires can also develop flat spots if the brakes lock up causing them to skid This is more likely to happen in vehicles without ABS or VSA or if you misuse the parking brake Since these flat spots are obviously permanent the only
7. DACURA SeKUIEeNetys November 2007 Helping you fix it right the first time every time Inflating Tires for Low Tire Pressure Indication s Not a Warranty Repair Currently Applies To Acura models with TPMS Throughout this year we ve run a handful of articles telling you about the low tire pressure indicator in Acura vehicles with TPMS And in each of those articles we ve hammered home the point that this indicator is like a low fuel indicator for the tires its sole purpose is to warn you that one or more of the tires is low on air We ve also stressed that any repairs claimed for low tire pressure or normal tire pressure loss is not covered by Acura warranty unless the cause is traced to a manufacturer defect Yet we keep seeing warranty claims for inflating the tires just to turn off that little indicator According to NHTSA regulations the low tire pressure indicator must come on when the tire pressure is 25 percent below the listed recommended cold inflation pressure To guard against tolerance variations the low tire pressure indicator in Acura vehicles with TPMS is set to come on when the tire pressure drops to around 20 percent All Acura O Ms recommend that the tire pressures be checked and set at least once per month And they should be checked cold which means that the vehicle has been sitting for at least 3 hours or driven for less than 1 mile All tires even those in good condition lose tir
8. at window film is the culprit here s a tip Try lowering the windows all the way down If the problem goes away the window film is blocking the signal NOTE This tip won t work for reception problems associated with the audio unit AM FM and XM or the GPS antenna For those problems you need to find out what type of window film was applied Blue Arrows Mean One Way Traffic Currently Applies To 08 MDXs RDXs RLs TLs and TSXs Here s something to kick up your product knowledge The navigation system has a new feature that displays blue arrows to indicate one way traffic This feature works only when you select ICON OPTIONS from the icon bar Other icons from the Select category for icon settings screen and ONE WAY 1 20 mile from the Select other icons screen ONE WAY TRAFFIC TTI MAP MENU Male Voice Prompts Gone From 08 Navi DVDs Currently Applies To 05 08 MDxXs 07 08 RDXs 05 08 RLs 07 08 TLs and 06 08 TSXs Here s something you need to know about To make room for more points of interest and other features we ve removed all male voice prompts from current 08 production navigation systems This also applies to the white and green navigation system update DVDs that are available from the Honda Navigation Disc Fulfillment Center so it affects owners of older vehicles who want to upgrade their DVDs As a result the navigation system user s manual in some early produc
9. data 1 Connect the HDS to the 16P DLC 2 Turn the ignition switch to ON Il 3 From the System Selection Menu select BODY ELECTRICAL 4 From the Mode Menu select Security 5 From the Security Menu select HISTORY DATA 6 Scroll down and select the last entry posted To clear the last security breach history data after you ve found and fixed the problem 1 Return to the Security Menu and select HISTORY CLEAR 2 Turn the ignition switch to LOCK 0 3 Disconnect the HDS 4of6 Accessory Trunk Spoiler Is Loose or Lifting Up Currently Applies To 04 08 TLs If you get a vehicle in your shop with an accessory trunk spoiler that s loose that s lifting up on either end or bowing in the middle or is doing both check to see if the flange nuts are securely in place and tighten them if needed If the trunk spoiler is still loose or lifting up chances are it wasn t installed properly and the holes for the studs are misaligned To fix the problem you ve got to replace the spoiler since the adhesive from the original one is probably no good For a quality job make sure you follow the installation instructions carefully Clean the trunk lid then use the two templates A and B from the kit to see if the original holes in the trunk are properly aligned If they are go ahead and mount the replacement spoiler and torque the flange nuts to spec If they aren t properly aligned use a round file to open
10. e pressure naturally for a number of reasons but mainly because they re porous It s common to lose up to 1 5 psi per month Secondly it s a scientific fact that tire pressure drops with a drop in temperature You can count on a loss of 1 psi for every 10 degrees of temperature drop Here s what can typically happen It s August 1 and the outside temperature is a balmy 80 F The vehicle owner checks and sets his or her tire pressures to 32 psi just like it says on the driver s doorjamb sticker and in the O M We fast forward to November 1 and the outside temperature is now a nippy 50 F The owner checks the tire pressures but now they re reading only 25 psi and on top of that the low tire pressure indicator in the dashboard is on and the TPMS control unit has set a low tire pressure DTC It s really the vehicle owner s responsibility to check and set the tire pressures otherwise that low tire pressure indicator is going to be coming on And in cold weather that could happen a lot If you get a vehicle in your shop because the low tire pressure indicator is on or has been intermittently coming on before you start any sort of troubleshooting remember what that low tire pressure indicator is telling you It s not saying there s a problem with the TPMS so hold off on heavy troubleshooting To make things right first check the tire pressures If they re lower than the recommended cold inflation pres
