ACC System Auto Stop Control History
When the ACC is activated, if the millimeter wave radar determines that the ACC is unable to operate normally due to an environmental factors (such as weather or road surface condition and driving or vehicle condition) or other reasons even when the ACC system itself is normal, the millimeter wave radar automatically cancels the activation of the ACC and records the ACC system auto stop control code in it.

When the ACC is automatically cancelled, ''ACC OFF'' is displayed on the multi-information display (MID) to notify the driver of the cancellation. At this time, the ACC indicator (amber) does not come on.



Checking for ACC System Auto Stop Control Codes
The ACC system auto stop control codes recorded in the millimeter wave radar can be read out by the procedure below.

NOTE: Make sure the 12 volt battery is fully charged before you begin.

1.

2.
In the Driving Support of the HDS, select Integrated Driver Support System, then select Data List on the HDS.

3.
Checking for ACC system auto stop control codes recorded in the Data List.

NOTE:
ACC system auto stop control history is recorded from 1. When automatic cancellation takes place 11 times or more, the past 10 records are held. In this case, history 10 is the latest record and the 10 latest records are held. When 0, no record is held.
When DTCs are cleared with the HDS, the ACC system auto stop control history is cleared as well.
Some of the following ACC system auto stop control codes may not be used for specific model specifications.

ACC System Auto Stop Control Codes
Code
ACC System Auto Stops Operating
Examples
Detection Conditions
Restoration Conditions (Conditions under which ACC SET is possible)
Reasons for Control OFF
80
Engine Speed too high or too low
The vehicle decelerated because the leading vehicle decelerated, and the engine speed dropped below the mid-speed ranges.
The driver did not operate the clutch pedal within 10 seconds after the shift-down request was displayed.
The engine speed returned to the specified speed or higher.
Prevention of engine stall while the vehicle is decelerating because the leading vehicle is decelerating.
84
Target vehicle comes closer than the radar detecting limits
The leading vehicle slowed down rapidly.
Another vehicle suddenly cut in front of the own vehicle.
The distance between the leading vehicle and your vehicle is less than the minimum allowable vehicle-to-vehicle distance.
Models with the low speed follow (LSF) feature: 1.5 m (4.9 ft)
Models without the low speed follow (LSF) feature: 5 m (16 ft)
The system returns to normal when the distance between the leading vehicle and your vehicle reaches or exceeds the minimum allowable vehicle-to-vehicle distance + 0.5 m (1.6 ft).
The control is prohibited at a close distance to the leading vehicle where the ACC system is unavailable. If the leading vehicle is too close to your vehicle, the millimeter wave radar may fail to detect the leading vehicle.
89
Front wheel spin
Driving on a low ? road
TCS control is executed.
A change in the wheel speed equivalent to 0.75 G occurs.
Other than those listed to the left
Prevention of use of ACC on a road where vehicle behavior is unstable
99
Acceleration/deceleration abnormality
The inclination of the road changed significantly while the vehicle accelerates/decelerates at around the maximum acceleration/deceleration speed of the ACC system.
The powertrain or brake system is abnormal.
While the ACC was operating, an acceleration of 0.4 G or more* continued for 1.0 second or more.
While the ACC was operating, a deceleration of -0.5 G or less* continued for 1.5 seconds or more.
Other than those listed to the left
Because the maximum acceleration/deceleration speed for the ACC system is exceeded.
101
Rear wheel locked
The parking brake is not released or the vehicle is driven on a frozen road surface.
A signal of 5 mph (8 km/h) or more is inputted to the front wheel sensor and a signal of 0 mph (0 km/h) is inputted to the rear wheel sensor.
The front and rear wheel sensors detect a wheel speed.
Prevention of unstable vehicle behavior
109
Movement distance too short after initiation
When the millimeter wave radar detects an object that turns on low speed follow (LSF) control immediately after vehicle ON mode.
When the distance the vehicle travels after vehicle ON mode, which is calculated based on the vehicle speed, is less than 8 m (26 ft).
When the distance the vehicle travels is 8 m (26 ft) or more.
This is because an object other than a vehicle may be recognized as the leading vehicle after vehicle ON mode in a parking lot etc.
110
Shift position 1st
While driving in 1st gear.
Vehicle is driven at an extremely low speed.
1st gear shift position is detected.
Vehicle is driven in 2nd or higher gear (forward gear).
Inappropriate gear is selected for ACC system.
*: This value differs depending on whether or not the vehicle is equipped with Low Speed Follow (LSF).