DTC P0685 (2.4 L Engine) (2017 2018 2019)

DTC P0685  : PCM Power Control Circuit/Internal Circuit Malfunction

NOTE: 

• Before you troubleshoot, review the general troubleshooting information .
• If the problem does not return after you clear the DTC, or if this DTC is stored intermittently, check for loose terminals at the IGP (ECU)/FI MAIIN RLY OUT line connectors before replacing the PCM.

DTC (PGM-FI)

1. Problem verification

   -1. Turn the vehicle to the ON mode.

   -2. Clear the DTC with the HDS.

   -3. Start the engine, and let it idle for 30 seconds.

   -4. Turn the vehicle to the OFF (LOCK) mode.

   -5. Turn the vehicle to the ON mode.

   -6. Check for Pending or Confirmed DTCs with the HDS.

   DTC Description	Confirmed DTC	Pending DTC
   P0685 PCM Power Control Circuit/Internal Circuit Malfunction

   Is DTC P0685 indicated?

   YES 

   The failure is duplicated. Check for any authorized service information related to the DTCs or symptoms you are troubleshooting or substitute a known-good PCM .

   NO 

   Intermittent failure. Check the following items. If the on-board snapshot of this DTC is recorded, try to reproduce the failure under the same conditions with the on-board snapshot .

   • PGM-FI main relay 1
   • PGM-FI main fuse
   • Poor connections or loose terminals between the PCM and the under-hood fuse/relay box
   • Poor or loose PCM ground terminals and connections
   • Poor or loose 12 volt battery cables and connections
   • Check the 12 volt battery