Acura CSX. Manual — part 680
02
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Self-diagnostic System
24-37
GAUGE CONTROL MODULE
CAN
CAN
MICROPROCESSOR and DIAGNOSTIC CIRCUIT
SRS UNIT
IMPACT
GND
TRIGGER CIRCUIT
SCS
MES
DLC
VA
VB
ODS UNIT
FRONT
PASSENGER’S SEAT
OPDS
SENSOR
RIGHT
SIDE IMPACT
SENSOR
(SECOND)
REAR
SAFING
SENSOR
FRONT
PASSENGER’S
SEAT BELT
BUCKLE
TENSIONER
CABLE
REEL
DRIVER’S
AIRBAG
FIRST
INFLATOR
DRIVER’S
AIRBAG
SECOND
INFLATOR
FRONT
PASSENGER’S
AIRBAG
SECOND
INFLATOR
FRONT
PASSENGER’S
AIRBAG
FIRST
INFLATOR
SRS
INDICATOR
SIDE AIRBAG
CUTOFF
INDICATOR
DRIVER’S
SEAT BELT
BUCKLE
TENSIONER
FRONT
PASSENGER’S
SEAT BELT
TENSIONER
DRIVER’S
SEAT BELT
TENSIONER
RIGHT SIDE
CURTAIN
AIRBAG
INFLATOR
LEFT SIDE
CURTAIN
AIRBAG
INFLATOR
DATA
LINK
CIRCUIT
MEMORY
CIRCUIT
SIDE
IMPACT
SENSOR
FRONT
IMPACT
SENSOR
POWER
SUPPLY
CIRCUIT
LEFT
FRONT
IMPACT
SENSOR
RIGHT
FRONT
IMPACT
SENSOR
LEFT
SIDE IMPACT
SENSOR
(FIRST)
RIGHT
SIDE IMPACT
SENSOR
(FIRST)
DRIVER’S
SIDE AIRBAG
INFLATOR
FRONT
PASSENGER’S
SIDE AIRBAG
INFLATOR
UNDER-DASH
FUSE/RELAY
BOX
LEFT
SIDE IMPACT
SENSOR
(SECOND)
FRONT
PASSENGER’S
WEIGHT
SENSORS
FRONT
PASSENGER’S
AIRBAG
CUTOFF
INDICATOR
DRIVER’S SEAT
POSITION
SENSOR
A self-diagnostic circuit is built into the SRS unit; when the ignition switch is turned to ON (II), the SRS indicator comes
on and goes off after about 6 seconds if the system is operating normally.
If the indicator does not come on, or does not go off after 6 seconds, or comes on while driving, it indicates an
abnormality in the system. The system must be inspected and repaired as soon as possible.
For better serviceability, the SRS unit memory stores a DTCs related to the cause of the malfunction, and the unit is
connected to the data link connector (DLC). This information can be read with the HDS when it is connected to the DLC
(see page 24-22).
NOTE: Before you disconnect the negative cable from battery for troubleshooting, review Battery Terminal
Disconnection and Reconnection (see page 22-68).
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03
SRS Unit Inputs and Outputs at Connector A (28P)
Terminal
Number
Wire Color
Terminal Name
Description
24-38
SRS
1
GRN
LA2
Power source for the driver’s airbag second inflator
2
PUR
LA2
Ground for the driver’s airbag second inflator
3
LT GRN
RA2
Power source for the front passenger’s airbag second inflator
4
LT BLU
RA2
Ground for the front passenger’s airbag second inflator
5
LT GRN
MES
Memory clear signal input
6
ORN
SCS
Service check signal input
7
LT BLU
LA1
Power source for the driver’s airbag first inflator
8
BRN
LA1
Ground for the driver’s airbag first inflator
9
YEL
RA1
Power source for the front passenger’s airbag first inflator
10
BLU
RA1
Ground for the front passenger’s airbag first inflator
11
WHT
CAN HI
Sends and receives communication signal with gauge control
module
12
RED
CAN LO
Sends and receives communication signal with gauge control
module
13
BLU
PTT
Passenger’s airbag cutoff indicator output line
14
GRN
ODS
Sends and receives communication signal with the ODS unit
15
BRN
LFS
Ground for the left front impact sensor
16
LT BLU
RFS
Ground for the right front impact sensor
17
YEL
VA
SRS system sub power (common with ODS)
18
RED
VB
SRS dedicated power (dedicated booster circuit)
22
BLK
SRS GND (1)
Ground circuit for the SRS (G506)
23
BLK
SRS GND (2)
Ground circuit for the SRS (G506)
24
LT BLU
K-LINE
Sends and receives scan tool signal (serial data)
27
RED
LFS
Power source for the left front impact sensor
28
GRN
RFS
Power source for the right front impact sensor
NOTE: BLU or BRN wires may be substituted for the wire colors in this table.
