2006 ACURA CSX brake fluid

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19-62ABS Components
Circuit Diagram
BATTERY
UNDER-HOOD FUSE/RELAY BOX
1
19
2827
G502
BLK
WHT
RED
WHT
WHT
RED
ABS
INDICATOR
BRAKE SYSTEM
INDICATOR
GAUGE CONTROL
MODULE (TACH)
LT GRNGRN
LT BLUWHT
RED
IGNITION SWITCH
IG1 HOT in ON (II) and START (III) WHT
LT GRN
WHT
RED BLU
WHT BRAKE PEDAL
POSITION SWITCH
Closed: Brake pedal pressed1
2
C1
C2 UNDER-DASH
FUSE/RELAY BOX
No. 4 (7.5 A)
No. 3 (30 A)
No.1(100A) No.2(50A)
No. 3 (30 A)
No. 12 (15 A) F16
B
G401
BRAKE FLUID
LEVEL SWITCH
Closed: Low fluid
1 2
BLK
ORN
H1
D8
3
6
ORN
1
PARKING
BRAKE SWITCH
Closed: Parking
brake applied DATA LINK
CONNECTOR (DLC)D2
YEL*
GRY*
ORN
6
16
4 7 14
IG11
2
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19-64ABS Components
Circuit Diagram (cont’d)
UNDER-HOOD FUSE/RELAY BOX
CONNECTOR C (2P)
BRAKE PEDAL POSITION
SWITCH 4P CONNECTORBRAKE FLUID LEVEL SWITCH
2P CONNECTOR
DATA LINK CONNECTOR (DLC)
ECM/PCM CONNECTOR A (44P)
ABS MODULATOR-CONTROL UNIT 25P CONNECTOR PARKING BRAKE SWITCH
1P CONNECTOR
WHEEL SPEED SENSOR
2P CONNECTOR
UNDER-DASH FUSE/RELAY BOX CONNECTOR F (34P)
GAUGE CONTROL MODULE (TACH) 36P CONNECTOR
Wire side of female terminals
Terminal side of female terminals
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µ
µ
µ
µ
µ
µ
YES
NO
DTC Appropriate Wheel
YES
NO
YES
NO
DTC 41-21:
DTC 42-21:
DTC 43-21:
DTC 44-21:
19-7419-74 ABS Components
DTC Troubleshooting (cont’d)
4. Check for DTCs with the HDS.
Replace the ABS modulator-control unit
(see page 19-90).
Intermittent failure, the system is OK at this
time. The DTCs may be indicated under these conditions:
 The vehicle goes into a spin.
 The ABS continues to operate for a long time.
 Snow, dirt, or debris build-up on the wheel speed sensor or magnetic encoder.
 Misadjusted brake pedal position switch.
 Contaminated brake fluid.
1. Raise the vehicle, and support it with safety stands in the proper locations (see page 1-11).
2. Turn the appropriate wheel by hand.
41-21 Right-front
42-21 Left-front
43-21 Right-rear
44-21 Left-rear
Repair the brake drag.
Go to step 3.
3. Check that the appropriate wheel speed sensor is properly mounted (see page 19-92).
Go to step 4.
Reinstall the wheel speed sensor, and check
the mounting position (see page 19-92).Right-front Wheel Lock
Left-front Wheel Lock
Right-rear Wheel Lock
Left-rear Wheel Lock
Is DT C 31-xx, 32-xx, 33-xx, 34-xx, 35-xx, 36-xx, 37 -x x , or 38-x x i nd i cat ed ?
Is there brake drag?Is t he w heel speed sensor i nst al l at i on OK ?
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Removal
19-90ABS Components
ABS Modulator-Control Unit Removal and Installation
A
B C
15 N·m
(1.5 kgf·m, 11 lbf·ft)
D
E
I F
G
H 15 N·m
(1.5 kgf·m, 11 lbf·ft)
9.8 N·m
(1.0 kgf·m, 7.2 lbf·ft) 9.8 N·m
(1.0 kgf·m, 7.2 lbf·ft)
NOTE:
 Do not spill brake fluid on the vehicle; it may damage the paint; if brake fluid gets on the paint, wash it off immediately with water.
 Be careful not to damage or deform the brake lines during removal and installation.
 Plug the ends of the hoses and the joints to prevent spilling brake fluid.
1. Turn the ignition switch to LOCK (0).
2. Disconnect the ABS modulator-control unit 25P connector (A) by pu lling up the lock (B); the connector disconnects
itself.
3. Disconnect the six brake lines from the ABS modulator-control unit. NOTE: Brake lines are connected to the master cylinder (C) and to the right-front (D), the left-rear (E), the right-rear
(F), and the left-front (G) brake systems.
