Reading DTC Using "O/D OFF" Lamp

WARNING: This page is about a different car, the 2006 Suzuki XL-7. However, it is still accessible from the selected car via links, so may be relevant.

Turn ignition switch OFF.
Remove steering column hole cover (1).
Using service wire, connect diagnosis switch terminal (3) of monitor connector (2) to ground terminal (4).

Fig 1: Identifying Monitor Connector, Terminals & Steering Column Hole Cover
Courtesy of SUZUKI OF AMERICA CORP.
Turn ignition switch ON.
Read flashing pattern of "O/D OFF" lamp which represents DTC as shown in example below and write it down.

Fig 2: Flashing Pattern - Shift Solenoid Control Circuit High (DTC 21)
Courtesy of SUZUKI OF AMERICA CORP.
After completing the check, turn ignition switch OFF and disconnect service wire from monitor connector.