Mazda 2009 RX-8, Service Highlights

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CRUISE CONTROL SYSTEM [13B-MSP]
01-20–1
01-20
01-20 CRUISE CONTROL SYSTEM [13B-MSP]
CRUISE CONTROL SYSTEM
OUTLINE [13B-MSP] . . . . . . . . . . . . . . 01-20–1
Features . . . . . . . . . . . . . . . . . . . . . . . . 01-20–1
Outline . . . . . . . . . . . . . . . . . . . . . . . . . 01-20–1
Component and function . . . . . . . . . . . 01-20–1
CRUISE CONTROL SYSTEM
STRUCTURAL VIEW [13B-MSP]. . . . . . 01-20–2
CRUISE CONTROL SYSTEM
BLOCK DIAGRAM [13B-MSP] . . . . . . . 01-20–3
End of Toc
SOKYU_NG: CRUISE CONTROL SYSTEM
CRUISE CONTROL SYSTEM OUTLINE [13B-MSP]
id0120f2145200
Features
Outline
!
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.
Component and function
End Of Sie
Improved driveability
!
Cruise control switch changed
Component Function
Installation
location
!
ABS HU/CM (CAN
communication: Vehicle
speed signal)
!
DSC HU/CM (CAN
communication: Vehicle
speed signal)
The vehicle speed signal is sent to the PCM from either the ABS HU/CM or
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 (-) 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 (-) 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.
RES (+) RES (+)
If the RES (+) 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.
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 (MT)
Depressing the clutch pedal during cruise control switches the cruise control
system to standby status (Set vehicle speed is saved).
Clutch pedal
Neutral switch (MT)
Shifting to neutral during cruise control switches the cruise control system to
standby status (Set vehicle speed is saved). Manual
transmission
TCM (AT) (CAN
communication: Neutral signal)
Changing the selector lever from the D range to the N position during cruise
control switches the cruise control system to standby status (Set vehicle
speed is saved).
Automatic
transmission
PCM
!
The cruise control system activates or stops based on the cruise control
switch ON/OFF signal.
!
The throttle actuator is operated so that the vehicle speed is the pre-set
vehicle speed during cruise control system.
Engine
compartment
Throttle valve actuator The duty signal sent from the PCM adjusts the throttle valve opening angle. Throttle body
Cruise main indicator light This illuminates while the cruise control system is in standby or control status. Instrument
cluster
Cruise set indicator light This illuminates while the cruise control system is in control status.