CRUISE CONTROL CRUISE CONTROL SYSTEM SYSTEM DESCRIPTION
CRUISE CONTROL SYSTEM (for 2AR-FE, 3ZR-FAE, 3ZR-FE)
This system is controlled by the ECM. Control is performed using the throttle position sensor and motor. The ECM controls the following functions: ON-OFF, -SET, +RES, CANCEL, vehicle speed operation and shift down control*.
*: for Automatic Transaxle
The ECM compares the vehicle speed from the speed sensor with the stored vehicle speed set using the cruise control switch. The ECM instructs the throttle valve motor of the throttle with motor body assembly to close the valve when the vehicle speed is greater than the stored speed, and instructs it to open the valve when the vehicle speed is less than the stored speed.
The ECM receives signals such as ON-OFF, -SET, +RES, and CANCEL from the cruise control switch and executes the command.
The ECM illuminates the combination meter assembly cruise control indicator light when it receives the cruise control switch on signal.
for Dot Display Type:
The cruise control indicator in the combination meter assembly goes out and a warning message is displayed when a malfunction occurs during cruise control driving.
for Segment Display Type:
The cruise control indicator in the combination meter assembly changes to yellow when a malfunction occurs during cruise control driving.
The ECM illuminates the combination meter assembly cruise control SET indicator light when vehicle speed control begins after the cruise control switch is pushed to -SET while driving.
| *1 | Cruise Control Indicator Light |
| *2 | Cruise Control SET Indicator Light |
The ECM cancels the cruise control system when the brake pedal is depressed and the ECM receives the stop light switch signal.
w/ Shift Paddle Switch:
The ECM cancels cruise control when it detects that the transmission is changed from 4th gear to 3rd, 2nd or 1st gear with the shift paddle switch while the shift lever is in D or M.
for Automatic Transaxle:
The ECM cancels control of vehicle speed when the shift lever is moved from D or S to any other position.
The ECM cancels control of vehicle speed when the shift lever is used to select the 3rd, 2nd or 1st range with the shift lever in S.
for CVT:
The ECM cancels control of vehicle speed when the shift lever is moved from D or M to any other position.
The ECM cancels control of vehicle speed when the shift lever is used to select the 3rd, 2nd or 1st range with the shift lever in M.
for Manual Transaxle:
The ECM cancels the cruise control system when the clutch pedal is depressed and the ECM receives the clutch switch assembly.
The ECM cancels control of vehicle speed when the cruise control switch is pulled to CANCEL.
The ECM cancels control of vehicle speed when the cruise control system is turned off using the cruise control switch.
CRUISE CONTROL SYSTEM (for 1AD-FTV, 2AD-FHV, 2AD-CCo, 2AD-DPF)
This system controls the vehicle speed by using the ECM to change the fuel injection quantity. The ECM controls the following functions: ON-OFF, -SET, +RES, CANCEL, vehicle speed operation and fuel injection quantity control and shift down control*.
*: for Automatic Transaxle
The ECM compares the driving vehicle speed from the vehicle speed sensor with the stored vehicle speed set through the cruise control switch. The ECM increases the fuel injection quantity when the driving speed is less than the stored speed.
The ECM receives signals such as ON-OFF, -SET, +RES, and CANCEL from the cruise control switch and executes the command.
The ECM illuminates the combination meter assembly cruise control indicator light when it receives the cruise control switch on signal.
for Dot Display Type:
The cruise control indicator in the combination meter assembly goes out and a warning message is displayed when a malfunction occurs during cruise control driving.
for Segment Display Type:
The cruise control indicator in the combination meter assembly changes to yellow when a malfunction occurs during cruise control driving.
The ECM illuminates the combination meter assembly cruise control SET indicator light when vehicle speed control begins after the cruise control switch is pushed to -SET while driving.
| *1 | Cruise Control Indicator Light |
| *2 | Cruise Control SET Indicator Light |
The ECM cancels the cruise control system when the brake pedal is depressed and the ECM receives the stop light switch signal.
w/ Shift Paddle Switch:
The ECM cancels cruise control when it detects that the transmission is changed from 4th gear to 3rd, 2nd or 1st gear with the shift paddle switch while the shift lever is in D or M.
for Automatic Transaxle:
The ECM cancels control of vehicle speed when the shift lever is moved from D or S to any other position.
The ECM cancels control of vehicle speed when the shift lever is used to select the 3rd, 2nd or 1st range with the shift lever in S.
for Manual Transaxle:
The ECM cancels the cruise control system when the clutch pedal is depressed and the ECM receives the clutch switch assembly.
The ECM cancels control of vehicle speed when the cruise control switch is pulled to CANCEL.
The ECM cancels control of vehicle speed when the cruise control system is turned off using the cruise control switch.
LIMIT CONTROL
Low speed limit
The lowest possible set speed is approximately 40 km/h (25 mph). The cruise control system cannot be set when the vehicle speed is below the low speed limit. Control of vehicle speed will be automatically canceled but the stored vehicle speed will be retained when the vehicle speed drops below the low speed limit while the cruise control is controlling vehicle speed.
