2006 ACURA CSX battery

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Opening the SRS Unit Shorting Connectors
for Diagnosis
Special Tools Required
24-18SRS
Precautions and Procedures (cont’d)
B
070AZ-SAA0100
SRS UNIT
A SRS UNIT CONNECTOR A (28P)
SRS UNIT CONNECTOR B (28P)
SRS short canceller 070AZ-SAA0100
NOTE:
 To prevent damage to the c onnector cavity, insert
short canceller straight into the cavity from the
terminal side.
 Before installing a short canceller, wash it with electrical contact cleaner, then dry it with
compressed air.
 Do not use a short canceller if it is damaged.
 Make sure to remove the short canceller before reconnection.
 Some systems store data in memory that is lost when the battery is disconnected. Before disconnecting the
battery, refer to Battery Terminal Disconnection and
Reconnection (see page 22-68).
When SRS unit connectors A (28P) and B (28P) are
disconnected, a short circuit is automatically created in
the connector by its own function to pr event an airbag
deployment. The circuit may need to be open
sometimes when testing the system. Insert a short
canceller (070AZ-SAA0100) in the specified cavities
when necessary to keep the circuit open for testing. Terminal numbers are shown from the wire side of the
female terminals. Insert the short canceller(s) into the
cavities on the terminal side of connector.
Terminal side of
female terminals Wire side of female terminals
Insert short canceller(s) here.
Wire side of female terminals Insert short canceller(s) here.
08/08/21 13:54:20 61SNR030_240_0018
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Seats with Side AirbagsDisconnecting System Connectors
Driver’s Airbag
24-19
SIDE AIRBAG
LABEL
A
B
Seats with side airbags have a ‘‘SIDE AIRBAG’’ label on
the seat-back.
 Clean the seats with a damp cloth. Do not soak the seats with liquid. Do not spray steam on the seats.
 Do not repair a torn or frayed seat-back cover. Replace the seat-back cover if it is damaged.
 After a collision in where the side airbag was deployed, replace the side airbag and the seat frame
with new parts. If the seat-back cushion is split, it
must be replaced.
 Never put aftermarket accessories on the seats (covers, pads, seat heaters, lights, etc.). 1. Disconnect the negative cable from the battery,
when wait at least 3 minutes.
2. Remove the access panel (A) from the steering wheel, then disconnect the driver’s airbag 4P
connector (B) from the cable reel.
(cont’d)
08/08/21 13:54:20 61SNR030_240_0019
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DTC (Diagnostic Trouble Codes) Reading the DTC
Precautions
24-22SRS
General Troubleshooting Information
A
The self-diagnostic function of the SRS system allows it
to locate the causes of system problems and store this
information in memory. For easier troubleshooting, this
data can be retrieved via a data link circuit.
 When you turn the ignition switch to ON (II), the SRS indicator comes on. If it goes off after 6 seconds, the
system is normal, and is not currently detecting any
abnormality.
 If there is an abnormality, the system locates and defines the problem, stores this information in
memory, and turns on the SRS indicator. The data
remains in memory even if the ignition switch is
turned off or the battery is disconnected.
 The data is stored in memory as a diagnostic trouble code (DTC).
 The ‘‘x’’ at the end of each DTC denotes a numeric character (0 thru 9) or an alpha character (A thru F)
that is displayed on the HDS.
 DTCs are either latching or resetting depending on the malfunction. With resetting DTCs, the SRS
indicator goes off the next time the ignition switch is
turned to ON (II), and the system is normal, but the
DTC is still stored. With latching DTCs, the SRS
indicator does not turn to LOCK (0) until the
malfunction is repaired and the DTC is cleared.
 When you connect the HDS to the data link connector (DLC), you can retrieve a more detailed DTC in the
HDS ‘‘SRS’’ menu.
NOTE: Only read DTCs from the SRS menu, not from
the SWS menus. SWS (ODS unit) DTCs are subcodes
of SRS unit DTCs. Only troubleshoot the
corresponding SRS DTCs.
 After reading and recording the DTC, proceed with the troubleshooting procedure for that code.
 Use only a digital multimeter to check the system. Make sure its output is 10 mA (0.01 A) or less when
switched to the smallest value in the ohmmeter range.
A tester with a higher output could damage the
airbag circuit or cause accidental airbag deployment
and possible injury.  Whenever the ignition switch is in ON (II), or has been
turned to LOCK (0), for less than 3 minutes, be careful
not to bump the SRS unit; the airbags could
accidentally deploy and cause damage or injuries.
