Acura RL (1996-2004 year). Instruction — page 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

PHOTO 26

UNDER-
HOOD
RELAY
BOX C

PHOTO 23

FUSE 42

(TCS)
15A

G101

PHOTO 10

C405

PHOTO 74
VIEW 60

2

BLK/YEL

BLK/YEL

BLK/YEL

See Power
Distribution,
page 10-9.

BLK/YEL

BLK/YEL

2

3

)

(

*

5)

FUSE 20

ECU
20A

See Power
Distribution,
page 10-8.

UNDER-
DASH
FUSE/
RELAY
BOX

PHOTO 75

1

BLK/YEL

BLK/YEL

RED/BLK

1

3

OFF

ON

TCS
SWITCH
LIGHT

2

4

C502

PHOTO 77
VIEW 83

See Power
Distribution,
page 10-9.

See Dash and
Console Lights

TCS
SWITCH

VIEW 18

(G302 ’96-’98)

PHOTO 40

(G301 ’99)

PHOTO 31

See Ground
Distribution,
page 14-7.

C322

PHOTO 39

See Brake System
Indicator Light,
page 71 or 71-1.

BRAKE FLUID
LEVEL SWITCH
Closed with
low fluid level.

PHOTO 39

C321

PHOTO 39

PARKING
BRAKE SWITCH
Closed with
parking brake
applied.

PHOTO 81

BLK

BLK

GRN/RED

GRN/RED

GRN/RED

GRN/RED

)

(Canada GRN/WHT)

GRN/RED

B

2

B

10

C625

PHOTO 152
VIEW 85

4

GRN/RED

GRN/RED

BLU/RED

C306

PHOTO 36
VIEW 36

5

C629

PHOTO 152
VIEW 85

17

C410

PHOTO 79
VIEW 50

5

C329

PHOTO 73
VIEW 72

10

TCS
CONTROL
UNIT

PHOTO 151
VIEW 107

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

PHOTO 108
VIEW 93

18

BRN/BLK

See Ground
Distribution,
page 14-14
or 14-16.

G601

PHOTO 133

(G651 ‘97-‘99)

PHOTO 133

9

BLK

BRN/BLK

BRN/BLK

A

11

C629

PHOTO 152
VIEW 85

12

C504

PHOTO 83
VIEW 68

16

WHT/BLK

WHT/BLK

WHT/BLK

(TC-SW)

TCS switch input

1

BLK/YEL

(IG1)

Ignition input

See Dash and
Console Lights

RED

C414

PHOTO 83
VIEW 91

Parking brake input

(PARK)

Ground

(LG1)

(LG2)

(PMG)

BLK

C629

PHOTO 152
VIEW 85

6

*

= ‘98-‘99

HOT IN ON OR START

HOT AT ALL TIMES

2004 American Honda Motor Co., Inc.

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+

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

80

or

80-5

.

FUSE 39

STOP HORN
15A (‘96-‘98)
20A (‘99)

C301

PHOTO 36

5

See Gauge Assembly,
page 80 or 80-5.

WHT/RED

WHT/RED

See Gauge Assembly

A

22

A

7

C629

PHOTO 152
VIEW 85

11

C504

PHOTO 83
VIEW 68

15

TCS
INDICATOR
LIGHT

GAUGE
RELAY

PHOTO 27

1

2

BLU/GRY

BLU/GRY

BLU/GRY

BLU/GRY

A

2

GAUGE
ASSEMBLY

PHOTO 71
VIEW 113

UNDER-HOOD
FUSE/RELAY
BOX

PHOTO 33

FUSE 55

METER
15A

RED/YEL

C307

PHOTO 37
VIEW 47

1

Indicator control

TCS
CONTROL
UNIT

PHOTO 151
VIEW 107

20

BRN

1

19

GRN

2

BRN

7

GRN

6

BRN

2

GRN

3

BRN

2

GRN

1

18

BLK

C629

PHOTO 152
VIEW 85

3

BLK

C410

PHOTO 79
VIEW 50

1

BLK

C105

PHOTO 49
VIEW 23

1

BLK

B

M

TCS CONTROL
VALVE ACTUATOR

PHOTO 5

C414

PHOTO 83
VIEW 91

20

)

(

*

12)

15

WHT/YEL

3

C413

PHOTO 83
VIEW 73

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.

PHOTO 81

See Brake
Lights

See ABS,
Cruise Control,
PGM-FI, Wiper/Washer

9

C429

PHOTO 82
VIEW 62

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

PHOTO 23

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

PHOTO 5

GRY

WHT

WHT/BLU

BLU

4

2

5

1

*

= ‘98-‘99

WHT/YEL

HOT AT ALL TIMES

2004 American Honda Motor Co., Inc.

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35-2

Traction Control System (TCS) (’96-’99)

See
PGM-FI

Reference
voltage

(VCC2)

TP
sensor
input

(TPS)

21

YEL/BLU

6

D

8

C

BLU

6

E

PNK/BLU

10

C

BLK/ORN

12

B

5

14

1

GRN/BLK

3

2

YEL/BLU

RED/BLK

13

5

C101

PHOTO 48
VIEW 53

THROTTLE
POSITION
(TP)
SENSOR

PHOTO 12

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)

PHOTO 103
VIEW 82

See
PGM-FI

YEL/BLU

C102

PHOTO 48
VIEW 54

3

2

YEL/BLU

RED

8

4

C105

PHOTO 49
VIEW 23

TCS
CONTROL
VALVE
ANGLE
SENSOR

PHOTO 5

16

15

RED/BLK

RED

3

B

Service check
connector input

(SCS)

8

C444

PHOTO 108
VIEW 93

RED

YEL/BLU

RED/BLK

RED/BLK

See PGM-FI

D

22

GRN/BLK

POWERTRAIN
CONTROL
MODULE (PCM)

PHOTO 104
VIEW 115

(SG2)

Sensor
ground

GRN/BLK

1

GRN/BLK

RED/BLK

RED

RED

C448
(Terminals
7-10)

PHOTO 111
VIEW 80

2

1

SERVICE CHECK
CONNECTOR

PHOTO 100

C456
(Terminals
17-20)

PHOTO 103
VIEW 81

GRN/BLK

RED

YEL/BLU

C444

PHOTO 108
VIEW 93

See
PGM-FI

1

C103

PHOTO 48
VIEW 55

GRN/BLK

C114
(Terminals 8-14)

PHOTO 6
VIEW 57

GRN/BLK

GRN/BLK

2004 American Honda Motor Co., Inc.

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