BCM Self-Diagnosis Function: Notes

WARNING: This page is about a different car, the 2004 Suzuki XL-7 and 2004 Suzuki Grand Vitara. However, it is still accessible from the selected car via links, so may be relevant.

BCM diagnoses conditions of the system component parts and its circuit (whether or not there is any abnormality) all the time and indicates the results (warning of abnormality occurrence and DTC) through the "Clock/Temp. display" as described below.

When an abnormality in the system is detected, "Clock/Temp. display" (1) keeps flashing and the area where that abnormality lies is stored in the memory of EEPROM in BCM.

Fig 1: Clock/Temp. Display Flashing
Courtesy of SUZUKI OF AMERICA CORP.
When Diagnosis switch terminal (3) of BCM monitor connector is grounded, the abnormal area is output as DTC. If any malfunction code is existing, "Clock/Temp. display" (1) indicates DTCs in number order at every 3 seconds.

Fig 2: Clock/Temp. Display Indicating DTCs
Courtesy of SUZUKI OF AMERICA CORP.

Fig 3: BCM System Condition Table
Courtesy of SUZUKI OF AMERICA CORP.