Suzuki Grand Vitara 1998, Service Manual

Page: 729 / 801

YH4
GRAND
VITARA
1. DLC
2. Scan tool
1. “W/B” wire terminal
AIR BAG SYSTEM 10B-23
TABLE D – SDM CANNOT COMMUNICATE THROUGH THE SERIAL DATA CIRCUIT
(Page 2 of 2)
STEP ACTION YES NO
2 1) Check if communication is possible by
trying communication with other
controller (ECM (or PCM), ICM or ABS
controller).
2) Is it possible to communicate with other
controller?
Go to step 3. Repair open in common
section of serial data circuit
(“W/B” wire circuit) used by
all controllers or short to
ground or power circuit
which has occurred some-
where in serial data circuit
(“W/B” wire circuit).
3 1) With ignition switch OFF, disconnect
SDM and “Lamp, DLC and Monitor
Coupler Ground” (“E”) connector.
2) Check proper connection at “W/B” wire
terminal for DLC in “E” connector.
3) If OK, then check resistance between
“W/B” wire terminal in “E” connector and
“A4” terminal of SDM connector.
4) Is resistance 1 or less?
Substitute a known-good
SDM and recheck. Repair high resistance or
open in “W/B” wire circuit
(in air bag harness).
Fig. for STEP 1 Fig. for STEP 3
Special Tool
(A): 09932-76010
NOTE:
Upon completion of inspection and repair work, perform following items.
1) Reconnect all air bag system components, ensure all components are properly mounted.
2) Repeat “Air Bag Diagnostic System Check Flow Table”, referring to p.10B-11 to confirm that the trouble
has been corrected.