BCM Self-Diagnosis Function: Notes

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

BCM monitors conditions of the system components and its circuit with ignition switch turned to ON position. When an abnormality in the system occurs, the area where that abnormality lies is stored in the memory of EEPROM in BCM.
DTC can be checked in either one of following ways.
- DTC can be checked by SUZUKI scan tool (2) connected to DLC (1).
- DTC can be read from flashing pattern of theft deterrent light (3). In addition, when theft deterrent light is flashing for DTC outputting DTC is displayed on combinations meter (4) at the same time.
  
  Fig 1: Connecting Scan Tool To DLC
  Courtesy of SUZUKI OF AMERICA CORP.