Acura RL (1996-2004 year). Manual — part 52
+
–
34-5
Cruise Control
How the Circuit Works
The cruise control system uses mechanical and
electrical devices to maintain the car’s speed at a
setting selected by the driver.
System Description
The cruise control unit receives command signals
from the cruise control main switch and the cruise
control Set/Resume/Cancel switch. With the ignition
switch in ON (II) or START (III), voltage is provided
to the cruise control main switch through fuse 20.
When you push the switch to ON, power is provided
to the cruise control unit and the brake pedal
position switch.
The cruise control unit receives information about
operating conditions from the brake pedal position
switch, the vehicle speed sensor (VSS), and the A/T
gear position switch. The cruise control unit then
sends signals to the cruise control actuator which
regulates the throttle position to maintain the
selected speed. The control unit compares the
actual speed of the car to the selected speed, and
then opens or closes the throttle as necessary to
match the selected speed.
The brake pedal position switch releases the
system’s control of the throttle at the instant you
press on the brake pedal. The switch sends a signal
to the control unit by removing power from the
normally closed brake input (GRY wire), and
providing power at the normally open brake input
(GRN/WHT wire). The control unit responds by
allowing the throttle to close. The A/T gear position
switch sends a “disengage” signal to the control unit
that also allows the throttle to close if the shifter is
moved from the “D” position.
The cruise control system will set and automatically
maintain any speed above 25 mph (40 km/h). To set
it, make sure the main switch is on and the switch
indicator is on. Then, after reaching the desired
speed, press the SET switch. This sends a “set”
signal to the cruise control unit which, in turn,
controls the cruise control actuator to maintain the
set speed.
When you push the SET switch and the cruise
control system is on, the cruise control ON indicator
lights up.
You can cancel the cruise control system by pushing
the cancel switch or by turning the main switch off.
This removes power to the control unit and erases
the set speed from memory. If the system is
disengaged temporarily by the brake pedal position
switch, or A/T gear position switch, and the car’s
speed is still above 25 mph, press the RESUME
switch: the car will automatically return to the
previously set speed.
For gradual acceleration without pressing the
accelerator pedal, push the RESUME switch and
hold it there. This will send an “acceleration” signal
to the control unit. When you release the switch, the
system will be reprogrammed for the new speed. To
slow the car down, push the SET switch in and hold
it there. This sends a “deceleration” signal to the
control unit, causing the car to coast. When the
desired speed is reached, release the SET switch.
This reprograms the system for the new speed.
Refer to the Service Manual (Section 4, Engine
Electrical) for specific tests or troubleshooting
procedures.
2004 American Honda Motor Co., Inc.
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35
Traction Control System (TCS) (’96-’99)
See Power
Distribution,
page 10-8.
18
)
(
*
10)
‘97-‘99
See Ground
Distribution,
pages 14
and 14-1.
TCS
FAIL-
SAFE
RELAY
UNDER-
HOOD
RELAY
BOX C
(TCS)
15A
G101
C405
2
BLK/YEL
BLK/YEL
BLK/YEL
See Power
Distribution,
page 10-9.
BLK/YEL
BLK/YEL
2
3
)
(
*
5)
ECU
20A
See Power
Distribution,
page 10-8.
UNDER-
DASH
FUSE/
RELAY
BOX
1
BLK/YEL
BLK/YEL
RED/BLK
1
3
OFF
ON
TCS
SWITCH
LIGHT
2
4
C502
See Power
Distribution,
page 10-9.
TCS
SWITCH
(G302 ’96-’98)
(G301 ’99)
See Ground
Distribution,
page 14-7.
C322
See Brake System
Indicator Light,
page 71 or 71-1.
BRAKE FLUID
LEVEL SWITCH
Closed with
low fluid level.
C321
PARKING
BRAKE SWITCH
Closed with
parking brake
applied.
BLK
BLK
GRN/RED
GRN/RED
GRN/RED
GRN/RED
)
(Canada GRN/WHT)
GRN/RED
B
2
B
10
C625
4
GRN/RED
GRN/RED
BLU/RED
C306
5
C629
17
C410
5
C329
10
TCS
CONTROL
UNIT
6
5
9
1
(
*
3)
5
)
BLK/WHT
BRN/WHT
BLK/WHT
BRN/
WHT
BLK/WHT
BRN/WHT
BLK/WHT
BRN/WHT
(VPM)
Primary power
(FSR)
Relay control
BRN/BLK
BRN/BLK
4
A
14
BRN/BLK
15
C444
18
BRN/BLK
See Ground
Distribution,
page 14-14
or 14-16.
