Sdm Cannot Communicate Through The Serial Data Circuit - Suzuki Liana RH413 Service Manual

8B-27 Air Bag System:

SDM Cannot Communicate through the Serial Data Circuit

Wiring Diagram
GRN
1
2
GRN
1. From main fuse
2. Ignition switch
3. "METER" fuse
4. "AIR BAG" warning lamp in combination meter
5. "AIR BAG" fuse
CAUTION
!
• Be sure to perform "Air Bag Diagnostic System Check" before starting diagnosis according to flow.
• When measurement of resistance or voltage is required in this flow, use a specified digital
multimeter (Refer to "Special Tool".) along with a correct terminal adapter from special tool
(Connector test adapter kit).
• When a check for proper connection is required, refer to "Inspection of Intermittents and Poor
Connections".
• If there is open circuit in the air bag wire harness, connector or terminal is found damaged, replace
the wire harness, connector and terminal as an assembly.
Flow 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" circuit.
BLK/RED
3
5
RED
WHT/RED
1
7
BLU
8
BLK/ORN
10. Ground for air bag system
"L80"
"G14"
YEL/RED
YEL/RED
11
4
10
BLK
BLK
RED
PPL
9
"L79"
BLK
11
BLU
BLU
"L83"
"G46"
12
6. SDM
7. DLC
8. To other control module
9. "AIR BAG" monitor coupler
S3RH0A8204013
"L70"
L70-30
L70-31
L70-32
L70-8
+30V+5V
L70-28
11. Ground on body
12. Ground on Engine block
6
I2RH01820020-01