High speed limit
The highest possible set speed is approximately 200 km/h (125 mph). The cruise control system cannot be set when the vehicle speed is over the high speed limit. Also, +RES cannot be used to increase the speed beyond the high speed limit.
OPERATION OF CRUISE CONTROL
The cruise control switch is used to turn the cruise control system on and off, as well as operate 7 functions: SET, -(COAST), TAP-DOWN, RES (RESUME), ACCELERATION, TAP-UP, and CANCEL. The SET, TAP-DOWN, and COAST functions, and the RES (RESUME), TAP-UP, and ACCELERATION functions are operated with the same switch. The cruise control switch is an automatic return type switch which turns on only while operating it in the direction of each arrow, and turns off after it is released.
SET CONTROL
The vehicle speed is stored and speed control begins when the cruise control switch is pushed to -SET while driving with the cruise control system on (while the cruise control indicator light is illuminated), and the vehicle speed is within the set speed range (between the low and high speed limits).
- (COAST) CONTROL (for 1AD-FTV, 2AD-FHV, 2AD-CCo, 2AD-DPF)
When the cruise control switch is pushed to -SET and held in that position while the cruise control system is operating, the ECM sends a fuel injection quantity signal to the injector driver. Then, the vehicle speed is stored and maintained when the cruise control switch is released.
- (COAST) CONTROL (for 2AR-FE, 3ZR-FAE, 3ZR-FE)
When the cruise control system is controlling vehicle speed and the cruise control switch is pushed to -SET and held in that position, the cruise control system sends a "throttle valve opening angle 0°" demand signal to the ECM. Following this, the vehicle speed is stored and maintained when the cruise control switch is released.
- HINT:
-
An actual throttle valve opening angle of 0° is not possible due to items such as idle speed control.
TAP-DOWN CONTROL
When the cruise control system is controlling vehicle speed and the cruise control switch is tapped to the -SET side (for approximately 0.6 seconds or less), the stored vehicle speed decreases by approximately 1.6 km/h (1.0 mph) for each time the switch is tapped. When the cruise control switch is tapped to -SET and the difference between the current and stored vehicle speed is more than approximately 5 km/h (3 mph), the current vehicle speed is stored and speed control is performed.
ACCELERATION CONTROL (for 1AD-FTV, 2AD-FHV, 2AD-CCo, 2AD-DPF)
While the cruise control system is in operation, if the cruise control switch is pushed to +RES, the injector driver increases the fuel injection quantity. When the cruise control switch is released from +RES, the vehicle speed is stored and the vehicle is controlled in order to maintain a constant speed.
ACCELERATION CONTROL (for 2AR-FE, 3ZR-FAE, 3ZR-FE)
When the cruise control system is controlling vehicle speed and the cruise control switch is pushed to +RES and held in that position, the cruise control system sends a signal to the ECM to operate the throttle valve motor of the throttle with motor body assembly to open the throttle valve. Following this, the vehicle speed is stored and maintained when the cruise control switch is released.
TAP-UP CONTROL
When the cruise control system is controlling vehicle speed and the cruise control switch is tapped to the +RES side (for approximately 0.6 seconds or less), the stored vehicle speed increases by approximately 1.6 km/h (1.0 mph) for each time the switch is tapped. When the cruise control switch is tapped to +RES and the difference between the current and stored vehicle speed is more than approximately 5 km/h (3 mph), the stored vehicle speed will not be changed.
RESUME CONTROL
If cruise control system control of vehicle speed was canceled due to any of the manual cancel conditions (other than turning the cruise control system off using the cruise control switch), and if the vehicle speed is between the low and high speed limits, the stored vehicle speed from the time of cancellation will be resumed and maintained when the cruise control switch is pushed to +RES.
SHIFT DOWN CONTROL*
When the vehicle is cruising uphill, the transmission may shift down according to automatic transaxle control. After the ECM judges that uphill cruising has ended based on the throttle valve angle, the transmission will shift up. If the transmission shifts down during acceleration or resume control, it will shift up after acceleration or resume control is completed.
*: for Automatic Transaxle
CANCEL CONTROL
Manual cancel
Performing any of the following cancels the cruise control system (the stored vehicle speed in the ECM is maintained).
Depressing the brake pedal.
Turning the cruise control switch off (set speed is not stored in memory).
w/ Shift Paddle Switch:
The transmission is changed from 4th gear to 3rd, 2nd or 1st gear with the shift paddle switch while the shift lever is in D or M.
for U760E, U760F:
Moving the shift lever to any position except D or S (6th, 5th or 4th gear).
for U660F, K111, K111F:
Moving the shift lever to any position except D or M (6th, 5th or 4th gear).
for Manual Transaxle:
Depressing the clutch pedal.
Pulling the cruise control switch to CANCEL.
Auto cancel
Performing any of the following cancels the cruise control system (the stored vehicle speed in the ECM is not maintained).
Operating the VSC system.
AUTO CANCEL (FAIL-SAFE)
This system has an automatic cancellation function (fail-safe).
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