Sorry for taking too long to answer. First, using your advice, I have verified that I can communicate with the other I2C devices of the MiniIMU-9 v3 using LSM303 library's "Serial.ino" by replacing
as shown in the next figure
Second, I also got the gyroscope running using L3G library's "Serial.ino" making the changes you suggested:
Finally for "MinIMU9AHRS.ino", analogously, replacing
from method Accel_Init() in "I2C.ino" file with
from method Gyro_Init() also in "I2C.ino" file with
I finally got "MinIMU9AHRS.ino" running using the connections mentioned before as shown next
Thank you very much for the time you took to help me out with my project : ).