2006 ACURA CSX lock

Î
Rear
19-93
Right side
9.8 N·m
(1.0 kgf·m,
7.2 lbf·ft) A
B
C
1. Turn the ignition switch to LOCK (0).
2. Release the connector clamp (A), then disconnect the wheel speed sensor connector (B).
3. Remove the clips, the bolt, and the wheel speed sensor (C). (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.
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How to Use the HDS (Honda Diagnostic
System)How to Retrieve DTCs
How to Clear DTCs
19-99
A
1. If the system indicators stay on, connect the HDS to
the data link connector (DLC) (A) located under the
driver’s side of the dashboard.
2. Turn the ignition switch to ON (II).
3. Make sure the HDS communicates with the vehicle and the VSA modulator-control unit. If it doesn’t,
troubleshoot the DLC circuit (see page 11- 204).
4. Check the diagnostic trouble code (DTC) for all systems, troubleshoot the powertrain DTCs first
and note it. Then refer to the indicated DTC’s
troubleshooting, and do the appropriate
troubleshooting procedure.
NOTE: The HDS communication stops when the vehicle speed is at 50 km/h (31 mph) or more.
 The HDS reads the DTC, current data, and other system data.
 For specific operations, refer to the Help menu that came with the HDS. 1. With the ignition switch in LOCK (0), connect the
HDS to the data link connector (DLC) under the
driver’s side of the dashboard.
2. Turn the ignition switch to ON (II).
3. Make sure the HDS communicates with the vehicle and the VSA modulator-control unit. If it doesn’t
troubleshoot the DLC circuit (see page 11-204).
4. Follow the prompts on the HDS to display the DTC(s) on the screen. After determining the DTC,
refer to the DTC troubleshooting. Do the all
systems DTC check, and troubleshoot any
powertrain DTCs first.
5. Turn the ignition switch to LOCK (0).
1. With the ignition switch in LOCK (0), connect the HDS to the data link connector (DLC) under the
driver’s side of the dashboard.
2. Turn the ignition switch to ON (II).
3. Make sure the HDS communicates with the vehicle and the VSA modulator-control unit. If it doesn’t
troubleshoot the DLC circuit (see page 11-204).
4. Clear the DTC(s) by following the screen prompts on the HDS.
5. Turn the ignition switch to LOCK (0).
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DTCDetection Item ABS
Indicator Brake
System
Indicator VSA
Indicator VSA
Activation Indicator Note
19-102VSA System Components
DTC Troubleshooting Index (cont’d)
33 -01 ABS Left-front Inlet Solenoid Valve Malfunction
(Solenoid Initial Pulse) ON ON ON ON (see page 19-136)
-21 ABS Left-front Inlet Solenoid Valve Malfunction (Solenoid Pulse) ON ON ON ON (see page 19-136)
-22 ABS Left-front Inlet Solenoid Valve Malfunction (Solenoid Speculative) ON ON ON ON (see page 19-136)
-23 ABS Left-front Inlet Solenoid Valve Malfunction (Solenoid Stuck ON) ON ON ON ON (see page 19-136)
34 -01 ABS Left-front Outlet Solenoid Valve Malfunction (Solenoid Initial Pulse) ON ON ON ON (see page 19-136)
