Suzuki Grand Vitara 2011 Manual page 1711

Step
2 1) With ignition switch OFF, disconnect special tools and
SDM connector "L33".
2) Release shorting bar in SDM connector inserting release
tool (1) included in special tool (A).
3) Measure resistance between "L33-1" and body ground,
and between "L33-2" and body ground (for DTC B1323)
or "L33-3" and body ground, and between "L33-4" and
body ground (for DTC B1327) with connected special
tools (B) and (C).
Special tool
(A): 09932–76010
(B): 09932–75010
(C): 09932–78340
"L25", "L30"
(C)
STEERING WHEEL
Is resistance infinity?
Action
"L33-1"
"L33-2" "L33-3" "L33-4"
(A)
(B)
I5JB0A820047-01
Yes
Substitute a known-
good SDM and recheck.
1, (A)
Air Bag System: 8B-80
No
DTC B1323: Repair
short from "GRY/RED"
or "GRY" wire circuit to
ground in floor harness.
DTC B1327: Repair
short from "BRN/WHT"
or "BRN" wire circuit to
ground in floor harness.