w102acd Posted yesterday at 12:00 PM Report Share Posted yesterday at 12:00 PM Hello all! I have 2019 Edge ST with 124,000 miles that we just got from my in laws. We went on vacation for a week and it sat. We came home to a low driver side rear tire (25 psi) warning. I put air in it and the low tire message went away, but immediately had the "AWD Malfunction Service Required" for the past week. The car seems to be driving the same, but I can't get rid of the message. I tried my OBD reader (cheap Amazon one) and no codes. I tried unplugging the battery for ~15 minutes (positive only) and that didn't get rid of it. I stopped by Autozone and they said their reader wouldn't be able to tell them anything either. The only option left (that I can think of) is to take it to a dealer and have them look. I'm not a fan of that because they always find things $2000-3000 in things that need repaired regardless of what I bring it in for. It seems like the AWD message is related to the low tire message since they happened at the same time. Is there a way for me to remove/reset the AWD message? My intent would be to see if it comes back. Anything else that I should check before taking it in? Since it appears to be driving fine, should I be concerned about driving it? The tires are also close to needing replaced and have read that might be the issue as well. Do I really need to go to a dealer for this? Thanks in advance! Quote Link to comment Share on other sites More sharing options...
1004ron Posted yesterday at 12:54 PM Report Share Posted yesterday at 12:54 PM Welcome. Use your OBDII dongle with the free app FORScan Lite and scan for codes. 1 Quote Link to comment Share on other sites More sharing options...
w102acd Posted yesterday at 03:17 PM Author Report Share Posted yesterday at 03:17 PM Thanks for the reply! I have an el cheapo OBD2 scanner and don't get any codes: https://www.amazon.com/ANCEL-AD310-Enhanced-Universal-Diagnostic/dp/B01G5EA74I/ref=sxin_17_pa_sp_search_thematic_sspa?content-id=amzn1.sym.b747a510-73a1-4cf4-a45b-74fc1ab8af95%3Aamzn1.sym.b747a510-73a1-4cf4-a45b-74fc1ab8af95&cv_ct_cx=obd2+dongle+forscan&hvadid=725841564141&hvdev=c&hvexpln=67&hvlocphy=9015812&hvnetw=g&hvocijid=17226922833890435540--&hvqmt=b&hvrand=17226922833890435540&hvtargid=kwd-2385225293896&hydadcr=6388_13390662&keywords=obd2+dongle+forscan&mcid=185d8463bea6309999e1499a76cc7e37&pd_rd_i=B01G5EA74I&pd_rd_r=49840cad-6cbc-4ec2-b1f1-d7de65722e4e&pd_rd_w=N31ds&pd_rd_wg=ma4kM&pf_rd_p=b747a510-73a1-4cf4-a45b-74fc1ab8af95&pf_rd_r=SP2MGEJ6TZYDQRWWNQ2E&qid=1744643548&sbo=RZvfv%2F%2FHxDF%2BO5021pAnSA%3D%3D&sr=1-1-6024b2a3-78e4-4fed-8fed-e1613be3bcce-spons&sp_csd=d2lkZ2V0TmFtZT1zcF9zZWFyY2hfdGhlbWF0aWM&psc=1 I'm completely open to buying a OBD2 dongle, but can you help me with what exactly to buy. Just to confirm, this is a wireless device that plugs into the OBD2 port and I connect wirelessly to my iPhone? Like this?: https://www.amazon.com/TOPDON-Bluetooth-Diagnostic-Performance-Bidirectional/dp/B0C3QQYQ1B/ref=sr_1_22_sspa?dib=eyJ2IjoiMSJ9.oSZcGr4VWn2_jjxpg3u0MHdHiDsZNns4gwmmZxl-iAYqCBbVT-DOtbbi6s77uyIvzwU6_wAzNjA_Xv2EnxDHp-9L6AZc8m9ne-_5KP3aq57IjPB2HFGL7gRwfqwwHjpDNyfu3tcdj_lWoBdy5aNVWPX7wS2QKehooQecUyjhNgbt_rcTw4Kl6YOOqnns8W1IDMf2Xkn56gmUiVy5s1xWbYt32hbhveNzGeoLPb7sl8mYu54FwKxwPIKY4OzPVUnpIvqM4t3BLsNAdirnRveGmQbUk9AH7AYENMwFChuI99w.ePVmBlIWinRSNo7txHBQBtdu-c8aRRMArQkb9KdIesE&dib_tag=se&hvadid=725841564141&hvdev=c&hvexpln=67&hvlocphy=9015812&hvnetw=g&hvocijid=17226922833890435540--&hvqmt=b&hvrand=17226922833890435540&hvtargid=kwd-2385225293896&hydadcr=6388_13390662&keywords=obd2+dongle+forscan&mcid=185d8463bea6309999e1499a76cc7e37&qid=1744643548&sr=8-22-spons&sp_csd=d2lkZ2V0TmFtZT1zcF9tdGY&psc=1 1 Quote Link to comment Share on other sites More sharing options...
