sensor ACURA CSX 2006 Service Repair Manual


EBD Features
19-60ABS Components
System Description (cont’d)
REAR WHEEL
BRAKE PRESSURE
With EBD under HEAVY LOAD
at REAR WHEELS
With EBD under LIGHT LOAD
at REAR WHEELS
Without EBD
FRONT WHEEL BRAKE PRESSURE
The electronic brake distribution (EBD) feature helps control vehicle braking by adjusting the rear brake force in
accordance with the rear wheel load before the ABS operates. Based on the wheel speed sensor signals, the control
unit uses the modulator to control the rear brakes individually. When the rear wheel speed is less than the front wheel
speed, the ABS modulator-control unit retains the current rear brake fluid pressure by closing the inlet valve in the
modulator. As the rear wheel speed increases, and approaches the front wheel speed, the ABS modulator-control unit
increases the rear brake fluid pressure by momentarily opening the inlet valve. This whole process is repeated very
rapidly. While this is happening, kickback may be felt at the brake pedal.
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19-63
ABS MODULATOR-CONTROL UNIT
CONTROL UNIT MODULATOR UNIT
LEFT-FRONT
RIGHT-FRONT LEFT-REAR
RIGHT-REAR
PUMP MOTOR
G202 SOLENOIDS
8
9
12 3
2
18
14 5
6
15
25
24 1
17
10 16
WHT RED
WHT GRN
PNK
PUR YELBLK
BLK
LT GRN
IC
12
1
2
2
1
1 2 LT BLU
REDRED
ECM/PCM
WHT RED A40
A36
A37
WHT RED LT GRN
5V
REGULATOR
CAN
CONTROLLER IG1
ELECTRIC
CURRENT
LIMITATION
B
GND IG1
:12V :5V
RED
LT BLU GRY PUMP MOTOR RELAY
FAIL-SAFE RELAY
WHT BLU YEL*
GRY*
WHEEL SPEED SENSOR *1: ’06 model
*2: ’07 model
INOUT
IN OUT
IN OUT
INOUT
VCC
FSR B MR B
FL B
FL-GND FR B
FR-GND
RL B
RR B
MR-GND GND
CAN-H
CAN-L
K-LINE IG1
RL-GND RR-GND
1 2
(cont’d)
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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
08/08/21 15:03:12 61SNR030_190_0064
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DTC 11-13:
DTC 13-13:
DTC 15-13:
DTC 17-13:
YES
NO DTC ABS Modulator-control Unit 25P
Connector Terminal
YES
NO
19-65
DTC Troubleshooting
FL-GND (RED)
FR B (GRN) RL-GND (PUR)
RR B (LT GRN)
RR-GND (BLU)
RL B (YEL)
FR-GND (PNK)
FL B (WHT)
ABS MODULATOR-CONTROL UNIT 25P CONNECTOR
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 ABS modulator-
control unit 25P connector. Refer to intermittent
failures troubleshooting (see page 19-50).
5. Turn the ignition switch to LOCK (0).
6. Disconnect the ABS modulator-control unit 25P connector (see step 2 on page 19-90).
7. Disconnect the appropriate wheel speed sensor 2P connector. 8. Check for continuity between the appropriate ABS
modulator-control unit 25P connector wheel speed
sensor B and GND terminals (see table).
11-13 No. 2 No. 18
13-13 No. 12 No. 3
15-13 No. 6 No. 15
17-13 No. 14 No. 5
Repair short in the wires between the
appropriate wheel speed sensor and the ABS
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?
08/08/21 15:03:12 61SNR030_190_0065
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DTC
YES
NO DTC
YES
NO
ABS Modulator-
control Unit 25P
Connector Terminal Appropriate Wheel
Speed Sensor 2P
Connector Terminal ABS Modulator-
control Unit 25P
Connector Terminal Appropriate Wheel
Speed Sensor 2P
Connector Terminal
19-66 ABS Components
DTC Troubleshooting (cont’d)
FR B
(GRN)
RL B (YEL)RR B
(LT GRN)
FL B (WHT)
LEFT-
FRONT
RIGHT-
FRONT RIGHT-
REARLEFT-
REAR
WHEEL SPEED SENSOR 2P CONNECTOR
ABS MODULATOR-CONTROL UNIT 25P CONNECTOR FL B
(WHT)
RL B
(YEL)
RR B
(LT BLU)
FR B
(GRN)
RR-GND (BLU)
RIGHT-
FRONT
LEFT-
FRONT LEFT-
REARRIGHT-
REAR
WHEEL SPEED SENSOR 2P CONNECTOR
ABS MODULATOR-CONTROL UNIT 25P CONNECTOR
FR-GND
(PNK)
FL-GND
(RED)
RR-GND
(GRY)
RL-GND
(RED)
RL-GND
(PUR)
FL-GND
(RED)
FR-GND (PNK)
9. Check for continuity between the appropriate ABS modulator-control unit 25P connector terminal and
the wheel speed sensor 2P connector terminal (see
table).
