DTC 81: Engine Control System (Including PCM) Malfunction Check for PGM-FI System DTCs with the HDS. Are any DTCs indicated?
YES | - | Troubleshoot the indicated PGM-FI system DTC(s).■
NO | - | Go to Step 2 .
Clear the DTCs with the HDS. Test-drive the vehicle with the adaptive cruise control (ACC) activated. Check for DTCs with the HDS. Is DTC 81 indicated?
YES | - | Check for loose or poor connections. If OK, replace the adaptive cruise control (ACC) unit. ■
NO | - | Intermittent failure. The system is OK at this time. Check for loose or poor connections.■