G601
(G651 ‘97-‘99)
9
BLK
BRN/BLK
BRN/BLK
A
11
C629
12
C504
16
WHT/BLK
WHT/BLK
WHT/BLK
(TC-SW)
TCS switch input
1
BLK/YEL
(IG1)
Ignition input
RED
C414
Parking brake input
(PARK)
Ground
(LG1)
(LG2)
(PMG)
BLK
C629
6
*
= ‘98-‘99
HOT IN ON OR START
HOT AT ALL TIMES
2004 American Honda Motor Co., Inc.
▲
▲
+
–
35-1
Traction Control System (TCS) (’96-’99)
See Power
Distribution,
page 10-18.
NOTE: The Gauge Relay is energized with the Ignition Switch in ON (II) or START (III), see Gauge Assembly,
page
STOP HORN
15A (‘96-‘98)
20A (‘99)
C301
5
See Gauge Assembly,
page 80 or 80-5.
WHT/RED
WHT/RED
See Gauge Assembly
A
22
A
7
C629
11
C504
15
TCS
INDICATOR
LIGHT
GAUGE
RELAY
1
2
BLU/GRY
BLU/GRY
BLU/GRY
BLU/GRY
A
2
GAUGE
ASSEMBLY
UNDER-HOOD
FUSE/RELAY
BOX
METER
15A
RED/YEL
C307
1
Indicator control
TCS
CONTROL
UNIT
20
BRN
1
19
GRN
2
BRN
7
GRN
6
BRN
2
GRN
3
BRN
2
GRN
1
18
BLK
C629
3
BLK
C410
1
BLK
C105
1
BLK
B
M
TCS CONTROL
VALVE ACTUATOR
C414
20
)
(
*
12)
15
WHT/YEL
3
C413
8
GRN/WHT
GRN/WHT
GRN/WHT
GRN/WHT
10
GRN/WHT
Ground
(STR-GND)
Angle B input
(STR-B)
Power supply
(STR-VCC)
(STOP)
Brake input
BLU/GRY
17
11
GRN/WHT
4
BRAKE PEDAL
POSITION SWITCH
Closed with
pedal pressed.
See ABS,
Cruise Control,
PGM-FI, Wiper/Washer
9
C429
14
GRY
22
)
(
*
14)
13
13
6
BRN/YEL
19
)
(
*
11)
16
16
1
WHT/BLU
21
)
(
*
13)
14
4
7
BLU
GRY
BRN/YEL
WHT/BLU
BLU
GRY
BRN/YEL
WHT/BLU
BLU
STEERING
ANGLE
SENSOR
(Optical
Sensor)
UNDER-
HOOD
RELAY
BOX C
B
BLK
BLK
Angle A input
(STR-A)
(WARN 2)
(WARN 1)
TCS control valve
actuator control
(MOT
+
)
(SH-MOT)
(MOT
−
)
Ground
A
BLK
YEL
GRY
C122
GRY
WHT
WHT/BLU
BLU
4
2
5
1
*
= ‘98-‘99
WHT/YEL
HOT AT ALL TIMES
2004 American Honda Motor Co., Inc.
35-2
Traction Control System (TCS) (’96-’99)
Reference
voltage
(VCC2)
TP
sensor
input
(TPS)
YEL/BLU
D
C
BLU
E
PNK/BLU
C
BLK/ORN
12
B
5
14
1
GRN/BLK
3
2
YEL/BLU
RED/BLK
13
5
C101
THROTTLE
POSITION
(TP)
SENSOR
14
6
A
Engine
speed
output
(NEP)
TCS shift
control
output
(TCSFT)
Traction
control fuel
cut input
(TCFC)
(NEP)
Engine speed
input
(AT-SHIFT)
A/T shift
position input
(TC-FC)
Traction control fuel
cut output signal
Throttle position
sensor input
(TPS)
TCS control valve
angle sensor input
(
TCV)
17
12
2
BLU
PNK/BLU
BLK/ORN
BLU
C464
(Terminals
7-10)
YEL/BLU
C102
3
2
YEL/BLU
RED
8
4
C105
TCS
CONTROL
VALVE
ANGLE
SENSOR
16
15
RED/BLK
RED
3
B
Service check
connector input
(SCS)
8
C444
RED
YEL/BLU
RED/BLK
RED/BLK
D
GRN/BLK
POWERTRAIN
CONTROL
MODULE (PCM)
(SG2)
Sensor
ground
GRN/BLK
1
GRN/BLK
RED/BLK
RED
RED
C448
(Terminals
7-10)
2
1
SERVICE CHECK
CONNECTOR
C456
(Terminals
17-20)
GRN/BLK
RED
YEL/BLU
C444
1
C103
GRN/BLK
C114
(Terminals 8-14)
GRN/BLK
GRN/BLK
2004 American Honda Motor Co., Inc.
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