DTC P0685
DTC P0685 : PCM Power Control Circuit/Internal Circuit Malfunction
- Before you troubleshoot, record all freeze data and any on-board snapshot, and 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 line connectors before replacing the PCM.
| DTC Description | Confirmed DTC | Pending DTC | Freeze Frame |
|---|---|---|---|
| P0685 PCM Power Control Circuit/Internal Circuit Malfunction |
DTC (PGM-FI)
- 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 Freeze Frame P0685 PCM Power Control Circuit/Internal Circuit Malfunction Is DTC P0685 indicated?
YES
The failure is duplicated. Update the PCM if it does not have the latest software, or substitute a known-good PCM , then do the repair verification.
NO
Intermittent failure. Check the following items:
- 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 battery cables and connections
- Check the battery
- Repair verification
-1. Start the engine, and let it idle for 30 seconds.
-2. Turn the vehicle to the OFF (LOCK) mode.
-3. Turn the vehicle to the ON mode.
-4. Check for Pending or Confirmed DTCs with the HDS.
DTC Description Confirmed DTC Pending DTC Freeze Frame P0685 PCM Power Control Circuit/Internal Circuit Malfunction DTC (PGM-FI)
Is DTC P0685 indicated?
YES
If the PCM was updated, substitute a known-good PCM , then recheck. If the PCM was substituted, go to step 1.
NO
Troubleshooting is complete. If the PCM was substituted, replace the original PCM . If any other Pending or Confirmed DTCs are indicated, go to the indicated DTC's troubleshooting.