CONTROL SYSTEM [13B-MSP]
01-40–11
01-40
2009 Mazda RX-8 Service Highlights (3452–1U–08C)
Cruise Control
x Calculates the throttle valve opening angle based on the deviation of the actual vehicle speed from the set
vehicle speed which was set with the cruise control switch and sends a duty signal to the throttle valve actuator.
x The PCM controls the actual vehicle speed so that it is close to the set vehicle speed.
x The cruise control includes the cruise control operation condition and the cruise control stop condition.
Cruise control operation condition
x When all of the following conditions are met, execution of the cruise control system is enabled (cruise control
standby status).
— Cruise control main switch: ON
— Vehi
cle speed: Exceeds 27 km/h {17 mph}
Cruise control stop condition
x When any of the following conditions are met even while in cruise control, the PCM stops the cruise control and
clears the set vehicle speed.
— Ignition switch: OFF
— Cruise control main switch: OFF
— Cruise control related DTCs (P0564, P0571) detected
x When any of the following conditions are met even while in cruise control, the PCM stops the cruise control
while storing the set vehicle speed.
— Cancel switch: ON
— Neutral switch (MT) or CPP switch (MT): ON
— Inhibitor switch (A
T) P/N position switch: ON
— Vehicle speed: Less than 22.5 km/h {14.0 mph}
— Brake switch: ON
— The actual vehicle speed is 15 km/h {9.3 mph} or more lower than the set vehicle speed during cruise
control (ascending).
— Condition where actual vehicle speed is 15 km/h {9.3 mph} or more lower than the set vehicle speed
continues for 60 s or more even when the RES (+) switch is on.
Cruise control function
x The cruise control includes accelerating, coasting, resume, tap-down, tap-up and downshift functions (AT).
STANDBY
ACCELERATION
TAP UP
DECELERATION
ON/OFF
RES/+
RESUME
SET
VEHICLE
SPEED
CLEAR
SET/-
CANCEL
VEHICLE
SPEED
㧚 km/h
{0 mph}
VEHICLE SPEED
SETTING
TAP DOWN
ACTUAL
VEHICLE SPEED
SET
VEHICLE SPEED
ON
OFF
ACC
RES
SET
COAST
CANCEL
STANDBY
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