11-13 No. 2 Right-front
13-13 No. 12 Left-front
15-13 No. 6 Right-rear
17-13 No. 14 Left-rear
Go to step 10.
Repair open in the wire between the
appropriate wheel speed sensor and the ABS
modulator-control unit. 10. Check for continuity between the appropriate ABS
modulator-control unit 25P connector terminal and
the wheel speed sensor 2P connector terminal (see
table).
11-13 No. 18 Right-front
13-13 No. 3 Left-front
15-13 No. 15 Right-rear
17-13 No. 5 Left-rear
Go to step 11.
Repair open in the wire between the
appropriate wheel speed sensor and the ABS
modulator-control unit.
Wire side of female terminals
Terminal side of female terminals
Wire side of female terminals
Terminal side of female terminals
Is there continuity?
Is there continuity?
08/08/21 15:03:13 61SNR030_190_0066
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DTC ABS Modulator-control Unit 25P
Connector Terminal
YES
NO DTC ABS Modulator-control Unit 25P
Connector Terminal
YES
NO
19-67
RL-GND (PUR) RR B (LT GRN)
RR-GND
(BLU)
RL B
(YEL)
FR-GND
(PNK) FL B
(WHT)
ABS MODULATOR-CONTROL UNIT 25P CONNECTOR
FR B (GRN)FL-GND (RED)
RL-GND (PUR)RR B (LT GRN)
RR-GND
(BLU)
RL B
(YEL)
FR-GND
(PNK) FL B
(WHT)
ABS MODULATOR-CONTROL UNIT 25P CONNECTOR
FR B (GRN)FL-GND (RED)
11. Check for continuity between body ground and the
appropriate ABS modulator-control unit 25P
connector terminal (see table).
11-13 No. 2 No. 18
13-13 No. 12 No. 3
15-13 No. 6 No. 15
17-13 No. 14 No. 5
Repair short to body ground in the wire
between the appropriate wheel speed sensor and
the ABS modulator-control unit.
Go to step 12. 12. Turn the ignition switch to ON (II).
13. Measure the voltage between body ground and the
appropriate ABS modulator-control unit 25P
connector terminal (see table).
11-13 No. 2 No. 18
13-13 No. 12 No. 3
15-13 No. 6 No. 15
17-13 No. 14 No. 5
Repair short to power in the wire between
the appropriate wheel speed sensor and the ABS
modulator-control unit.
Go to step 14.
(cont’d)
Wire side of female terminals Wire side of female terminals
Is there continuity?Is t her e 0.1 V or mor e?
08/08/21 15:03:13 61SNR030_190_0067
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YES
NO
YES
NO
DTC 12-11:
DTC 14-11:
DTC 16-11:
DTC 18-11:
19-6819-68ABS 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 ABS
modulator-control unit 25P connector. If necessary,
substitute a known-good ABS modulator-control
unit (see page 19-90), and retest.
Replace the original wheel speed sensor
(see page 19-92). 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 19-69). 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 ABS modulator-control unit 25P connector.
Refer to intermittent failures troubleshooting
(see page 19-50).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?
08/08/21 15:03:13 61SNR030_190_0068
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DTC Appropriate Wheel Speed Sensor
YES
NO YES
NO
DTC 12-12:
DTC 14-12:
DTC 16-12:
DTC 18-12:
19-6919-69
5. Turn the ignition switch to LOCK (0).
6. Check that the appropriate wheel speed sensor isproperly mounted (see page 19-92).
12-11 Right-front
14-11 Left-front
16-11 Right-rear
18-11 Left-rear
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.
Reinstall the wheel speed sensor, and check
the mounting position (see page 19-92). 1. Turn the ignition switch to ON (II).
2. Clear the DTC with the HDS.
3. Test-drive the vehicle at 20 km/h (13 mph) or more,
and go a distance of 100 m (328 ft) or more.
NOTE: Drive the vehicle on the road, not on a lift.
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 ABS modulator-
control unit 25P connector. Refer to intermittent
failures troubleshooting (see page 19-50).
5. Turn the ignition switch to LOCK (0).
6. Disconnect the ABS modulator-control unit 25P connector (see step 2 on page 19-90).
(cont’d)Right-front Wheel Speed Sensor
Short to the Other Sensor Circuit
Left-front Wheel Speed Sensor
Short to the Other Sensor Circuit
Right-rear Wheel Speed Sensor
Short to the Other Sensor Circuit
Left-rear Wheel Speed Sensor
Short to the Other Sensor Circuit
Is t he w heel speed sensor i nst al l at i on OK ?
