Toyota CH-R Service Manual: System Description

HINT:

• The vehicle may creep after the pre-collision brake function has operated, the driver should depress the brake pedal as necessary.
• If the accelerator pedal is being depressed strongly or the steering wheel is being turned, the system may determine that the driver is taking evasive action and possibly prevent the pre-collision brake function from operating.

• When passing a vehicle or pedestrian
• When changing lanes while overtaking a preceding vehicle
• When overtaking a preceding vehicle that is changing lanes
• When overtaking a preceding vehicle that is making a left/right turn
• When passing a vehicle in an oncoming lane that is stopped to make a right/left turn
• When driving on a road where relative location to vehicle ahead in an adjacent lane may change, such as on a winding road
• When a preceding vehicle suddenly decelerates
• If the front of the vehicle is raised or lowered, such as when the road surface is uneven or undulating
• When approaching objects on the roadside, such as guardrails, utility poles, trees, or walls
• When there is a vehicle, pedestrian, or object by the roadside at the entrance of a curve
• When driving on a narrow path surrounded by a structure, such as in a tunnel or on an iron bridge
• When there is a metal object (manhole cover, steel plate, etc.), steps, or a protrusion on the road surface or roadside
• When a crossing pedestrian approaches very close to the vehicle
• When passing through a place with a low structure above the road (low ceiling, traffic sign, etc.)
• When passing under an object (billboard, etc.) at the top of an uphill road
• When rapidly closing on an electric toll gate barrier, parking area barrier, or other barrier that opens and closes
• When using an automatic car wash
• When driving through or under objects that may contact the vehicle, such as thick grass, tree branches, or a banner
• When the vehicle is hit by water, snow, dust, etc. from a vehicle ahead
• When driving through steam or smoke
• When there are patterns or paint on the road or a wall that may be mistaken for a vehicle or pedestrian
• When driving near an object that reflects radio waves, such as a large truck or guardrail
• When driving near a TV tower, broadcasting station, electric power plant, or other location where strong radio waves or electrical noise may be present

• If an oncoming vehicle is approaching your vehicle
• If a vehicle ahead is a motorcycle or bicycle
• When approaching the side of a vehicle
• If a preceding vehicle has a small rear end, such as an unloaded truck
• If a preceding vehicle has a low rear end, such as a low bed trailer
• If a vehicle ahead is carrying a load which protrudes past its rear bumper
• If a vehicle ahead has extremely high ground clearance
• If a vehicle ahead is irregularly shaped, such as a tractor or side car
• If the sun or other light is shining directly on a vehicle ahead
• If a vehicle cuts in front of your vehicle or emerges from beside a vehicle
• If a vehicle ahead makes an abrupt maneuver (such as sudden swerving, acceleration or deceleration)
• When suddenly cutting behind a preceding vehicle
• When a vehicle ahead is not directly in front of your vehicle
• When driving in inclement weather such as heavy rain, fog, snow or a sandstorm
• When the vehicle is hit by water, snow, dust, etc. from a vehicle ahead
• When driving through steam or smoke
• When driving in a place where the surrounding brightness changes suddenly, such as at the entrance or exit of a tunnel
• When a very bright light, such as the sun or the headlights of oncoming traffic, shines directly into the forward recognition camera
• When the surrounding area is dim, such as at dawn or dusk, or while at night or in a tunnel
• After the engine has started the vehicle has not been driven for a certain amount of time
• While making a left/right turn and for a few seconds after making a left/right turn
• While driving on a curve and for a few seconds after driving on a curve
• If your vehicle is skidding
• If the front of the vehicle is raised or lowered, such as when the road surface is uneven or undulating
• If the wheels are misaligned
• If a wiper blade is blocking the forward recognition camera
• The vehicle is wobbling
• The vehicle is being driven at extremely high speeds
• When driving on a hill

• If the braking functions cannot operate to their full extent, such as when the brake parts are extremely cold, extremely hot, or wet
• If the vehicle is not properly maintained (brakes or tires are excessively worn, improper tire inflation pressure, etc.)
• When the vehicle is being driven on a gravel road or other slippery surface

• Pedestrians shorter than approximately 100 cm (3.2 ft.) or taller than approximately 200 cm (6.5 ft.)
• Pedestrians wearing oversized clothing (a rain coat, long skirt, etc.), making their silhouette obscure
• Pedestrians who are carrying large baggage, holding an umbrella, etc., hiding part of their body
• Pedestrians who are bending forward or squatting
• Pedestrians who are pushing a stroller, wheelchair, bicycle or other vehicle
• Groups of pedestrians which are close together
• Pedestrians who are wearing white and look extremely bright
• Pedestrians in the dark, such as at night or while in a tunnel
• Pedestrians whose clothing appears to be nearly the same color or brightness as their surroundings
• Pedestrians near walls, fences, guardrails, or large objects
• Pedestrians who are on a metal object (manhole cover, steel plate, etc.) on the road
• Pedestrians who are walking fast
• Pedestrians who are changing speed abruptly
• Pedestrians running out from behind a vehicle or a large object
• Pedestrians who are extremely close to the side of the vehicle (outside rear view mirror, etc.)

• When the millimeter wave radar sensor assembly or forward recognition camera or the area around either sensor is hot, such as in the sun
• When the millimeter wave radar sensor assembly or forward recognition camera or the area around either sensor is cold, such as in an extremely cold environment
• When the millimeter wave radar sensor assembly or front grille emblem is dirty or covered with snow, etc.
• If the forward recognition camera is obstructed, such as when the hood is open or a sticker is attached to the windshield near the forward recognition camera
• When the millimeter wave radar sensor assembly is performing beam axis alignment correction after detecting a misaligned beam axis.

How To Proceed With Troubleshooting

CAUTION / NOTICE / HINT HINT: Use these procedures to troubleshoot the pre-collision system. *: Use the Techstream. PROCEDURE 1. VEHICLE BROUGHT TO WORKSHO ...

Operation Check

OPERATION CHECK CHECK PRE-COLLISION SYSTEM SETTING (a) Turn the ignition switch to ON. (b) Operate the steering pad switch assembly to change the setting of PCS on the multi-information display t ...

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