4. Remove the ABS modulator-control unit (H) with the brackets (I) from the body.
5. Remove the ABS modulator-control unit from the brackets.
6. Separate the bracket if necessary.
08/08/21 15:03:18 61SNR030_190_0090
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System IndicatorABS Indicator
Brake System Indicator
VSA Indicator
VSA Activation Indicator
19-97
General Troubleshooting Information
A
D B
C
This system has four indicators:
 ABS indicator (A)
 Brake system indicator (B)
 VSA indicator (C)
 VSA activation indicator (D)
When the system is OK, each indicator comes on for
about 2 seconds after turning the ignition switch to
ON (II), then goes off.
When the system detects a problem, a DTC is set and,
depending upon the failure, the VSA modulator-control
unit determines which indicator(s) are turned on. If the
problem goes away (system returns to normal), the
indicator(s) are controlled in the following way
depending upon the DTC that is set:  The indicator(s) come on and stay on when the ignition switch is ON (II).
 The indicator(s) automatically go off.
 The indicator(s) go off after the vehicle is driven. The ABS indicator comes on when the ABS function is
lost. The brakes still work like a conventional system.
The brake system indicator comes on when the EBD
function is lost, the parking brake is applied, and/or the
brake fluid level is low.
NOTE: If two or more wheel speed sensors fail, the
brake system indicator comes on.
The VSA indicator comes on when the VSA function is
lost.
The VSA activation indicator blinks when the VSA
function is activating. The VSA activation indicator
comes on and stays on when the VSA is turned OFF by
using the VSA OFF switch, or when the VSA function is
lost.
(cont’d)
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Diagnostic Trouble Code (DTC)
Self-diagnosis
Kickback
Pump Motor
Brake Fluid Replacement/Air BleedingHow to Troubleshoot DTCs
Intermittent Failures
19-98
VSA System Components
General Troubleshooting Information (cont’d)
 The memory holds all DTCs. However, when the
same DTC is detected more than once, the more
recent DTC is written over the earlier one. Therefore,
when the same problem is detected repeatedly, it is
memorized as a single DTC.
 The DTCs are indicated in the order they occur.
 The DTCs are memorized in the EEPROM. Therefore, the memorized DTCs cannot be erased by
disconnecting the battery. Do the specified
procedures to clear the DTCs.
 Self-diagnosis can be classified into two categories: – Initial diagnosis: Done right after the ignition switch is turned to ON (II) and until the ABS and VSA
indicators go off.
– Regular diagnosis: Done right after the initial diagnosis until the ignition switch is turned to
LOCK (0).
 When the system detects a problem, the VSA modulator-control unit shifts to fail-safe mode.
The pump motor operates when the VSA modulator-
control unit is functioning, and the fluid in the reservoir
is forced out to the master cylinder, causing kickback at
the brake pedal.  The pump motor operates when the VSA modulator- control unit is functioning.
 The VSA modulator-control unit checks the pump motor operation one time after completing initial
diagnosis during regular diagnosis when the vehicle
is driven over 15 km/h (10 mph).
Brake fluid replacement and air bleeding procedures
are identical to the procedures used on vehicles without
the VSA system (see page 19-9). The troubleshooting procedures assume that the cause
of the problem is still present, and the ABS and/or VSA
indicator is still on. Following a troubleshooting
procedure for a code that has been cleared but does not
reset can result in incorrect diagnosis.
1. Question the client about the conditions when the problem occurred, and try to reproduce the same
conditions for troubleshooting. Find out when the
ABS and/or VSA indicator came on, such as during
activation, after activation, when the vehicle was
traveling at a certain speed, etc. If necessary, have
the client demonstrate the concern.
2. When the ABS or VSA indicator does not come on during the test-drive, check for loose connectors,
poor contact of the terminals, etc. in the circuit
indicated by the DTC before you start
troubleshooting.
3. After troubleshooting, or the repairs are done, clear the DTCs, and test-drive the vehicle under the same
conditions that originally set the DTCs. Make sure
the ABS and VSA indicators do not come on.
4. Check for DTCs from other systems which are connected via F-CAN. If there are DTCs that are
related to F-CAN, one possible cause was that the
ignition switch was turned to ON (II) with the VSA
modulator-control unit connector disconnected.
Clear the DTCs. Check for fuel and emissions DTC’s
first.
NOTE: Always troubleshoot fuel and emissions
DTC’s first.
The term ‘‘intermittent failure’’ means a system may
have had a failure, but it checks OK now. If you cannot
reproduce the condition, check for loose connectors or
terminal pins related to the circuit that you are
troubleshooting.
