Battery ACURA CSX 2006 Service Repair Manual


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YES
NO
YES
NO
19-77
ABS MODULATOR-CONTROL UNIT 25P CONNECTORMR B (RED)
9. Reconnect the ABS modulator-control unit 25Pconnector.
10. Turn the ignition switch to ON (II).
11. Clear the DTC with the HDS.
12. Turn the ignition switch to LOCK (0), then turn it to ON (II) again.
13. Check for DTCs with the HDS.
Replace the ABS modulator-control unit
(see page 19-90).
Troubleshooting is complete. 14. Disconnect the ABS modulator-control unit 25P
connector (see step 2 on page 19-90).
15. Measure the voltage between ABS modulator- control unit 25P connector terminal No. 9 and body
ground.
Check for loose terminals in the ABS
modulator-control unit 25P connector. If necessary,
substitute a known-good ABS modulator-control
unit (see page 19-90), and retest.
Repair open in the wire between the No. 3
(30 A) fuse in the under-hood fuse/relay box and
the ABS modulator-control unit.
Wire side of female terminals
I s DT C 5 1-12 i nd i cat ed ?
Is there battery voltage?
08/08/21 15:03:15 61SNR030_190_0077
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YES
NO YES
NO
DTC 61-01:
DTC 61-21:
DTC 61-22:
DTC 61-23:
19-8119-81
ABS MODULATOR-CONTROL UNIT 25P CONNECTOR
FSR B (WHT)
14. Disconnect the ABS modulator-control unit 25Pconnector (see step 2 on page 19-90).
15. Measure the voltage between ABS modulator- control unit 25P connector terminal No. 8 and body
ground.
Check for loose terminals in the ABS
modulator-control unit 25P connector. If necessary,
substitute a known-good ABS modulator-control
unit (see page 19-90), and retest.
Repair open in the wire between the No. 3
(30 A) fuse in the under-hood fuse/relay box and
the ABS modulator-control unit. 1. Turn the ignition switch to ON (II).
2. Clear the DTC with the HDS.
3. Turn the ignition switch to LOCK (0), then start the
engine.
4. Check for DTCs with the HDS.
Go to step 5.
Intermittent failure, the system is OK at this
time. Check for loose terminals at the ABS
modulator-control unit 25P connector. Refer to
intermittent failures troubleshooting (see page
19-50).
5. Check and note BATTERY voltage in the ABS DATA LIST with the HDS.
6. Using a voltmeter, measure and note the voltage between the battery terminals.
NOTE: If the battery voltage is below 9.5 V, check
the battery (see page 22-67), and troubleshoot the
alternator regulator circuit (see page 4-28).
(cont’d)ABS Modulator-control Unit Initial
IG Low Voltage
ABS Modulator-control Unit
Power Source Low Voltage 1
ABS Modulator-control Unit
Power Source Low Voltage 2
ABS Modulator-control Unit
Power Source Low Voltage 3
Wire side of female terminals
I s t her e bat t er y v ol t age? I s DT C 61-01, 61-21, 61-22, or 61-23 i nd i cat ed ?
08/08/21 15:03:16 61SNR030_190_0081
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YES
NO
YES
NO
YES
NO
DTC 62-21:
19-8219-82ABS Components
DTC Troubleshooting (cont’d)
7. Compare the data list voltage noted in step 5 to the
battery voltage in step 6.
Intermittent failure, the system is OK at this
time. Check for loose terminals at the ABS
modulator-control unit 25P connector. Refer to
intermittent failures troubleshooting (see page
19-50). If the code resets after clearing, replace the
ABS modulator-control unit (see page 19-90).
Check for loose terminals in the ABS
modulator-control unit 25P connector. If necessary,
substitute a known-good ABS modulator-control
unit (see page 19-90), and retest. 1. Turn the ignition switch to ON (II).
2. Clear the DTC with the HDS.
3. Turn the ignition switch to LOCK (0), then start the
engine.
4. Check for DTCs with the HDS.
Go to step 5.
Intermittent failure, the system is OK at this
time.
5. Check and note BATTERY voltage in the ABS DATA LIST with the HDS.
6. Using a voltmeter, measure and note the voltage between the battery terminals.
NOTE: If the voltage is above 15.1 V, troubleshoot
the alternator regulator circuit (see page 4-28).
