( TL19E00H10800012441BAAT10 )

DTC Troubleshooting: 80, 83, 84, 85, 86, 87, 88, 89, 91, 93, 94, 95, 96, 99, 101

Adaptive Cruise Control (ACC) Unit Updating
Special Tools Required

- Honda diagnostic system (HDS) tablet tester
- Honda interface module (HIM) and an iN workstation with HDS and CM update software
- HDS pocket tester
- GNA600 and an iN workstation with HDS and CM update software
  (Any one of the update tools above will work.)

NOTE:

- Use this procedure when you need to update the ACC unit during a troubleshooting procedures.
- Make sure the HDS/HIM has the latest software version.
- Before you update the ACC unit, make sure the battery in the vehicle is fully charged.
- Never turn the ignition switch to LOCK (0) or ACC (I) during the update. If there is a problem with the update, leave the ignition switch to ON (II).
- To prevent ACC unit damage, do not operate anything electrical (headlights, audio system, brakes, A/C, power windows, moonroof (if equipped), door locks, etc.) during the update.
- To ensure the latest program is installed, do an ACC unit update whenever the ACC unit is replaced.
- You cannot update an ACC unit with a program it already has. It will only accept a new program.
- If you need to diagnose the HIM because the HIM's red (#3) lamp came on or was flashed during the update, leave the ignition switch in the ON (II) position when you disconnect the HIM from the data link connector (DLC). This will prevent ACC unit damage.

1. Connect the HDS to the DLC (A).

1. Turn the ignition switch to ON (II), but do not start the engine.

1. Make sure the HDS communicates with the vehicle and the ACC unit. If it does not communicate, troubleshoot the DLC circuit.

1. Select the update program, and follow the screen prompts to update the ACC unit.

1. If the software in the ACC unit is the latest, disconnect the HDS/HIM from the DLC, and go back to the procedure that you were doing. If the software in the ACC unit is not the latest, follow the instructions on the screen.
   NOTE: If you run into a problem during the update procedure (programming takes over 15 minutes, status bar goes over 100 %, D or immobilizer light flashes, HDS tablet freezes, etc.), follow these steps to minimize the chance of damaging the ACC unit :
   - Leave the ignition switch in the ON (II) position.
   - Connect a jumper battery (do not connect a battery charger).
   - Shut down the HDS.
   - Disconnect the HDS from the DLC.
   - Reboot the HDS.
   - Reconnect the HDS to the DLC, and try the update procedure again.

1. Turn the ignition switch to LOCK (0).

1. Disconnect the HDS from the DLC.