airbag off ACURA CSX 2006 Service User Guide

Î
22-252Gauges
Circuit Diagram - Gauge Control Module (Tach) (cont’d)
RED




GAUGE CONTROL MODULE (TACH)
MIAN CIRCUIT INDICATOR DRIVE CIRCUIT
16
G504
15
14
13
91011
C
B
A
G503INDICATOR DRIVE CIRCUIT
BLK
BLK
RED
YEL LT GRN ORN
LIGHTS-ON/FOG LIGHT
INDICATOR
DIMMING CIRCUIT
CRUISE CONTROL
SET/RESUME/CANCEL
SWITCH CRUISE
CONTROL
INDICATOR
(LED)
DASH LIGHTS
BRIGHTNESS
CONTROLLER
COMPULSORY
TURNING-ON
CIRCUIT
CRUISE CONTROL
DIMMING CIRCUIT
LIGHTS-ON/FOG LIGHT
INDICATOR
CRUISE
CONTROL
MAIN
SWITCH FAIL-SAFE
CIRCUIT
MALFUNCTION
INDICATOR
LAMP (MIL)
(LED)
CRUISE
MAIN
INDICATOR
(LED)
AMBIENT LIGHT
SEAT HEATER SWITCHES LIGHT
DRIVER’S FOOTWELL LIGHT
FRONT PASSENGER’S
FOOTWELL LIGHT NAVIGATION UNIT
HAZARD WARNING SWITCH LIGHT
MOONROOF SWITCH LIGHT
STEERING SWITCHES LIGHT
CLIMATE CONTROL UNIT
DASH LIGHTS BRIGHTNESS
CONTROLLER
FRONT PASSENGER’S
AIRBAG CUTOFF INDICATOR
VSA OFF SWITCH








B
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µ
´
µ
22-256 Gauges
Circuit Diagram - Dash Lights Brightness Controller
RED
GRY
BRN45
YEL 6
BLU 7
PUR
BLK
2176
4
G501 13
RED
14
16
BLK BLK
G503
13
RED
16
BLK BLK
G504 15
MAIN CIRCUIT
WHT BRN
No. 2 (IG) (50 A)
GAUGE CONTROL MODULE (TACH) 18 17
ORN
IG1
BAT
BLU
WHT
No. 23 (10 A)
BATTERY
IGNITION SWITCH
No. 1 (BAT) (100 A)
(7.5 A) No. 10
UNDER-DASH
FUSE/RELAY
BOX IG1 HOT in ON (II)
and START (III)
DASH LIGHTS BRIGHTNESS CONTROLLER and
ODOMETER SELECT/RESET SWITCH
No. 14 (7.5 A) FUSE
(UNDER-DASH
FUSE/RELAY BOX)
GAUGE CONTROL
MODULE (TACH) km/h
mph
SEL/
RESET
ILLUMI
()
ILLUMI
()
H1
D4 G2D2
UNDER-HOOD FUSE/RELAY BOX
5
3LIGHTS
(LED) Q1 Q9
MICU A/T GEAR POSITION INDICATOR
PANEL LIGHT
AMBIENT LIGHT
SEAT HEATER SWITCHES LIGHT
DRIVER’S FOOTWELL LIGHT*1
FRONT PASSENGER’S
FOOTWELL LIGHT*1
CLIMATE CONTROL UNIT*2
DASH LIGHTS BRIGHTNESS
CONTROLLER*2
FRONT PASSENGER’S
AIRBAG CUTOFF INDICATOR*2
VSA OFF SWITCH*2









AUDIO UNIT
NAVIGATION UNIT
HAZARD WARNING SWITCH LIGHT
MOONROOF SWITCH LIGHT
STEERING SWITCHES LIGHT
CLIMATE CONTROL UNIT*1
DASH LIGHTS BRIGHTNESS
CONTROLLER*1
FRONT PASSENGER’S
AIRBAG CUTOFF INDICATOR*1
VSA OFF SWITCH*1









