DTC Troubleshooting: 110, 111
DTC 110:
 Lost Communication with the ECM/PCM (PGM-FI System)
DTC 111:
 Lost Communication with the PCM (A/T System)
  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. Turn the ignition switch to ON (II) and main switch to ON.
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.■
  1. Turn the ignition switch to LOCK (0).
  1. Disconnect the 20P connector from the adaptive cruise control (ACC) unit.
  1. Check for continuity between the ACC unit 20P connector No. 10 terminal and ECM/PCM connector A (49P) No. 3 terminal.
Is there continuity?
YES -
Go to Step 9 .
NO -
Repair an open in the wire between the ACC unit and the branch of the F-CAN line (CANH).■
  1. Check for continuity between the ACC unit 20P connector No. 20 terminal and ECM/PCM connector A (49P) No. 4 terminal.
Is there continuity?
YES -
Check for loose or poor connections. If the connections are OK, update the ACC unit, then recheck. If the ACC unit was already updated, replace the ACC unit. ■
NO -
Repair an open in the wire between the ACC unit and the branch of the F-CAN line (CANL).■