Wubster100 Posted yesterday at 04:02 PM Report Share Posted yesterday at 04:02 PM Please see supported adapters at forscan.org. The most reliable way is to use a wired adapter with a Windows computer. Supported adapters : OBDLink EX USB, recommended USB adapter for Windows version of FORScan, also for configuration and programming functions OBDLink MX+ BT, recommended Bluetooth adapter for Lite versions of FORScan (iOS, Android) OBDLink SX/LX/MX ELS27 (STN1170/2120) ELM327-compatible (fully compatible with original ELM327, please also see important note below) J2534 Pass-Thru Quote Link to comment Share on other sites More sharing options...
Haz Posted yesterday at 05:25 PM Report Share Posted yesterday at 05:25 PM (edited) Welcome to the Forum @w102acd! From the 2019 Edge Workshop Manual, with emphasis added... Placing your device cursor over underlined acronyms may yield popup full-words descriptions of the acronyms. Spare Tire And Mismatched Tire Sizes Major dissimilar tire sizes between the front and rear axles could cause the AWD system to stop functioning and default to FWD or damage the AWD system. It is recommended to reinstall a repaired or replaced road tire as soon as possible. When a mismatched or tire of the wrong size is fitted, an AWD OFF message may appear in the IPC . If this condition occurs, a DTC is set and an AWD OFF message is displayed on the message center. If there is an AWD malfunction service required message in the message center from using a spare or mismatched tire, this indicator should turn off after reinstalling a tire of the same size as the normal road tire, then cycling the ignition OFF and ON. AWD Control And Fault Indicators The AWD system consists of a Power Transfer Unit (PTU), driveshaft, front and rear halfshafts, AWD module, RDU with integral RDU coupling. The systems uses the AWD module for AWD control logic. Using inputs from various modules and systems, when the power transfer unit is engaged the AWD module sends a command to the RDU which controls the amount of torque applied to the to the rear wheels. AWD system faults are indicated by a driveline icon indicator in the IPC as well as the AWD malfunction service required message in the message center. The following is Workshop Manual guidance on retrieving AWD-related Diagnostic Trouble Codes (DTCs)... Inspection and Verification NOTE: For most AWD System DTCs to set, the AWD module must detect the fault on 2 consecutive trips. 1) Record and clear DTCs from the AWD module. 2) Accelerate the vehicle from 0-45 mph with light (10%) APP. 3) Maintain 45 mph for 10 seconds. 4) Gently slow to a stop. 5) Repeat steps 2-4. 6) Accelerate the vehicle from 0-45 mph with moderate (30%) APP. 7) Maintain 45 mph for 10 seconds. 8) Gently slow to a stop. 9) Repeat steps 6-8. 10) Turn off ignition, wait 1 minute. 11) Repeat steps 2-9 or until an AWD fault message is displayed in the IPC . Whichever is sooner. 12) Retrieve continuous memory DTCs from the AWD module. If no DTCs are present, the concern may be intermittent. Do not perform a pinpoint test unless the concern is present. Good luck! Four-Wheel Drive Systems - Overview - 2019 Edge Workshop Manual.pdf Four-Wheel Drive Systems - System Operation and Component Description - 2019 Edge Workshop Manual.pdf Edited yesterday at 05:26 PM by Haz 1 1 Quote Link to comment Share on other sites More sharing options...
w102acd Posted yesterday at 07:46 PM Author Report Share Posted yesterday at 07:46 PM Ordered the recommended USB adapter. How do I "clear the DTCs from the AWD module"? That's where I'm stuck at the moment. I assume I need the USB adapter to do this? We've continued to drive it without any issues. 1 Quote Link to comment Share on other sites More sharing options...
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