7. Compare the data list voltage noted in step 5 to the battery voltage in step 6.
Intermittent failure, the system is OK at this
time. Check for loose terminals at the ABS
modulator-control unit 25P connector. Refer to
intermittent failures troubleshooting (see page
19-50). If the code resets after clearing, replace the
ABS modulator-control unit (see page 19-90).
Replace the ABS modulator-control unit
(see page 19-90), and retest.ABS Modulator-control Unit IG
High Voltage
Is t he d i f f er ence bet w een t he t w o v ol t age
r ead i ngs l ess t han 3 V ?
Is DT C 62-21 indicated?
Is t he d i f f er ence bet w een t he t w o v ol t ager ead i ngs l ess t han 3 V ?
08/08/21 15:03:16 61SNR030_190_0082
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ABS indicator and brake system indicator do
not go off
YES
NO
YES
NO YES
NO
YES
NO
19-88ABS Components
Symptom Troubleshooting
ABS MODULATOR-CONTROL UNIT 25P CONNECTOR
IG1 (YEL)*
*1: ’06 model
*2: ’07 model (GRY)*
ABS MODULATOR-CONTROL UNIT 25P CONNECTOR
IG1 (YEL)*
*1: ’06 model
*2: ’07 model (GRY)*
1
2
12
1. Turn the ignition switch to LOCK (0).
2. Check the No. 4 (7.5 A) fuse in the under-dash fuse/ relay box.
Go to step 3.
Reinstall the checked fuse, then go to step 8.
3. Disconnect the ABS modulator-control unit 25P connector (see step 2 on page 19-90).
4. Check for continuity between ABS modulator- control unit 25P connector terminal No. 16 and
body ground.
Repair short to body ground in the wire
between the No. 4 (7.5 A) fuse in the under-dash
fuse/relay box and the ABS modulator-control
unit.
Install a new No. 4 (7.5 A) fuse in the under-
dashfuse/relaybox,thengotostep5. 5. Reconnect the ABS modulator-control unit 25P
connector.
6. Turn the ignition switch to ON (II).
7. Check the ABS indicator and the brake system indicator for several sec onds when the ignition
switch is tuned to ON (II).
Troubleshooting is complete.
Replace the ABS modulator-control unit
(see page 19-90).
8. Disconnect the ABS modulator-control unit 25P connector (see step 2 on page 19-90).
9. Turn the ignition switch to ON (II).
10. Measure the voltage between ABS modulator- control unit 25P connector terminal No. 16 and
body ground.
Go to step 11.
Repair open in the wire between the No. 4
(7.5 A) fuse in the under-dash fuse/relay box and
the ABS modulator-control unit.
11. Turn the ignition switch to LOCK (0).
Wire side of female terminals
Wire side of female terminals
Isthefuseblown?
Is there continuity? Does t he i nd i cat or s come on t hen go of f ?
Is there battery voltage?
08/08/21 15:03:17 61SNR030_190_0088
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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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VSA Modulator-Control Unit Inputs and Outputs for 37P Connector (Connector Disconnected)
TerminalnumberWire color Terminal sign Description Signal
19-106VSA System Components
System Description
NOTE: Standard battery voltage is about 12 V.
1 RED CAN-L F-CAN communication circuit
3 BLU STR-D Detects steering angle sensor signal
6 PNK FR-GND Detects right-front wheel speed sensor signal
7 ORN SVCC Power source for the steering angle sensor With ignition switch ON (II): about 5.0 V
8 PUR RL-GND Detects left-rear wheel speed sensor signal
9 LT GRN RR B Detects right-rear wheel speed sensor signal
10 BRN SGND Ground for the steering angle sensor
11 RED FL-GND Detects left-front wheel speed sensor signal
13 WHT FSR B Power source for the fail-safe relay Battery voltage at all times
14 RED MR B Power source for the motor relay Battery voltage at all times
Wire side of female terminals
08/08/21 15:04:53 61SNR030_190_0106
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TerminalnumberWire color Terminal sign Description Signal
19-107
NOTE: Standard battery voltage is about 12 V.
