DTC 81

DTC 81: Engine control System (Including PCM) Malfunction

1. 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.

2. Clear the DTCs with the HDS.
3. Test-drive the vehicle with the adaptive cruise control (ACC) activated.
4. 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.