Suzuki WagonR+ RB310 Service Manual page 1510

SDM Cannot Communicate through the Serial Data Circuit
WIRING DIAGRAM
1
2
8
1. From main fuse
2. Ignition switch
3. "METER" fuse
4. "AIR BAG" warning lamp in combination meter
CAUTION:
• Be sure to perform AIR BAG DIAGNOSTIC SYSTEM CHECK before starting diagnosis according to
flow table.
• When measurement of resistance or voltage is required in this table, use a specified digital multim-
eter (refer to SPECIAL TOOL in this section.) along with a correct terminal adapter from special tool
(Connector test adapter kit).
• When a check for proper connection is required, refer to INTERMITTENTS AND POOR CONNEC-
TIONS in this section.
• If there is open circuit in the air bag wire harness (in instrument panel harness), connector or termi-
nal is found damaged, replace the wire harness, connector and terminal as an assembly.
TABLE TEST DESCRIPTION
STEP 1 : An improper connection to the data link connector (DLC) will prevent communications from being
established.
STEP 2 : This test checks whether it is possible to communicate with other control module.
STEP 3 : This test checks for an open in serial data power circuit.
STEP 4 : This test checks for an open in serial data ground circuit.
STEP 5 : This test checks for an open in A/B serial data circuit.
DIAGNOSTIC FLOW TABLE
Step
1 1) Make sure that SUZUKI scan tool is free from malfunc-
tion and set correctly for air bag system is used.
2) Ignition switch OFF.
3) Check proper connection of SUZUKI scan tool to DLC.
Is scan tool connector connected to DLC securely?
3
"G25"
GRN
BLK/RED
5
GRN
1
WHT/BLU
7
WHT/RED
BLK
BRN
10
11
5. "AIR BAG" fuse
6. SDM
7. DLC ("G09")
8. To ECM, and ABS control module (if equipped)
Action
"G66"
"G25"
BLU
G66-30
BLK
9
G66-31
4
BLU/RED
G66-32
WHT/RED
G66-28
Yes
Go to step 2. Properly connect SUZUKI
AIR BAG SYSTEM 10B-19
6
+30V+5V
9. Ground for air bag system
10. Ground on body
11. Ground on Engine block
No
scan tool to DLC.