Checking for ACC System Auto Stop Control Codes

The ACC system auto stop control codes recorded in the multipurpose camera unit can be read out by the procedure below.

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

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

*1: While the code is detected, the CMBS operation stops temporarily and the CMBS indicator (amber) comes on.

*2: This value differs depending on whether or not the vehicle is equipped with Low Speed Follow (LSF) feature, or on the vehicle speed.

Code	ACC System Auto Stops Operating	Concrete Examples	Detection Conditions	Restoration Conditions (Conditions under which ACC SET is possible)	Reasons for Control OFF
82	Adaptive cruise control (ACC) brake control temporarily prohibited by Electric Parking Brake	12 Volt battery deterioration 24 Volt battery installation	The multipurpose camera unit received ACC brake temporary prohibition information from the EPB. NOTE: When the EPB power supply voltage is outside the operating range, the EPB sends ACC brake temporary prohibition information to the multipurpose camera unit.	The EPB power supply voltage returns to normal and the ACC brake temporary prohibition information is cleared.	The EPB cannot maintain the vehicle stopping state.
83	Radar detection unstable	The vehicle followed a narrow vehicle, such as a motorcycle, or a specialized vehicle. The reception level of the millimeter wave radar decreased due to rain or snow.	The reception of the millimeter wave radar (average) is outside the range where ACC control is available.	The reception level of the millimeter wave radar (average) returned to within the range where ACC control is available and the leading vehicle was detected.	For preventing the vehicle from accelerating after the leading vehicle is lost because the detection state of the leading vehicle becomes unstable while the vehicle is following the leading vehicle.
84	Target vehicle comes closer than the radar detecting limits	The leading vehicle slowed down rapidly. Another vehicle (vehicle driving next to the own vehicle) suddenly cut in front of the own vehicle.	The distance between the leading vehicle and the own vehicle is less than the minimum allowable vehicle-to-vehicle distance. Models with the low speed follow (LSF) feature: 15 m (4.9 ft) Models without the low speed follow (LSF) feature: 5 m (15 ft)	The system returns to normal when the distance between the leading vehicle and own 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 the vehicle, the millimeter wave radar may fail to detect the leading vehicle.

*1: While the code is detected, the CMBS operation stops temporarily and the CMBS indicator (amber) comes on.

*2: This value differs depending on whether or not the vehicle is equipped with Low Speed Follow (LSF) feature, or on the vehicle speed.

Code	ACC System Auto Stops Operating	Concrete Examples	Detection Conditions	Restoration Conditions (Conditions under which ACC SET is possible)	Reasons for Control OFF
85	Extensive driving on a rough or winding road	The vehicle continued to run in an unstable state without stopping: Driving on a road with many curves or a rough road Repeated acceleration and deceleration Rapid acceleration/deceleration Continuous, unstable, or rapid steering wheel operation	The yaw rate-acceleration neutral position was not corrected when the yaw rate sensor temperature changed by 50°F (10°C).	Stop the vehicle or drive the vehicle in a stable state at 3 mph (5 km/h) or more. NOTE: While the vehicle is running, the correction is made based on the correction value when the vehicle is stopped, so the correct will not be made once the ACC system auto stop control code 85 is stored.	Because the accuracy of the yaw rate sensor cannot be maintained, possibly resulting in an incorrect estimated vehicle trajectory or incorrect leading vehicle selection.
86	Abnormal tire pressure	Low tire pressure (including a flat tire) Driving on a split road (the right and left wheels run on different types of road surfaces)	The estimated yaw rate calculated based on the difference between the right and left wheel speeds differs between the front and rear wheels (estimated yaw rate difference: 2 deg/s or more).	Estimated yaw rate difference: 0.25 deg/s or less	Because the estimated running trajectory of the vehicle is incorrect, so the leading vehicle cannot be selected correctly. NOTE: If the tire pressure is abnormal, the yaw rate-acceleration neutral position is not corrected normally.

*1: While the code is detected, the CMBS operation stops temporarily and the CMBS indicator (amber) comes on.

*2: This value differs depending on whether or not the vehicle is equipped with Low Speed Follow (LSF) feature, or on the vehicle speed.

