Honda Odyssey 2004. Manual — part 321
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*02
ABS/TCS Control Unit Inputs and Outputs for Connector A (26P) (cont’d)
Terminal
number
Terminal
Wire color
Terminal sign
(Terminal name)
Description
Measurement
Conditions
(Ignition switch ON (II))
Voltage
19-90
ABS/TCS Components
System Description (cont’d)
ABS/TCS CONTROL UNIT CONNECTOR A (26P)
15
GRY
NCR
(Normally closed right)
Drives right TCS normally
closed solenoid valve
15
GND
TCS indicator
OFF
Battery
Voltage
16
LT/BLU
NOR
(Normally opened
right)
Drives right TCS normally
open solenoid valve
16
GND
ON
(Disconnect
16P connector
to turn
indicator on)
Below 0.3 V
18
RED/WHT
TCS1
Drives TCS indicator
(Turns the indicator drive
transistor to ON, then
turns off the indicator)
18
GND
TCS indicator
OFF
Battery
Voltage
ON
About 2 V
20
GRN
MCK
(Motor check)
Detects pump motor
drive signal
20
GND
Pump motor
ON
Battery
Voltage
OFF
Below 0.3 V
Remove MCK fuse
About 10 V
21
LT BLU
RLW (
)
(Rear-left wheel
positive)
Detects left-rear wheel
sensor signal
21
22
Wheel
Turn wheel at
1 turn/second
AC:
0. 053 V or
above
(Reference)
0.15 Vp-p or
above
22
GRY
RLW (
)
(Rear-left wheel
positive)
23
GRN/YEL
RRW (
)
(Rear-right wheel
positive)
Detects right-rear wheel
sensor signal
23
24
24
BLU/YEL
RRW (
)
(Rear-right wheel
negative)
Stopped
0.25 V
1.15 V
25
YEL/GRN
FSR
(Fail-safe relay)
Drives ABS fail-safe relay
(ABS fail-safe relay is
turned OFF to shut off the
power source to the
solenoid and pump
motor relay when a
problem occurs.)
25
GND
ABS
(SCS circuit
must be open)
Warning
Below 0.3 V
Normal
About 11 V
26
LT BLU
DLC
(Data link connector)
Communicates with the
HDS
Oscilloscope:
Wire side of female terminals
03/07/29 09:56:06 61S0X050_190_0090
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02
ABS/TCS Control Unit Inputs and Outputs for Connector B (16P)
Terminal
number
Terminal
Wire color
Terminal sign
(Terminal name)
Description
Measurement
Conditions
(Ignition switch ON (II))
Voltage
19-91
ABS/TCS CONTROL UNIT CONNECTOR B (16P)
1
PNK/BLK
FPTDR
(Frame to powertrain
torque down request)
Outputs engine retard
request signal
1
GND
TCS
Not operating
About 2.5 V
(5 V, duty 50)
Operating
About 5 V
2
WHT/RED
VREF
(Voltage reference)
Reference voltage for the
sensors of the PGM-FI
system
2
GND
About 5 V
4
BLU/ORN
TCS SW
(TCS switch)
Detects TCS switch signal
4
GND
TCS
switch
ON
(TCS indicator is
OFF)
Battery
Voltage
OFF
(TCS indicator is
ON)
0 V
6
YEL/WHT
PARK
(Parking)
Detects parking brake
switch signal and drives
brake system indicator
6
GND
With
engine
running,
parking
brake
Pressed
Below 0.3 V
Released
Battery
Voltage
7
LT GRN
ATSFTP
(AT shift position)
Detects A/T shift position
signal
7
GND
Shift the transmission to P
position, then start the engine.
