Manufacturer Code Charts: 111

Adaptive Cruise Control (ACC) DTC Troubleshooting: 111

DTC 111:

Lost Communication With the PCM (A/T System)

1. Check the MIL on the gauge control module Initial Inspection and Diagnostic Overview.

Does the MIL stay on?

YES -

Go to the PGM-FI system's general troubleshooting information Initial Inspection and Diagnostic Overview.

NO -

Go to step 2.

2. Clear the DTCs with the HDS.

3. Press the engine start/stop button to select the ON mode, then wait for 10 seconds.

4. Press the MAIN switch ON.

5. Check for DTCs with the HDS.

Is DTC 111 indicated?

YES -

Go to step 6.

NO -

Intermittent failure, the system is OK at this time. Check for loose or poor connections.

6. Test drive the vehicle, and check the data of vehicle speed signal with the HDS.

Does HDS correspond to the vehicle speed indicated in the gauge control module?

YES -

Go to step 12.

NO -

Go to step 7.

7. Press the engine start/stop button to select the OFF mode.

8. Disconnect the ACC unit 20P connector.

9. Jump the SCS line with the HDS, then disconnect PCM connector B (49P) Service and Repair.

10. Check for continuity between ACC unit 20P connector terminal No. 7 and PCM connector B (49P) terminal No. 47.





Is there continuity?

YES -

Go to step 11.

NO -

Repair an open in the wire between the ACC unit and the branch of the F-CAN B line (F-CAN B H).

11. Check for continuity between ACC unit 20P connector terminal No. 18 and PCM connector B (49P) terminal No. 48.





Is there continuity?

YES -

Replace the PCM Service and Repair.

NO -

Repair an open in the wire between the ACC unit and the branch of the F-CAN B line (F-CAN B L).

12. Press the engine start/stop button to select the OFF mode.

13. Disconnect the ACC unit 20P connector.

14. Jump the SCS line with the HDS, then disconnect PCM connector A (49P) Service and Repair.

15. Check for continuity between ACC unit 20P connector terminal No. 10 and PCM connector A (49P) terminal No. 48.





Is there continuity?

YES -

Go to step 16.

NO -

Repair an open in the wire between the ACC unit and the branch of the F-CAN A line (F-CAN A H).

16. Check for continuity between ACC unit 20P connector terminal No. 20 and PCM connector A (49P) terminal No. 49.





Is there continuity?

YES -

Replace the PCM Service and Repair.

NO -

Repair an open in the wire between the ACC unit and the branch of the F-CAN A line (F-CAN A L).