Wire side of female terminals
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04
SRS Unit Inputs and Outputs at Connector B (28P)
Terminal
Number
Wire Color
Terminal Name
Description
24-39
1
RED
LRP
Power source for the driver’s seat belt tensioner
2
BRN
LRP
Ground for the driver’s seat belt tensioner
3
GRN
RRP
Power source for the front passenger’s seat belt tensioner
4
LT BLU
RRP
Ground for the front passenger’s seat belt tensioner
5
GRY
SS
Ground for the driver’s seat position sensor
6
LT GRN
SS
Power source for the driver’s seat position sensor
7
ORN
LBP
Power source for the driver’s buckle tensioner
8
GRN
LBP
Ground for the driver’s buckle tensioner
9
YEL
RBP
Power source for the front passenger’s buckle tensioner
10
WHT
RBP
Ground for the front passenger’s buckle tensioner
11
YEL
LBSC
Driver’s seat belt buckle switch un-buckled signal
12
LT GRN
LBSO
Driver’s seat belt buckle switch buckled signal
15
BLU
RBSC
Front passenger’s seat belt buckle switch un-buckled signal
16
ORN
RBSO
Front passenger’s seat belt buckle switch buckled signal
17
GRN
LSA
Power source for the driver’s side airbag inflator
18
RED
LSA
Ground for the driver’s side airbag inflator
19
WHT
RSA
Power source for the front passenger’s side airbag inflator
20
BLU
RSA
Ground for the front passenger’s side airbag inflator
21
BRN
LCA1
Power source for the left side curtain airbag inflator
22
BLU
LCA1
Ground for the left side curtain airbag inflator
23
GRY
RCA1
Power source for the right side curtain airbag inflator
24
RED
RCA1
Ground for the right side curtain airbag inflator
25
PNK
LBS1
Power source for the left side impact sensor (first), left side
impact sensor (second), and rear safing sensor
26
BLU
LBS1
Ground for the left side impact sensor (first), left side impact
sensor (second), and rear safing sensor
27
BRN
RBS1
Power source for the right side impact sensor (first), right side
impact sensor (second)
28
YEL
RBS1
Ground for the right side impact sensor (first), right side impact
sensor (second)
NOTE: BLU or BRN wires may be substituted for the wire colors in this table.
Wire side of female terminals
08/08/21 13:55:34 61SNR030_240_0039
*90
SNR9A0AH46400000000EAAT00
’06 model
24-40
SRS
Circuit Diagram
GRN
BLU
YEL
2
1
4
Q
E
G504
G602
BLK
LT GRN*
BLK*
BLK*
ORN*
LT BLU*
WHT*
RED*
BLU*
RED*
YEL*
2
1
G506
5
22
23
13
BLU
MICU
RED
2
4
MICU
GRY
YEL
YEL
3
1
17
Vs
Vo
Vs
Vo
Vs
Vo
Vs
Vo
BLU
BRN
5
10
15
GRY
1
2
3
3
2
1
LT GRN
16
11
6
GRY
BLU
GRN
RED
4
9
14
WHT
1
2
3
3
2
1
BLK
13
8
3
RED
BRN
MAIN CIRCUIT
VB
VA
WHT
GAUGE CONTROL MODULE (TACH)
BLK
4
1
2
SRS UNIT
ODS UNIT
7
1
12
No. 9
(7.5 A)
(7.5 A)
No. 10
No. 11
(10 A)
8
9
4
1
BRN
BLK
YEL
BLU
GRN
J
BATTERY
BAT
IG1
IGNITION SWITCH
UNDER-DASH FUSE/RELAY BOX
BLK
GRN WHT
BRN
A
17
DRIVE CIRCUIT
DRIVE CIRCUIT
F-CAN TRANSCEIVER
16
1
19
WHT
RED
A
A
6
24
ORN
LT BLU
A
11
12
17
18
UNDER-HOOD
FUSE/RELAY BOX
DATA LINK
CONNECTOR
(DLC)
JUNCTION
CONNECTOR
JUNCTION
CONNECTOR
SEAT BELT
REMINDER
INDICATOR
SIDE
AIRBAG
CUTOFF
INDICATOR
SRS
INDICATOR
JUNCTION
CONNECTOR
To
SRS
UNIT
ODS
UNIT
HARNESS
OPDS
SENSOR
JUNCTION
CONNECTOR
DASHBOARD
WIRE
HARNESS
FRONT
PASSENGER’S
WEIGHT
SENSOR
(FRONT
INNER
SIDE)
FRONT
PASSENGER’S
WEIGHT
SENSOR
(REAR
INNER
SIDE)
FRONT
PASSENGER’S
WEIGHT
SENSOR
(FRONT
OUTER
SIDE)
FRONT
PASSENGER’S
WEIGHT
SENSOR
(REAR
OUTER
SIDE)
DASHBOARD
WIRE
HARNESS
FLOOR
WIRE
HARNESS
DASHBOARD
WIRE
HARNESS
PASSENGER’S
AIRBAG CUTOFF
INDICATOR
JUNCTION
CONNECTOR
MEMORY
ERASE
SIGNAL
(MES)
CONNECTOR
(2P)
FRONT
PASSENGER’S
SEAT
WIRE
HARNESS
(With
seat heater)
C783
C782
18P
CAN
HI
CAN
LO
K-LINE
SCS
MES
SRS
GND (2)
SRS
GND (1)
a
08/08/21 13:55:35 61SNR030_240_0040
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