-21 ABS Left-front Outlet Solenoid Valve Malfunction (Solenoid Pulse) ON ON ON ON (see page 19-136)
-22 ABS Left-front Outlet Solenoid Valve Malfunction (Solenoid Speculative) ON ON ON ON (see page 19-136)
-23 ABS Left-front Outlet Solenoid Valve Malfunction (Solenoid Stuck ON) ON ON ON ON (see page 19-136)
35 -01 ABS Right-rear Inlet Solenoid Valve Malfunction (Solenoid Initial Pulse) ON ON ON ON (see page 19-136)
-21 ABS Right-rear Inlet Solenoid Valve Malfunction (Solenoid Pulse) ON ON ON ON (see page 19-136)
-22 ABS Right-rear Inlet Solenoid Valve Malfunction (Solenoid Speculative) ON ON ON ON (see page 19-136)
-23 ABS Right-rear Inlet Solenoid Valve Malfunction (Solenoid Stuck ON) ON ON ON ON (see page 19-136)
36 -01 ABS Right-rear Outlet Solenoid Valve Malfunction (Solenoid Initial Pulse) ON ON ON ON (see page 19-136)
-21 ABS Right-rear Outlet Solenoid Valve Malfunction (Solenoid Pulse) ON ON ON ON (see page 19-136)
-22 ABS Right-rear Outlet Solenoid Valve Malfunction (Solenoid Speculative) ON ON ON ON (see page 19-136)
-23 ABS Right-rear Outlet Solenoid Valve Malfunction (Solenoid Stuck ON) ON ON ON ON (see page 19-136)
37 -01 ABS Left-rear Inlet Solenoid Valve Malfunction (Solenoid Initial Pulse) ON ON ON ON (see page 19-136)
-21 ABS Left-rear Inlet Solenoid Valve Malfunction (Solenoid Pulse) ON ON ON ON (see page 19-136)
-22 ABS Left-rear Inlet Solenoid Valve Malfunction (Solenoid Speculative) ON ON ON ON (see page 19-136)
-23 ABS Left-rear Inlet Solenoid Valve Malfunction (Solenoid Stuck ON) ON ON ON ON (see page 19-136)
38 -01 ABS Left-rear Outlet Solenoid Valve Malfunction (Solenoid Initial Pulse) ON ON ON ON (see page 19-136)
-21 ABS Left-rear Outlet Solenoid Valve Malfunction (Solenoid Pulse) ON ON ON ON (see page 19-136)
-22 ABS Left-rear Outlet Solenoid Valve Malfunction (Solenoid Speculative) ON ON ON ON (see page 19-136)
-23 ABS Left-rear Outlet Solenoid Valve Malfunction (Solenoid Stuck ON) ON ON ON ON (see page 19-136)
41 -21 Right-front Wheel Lock ON ON/OFF ON ON (see page 19-137)
42 -21 Left-front Wheel Lock ON ON/OFF ON ON (see page 19-137)
43 -21 Right-rear Wheel Lock ON ON/OFF ON ON (see page 19-137)
44 -21 Left-rear Wheel Lock ON ON/OFF ON ON (see page 19-137)
51 -11 Motor Lock ON OFF ON ON (see page 19-138) -12 Motor Lock Circuit Malfunction ON OFF ON ON (see page 19-138)
-13 Motor Relay OFF Malfunction ON OFF ON ON (see page 19-138)
52 -12 Motor Stuck OFF ON OFF ON ON (see page 19-140)
53 -01 Motor Relay Stuck ON 1 ON OFF ON ON (see page 19-141) -12 Motor Relay Stuck ON 2 ON OFF ON ON (see page 19-141)
54 -03 Fail-safe Relay 1 Stuck ON ON ON ON ON (see page 19-142) -04 Fail-safe Relay 1 Stuck OFF (Initial) ON ON ON ON (see page 19-142)
-21 Fail-safe Relay 1 Stuck OFF (Main) ON ON ON ON (see page 19-142)
56 -01 Initial VIG FET Stuck OFF ON ON ON ON (see page 19-142) -02 Initial VIG FET Stuck ON ON ON ON ON (see page 19-142)
-11 VIG FET Stuck OFF ON ON ON ON (see page 19-142)
1: Brake system indicator turns ON when two or more wheels fail.