About 4 V
9
RED/BLK
THLOUT
(Throttle out)
Detects throttle position
sensor signal
9
GND
Throttle
valve
Fully closed
About 0.5 V
Fully opened
About 4.8 V
10
LT GRN/
RED
PFINH
(Powertrain to frame
inhibition)
Detects TCS operation
permission signal
10
GND
Permission (normal)
About 2.5 V
(5 V, duty 50)
Inhibition (the coolant
temperature is 0°C or below)
About 5 V
Failure (TCS and/or PCM has
failed)
About 0 V
11
BLU
NEP
(Engine speed pulse)
Detects engine speed
signal
11
GND
Engine idling
About 6 V
13
GRN/YEL
TCSR
(TCS relay)
Drives TCS relay (TCS
relay is turned OFF to
shut off the power source
to the TCS solenoid and
pump motor relay when a
problem occurs)
13
GND
TCS (SCS
circuit
must be
opened)
Warning
Below 0.3 V
Normal
About 11 V
15
YEL/RED
PMR
(Pump motor relay)
Drives pump motor relay
15
GND
ABS
indicator
OFF
Pump
motor
ON
Below 1.0 V
OFF
Battery
Voltage
ON
Below 0.3 V
16
RED/WHT
TCS2
Drives TCS indicator
(Turns the indicator drive
transistor to ON, then
turns off the indicator)
16
GND
TCS
indicator
OFF
Battery
Voltage
ON
About 2 V
(cont’d)
Wire side of female terminals
03/07/29 09:56:06 61S0X050_190_0091
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03
ABS/TCS Control Unit Inputs and Outputs for Connector C (12P)
Terminal
number
Terminal
Wire color
Terminal sign
(Terminal name)
Description
Measurement
Conditions
(Ignition switch ON (II))
Voltage
19-92
ABS/TCS Components
System Description (cont’d)
ABS/TCS CONTROL UNIT CONNECTOR C (12P)
2
BRN/YEL
BRN/BLK
LG
(Logic ground)
Ground for logic circuit
2
GND
Below 0.3 V
3
YEL/WHT
RR-OUT
(Rear-right outlet)
Drives right-rear outlet
solenoid valve
3
GND
ABS indicator
OFF
Battery
Voltage
4
YEL/BLU
FL-OUT
(Front-left outlet)
Drives left-front outlet
solenoid valve
4
GND
5
YEL/GRN
RL-OUT
(Rear-left outlet)
Drives left-rear outlet
solenoid valve
5
GND
ON
(Disconnect
16P connector
to turn
indicator on)
Below 0.3 V
6
YEL/BLK
FR-OUT
(Front-right outlet)
Drives right-front outlet
solenoid valve
6
GND
7
BLK
GND3
(Ground 3)
Ground
7
GND
Below 0.3 V
8
RED/WHT
RR-IN
(Rear-right inlet)
Drives right-rear inlet
solenoid valve
8
GND
ABS indicator
OFF
Battery
Voltage
9
RED/BLU
FL-IN
(Front-left inlet)
Drives left-front inlet
solenoid valve
9
GND
10
RED/GRN
RL-IN
(Rear-left inlet)
Drives left-rear inlet
solenoid valve
10
GND
ON
(Disconnect
16P connector
to turn
indicator on)
Below 0.3 V
11
RED/BLK
FR-IN
(Front-right inlet)
Drives right-front inlet
solenoid valve
11
GND
12
BLK
GND2
(Ground 2)
Ground
12
GND
Below 0.3 V
’99-01 models
Wire side of female terminals
03/07/29 09:56:07 61S0X050_190_0092
*01
Outline
19-93
ABS/TCS
TCS control
ABS control
• Improves maneuverability and stability when braking.
SOLENOID VALVE
CONTROL
WHEEL
SENSOR
SIGNAL
ABS/ TCS
CONTROL
UNIT
SOLENOID VALVE
CONTROL
WHEEL
SENSOR
SIGNAL
WHEEL
SENSOR
SIGNAL
WHEEL
SENSOR
RR
WHEEL
SENSOR
SIGNAL
WHEEL
SENSOR
RL
NO: Normally Open
NC: Normally Closed
MASTER CYLINDER
TCS NO
TCS NC
TCS NO
NO
NO
NC
PUMP
MOTOR
PUMP
P
M
P
DAMPING
CHAMBER
MODULATOR UNIT
RESERVOIR
NC
NC
WHEEL
SENSOR
FL
WHEEL
SENSOR
FR
NC
NO
NO
RESERVOIR
This system consists of the ABS/TCS control unit, the modulator unit, four wheel sensors, and the PCM. The system
integrates the ABS (Anti-lock Brake System) and the TCS (Traction Control System) and controls both systems using
the brakes.
(cont’d)
03/07/29 09:56:07 61S0X050_190_0093
• Improves accelerating ability from a standstill on slippery road surfaces.
• Improves traction when one drive wheel is on a slippery road surface.
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