Code	ACC System Auto Stops Operating	Concrete Examples	Detection Conditions	Restoration Conditions (Conditions under which ACC SET is possible)	Reasons for Control OFF
87	Adaptive cruise control (ACC) brake control temporality prohibited by VSA	12 Volt battery deterioration 24 Volt battery installation	The multipurpose camera unit received ACC brake temporary prohibition information from the VSA modulator-control unit. NOTE: When the VSA modulator-control unit power supply voltage or the brake light relay actuation circuit voltage is outside the operating range, the VSA modulator-control unit sends ACC brake temporary prohibition information to the multipurpose camera unit.	The VSA modulator-control unit power supply voltage returns to normal and the ACC brake temporary prohibition information is cleared.	Because the ACC brake may not be activated or the brake light may not come on even when the ACC brake is activated.
88 *1	Radar temporary problem (temperature, voltage, etc)	Traffic congestion at a high temperature Continuous hill climbing 12 Volt battery deterioration	The multipurpose camera unit received the following error information from the millimeter wave radar. Temperature in the millimeter wave radar: 203°F (95°C) or more Millimeter wave radar power supply voltage: 9 V or less The millimeter wave radar cannot temporarily receive signals from the multipurpose camera unit.	The millimeter wave radar sends restoration information, which is received and cleared by the multipurpose camera unit.	The millimeter wave radar cannot normally detect the leading vehicle and measure the vehicle-to-vehicle distance. Prevention of incorrect detection of the leading vehicle or incorrect ACC control.
89	Front wheel spin	Driving on a low μ 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
91	Vehicle skidded, spun out, or abrupt steering wheel movements	Spin on a low μ road due to improper steering wheel operation Rapid steering wheel operation VSA control was executed.	Lateral acceleration of 0.60 G or more occurred within 1 second after the yaw rate changed by 2 deg/s or more in 0.1 second.	Other than those listed to the left	Prevention of use of ACC on a road where vehicle behavior is unstable

*1: While the code is detected, the CMBS operation stops temporarily and the CMBS indicator (amber) comes on.

*2: This value differs depending on whether or not the vehicle is equipped with Low Speed Follow (LSF) feature, or on the vehicle speed.

Code	ACC System Auto Stops Operating	Concrete Examples	Detection Conditions	Restoration Conditions (Conditions under which ACC SET is possible)	Reasons for Control OFF
93	Front tire problem	Flat tire Large air pressure difference One wheel slips	The estimated yaw rate calculated based on the wheel speed difference between the right and left wheels is 60 deg/s or more.	Stop the vehicle.	Because the estimated running trajectory of the own vehicle is incorrect, and the leading vehicle cannot be selected correctly. NOTE: When there is a problem with a tire, the yaw rate-acceleration neutral position is not corrected normally.
94	Rear tire problem	Flat tire Large air pressure difference One wheel slips	The estimated yaw rate calculated based on the wheel speed difference between the right and left wheels is 60 deg/s or more.	Stop the vehicle.	Because the estimated running trajectory of the own vehicle is incorrect, and the leading vehicle cannot be selected correctly. NOTE: When there is a problem with a tire, the yaw rate-acceleration neutral position is not corrected normally.
95 *1	Power supply voltage too high	24 Volt battery installation	Power supply voltage: 16.8 V or more	Power supply voltage: 16.5 V or less	The multipurpose camera unit may not operate properly.
96 *1	Power supply voltage too low	12 Volt battery deterioration	Power supply voltage: 9.5 V or less	Power supply voltage: 9.8 V or more	The multipurpose camera unit may not operate properly.

*1: While the code is detected, the CMBS operation stops temporarily and the CMBS indicator (amber) comes on.

*2: This value differs depending on whether or not the vehicle is equipped with Low Speed Follow (LSF) feature, or on the vehicle speed.

Code	ACC System Auto Stops Operating	Concrete Examples	Detection Conditions	Restoration Conditions (Conditions under which ACC SET is possible)	Reasons for Control OFF
97 *1	Extensive driving on a rough or winding road. (CMBS/FCW)	The vehicle continued to run in an unstable state without stopping: Driving on a road with many curves or a rough road Repeated acceleration and deceleration Rapid acceleration/deceleration Continuous, unstable, or rapid steering wheel operation	When the yaw rate sensor temperature changed by 86°F (30°C) or more and the correction logic is not executed for approximately 8 seconds or more	Stop the vehicle. NOTE: While the vehicle is running, the correction is made based on the correction value when the vehicle is stopped, so the correct will not be made once the ACC system auto stop control code 97 is stored. Yaw rate-acceleration neutral position memorization execution conditions: Stop the vehicle or drive the vehicle stably at a 6 mph (10 km/h) or more.	Because the system may be activated for an obstacle against which the vehicle is unlikely to collide.
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* 2 continued for 1.0 second or more. While the ACC was operating, a deceleration of -0.5 G or less* 2 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.

