DTC Troubleshooting: 110, 111

Adaptive Cruise Control (ACC) Unit DTC 110: Lost Communication with the PCM (PGM-FI System) Adaptive Cruise Control (ACC) Unit DTC 111: Lost Communication with the PCM (A/T System) 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 .
Check the DTCs with the HDS. Turn the ignition switch ON (II) and main switch ON. Check for DTCs with the HDS. Is DTC 110 or 111 indicated?
YES | - | Go to Step 5 .
NO | - | Intermittent failure. The system is OK at this time. Check for loose or poor connections.■
Turn the ignition switch OFF. Disconnect the 20P connector from the adaptive cruise control (ACC) unit. Disconnect PCM connector A (31P). Check for continuity between the adaptive cruise control (ACC) unit 20P connector No. 10 terminal and PCM connector A (31P) No. 11 terminal. Is there continuity?
YES | - | Go to Step 9 .
NO | - | Repair an open in the wire between the adaptive cruise control (ACC) unit and the branch of the F-CAN line (CANH).■

Check for continuity between the adaptive cruise control (ACC) unit 20P connector No. 20 terminal and PCM connector A (31P) No. 24 terminal. Is there continuity?
YES | - | Check for loose or poor connections. If OK, replace the adaptive cruise control (ACC) unit. ■
NO | - | Repair an open in the wire between the adaptive cruise control (ACC) unit and the branch of the F-CAN line (CANL).■