CRUISE CONTROL SYSTEM OUTLINE


BHE012001011T01

• The cruise control system enables driving at a constant speed by setting vehicle speed with the cruise control switch instead of operating the AP.

• The PCM controls the throttle valve actuator to maintain the vehicle at a constant speed.

• For the control of the cruise control system, refer to the drive-by wire control. (See DRIVE-BY-WIRE CONTROL OPERATION.)

Component and function

Component

Function

Installation location

• DSC HU/CM (CAN communication: Vehicle speed signal)
The vehicle speed signal is sent to the PCM from either the DSC HU/CM.
Engine compartment
Cruise control
switch
ON/OFF
ON/OFF
This is the main switch of the cruise control system. Turning the ON/OFF switch to on switches the cruise control system to standby status.
Steering wheel
SET/COAST
SET
When the vehicle speed exceeds 27 km/h {16.7 mph} during normal driving (cruise control system is in standby status) and the SET/COAST switch is released after it is pressed, the PCM stores the vehicle speed at the time of the switch is released and the cruise control begins.
COAST
Tapping the SET/COAST switch (tap-down operation) or continuously pressing it during cruise control decreases the set vehicle speed.
RES/ACCEL
RES
If the RES/ACCEL switch is pressed while the cruise control is in standby status (PCM has stored a set vehicle speed) and the vehicle speed exceeds 27 km/h {16.7 mph} during normal driving, the cruise control system activates to control the vehicle speed to the set vehicle speed.
ACCEL
Tapping the RES/ACCEL switch (tap-up operation) or continuously pressing it during cruise control increases the set vehicle speed.
CANCEL
CANCEL
Pressing the CANCEL switch during cruise control switches the cruise control system to standby status (Set vehicle speed is saved).
Brake switch
Depressing the brake pedal during cruise control switches the cruise control system to standby status (Set vehicle speed is saved).
Brake pedal
CPP switch
Depressing the clutch pedal during cruise control switches the cruise control system to standby status (Set vehicle speed is saved).
Clutch pedal
Neutral switch
Shifting to neutral during cruise control switches the cruise control system to standby status (Set vehicle speed is saved).
Manual transmission
PCM
• The cruise control system activates or stops based on the cruise control switch ON/OFF signal.
• The cruise control duty signal, which is based on each input signal, is sent to the throttle valve actuator.
Engine compartment
Throttle valve actuator
The duty signal sent from the PCM adjusts the throttle valve opening angle.
Throttle body
Cruise control main indicator light
This illuminates while the cruise control system is in standby or control status.
Instrument cluster
Cruise control indicator light
This illuminates while the cruise control system is in control status.