Fault Codes/Power Solutions International, Inc./686Power Solutions International, Inc.686UnclassifiedGeneralWhat This Code MeansDTC 686 is activePossible Causes•Faulty Relay•Faulty harness (open - circuit)•Faulty ECMSuggested Actions1Perform On-Board (OBD) System Check2Verify DTC 686 is active with Key ON, Engine Off and System Mode set to 'Stopped'3Remove Relay from fuse block/relay module4Using a DMM, measure the voltage potential from the relay output to ground5Using a DMM, measure the resistance from the relay output to ground with Key Off and harness disconnected from ECMRelated Power Solutions International, Inc. Fault Codes891 4111168511716431172606117356311775241325Browse all Power Solutions International, Inc. fault codes→ASK RUDY ABOUT THIS FAULTGet a diagnosis walkthrough for 686 on your specific Power Solutions International, Inc. unit — cited to the OEM manual, not a forum guess.Your question about 686GET THE ANSWERFree account required — we'll bring your question with you.