 Before removing the dashboard wire harness, floor wire harness, disconnect the driver’s airbag
connector, the front passenger’s airbag connector,
both side airbag connectors, both side curtain airbag
connectors and both seat belt tensioner connectors.
 Make sure the battery is fully charged. If the battery is dead or low, electrical measurements may not be
correct.
 Do not touch a tester probe to the terminals in the SRS unit or harness connectors, and do not connect
the SRS unit terminals or the sensor terminals with a
jumper wire. Use only the backprobe set and the
multimeter. Backprobe spring-loaded lock type
connectors correctly.
1. Make sure the ignition switch is in LOCK (0).
2. Connect the HDS to the data link connector (DLC) (A).
3. Turn the ignition switch to ON (II).
4. Make sure the HDS communicates with the vehicle and the SRS unit. If it does not communicate,
troubleshoot the DLC circuit (see page 11-204).
08/08/21 13:54:21 61SNR030_240_0022
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Clear the DTC Memory With the HDS
24-23
A
5. Use the HDS to check for DTCs.NOTE: Only read DTCs from the SRS menu, not
from the SWS menus. SWS (ODS unit) DTCs are
subcodes of SRS unit DTCs. Only troubleshoot the
corresponding SRS DTCs.
6. Read and record the DTC.
7. Turn the ignition switch to LOCK (0), and wait for 10 seconds.
8. Disconnect the HDS from the DLC.
9. Do the troubleshooting procedure for the DTC. NOTE: Make sure the battery is fully charged before
you begin.
1. Make sure the ignition switch is in LOCK (0).
2. Connect the HDS to the data link connector (DLC) (A).
3. Turn the ignition switch to ON (II).
4. Make sure the HDS communicates with the vehicle and the SRS unit. If it does not communicate,
troubleshoot the DLC circuit (see page 11-204).
5. In the SRS MENU of the HDS, select SRS, then DTC to clear DTCs.
6. Turn the ignition switch to LOCK (0), and wait for 10 seconds.
7. Disconnect the HDS from the DLC.
(cont’d)
08/08/21 13:54:22 61SNR030_240_0023
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Clear the DTC Memory Using MES
Connector Without the HDSTroubleshooting Intermittent Failures
Special Tools Required
24-24SRS
General Troubleshooting Information (cont’d)
B
A
07PAZ-001010A
SCS Service Connector 07PAZ-001010A
NOTE: Make sure the battery is fully charged before
you begin.
To clear the DTCs from the SRS unit, use the HDS or the
following procedure. 1. Make sure the ignition switch is in LOCK (0).
2. Connect the SCS service connector (A) to the yellow MES 2P connector (B). Do not use a jumper
wire.
3. Turn the ignition switch to ON (II).
4. The SRS indicator will come on for about 6 seconds, and then go off. Remove the SCS service connector
from the MES connector (2P) within 4 seconds after
the indicator goes off.
5. The SRS indicator will come on again. Reconnect the SCS service connector to the MES connector
(2P) within 4 seconds after the indicator comes on.
6. When the SRS indicator goes off, remove the SCS service connector from the MES connector (2P)
within 4 seconds.
7. The SRS indicator blinks two times, indicating that the memory has been cleared.
8. Turn the ignition switch to LOCK (0).
9. Turn the ignition switch to ON (II) again. If the SRS indicator comes on for 6 seconds, and then goes off,
the system is OK. If the indicator stays on,
troubleshoot the DTC, refer to symptom
troubleshooting. If there was a malfunction, but it does not recur, it will
be stored in the memory as an intermittent failure, and
the SRS indicator may come on depending on this
malfunction detected.
NOTE:
 Check the condition of the battery (see page 22-67) and the charging system (see page 4-23). Low battery
voltage may cause some intermittent failures.
 A faulty or damaged cable reel can cause intermittent problems related to the driver’s airbag inflator DTCs.
After checking the DTC, troubleshoot as follows: 1. Make sure the ignition switch is in LOCK (0).
2. Connect the HDS to the data link connector (DLC).
3. Turn the ignition switch to ON (II).
4. Make sure the HDS communicates with the vehicle and the SRS unit. If it does not communicate,
troubleshoot the DLC circuit (see page 11-204).
