Suzuki GRAND VITARA Owner's Manual page 1233

DTC Troubleshooting
Step
1 1) With ignition switch OFF, disconnect contact coil
connector located under of the steering column.
2) Check proper connection to contact coil at terminal in
"G26" or "G27" connector.
3) If OK, then connect special tools (B) and (C) to "G26"
connector (For vehicle without cruise control system [A])
or special tools (B) and (D) to "G27" connector (for
vehicle with cruise control system [B]) disconnected in
Step 1).
Special tool
(B): 09932–75010
(C): 09932–78340
(D): 09932–77320
[A]
(C)
BASE OF COLUMN
(B)
4) Check SDM DTC.
With ignition switch ON, is DTC B1031 indicated?
Action
[B]
"G26"
PASSENGER
DRIVER
(D)
BASE OF COLUMN
(B)
Yes
Go to Step 2.
"G27"
I5JB0A820026-02
Air Bag System: 8B-31
No
Go to Step 3.