Sunnyorlando Posted June 4, 2023 Report Share Posted June 4, 2023 2017 Edge sport 2.7 Why would my check engine light come in when either traction control or ABS activate? When this happens, either the traction control or ABS indicator flashes as it should, then engine light comes on. This has happened 2x now. The last time I reset the light via ForScan. This time I'm going to wait to see if it cycles off. Either way, I'd like to know if there's more to this. Any feedback on this? Thanks Quote Link to comment Share on other sites More sharing options...
omar302 Posted June 4, 2023 Report Share Posted June 4, 2023 I believe the first question is what code or codes were present before you had it reset? 3 Quote Link to comment Share on other sites More sharing options...
Haz Posted June 4, 2023 Report Share Posted June 4, 2023 Pending feedback on specific Diagnostic Trouble Codes (DTCs), per the 2017 Edge Workshop Manual... The Anti-Lock Brake System (ABS) module originates and The Powertrain Control Module (PCM) originates Relating to the Instrument Panel Cluster (IPC)... Networked Input Messages and Default States NOTE: Whenever a network message is suspected as missing and confirmed by a missing message DTC (U-code), it is important to look for other symptoms that can also be present in the IPC and throughout the vehicle. Once a DTC sets in the IPC , it is helpful to review the complete message list to determine which other modules also rely on the same message and run the self-test for those modules. If the message is missing from other modules, the same or similar lost communication DTC can also be set in those modules. Confirmation of missing messages common to multiple modules can indicate the originating module is the source of the concern or the communication network may be faulted. Network messages can drop out or be missing for a variety of reasons, such as high network traffic on the bus. The IPC incorporates a defined strategy for handling missing network messages based on time. The required time for a network message to be missing differs between the various gauges, indicators and message center displays. The strategy is basically the same for all indication outputs (gauges, indicators or chimes), but differs in the length of time required for the network message to be missing. If a required network message is missing or invalid for less than the programmed length of time, the gauge, indicator or message center display that requires the network message remains at the last commanded state based upon the last network message received. If the messaged input is missing for longer than the programmed length of time, the IPC output (gauge, indicator etc.) reacts according to a pre-defined default action. For example, if the stability-traction control indicator request network message is missing for less than 5 seconds, and the stability-traction control indicator (sliding car icon) was on, the indicator remains in the on state until the next network message is received. If the network message remains missing or invalid for more than 5 seconds, the IPC sets a U-code DTC and the IPC output becomes a default action for the indicator or gauge. The indicator may default on/off or the gauge may default to the rest position. The PCM setting the MIL indicator immediately after an ABS/Traction Control event could be the result of missing Communications Network messages and, given the combination of events, possibly... DTC Fault Trigger Condition-PCM DTC Description Fault Trigger Conditions U0121 Lost Communication With Anti-Lock Brake System (ABS) Control Module The PCM sets this DTC if data messages from the ABS module through the GWM are missing. Possible Sources Communications network concern ABS module BCM PCM PINPOINT TEST A: U0121 A1 VERIFY THE CUSTOMER CONCERN Ignition ON. Verify there is an observable symptom present. Is an observable symptom present? Yes GO to A2 No The system is operating normally at this time. The DTC may have been set due to high network traffic or an intermittent fault condition. A2 CHECK THE COMMUNICATION NETWORK Using a diagnostic scan tool, perform a network test. Did the ABS module pass the network test? Yes GO to A3 No REFER to: Communications Network (418-00 Module Communications Network, Diagnosis and Testing). A3 PERFORM ABS (ANTI-LOCK BRAKE SYSTEM) CONTROL MODULE SELF-TEST Using a diagnostic scan tool, perform a ABS control module self-test. Are any Diagnostic Trouble Codes (DTCs) recorded? Yes REFER to: Anti-Lock Brake System (ABS) and Stability Control (206-09 Anti-Lock Brake System (ABS) and Stability Control, Diagnosis and Testing). No GO to A4 A4 CHECK THE BCM (BODY CONTROL MODULE) DIAGNOSTIC TROUBLE CODES (DTCS) Using a diagnostic scan tool, retrieve the BCM Diagnostic Trouble Codes (DTCs). Are any Diagnostic Trouble Codes (DTCs) recorded? Yes REFER to: Body Control Module (BCM) (419-10 Multifunction Electronic Modules, Diagnosis and Testing). No GO to A5 A5 PERFORM THE PCM (POWERTRAIN CONTROL MODULE) SELF-TEST Using a diagnostic scan tool, perform the PCM self-test. Is DTC P0562 or DTC P0563 recorded? Yes REFER to PCM DTC Chart in this section. No GO to A6 A6 RECHECK THE PCM (POWERTRAIN CONTROL MODULE) DIAGNOSTIC TROUBLE CODES (DTCS) NOTE: If new modules were installed prior to the DTC being set, the module configuration may be incorrectly set during the PMI , or the PMI may not have been carried out. Using a diagnostic scan tool, clear the Diagnostic Trouble Codes (DTCs). Wait 10 seconds. Repeat the PCM self-test. Is DTC U0121 still present? Yes GO to A7 No The system is operating correctly at this time. The DTC may have been set due to high network traffic or an intermittent fault condition. A7 CHECK FOR DTC (DIAGNOSTIC TROUBLE CODE) U0121 SET IN OTHER MODULES Using a diagnostic scan tool, clear all Diagnostic Trouble Codes (DTCs). Ignition OFF. Ignition ON. Wait 10 seconds. Using a diagnostic scan tool, retrieve all Continuous Memory Diagnostic Trouble Codes (CMDTCs) from all modules. Is DTC U0121:00 set in any other module? Yes GO to A8 No GO to A9 A8 CHECK FOR CORRECT ABS (ANTI-LOCK BRAKE SYSTEM) MODULE OPERATION Ignition OFF. Disconnect and inspect all ABS control module connectors. Repair: corrosion (install new connector or terminals – clean module pins) damaged or bent pins – install new terminals/pins pushed-out pins – install new pins as necessary Reconnect all the ABS control module connectors. Make sure they seat and latch correctly. Operate the system and determine if the concern is still present. Is the concern still present? Yes CHECK OASIS for any applicable Technical Service Bulletins (TSBs). If a TSB exists for this concern, DISCONTINUE this test and FOLLOW TSB instructions. If no Technical Service Bulletins (TSBs) address this concern, INSTALL a new ABS module. REFER to: Anti-Lock Brake System (ABS) Module (206-09 Anti-Lock Brake System (ABS) and Stability Control, Removal and Installation). No The system is operating correctly at this time. The concern may have been caused by module connections. ADDRESS the root cause of any connector or pin issues. Of course, feedback of a non-"U" DTC reduces all of this information to a learning opportunity, and then, appropriate DTC-based guidance from the Workshop Manual will be shared. Good luck! 2 Quote Link to comment Share on other sites More sharing options...
enigma-2 Posted June 5, 2023 Report Share Posted June 5, 2023 Transmission speed sensor or harness, is about the only thing that I can think of that would be common to both systems. Quote Link to comment Share on other sites More sharing options...
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