5. In the SRS MENU on the HDS, select SRS, then DTC to clear DTCs.
6. Read the DTC (see ‘‘Reading the DTC’’).
7. Clear the DTC memory(see ‘‘Clear the DTC’’).
8. Set the parking brake, then start the engine, and let it idle.
9. The SRS indicator comes on for about 6 seconds and then goes off.
08/08/21 13:54:22 61SNR030_240_0024
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Rear Safing Sensor
For the SRS to operate:
Seat Belt Tensioners and Seat Belt Buckle Tensioners
Driver’s and Front Passenger’s Airbag(s)
Side Airbag(s)
Side Curtain Airbag(s)
Side Airbag Cutoff Indicator/OPDS Operation
Passenger Airbag Cutoff Indicator
SRS Operation
24-36SRS
System Description (cont’d)
The rear safing sensor is located under the rear seat. The rear safing sensor performs the same basic function as the
safing sensor in the SRS unit. It measures sideways G force, such as the force the vehicle would receive in a side
collision in the rear, and sends that information to the SRS unit. The SRS unit uses that information, and the
information from the second side impact sensors to determine the side that is impacted and the force. If the threshold
is met, the SRS unit deploys the side airbag, the side curtain airbag, and the seat belt tensioner on that side.
The indicator comes on when the front passenger’s seat is occupied by a small adult or child who is leaning into the
deployment path, or when an object (grocery bag, briefcase, purse, etc.) is in the seat. This indicates the passenger’s
side airbag is off and will not deploy; there is no problem with the side airbag. If the passenger sits upright or moves
to another seat, or you remove the object from the seat, the light should go off. There will be some delay between the
occupant’s repositioning and when the indicator will turn on or off.
The indicator comes on if the weight on the front passenger’s seat is about 30 kg (65 lbs) or less. This indicates the
passenger’s front airbag is off and will not deploy. The front airbag is shut off to reduce the chance of airbag-caused
injuries.
The main circuit in the SRS unit senses and analyzes the force of impact and, if necessary, ignites the inflator charges.
If battery voltage is too low or power is disconnected due to the impact, the voltage regulator and the back-up power
circuit will keep voltage at a constant level.
(1) A front impact sensor, side impact sensor, or the rear safing sensor must activate and send electric signals to the
microprocessor.
(2) The microprocessor must compute the signals and trigger the tensioners.
(3) The charges must ignite and deploy the tensioners.
(1) A front impact sensor must activate and send electric signals to the microprocessor.
(2) The microprocessor must compute the signals and trigger the airbag inflator(s).
(3) The triggered inflators must ignite and deploy the airbags.
(1) A side impact sensor must activate and send electric signals to the microprocessor.
(2) The microprocessor must compute the signals and trigger the side airbag inflator(s). However, the microprocessor
does not trigger the front passenger’s side airbag if the SRS unit determines that the front passenger’s head is in the
deployment path of the side airbag.
(3) The inflator that receives the signal must ignite and deploy the side airbags.
(1) A side impact sensor or the rear safing sensor must activate, and send electrical signals to the microprocessor.
(2) The microprocessor must compute the signals and trigger the side curtain airbag and side airbag inflator(s).
(3) The triggered inflators must ignite and deploy the side curtain airbag and side airbag at the same time.
08/08/21 13:55:33 61SNR030_240_0036
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µ
´
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).
(cont’d)
08/08/21 13:55:34 61SNR030_240_0037
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Î(#') ’06 model
24-40SRS
Circuit Diagram
GRN
BLU YEL
214 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
MICURED
2
4 MICU
GRY
YEL YEL
3
1
17 Vs
Vo
Vs
Vo
Vs
Vo
Vs
Vo BLU
BRN
5
10 15
GRY
123 3 21
LT GRN
16
11 6
GRY
BLU
GRN RED
4
914
WHT
123
321
BLK
13
83
RED
BRN MAIN CIRCUIT
VB
VA
WHT
GAUGE CONTROL MODULE (TACH)
BLK
412 SRS UNIT
ODS UNIT
7112 No. 9
(7.5 A) (7.5 A)
No. 10
No. 11
(10 A)
8
9 41
BRN
BLK
YEL
BLU GRN J
BATTERY
BAT
IG1
IGNITION SWITCH
UNDER-DASH FUSE/RELAY BOX
BLK
GRN
WHT BRN
A17
DRIVE CIRCUIT DRIVE CIRCUIT F-CAN TRANSCEIVER
16 1 19 WHT RED
A
A6
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
INDICATORJUNCTION
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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