11. easured weight for seat weight sensor calibration It weighs about 58 pounds Nevertheless always check the actual weight before entering it in the HDS No Negative A F Sensor Output With Gen Scan Tools Currently Applies To 07 MDXs and 07 TLs Here s something you need to keep in mind when troubleshooting If you re using a generic scan tool to read the A F sensor output the tool doesn t show you negative rich values Whenever the output is negative you ll always see 0 mA Interior Lights Stay On With Doors Closed Currently Applies To 07 RDXs A bad multiplex integrated control unit MICU in the drivers under dash fuse relay box can cause the interior lights to stay on when e The front ceiling light switch is in the door activated center position e All the doors are closed e The ignition switch is turned to LOCK 0 When you slide the front ceiling light switch to the off position the interior lights go out To fix this problem replace the MICU November 2007 Excessive Steering Wheel Shimmy or Chassis Vibration Part 2of 5 Last month we introduced the first article in a five part series that will look at the whole issue of steering wheel shimmy and chassis vibration and what it takes to fix the problem In that article we gave youa step by step procedure to test drive your service client s vehicle The final step of that procedure was to test drive a known good vehicle and compare
12. sures fill the tires to their recommended pressures If the low tire pressure indicator stays on after you ve done that drive the vehicle over 30 mph for about 1 minute the indicator should go out If it goes out you re done with this repair If it stays on or you suspect there s a leak then it s high time to start troubleshooting And although one or more of the low tire pressure TPMS DTCs 11 13 15 or 17 will have been set in the TPMS control unit don t bother clearing them they just stay in memory So here s the bottom line The low tire pressure indicator is like a low fuel indicator for the tires Normal tire pressure loss is not covered by Acura warranty unless it s traced to a manufacturer defect So that means adding air to the tires just to turn off the indicator is not a warranty repair Think of it as just a maintenance thing it s really no different than filling up the fuel tank when the low fuel indicator comes on Window Film Can Block Electronic Device Signals Many aftermarket high performance metallic and ceramic automotive window films can actually block signals associated with common electronic devices such as cell phones a GPS antenna for a navigation system or keyless remotes They can also create audio reception issues and even interfere with a tire pressure monitoring system If you re working on an Acura vehicle for a keyless remote or a TPMS problem and you suspect th
13. tion 08 vehicles may show the SETUP screens that were available to change the voice prompt from female to male Future releases of those manuals will be revised to eliminate that option And if that s not confusing enough some early production 08 vehicles may have come with a 07 production navigation system DVD which includes those now absent male voice prompts If the vehicle also came with a 2nd release navigation system users manual that manual won t match the DVD since it mentions nothing about those prompts 2of6 SRS Indicator On With SRS DTC 81 79 After Body Work Currently Applies To 03 08 MDXs 07 08 RDXs 05 08 RLs 05 08 TLs and 06 08 TSXs Got a vehicle that s back from the body shop with the SRS indicator on and SRS DTC 81 79 front passenger s weight sensors drift check failure front passenger s weight sensors initial check failure Binding of the seat base the seat weight sensors or both can cause this problem Here s how you fix it 1 Loosen all four front passenger s seat base mounting bolts 2 Grab a hold of the seat and give it a good shaking This neutralizes the seat base 3 Tighten the seat base mounting bolts according to the applicable S M 4 Do the seat weight sensor calibration procedure in the applicable S M using the measured weight Handy Tip A case 6 gallons of Acura Precision Crafted Longlife Antifreeze Coolant Type 2 makes an ideal m
14. up the holes until they are then apply paint to the holes to prevent rust When the paint is dry mount the replacement spoiler and torque the flange nuts to spec A Troubleshooting Guide to HandsFreeLink Part 1 of 5 Currently Applies To All 06 08 vehicles with HandsFreeLink One of the cool features that reminds us the future is now is Acura s HandsFreeLink HFL system With a compatible Bluetooth cell phone you can receive and place calls while driving and never have to take your hands off the steering wheel As with any new cutting edge technology though it comes with a price The HFL system can be a tough challenge to troubleshoot and repair HFL system problems are complicated by the fact that it s only one part of a much bigger system You re not just dealing with the HFL system in the vehicle but also your service client s cell phone the navigation system if the vehicle has it and even how your client works the HFL system some problems simply stem from pilot error And something else you need to keep in mind The HFL system uses the cell phone to provide hands free operation it does nothing to kick up performance Any problems with static poor signal strength poor sound quality or dropped calls are the cell phone s or their wireless carrier s doings and not something you can fix by tinkering with the HFL system cont d November 2007 A Troubleshooting Guide cont d
15. your two test drives If your client s vehicle was similar or better than the known good you were told the vibration was a normal characteristic of the vehicle This article deals with the situation where your client s vehicle was noticeably worse than the known good Before you can move ahead you ve got to interpret the vibration Cold Start Vibrations Temperature Time Related Flat Spots When you park a vehicle overnight in cold temperatures or park it for a few days weeks or months the tires can form what are commonly called flat spots These flat spots can cause a noticeable vibration when traveling at low speeds that goes away after just a few miles of driving Due to their construction and materials many heavy duty and high performance tires have a memory meaning they continue to remember the position in which they were last parked when you begin driving again Unfortunately that memory can become a problem when the tires go through wide swings in ambient temperature or they ve been sitting overnight in cold temperatures or for a long period of time When a tire is suspended in the air there s no load on it each of the sidewall cords has the same tension As the tire rolls on the ground each of those sidewall cords goes from a relaxed state to a loaded state for every rotation And this happens about 800 times every mile This constant deflection generates heat which makes the tires more flexible But once
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