I s DT C 12 -12 , 14-12 , 16-12 , and / or 18-12indicated?
08/08/21 15:03:13 61SNR030_190_0069
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DTC YES
NO
ABS Modulator-control Unit 25P
Connector Terminal
Appropriate Terminal Other Terminals
19-70ABS Components
DTC Troubleshooting (cont’d)
ABS MODULATOR-CONTROL UNIT 25P CONNECTOR
DTC 14-12 DTC 12-12 RR-GND (BLU)
RL-GND (PUR)
FR-GND (PNK) RR-GND (BLU)
RL-GND (PUR)
FR-GND (PNK)
FR-GND (PNK) RL-GND (PUR)
FL-GND (RED)
RR-GND (BLU)
RR-GND (BLU)
FL-GND (RED)
DTC 18-12 DTC 16-12 FL-GND (RED)
FL-GND (RED)
RL-GND (PUR)
FR-GND (PNK)
7. Check for continuity between the appropriate ABS modulator-control unit 25P connector wheel speed
sensor GND terminals (see table).
12-12 No. 18
14-12 No. 3
16-12 No. 15
18-12 No. 5 Repair short in the wires between the
appropriate wheel speed sensor and the ABS
modulator-control unit.
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.
No. 3 No. 15 No. 5
No. 18 No. 15 No. 5
No. 18 No. 3 No. 5
No.18No.3No.15
Wire side of female terminals
Is there continuity?
08/08/21 15:03:14 61SNR030_190_0070
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DTC 12-21:
DTC 14-21:
DTC 16-21:
DTC 18-21: DTC 12-22:
DTC 14-22:
DTC 16-22:
DTC 18-22:
YES
NO
DTC Appropriate Wheel Speed Sensor
YES
NO YES
NO
DTC Appropriate Wheel Speed Sensor
YES
NO
19-7119-71
Right-front Wheel Speed Sensor
Installation Error
Left-front Wheel Speed Sensor
Installation Error
Right-rear Wheel Speed Sensor
Installation Error
Left-rear Wheel Speed Sensor
Installation Error Right-front Wheel Speed Sensor
Installation Error (30 km/h (19 mph) or More)
Left-front Wheel Speed Sensor
Installation Error (30 km/h (19 mph) or More)
Right-rear Wheel Speed Sensor
Installation Error (30 km/h (19 mph) or More)
Left-rear Wheel Speed Sensor
Installation Error (30 km/h (19 mph) or More)
1. Test-drive the vehicle at 10 km/h (7 mph).
NOTE: Drive the vehicle on the road, not on a lift.
2. Check the RF, LF, RR, LR WHEEL SPEED in the ABS DATA LIST with the HDS.
Intermittent failure, the system is OK at this
time. Check for loose terminals between the wheel
speed sensor 2P connector and the ABS modulator-
control unit 25P connector. Refer to intermittent
failures troubleshooting (see page 19-50).
Go to step 3.
3. Turn the ignition switch to LOCK (0).
4. Check that the appropriate wheel speed sensor is properly mounted (see page 19-92).
12-21 Right-front
14-21 Left-front
16-21 Right-rear
18-21 Left-rear
Replace the appropriate wheel speed sensor
(see page 19-92).
Reinstall the wheel speed sensor, and check
the mounting position (see page 19-92). 1. Test-drive the vehicle between 30 km/h (19 mph)
and 50 km/h (31 mph) for 70 seconds or more.
NOTE: Drive the vehicle on the road, not on a lift.
2. Check the RF, LF, RR, LR WHEEL SPEED in the ABS DATA LIST with the HDS.
Intermittent failure, the system is OK at this
time. Check for loose terminals between the wheel
speed sensor 2P connector and the ABS modulator-
control unit 25P connector. Refer to intermittent
failures troubleshooting (see page 19-50).
Go to step 3.
3. Turn the ignition switch to LOCK (0).
4. Check that the appropriate wheel speed sensor is properly mounted (see page 19-92).
12-22 Right-front
14-22 Left-front
16-22 Right-rear
18-22 Left-rear
Replace the appropriate wheel speed sensor
(see page 19-92).
Reinstall the wheel speed sensor, and check
the mounting position (see page 19-92).
Are all f our values the same?
Is t he w heel speed sensor i nst al l at i on OK ? Are all f our values the same?
Is t he w heel speed sensor i nst al l at i on OK ?
08/08/21 15:03:14 61SNR030_190_0071
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