*1: TYPE S model
*2: Except TYPE S model
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Restraints
Restraints
Seat Belts
SRS (Supplemental Restraint System)
................................................................ ................................................................
Special Tools . 24-2
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.......................................
.....................................................................
Component Location Index . 24-3
Front Seat Belt Replacement . 24-4
Rear Seat Belt Replacement . 24-7
Inspection . 24-9
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Component Location Index . 24-11
Precautions and Procedures . 24-13
General Troubleshooting Information . 24-22
ODS Unit Initialization . 24-26
ODS Unit Calibration . 24-27
ODS Unit Operation Check . 24-28
Driver’s Seat Position Sensor Operation Check . 24-29
DTC Troubleshooting Index . 24-30
Symptom Troubleshooting Index . 24-34
System Description . 24-35
Circuit Diagram . 24-40
DTC Troubleshooting . 24-48
Symptom Troubleshooting . 24-181
Component Replacement/Inspection After
Deployment . 24-185
Driver’s Airbag Replacement . 24-188
Front Passenger’s Airbag Replacement . 24-189
Side Airbag Replacement . 24-191
Side Curtain Airbag Replacement . 24-192
Airbag and Tensioner Disposal . 24-196
Cable Reel Replacement . 24-200
SRS Unit Replacement . 24-203
Side Impact Sensor (First) Replacement . 24-204
Side Impact Sensor (Second) Replacement . 24-205
Rear Safing Sensor Replacement . 24-206
Front Passenger’s Weight Sensor Replacement . 24-207
ODS Unit Replacement . 24-209
Front Impact Sensor Replacement . 24-210
Driver’s Seat Position Sensor Replacement . 24-211
Passenger’s Airbag Cutoff Indicator Illumination Bulb Test/Replacement . 24-212
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24-11
SRS
Component Location Index
SRS INDICATOR
SIDE AIRBAG
CUTOFF INDICATOR
CABLE REEL
DRIVER’S AIRBAG
FRONT PASSENGER’S AIRBAG
PASSENGER’S AIRBAG CUTOFF INDICATOR
SRS UNIT OPDS SENSOR/SEAT-BACK
FRONT PASSENGER’S
SIDE AIRBAG
FRONT PASSENGER’S
SEAT BELT TENSIONER RIGHT SIDE
IMPACT SENSOR
(FIRST)
ODS UNIT
FRONT PASSENGER’S WEIGHT SENSORS
DRIVER’S SEAT BELT TENSIONER
LEFT SIDE IMPACT SENSOR (FIRST)
DRIVER’S SEAT POSITION SENSOR
DRIVER’S SIDE AIRBAG
DATA LINK
CONNECTOR (DLC) MEMORY ERASE
SIGNAL (MES)
CONNECTOR (2P)
(YELLOW)
FRONT PASSENGER’S SEAT BELT
BUCKLE TENSIONER
DRIVER’S SEAT BELT BUCKLE TENSIONER
(cont’d)
Troubleshooting, page 24-181
Troubleshooting, page 24-183
Replacement, page 24-200
Replacement, page 24-188
Disposal, page 24-196
Replacement, page 24-189
Disposal, page 24-196
Troubleshooting, page 24-184
Bulb Test/Replacement, page 24-212
Replacement, page 24-203 Replacement, page 20-122
Replacement,page 24-191
Disposal, page 24-196
Replacement, page 24-4
Disposal,
page 24-196 Replacement,
page 24-204
Initialization, page 24-26
Calibration, page 24-27
Operation Check, page 24-28
Replacement, page 24-209
Replacement, page 24-207
Replacement, page 24-4
Disposal, page 24-196
Replacement, page 24-204
Operation Check, page 24-29
Replacement, page 24-211
Replacement, page 24-188
Disposal, page 24-196Replacement, page 24-6
Replacement, page 24-6
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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).
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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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SRS Unit DTCDetection Item Notes
24-32SRS
DTC Troubleshooting Index (cont’d)
82-14
No signal from the front passenger’s weight sensor (front inner side) (see page 24-151)
82-15 Internal failure of the front passenger’s weight sensor (front inner side) (see page 24-155)
82-16 No signal from the front passenger’s weight sensor (rear inner side) (see page 24-156)
82-17 Internal failure of the front passenger’s weight sensor (rear inner side) (see page 24-155)
83-24 No signal from the front passenger’s weight sensor (front outer side) (see page 24-159)
82-25 Internal failure of the front passenger’s weight sensor (front outer side) (see page 24-155)
83-26 No signal from the front passenger’s weight sensor (rear outer side) (see page 24-163)
82-27 Internal failure of the front passenger’s weight sensor (rear outer side) (see page 24-155)
85-4x Internal failure of the ODS unit (see page 24-166)
85-5x
85-61 No signal from the ODS unit (see page 24-147)
85-62 Non-stipulated data from the ODS unit
85-63 Internal failure of the ODS unit (see page 24-166)
85-64
85-71 ODS unit not initialize (see page 24-167)
85-78
85-79 OPDS sensor initial check failure
86-1x Faulty OPDS seat-back sensor (see page 24-168)
86-2x Faulty OPDS seat support sensor
92-1x Open in the passenger’s airbag cutoff indicator (see page 24-169)
92-2x Open or short to ground in the passenger’s airbag cutoff indicator (see page 24-170)
A1-1x Faulty power supply (VA line) (see page 24-171)
A2-1x Faulty power supply (VB line) (see page 24-173)
B2-1x No signal from the rear safing sensor (see page 24-174)
B2-17 Internal failure of the rear safing sensor (see page 24-177)
B2-8x
B2-9x
B2-Ax B2-Bx Ex-11 Control operation recorded (see page 24-138)
Fx-11 Airbags and/or tensioners deployment recorded (see page 24-139)
NOTE: The ‘‘x’’ at the end of each DTC denotes a numeric character (0 thru 9) or an alpha character (A thru F) that you will see on the HDS display. The character is unrelated to your troubleshooting; it designates the SRS unit manufacturer and other detail used for product
analysis.
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Symptom Diagnostic procedure Also check for
24-34
SRS
Symptom Troubleshooting Index








