Winter driving tips
Carry out the necessary preparations and inspections before driving the vehicle in winter. Always drive the vehicle in a manner appropriate to the prevailing weather conditions.
Preparation for winter
Ensure that all tires are the same size and brand, and that chains match the size of the tires.
*: Tire chains cannot be mounted on 18-inch tires.
Before driving the vehicle
Perform the following according to the driving conditions:
Pour warm water over the frozen area to melt the ice. Wipe away the water immediately to prevent it from freezing.
When driving the vehicle
Accelerate the vehicle slowly, keep a safe distance between you and the vehicle ahead, and drive at a reduced speed suitable to road conditions
When parking the vehicle
Failure to do so may be dangerous because it may cause the vehicle to move unexpectedly, possibly leading to an accident.
*: The shift lever will be locked if it is attempted to be shifted from P to any other position without depressing the brake pedal. If the shift lever can be shifted from P, there may be a problem with the shift lock system. Have the vehicle inspected by your Toyota dealer immediately.
Selecting tire chains
17-inch tires
Use the correct tire chain size when mounting the tire chains.
Chain size is regulated for each tire size.
Side chain:
Cross chain:
18-inch tires
Tire chains cannot be mounted as the space between the tire and body is too narrow.
Snow tires should be used instead.

Regulations on the use of tire chains
Regulations regarding the use of tire chains vary depending on location and type of road. Always check local regulations before installing chains.
■Tire chain installation Observe the following precautions when installing and removing chains:
■Driving with snow tires Observe the following precautions to reduce the risk of accidents.
Failure to do so may result in a loss of vehicle control and cause death or serious injury.
■Driving with tire chains Observe the following precautions to reduce the risk of accidents.
Failure to do so may result in the vehicle being unable to be driven safely, and may cause death or serious injury.
■Repairing or replacing snow tires Request repairs or replacement of snow tires from Toyota dealers or legitimate tire retailers.
This is because the removal and attachment of snow tires affects the operation of the tire pressure warning valves and transmitters.
■Fitting tire chains The tire pressure warning valves and transmitters may not function correctly when tire chains are fitted
Driving assist systemsToyota CH-R Service Manual > Wireless Door Lock Control System(w/o Smart Key System): System Diagram
SYSTEM DIAGRAM
Communication Table
Sender
Receiver
Signal
Line
Main Body ECU
(Multiplex Network Body ECU)
Combination Meter Assembly
Wireless door lock hazard warning light request signal
CAN
...
Toyota CH-R Service Manual > Smart Key System(for Start Function): Power Source Mode does not Change to ON (IG)
DESCRIPTION
If the engine switch is pressed with the electrical key transmitter sub-assembly
in the cabin, the certification ECU (smart key ECU assembly) receives a signal and
changes the power source mode.
Related Data List and Active Test Items
Problem Symptom
Data Lis ...