8B-27 Air Bag System:
SDM Cannot Communicate through the Serial Data Circuit
S3RH0A8204013
Wiring Diagram
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
• 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.
1
2
3
4
GRN
GRN
BLK/RED
YEL/RED
YEL/RED
RED
RED
BLU
BLU
5
8
9
PPL
“L79”
“L83”
“G46”
“L70”
L70-32
L70-28
L70-8
6
“G14”
“L80”
10
+30V +5V
L70-30
BLK
BLK
L70-31
11
1
BLK
BLK/ORN
WHT/RED
BLU
7
11
12
I2RH01820020-01
1. From main fuse
6. SDM
11. Ground on body
2. Ignition switch
7. DLC
12. Ground on Engine block
3. “METER” fuse
8. To other control module
4. “AIR BAG” warning lamp in combination meter
9. “AIR BAG” monitor coupler
5. “AIR BAG” fuse
10. Ground for air bag system
Содержание Liana RH413
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