15 WHT CAN-H F-CAN communication circuit
17 PUR STR-B Detects steering angle sensor signal
19 GRN FR B Detects right-front wheel speed sensor signal
20 YEL RL B Detects left-rear wheel speed sensor signal
21 BLU RR-GND Detects right-rear wheel speed sensor signal
22 WHT FL B Detects left-front wheel speed sensor signal
26 LT BLU K-LINE Communication with HDS
28 GRY IG1 Power source for activating the system With ignition switch ON (II): about battery
voltage
34 GRN STR-A Detects steering angle sensor signal
36 BLK GND Ground for the VSA modulator- control unit Continuity to ground
37 BLK MR-GND Ground for the pump motor Continuity to ground
(cont’d)
08/08/21 15:04:53 61SNR030_190_0107
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19-114VSA System Components
Circuit Diagram
UNDER-DASH
FUSE/RELAY BOX
No. 4 (7.5 A)
IGNITION SWITCH
IG1 HOT in ON (II) and START (III)
BRAKE PEDAL
POSITION SWITCH
Closed: Brake pedal pressed 1
2
WHTRED
YAW RATE-
LATERAL
ACCELERATION
SENSOR
WHT RED 1
3
4
YEL
5
BLK
4
2
1 VSA OFF SWITCH
WHT
WHT
RED
5
No. 3 (40 A)
No.1(100A) No.2(50A)
No. 3 (30 A)
No. 12 (15 A)
UNDER-HOOD FUSE/RELAY BOX
BATTERY
ABS
INDICATOR
BRAKE SYSTEM
INDICATOR
1
VSA ACTIVATION
INDICATOR VSA
INDICATOR
19
28
27
GAUGE CONTROL
MODULE (TACH)
BRNB
WHT
29
RED
GRN
14
RED
G501
C2 C1
E24
F16
YEL
G602
BLU
LT GRN GRYREDBRN
BLK
WHT
LT GRN GRY
H1
D8 36 D2
G502
BLK
WHT
RED
WHT
LT BLU
B
G401
BRAKE FLUID
LEVEL SWITCH
Closed: Low fluid
1 2
BLK
ORN ORN
1
PARKING
BRAKE SWITCH
Closed: Parking
brake applied DATA LINK
CONNECTOR (DLC)
ORN
IG1
6
16
4 714
08/08/21 15:04:55 61SNR030_190_0114
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DTC 25-14:
DTC 25-15:
DTC 25-17: DTC 25-19:
DTC 25-23:
YES
NO YES
NO
19-12719-127
Yaw Rate/Lateral Acceleration
Sensor Circuit High Voltage
Yaw Rate/Lateral Acceleration
Sensor Circuit Low Voltage
Yaw Rate/Lateral Acceleration
Sensor Power Source Voltage Malfunction Yaw Rate/Lateral Acceleration
Sensor Startup Time Malfunction
Yaw Rate Sensor Circuit
Intermittent Interruption
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.
If DTC 61-01, 61-21, 61-22, 61-23, and/or
62-21 is indicated at the same time, check the
battery performance (see page 22-67), and do the
alternator and regulator circuit troubleshooting first
(see page 4-28). If DTC 61-01, 61-21, 61-22, 61-23,
and/or 62-21 is not indicated at the same time,
replace the yaw rate-lateral acceleration sensor
(see page 19-169).
Intermittent failure, the system is OK at this
time. 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. Wait 60 seconds or more.
5. Check for DTCs with the HDS.
Replace the yaw rate-lateral acceleration
sensor (see page 19-169).
Intermittent failure, the system is OK at this
time.
Is DT C 25-14, 25-15, or 25-17 indicated? I s DT C 25 -19 or 25 -23 i nd i cat ed ?
08/08/21 15:05:53 61SNR030_190_0127
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YES
NO YES
NO
DTC 52-12:
19-14019-140VSA System Components
DTC Troubleshooting (cont’d)
MR B (RED)
VSA MODULATOR-CONTROL UNIT 37P CONNECTOR
14. Disconnect the VSA modulator-control unit 37P
connector (see step 2 on page 19- 171).
15. Measure the voltage between VSA modulator- control unit 37P connector terminal No. 14 and
body ground.
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.
Repair open in the wire between the No. 3
(30 A) fuse in the under-hood fuse/relay box and
the VSA modulator-control unit. 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. Operate any one of the four solenoids, as listed, in the VSA FUNCTION TEST five times with the HDS.
-LFT FT SOLENOID
-RT FT SOLENOID
-LFT REAR SOLENOID
-RT REAR SOLENOID
5. Check for DTCs with the HDS.
Replace the VSA modulator-control unit
(see page 19-171).
Intermittent failure, the system is OK at this
time.Motor Stuck OFF
Wire side of female terminals
Is there battery voltage? Is DTC 52-12 indicated?
08/08/21 15:05:56 61SNR030_190_0140
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