ROAD SIGN ASSIST SYSTEM PRECAUTION

IGNITION SWITCH EXPRESSION

1. The type of ignition switch used on this model differs depending on the specifications of the vehicle. The expressions listed in the table below are used in this section.

   Expression	Ignition Switch (Position)	Engine Switch (Condition)
   Ignition Switch off	LOCK	Off (Lock)
   Ignition Switch ACC	ACC	On (ACC)
   Ignition Switch ON	ON	On (IG)
   Engine Start	START	On (Start)

HANDLING PRECAUTION FOR ROAD SIGN ASSIST SYSTEM

1. Under the following conditions, signs may not be displayed or the system may not operate.

   
   

   • Misalignment has occurred in the installation of the pre-crash safety city sensor

   • Mud, snow, ice, a sticker, etc. is stuck to the windshield in the pre-crash safety city sensor's field of view

   • During poor weather, such as heavy rain, heavy snow or dense fog

   • A bright light source is shining in front of the pre-crash safety city sensor

   • The sign is dirty, faded, angled, bent or has poor contrast (if electronic)

   • A part of the sign is concealed

   • After the pre-crash safety city sensor acquires the sign, the vehicle passes by too quickly

   • The driving scene is misjudged

2. Under the following conditions, the incorrect sign may be displayed or the system may not operate properly.

   
   

   • Speed limit signs on side roads may be detected and displayed (if positioned in the detection range of the front sensor) while traveling on a main road

   • Speed limit signs on roundabout exit roads may be detected and displayed (if positioned in the detection range of the front sensor) while traveling on a roundabout

   • The speed information displayed on the meter may differ from the speed information displayed on the navigation system (if equipped) due to the navigation system using map data

   • A sticker applied to the rear of the preceding vehicle is recognized as a sign

   • A shape resembling a supported sign is recognized

   • Immediately after moving over to a state or country with different speed limit units or driving directions

   • The driving scene is misjudged

PRECAUTION FOR TROUBLESHOOTING

1. If the malfunction is due to connectors being loosely connected, or improper installation of parts, reconnecting the connectors or removing and reinstalling the parts may temporarily or completely correct the problem.

2. The road sign assist system may be affected by malfunctions in other systems. Check for DTCs in other systems and, if present, troubleshoot those DTCs first.

PRECAUTION FOR REPLACING PRE-CRASH SAFETY CITY SENSOR

1. When replacing the pre-crash safety city sensor with a new one, it is necessary to perform "Recognition Camera/Target Position Memory" and "Beam Axis Learning".

   Perform adjustment with either "ONE TIME RECOGNITION" or "SEQUENTIAL RECOGNITION".

   
   

   • ONE TIME RECOGNITION: Click here

   • SEQUENTIAL RECOGNITION: Click here

   If the system is operated when "Recognition Camera/Target Position Memory" and "Beam Axis Learning" have not been performed, C1AA9 is output Click here

2. When replacing the pre-crash safety city sensor, replace it with a new one. If an ECU which was installed to another vehicle is used, the information stored in the pre-crash safety city sensor will not match the information from the vehicle and, as a result, a DTC may be output.

3. When replacing or removing and installing the pre-crash safety city sensor, do not damage the camera lens or allow it to become contaminated with foreign matter.

4. Do not reuse a pre-crash safety city sensor that has been dropped or subjected to a strong impact.

PRECAUTION FOR REPLACING WINDSHIELD GLASS