service indicator ACURA CSX 2006 Service Owner's Manual

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System Outline
19-108VSA System Components
System Description (cont’d)
CONTROL UNIT
MODULATOR UNIT VSA MODULATOR-
CONTROL UNIT
Brake pressure
signal
 Solenoid control
 Motor control
Communication via F-CAN
VSA
OFF
SWITCH
PARKING
BRAKE
SWITCH BRAKE
FLUID
LEVEL
SWITCH
WHEEL SPEED SENSOR
 Engine torque control request
 Control mode signal
 VSA control enable/disable
 Throttle open angle signal
 Engine revolution signal
 Brake pedal
position switch signal
 Service check signal
 Gear position signal
Wheel rotation
pulse signal
ECM/PCM
BRAKE
PEDAL
POSITION
SWITCH
GAUGE CONTROL MODULE (TACH)
YAW RATE-LATERAL
ACCELERATION
SENSORSTEERING ANGLE
SENSOR
VSAOFFswitchsignal
 Parking brake switch signal
 Brake fluid level switch signal
 Yaw rate signal
 Lateral acceleration signal Steering angle signal
 Indicator drive signal
 Buzzer request signal*
*: ’09 model
This system is composed of the VSA modulator-control unit, the wheel speed sensors, the steering angle sensor, the
yaw rate-lateral acceleration sensor, and the system indicators in the gauge control module (tach). The VSA
modulator-control unit controls the ABS, EBD, TCS, VSA, and brake assist with the brake pressure of each wheel and
reduces engine torque.
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22-245
C
(LED)
LCD DISPLAY
LCD DRIVERMAIN CIRCUIT
33
ORN
ORN 32
LT GRN
3 1
PUR (LED)
(LED)
(LED)
C
LCD DISPLAY
B
A
GAUGE CONTROL MODULE (TACH)
ODO,
TRIP A/TRIP B
OUTSIDE AIR
TEMPERATURE
CHECK FUEL CAP
SERVICE OIL LIFE ILLUMINATION CONTROL &
DIMMING CIRCUIT
FOR POINTER
ILLUMINATION CONTROL &
DIMMING CIRCUIT
FOR DIALILLUMINATION CONTROL &
DIMMING CIRCUIT
FOR LCD
FUEL
GAUGE
SENDING
UNIT FUEL
TANK
UNIT ILLUMINATION CONTROL &
DIMMING CIRCUIT
FOR SHIFT INDICATOR
SHIFT
INDICATOR
(A/T)
MAIN CIRCUIT
A :CANline
: Other communication line



 *1: ’06 07 models
*2: ’08 09 models
*3: ’09 model with navigation system
(cont’d)
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22-251
:CANline
MAIN CIRCUIT 33
ORN
ORN 32
LT GRN
3 1
PUR (LED)
(LED)
(LED)
C
LCD DISPLAY
B
A
GAUGE CONTROL MODULE (TACH)
ILLUMINATION CONTROL &
DIMMING CIRCUIT
FOR POINTER ILLUMINATION CONTROL &
DIMMING CIRCUIT
FOR LCDILLUMINATION CONTROL &
DIMMING CIRCUIT
FOR DIAL
FUEL
GAUGE
SENDING
UNIT FUEL
TANK
UNIT : Other communication line
DRIVE
CIRCUIT
A
ODO,
TRIP A/TRIP B
OUTSIDE AIR
TEMPERATURE
CHECK FUEL CAP
SERVICE OIL LIFE




LCD DRIVER SIDE
AIRBAG
CUTOFF
INDICATOR
(LED)*1: ’08 09 models
*2: ’09 model
(cont’d)
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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.
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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).
(cont’d)
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SRS Unit Inputs and Outputs at Connector A (28P)
Terminal
Number Wire Color Terminal Name Description
24-38SRS
System Description (cont’d)
1 GRN
LA2Power source for the driver’s airbag second inflator
2 PUR LA2Ground for the driver’s airbag second inflator
3 LT GRN RA2Power source for the front passenger’s airbag second inflator
4 LT BLU RA2Ground for the front passenger’s airbag second inflator
5 LT GRN MES Memory clear signal input
6 ORN SCSService check signal input
7 LT BLU LA1Power source for the driver’s airbag first inflator
8 BRN LA1Ground for the driver’s airbag first inflator
9 YEL RA1Power source for the front passenger’s airbag first inflator
10 BLU RA1Ground 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 PTTPassenger’s airbag cutoff indicator output line
14 GRN ODS Sends and receives communication signal with the ODS unit
15 BRN LFSGround for the left front impact sensor
16 LT BLU RFSGround for the right front impact sensor
17 YEL VASRS system sub power (common with ODS)
18 RED VBSRS dedicated power (dedicated booster circuit)
22 BLK SRS GND (1) Ground circuit for the SRS (G 506)
23 BLK SRS GND (2) Ground circuit for the SRS (G 506)
24 LT BLU K-LINE Sends and receives scan tool signal (serial data)
27 RED LFSPower source for the left front impact sensor
28 GRN RFSPower 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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Removal Installation
24-204SRS
Side Impact Sensor (First) Replacement
A
C B
B
9.8 N·m
(1.0 kgf·m, 7.2 lbf·ft) A
C
NOTE: Review the seat replacement procedure
(see page 20-118) before doing repairs or service. 1. Do the battery terminal disconnection procedure (see page 22-68), then wait at least 3 minutes
before starting work.
2. Remove the front seat assembly (see page 20-118).
3. Remove the front door sill inner trim (see page 20-66).
4. Remove the lower B-pillar lower trim panel (see page 20-69).
5. Disconnect the floor wire harness 4P connector (A) from the side impact sensor (first) (B).
6. Using a TORX T30 bit, remove the TORX bolt (C), then remove the side impact sensor (first). 1. Install the side impact sensor (first) (A) with a new
TORX bolt (B), then connect the floor wire harness
4P connector (C) to the side impact sensor (first).
2. Do the battery terminal reconnection procedure (see page 22-68).
3. Reinstall all removed parts.
4. Clear any DTCs (see page 24-23).
5. Confirm proper operation: Turn the ignition switch to ON (II); the SRS indicator should come on for
about 6 seconds and then go off.
Replace.
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Removal Installation
24-209
ODS Unit Replacement
B
AC
D
D
CA
B
NOTE: Review the seat replacement procedure
(see page 20-118) before doing repairs or service.
1. Do the battery terminal disconnection procedure (see page 22-68), then wait at least 3 minutes
before starting work.
2. Remove the passenger’s seat assembly (see page 20-118) and seat-back cover (see page 20-127).
3. Disconnect the ODS unit 18P connector (A) and OPDS sensor connectors (B) from the ODS unit (C).
4. Remove the two nuts (D) and the ODS unit. 1. Place the ODS unit (A) on the seat-back frame.
Tighten the two nuts (B), and connect the ODS unit
harness 18P connector (C) and OPDS sensor
connectors (D) to the ODS unit.
2. Install the seat-back cover in the reverse order of removal.
3. Do the battery terminal reconnection procedure (see page 22-68).
4. Set the seat-back in the normal position, and make sure there is nothing on the front passenger’s seat.
5. Initialize the ODS unit (see page 24-26).
6. Clear any DTCs (see page 24-23).
7. Confirm proper system operation: Turn the ignition switch to ON (II); the SRS indicator should come on
for about 6 seconds and then go off.
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