Adaptive Cruise Control (ACC) Unit 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 .

1. Clear the DTCs with the HDS.

1. Test-drive the vehicle with the adaptive cruise control (ACC) activated.

1. 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.■