The on-board diagnostic system external tester communication function transmits data between an external tester and each control module of the vehicle.
Because the DTCs recorded in the vehicle can be read by an external tester, determination of a malfunction location is facilitated.
A connector (DLC-2) conforming to International Organization for Standardization (ISO) standards has been adopted.
A connector shape and 16-pin terminal arrangement as stipulated by the ISO 15031-3 (SAE J1962) international standard has been adopted for this DLC-2.
| Terminal | Function |
| A | Battery positive voltage |
| B | AFS control module (With headlight auto leveling system) |
| C | SAS control module |
| D | — |
| E | HS CAN communication line Lo |
| F | HS CAN communication line Hi |
| G | — |
| H | Serial communication ground |
| I | — |
| J | Body ground |
| K | MS CAN communication line Lo |
| L | MS CAN communication line Hi |
| M | — |
| N | — |
| O | — |
| P | — |