1
1
1
1
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ABS Features
Anti-lock control
Grip force of tire and road surface
Main Control
19-109
COEFFICIENT OF
FRICTIONTARGET SLIP RATE
ROTATIONAL
DIRECTION
RADIAL
DIRECTION
OF THE
ROTATIONAL
DIRECTION
SLIP RATE
LEFT-REAR
WHEEL SPEED
SENSOR RIGHT-REAR
WHEEL SPEED
SENSOR
LEFT-FRONT
WHEEL SPEED
SENSOR RIGHT-FRONT
WHEEL SPEED
SENSOR Select Low
Speed Wheel
Detect
Vehicle Speed
Drive
SolenoidRIGHT-REAR
SOLENOID
LEFT-REAR
SOLENOID
RIGHT-FRONT
SOLENOID
LEFT-FRONT
SOLENOID
CONTROL UNIT
ABS
Control
Reference
Slip Rate
Drive
Solenoid
ABS
Control
Drive
Solenoid
ABS
Control
Drive
Solenoid
ABS
Control
RIGHT-FRONT
LEFT-FRONT
Detect
Wheel Speed
Detect
Slip Rate
RIGHT-REAR
LEFT-REAR Detect
Slip Rate
Detect
Slip Rate
Detect
Slip Rate
Detect
Wheel Speed
Detect
Wheel Speed
Detect
Wheel Speed
Without ABS, when the brake pedal is pressed while driving, the wheels sometimes lock before the vehicle comes to a
stop. In such an event, the maneuverability of the vehicle is reduced if the front wheels are locked, and the stability of
the vehicle is reduced if the rear wheels are locked, creating an extremely unstable condition. With ABS, the system
precisely controls the slip rate of the wheels to ensure maximum grip force from the tires, and it thereby ensures
maneuverability and stability of the vehicle. The ABS calculates the slip rate of the wheels based on the four wheel
speeds, and then it controls the brake fluid pressure to reach the target slip rate.
The control unit detects the wheel speed based on the wheel speed sensor signals it receives, then it calculates the
vehicle speed based on the detected wheel speed. The control unit detects the vehicle speed during deceleration
based on the wheel speeds.
The control unit calculates the slip rate of each wheel, and transmits the control signal to the modulator unit solenoid
valve when the slip rate is high.
The hydraulic control has three modes: Pressure intensifying, pressure reducing, and pressure retaining.
(cont’d)
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Modulator Unit
Mode VSA NOValveVSA NC
Valve Inlet
Solenoid Valve Outlet
Solenoid Valve Brake Fluid
Pressure
intensifying
mode
Pressure
retaining
mode
Pressure
reducing
mode
Pressure
adding
mode
19-113
FL RR RL
FR
OUT OUT
IN
IN
VSA NO VSA NC
REGULATOR
VALVE PRESSURE
SENSOR
DAMPING
CHAMBER
RESERVOIR MOTOR
RESERVOIRVSA NC VSA NO
REGULATOR
VALVE IN
IN OUT
OUT
MODULATOR UNIT
IN : INLET SOLENOID VALVE (NORMALLY OPEN)
OUT : OUTLET SOLENOID VALVE (NORMALLY CLOSED)
MASTER CYLINDER
The modulator unit consists of the inlet solenoid valve, the outlet solenoid valve, the VSA NO (normally open)
solenoid valve, the VSA NC (normally closed) solenoid valve, the reservoir, the pump, the pump motor, and the
damping chamber.
The hydraulic control has three modes at ABS action; pressure intensifying, pressure retaining, and pressure reducing.
Pressure adding mode is combined the TCS, VSA, and brake assist action.
The hydraulic circuit is an independent four channel type; one channel for each wheel.




open closed open closed Master cylinder fluid is pumped out to
the caliper.
open closed closed closed Caliper fluid is retained by the inlet and outlet valves.
open closed closed open Caliper fluid flows through the outlet valve to the reservoir.
The motor pumps the reservoir fluid
through the damping chamber to
the master cylinder .
closed open open closed Master cylinder fluid is pumped out by pump with motor through VSA
NC valve to the caliper.
Caliper fluid pressure exceeds
master cylinder pressure.
: The motor will keep running until the operation of the one anti-lock brake control is finished with the first pressure reducing mode.