08/08/21 15:04:50 61SNR030_190_0098
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DTCDetection Item ABS
Indicator Brake
System
Indicator VSA
Indicator VSA
Activation Indicator Note
19-103
61 -01 VSA Modulator-control Unit Initial IG Low Voltage ON ON ON ON (see page 19-143)
-21 VSA Modulator-control Unit Power Source LowVoltage 1 ON ON ON ON (see page 19-143)
-22 VSA Modulator-control Unit Power Source Low Voltage 2 ON OFF ON ON (see page 19-143)
-23 VSA Modulator-control Unit Power Source Low Voltage 3 ON ON ON ON (see page 19-143)
62 -21 VSA Modulator-control Unit IG High Voltage ON ON ON ON (see page 19-144)
64 -11 Steering Angle Sensor Power Circuit Short OFF OFF ON ON (see page 19-144) -12 Steering Angle Sensor Power Circuit Open OFF OFF ON ON (see page 19-145)
65 -21 Brake Fluid Level Stuck ON OFF OFF ON ON (see page 19-147)
66 -11 Pressure Sensor (Inside of VSA Modulator-control Unit) Malfunction OFF OFF ON ON (see page 19-148)
-12 Pressure Sensor (Inside of VSA Modulator-control Unit) Malfunction OFF OFF ON ON (see page 19-148)
-13 Pressure Sensor (Inside of VSA Modulator-control Unit) Malfunction OFF OFF ON ON (see page 19-148)
-14 Pressure Sensor (Inside of VSA Modulator-control Unit) Malfunction OFF OFF ON ON (see page 19-148)
-15 Pressure Sensor (Inside of VSA Modulator-control Unit) Malfunction OFF OFF ON ON (see page 19-149)
-16 Pressure Sensor (Inside of VSA Modulator-control Unit) Malfunction OFF OFF ON ON (see page 19-148)
68 -21 Brake Pedal Position Switch Stuck OFF OFF OFF ON ON (see page 19-149) -22 Brake Pedal Position Switch Stuck ON OFF OFF ON ON (see page 19-151)
71 -21 Right-front or Left-rear Different Diameter Tire Malfunction ON ON ON ON (see page 19-152)
-22 Left-front or Right-rear Different Diameter Tire Malfunction ON ON ON ON (see page 19-152)
-23 Right-front and Right-rear Different Diameter Tire Malfunction ON ON ON ON (see page 19-152)
-24 Left-front and Left-rear Different Diameter Tire Malfunction ON ON ON ON (see page 19-152)
-25 Right-front and Left-front Different Diameter Tire Malfunction ON ON ON ON (see page 19-152)
-26 Right-rear and Left-rear Different Diameter Tire Malfunction ON ON ON ON (see page 19-152)
-27 Right-front or Left-rear Different Diameter Tire Malfunction OFF OFF ON ON (see page 19-152)
-28 Left-front or Right-rear Different Diameter Tire Malfunction OFF OFF ON ON (see page 19-152)
-29 Right-front and Right-rear Different Diameter Tire Malfunction OFF OFF ON ON (see page 19-152)
-2A Left-front and Left-rear Different Diameter Tire Malfunction OFF OFF ON ON (see page 19-152)
-2B Right-front and Left-front Different Diameter Tire Malfunction OFF OFF ON ON (see page 19-152)
-2C Right-rear and Left-rear Different Diameter Tire Malfunction OFF OFF ON ON (see page 19-152)
81 -01 ON ON ON ON (see page 19-153) -02 ON ON ON ON (see page 19-153)
-03 ON ON ON ON (see page 19-153)
-05 ON ON ON ON (see page 19-153)
-06 ON ON ON ON (see page 19-153)
-07 ON ON ON ON (see page 19-153)
-08 ON ON ON ON (see page 19-153)
-11 ON ON ON ON (see page 19-153)
-12 ON ON ON ON (see page 19-153)
-13 ON ON ON ON (see page 19-153)
-14 ON ON ON ON (see page 19-153)
-21 ON ON ON ON (see page 19-153)
-22 ON ON ON ON (see page 19-153)
-23 ON ON ON ON (see page 19-153)
(cont’d)
Central Processing Unit (CPU) Internal Circuit Malfunction
Central Processing Unit (CPU) Internal Circuit Malfunction
Central Processing Unit (CPU) Internal Circuit Malfunction
Central Processing Unit (CPU) Internal Circuit Malfunction
Central Processing Unit (CPU) Internal Circuit Malfunction
Central Processing Unit (CPU) Internal Circuit Malfunction
Central Processing Unit (CPU) Internal Circuit Malfunction
Central Processing Unit (CPU) Internal Circuit Malfunction
Central Processing Unit (CPU) Internal Circuit Malfunction
Central Processing Unit (CPU) Internal Circuit Malfunction
Central Processing Unit (CPU) Internal Circuit Malfunction
Central Processing Unit (CPU) Internal Circuit Malfunction
Central Processing Unit (CPU) Internal Circuit Malfunction
Central Processing Unit (CPU) Internal Circuit Malfunction
08/08/21 15:04:52 61SNR030_190_0103
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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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