SRS indicator does not come on Symptom Troubleshooting (see page 24-
181) Communication with the
HDS
SRS indicator stays on, but no DTCs
are stored Symptom Troubleshooting (see page 24-
182) Charging system for
under or overcharging
Communication with the
HDS
Side airbag cutoff indicator flashes Check the DTC. If a DTC indicated, go to the DTC troubleshooting ODS Initialization
Communication with the
HDS
Side airbag cutoff indicator stays on Symptom Troubleshooting (see page 24- 183) Communication with the
HDS
Side airbag cutoff indicator does not
come on Symptom Troubleshooting (see page 24-
183) Initialize the ODS unit
Communication with the
HDS
Passenger’s airbag cutoff indicator
flashes Check the DTC. If a DTC indicated, go to the
DTC troubleshooting Calibration the ODS unit
Communication with the
HDS
Passenger’s airbag cutoff indicator
stays on or comes on suddenly Symptom Troubleshooting (see page 24-
184) Communication with the
HDS
Passenger’s airbag cutoff indicator
does not come on Check the DTC. If a DTC indicated, go to the
DTC troubleshooting Communication with the
HDS
HDS does not communicate with the
SRS unit or the vehicle Troubleshoot the DLC circuit (see page
11-204). Communication with the
HDS
08/08/21 13:55:32 61SNR030_240_0034
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SRS Components
Airbags
Front Passenger’s Weight Sensors
Driver’s Seat Position Sensor
24-35
System Description
AB
C
D
EF
M
E
I G J
F
L
L
G
H
O N
The SRS is a safety device which, when used with the seat belt, is designed to help protect the driver and front
passenger in a frontal impact exceeding a certain set limit. The system consists of the SRS unit, including safing
sensor and impact sensor (A), the cable reel (B), the driver’s airbag (C), the front passenger’s airbag (D), side airbags
(E), side curtain airbags (F), seat belt tensioners (G), seat belt buckle tensioners (H), side impact sensors (first) (I), front
impact sensors (J), rear safing sensor (K) and side impact sensors (second) (L).
Since the driver’s and front passenger’s airbags use the same sensors, both normally inflate at the same time.
However, it is possible for only one airbag to inflate. This can occur when collision severity is near the threshold for
airbag deployment. In such cases, the SRS system will only deploy airbags when the protection provided by the seat
belt is insufficient.
The front passenger’s weight sensors (M) are part of seat base. The front passenger’s weight sensors detect the
weight on the seat, and send the information to the ODS unit (N). If the total weight is about 30 kg (65 lbs) or less, the
ODS unit sends a signal to the SRS unit to prevent the passenger’s airbag from deploying. When the passenger’s
airbag is disabled, the passenger airbag cutoff indicator on the center panel comes on to alert the driver that the front
passenger’s airbag will not deploy in a front-end collision.
The driver’s seat position sensor (O) is under the driver’s seat on the left side. When the driver’s seat is moved to its
full forward position, the deployment of the driver’s airbag is moderated to decrease its force of impact during a front-
end collision.
(cont’d)
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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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