Code

ACC System Auto Stops Operating

Concrete Examples

Detection Conditions

Restoration Conditions (Conditions under which ACC SET is possible)

Reasons for Control OFF

97 *1

Extensive driving on a rough or winding road. (CMBS/FCW)

The vehicle continued to run in an unstable state without stopping:

Driving on a road with many curves or a rough road
Repeated acceleration and deceleration
Rapid acceleration/deceleration
Continuous, unstable, or rapid steering wheel operation

When the yaw rate sensor temperature changed by 86°F (30°C) or more and the correction logic is not executed for approximately 8 seconds or more

Stop the vehicle.

NOTE: While the vehicle is running, the correction is made based on the correction value when the vehicle is stopped, so the correct will not be made once the ACC system auto stop control code 97 is stored.

Yaw rate-acceleration neutral position memorization execution conditions:

Stop the vehicle or drive the vehicle stably at a 6 mph (10 km/h) or more.

Because the system may be activated for an obstacle against which the vehicle is unlikely to collide.

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* 2 continued for 1.0 second or more.
While the ACC was operating, a deceleration of -0.5 G or less* 2 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.

*1: While the code is detected, the CMBS operation stops temporarily and the CMBS indicator (amber) comes on.

*2: This value differs depending on whether or not the vehicle is equipped with Low Speed Follow (LSF) feature, or on the vehicle speed.

Code	ACC System Auto Stops Operating	Concrete Examples	Detection Conditions	Restoration Conditions (Conditions under which ACC SET is possible)	Reasons for Control OFF
101	Rear wheel locked	The parking brake is not released or the vehicle runs on a frozen road surface.	A signal of 5 mph (8 km/h) or more is input to the front wheel sensor and a signal of 0 mph (0 km/h) is input to the rear wheel sensor.	The front and rear wheel sensors detect a wheel speed.	Prevention of unstable vehicle behavior
108	Adaptive cruise control (ACC) brake control temporarily prohibited by ESB	12 Volt battery deterioration 24 Volt battery installation	The multipurpose camera unit received ACC brake temporary prohibition information from the ESB. NOTE: When the ESB power supply voltage is outside the operating range, the ESB sends ACC brake temporary prohibition information to the multipurpose camera unit. CAN communication fail is being detected between the ESB control unit and multipurpose camera unit.	The ESB power supply voltage returns to normal and the ACC brake temporary prohibition information is cleared.	Because ACC brake cannot be activated.

Code

ACC System Auto Stops Operating

Concrete Examples

Detection Conditions

Restoration Conditions (Conditions under which ACC SET is possible)

Reasons for Control OFF

101

Rear wheel locked

The parking brake is not released or the vehicle runs on a frozen road surface.

A signal of 5 mph (8 km/h) or more is input to the front wheel sensor and a signal of 0 mph (0 km/h) is input to the rear wheel sensor.

The front and rear wheel sensors detect a wheel speed.

Prevention of unstable vehicle behavior

108

Adaptive cruise control (ACC) brake control temporarily prohibited by ESB

12 Volt battery deterioration
24 Volt battery installation

The multipurpose camera unit received ACC brake temporary prohibition information from the ESB.

NOTE:

When the ESB power supply voltage is outside the operating range, the ESB sends ACC brake temporary prohibition information to the multipurpose camera unit.
CAN communication fail is being detected between the ESB control unit and multipurpose camera unit.

The ESB power supply voltage returns to normal and the ACC brake temporary prohibition information is cleared.

Because ACC brake cannot be activated.

*1: While the code is detected, the CMBS operation stops temporarily and the CMBS indicator (amber) comes on.

*2: This value differs depending on whether or not the vehicle is equipped with Low Speed Follow (LSF) feature, or on the vehicle speed.