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´ ´
´ ´
µ
µ µ
µ
DTC 11-13:
DTC 13-13:
DTC 15-13:
DTC 17-13:
YES
NO DTC VSA Modulator-control Unit 37P
Connector Terminal
YES
NO
19-117
DTC Troubleshooting
VSA MODULATOR-CONTROL UNIT 37P CONNECTOR FR B (GRN)RL-GND (PUR)
FR-GND (PNK) RR B (LT GRN)
RL B (YEL) FL B (WHT)
RR-GND (BLU) FL-GND (RED)
Right-front Wheel Speed Sensor
Circuit Malfunction
Left-front Wheel Speed Sensor
Circuit Malfunction
Right-rear Wheel Speed Sensor
Circuit Malfunction
Left-rear Wheel Speed Sensor
Circuit Malfunction
1. Turn the ignition switch to ON (II).
2. Clear the DTC with the HDS.
3. Turn the ignition switch to LOCK (0), then turn it to
ON (II) again.
4. Check for DTCs with the HDS.
Go to step 5.
Intermittent failure, the system is OK at this
time. Check for loose terminals between the wheel
speed sensor 2P connector and the VSA modulator-
control unit 37P connector. Refer to intermittent
failures troubleshooting (see page 19-98).
5. Turn the ignition switch to LOCK (0).
6. Disconnect the VSA modulator-control unit 37P connector (see step 2 on page 19- 171).
7. Disconnect the appropriate wheel speed sensor 2P connector. 8. Check for continuity between the appropriate VSA
modulator-control unit 37P connector wheel speed
sensor B and GND terminals (see table).
11-13 No. 19 No. 6
13-13 No. 22 No. 11
15-13 No. 9 No. 21
17-13 No. 20 No. 8
Repair short in the wires between the
appropriate wheel speed sensor and the VSA
modulator-control unit.
Go to step 9.
(cont’d)
Wire side of female terminals
I s DT C 11-13, 13-13, 15 -13, and / or 17 -13indicated?
Is there continuity?
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)
µ
µ µ
µ
YES
NO
YES
NO
DTC 12-11:
DTC 14-11:
DTC 16-11:
DTC 18-11:
19-12019-120VSA System Components
DTC Troubleshooting (cont’d)
14. Turn the ignition switch to LOCK (0).
15. Substitute the appropriate wheel speed sensor with
opposite wheel speed sensor, or with a known-
good wheel speed sensor.
16. Reconnect all connectors.
17. Turn the ignition switch to ON (II).
18. Clear the DTC with the HDS.
19. Turn the ignition switch to LOCK (0), then turn it to ON (II) again.
20. Check for DTCs with the HDS.
Check for loose terminals in the VSA
modulator-control unit 37P connector. If necessary,
substitute a known-good VSA modulator-control
unit (see page 19-171), and retest.
Replace the original wheel speed sensor
(see page 19-173). NOTE: These DTCs may be caused by electrical
interference. Check for aftermarket devices installed in
the vehicle when these DTCs are indicated.
1. Turn the ignition switch to ON (II).
2. Clear the DTC with the HDS.
3. Test-drive the vehicle. NOTE: Drive the vehicle on the road, not on a lift.
4. Check for DTCs with the HDS.
If DTC 12-12, 14-12, 16-12, or 18-12 is
indicated at the same time, do the DTC 12-12,
14-12, 16-12, or 18-12 troubleshooting first
(see page 19-121). If DTC 12-12, 14-12, 16-12, or
18-12 is not indicated, go to step 5.
If any other DTCs are indicated, go to the
indicated DTCs troubleshooting. If DTCs are not
indicated, there is an intermittent failure, the
system is OK at this time. Check for loose terminals
between the wheel speed sensor 2P connector and
the VSA modulator-control unit 37P connector.
Refer to intermittent failures troubleshooting
(see page 19-98).Right-front Wheel Speed Sensor
Electrical Noise or Intermittent Interruption
Left-front Wheel Speed Sensor
Electrical Noise or Intermittent Interruption
Right-rear Wheel Speed Sensor
Electrical Noise or Intermittent Interruption
Left-rear Wheel Speed Sensor
Electrical Noise or Intermittent Interruption
I s DT C i nd i cat ed t hat i s i nd i cat ed i n st ep 4?
I s DT C 12 -11, 14-11, 16-11, and / or 18-11indicated?
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