If any of the electrical components do not operate, a fuse may have blown. If this happens, check and replace the fuses as necessary.
1. Turn the engine switch off.
2. Open the fuse box cover.
Engine compartment type A fuse box
While pushing the 2 claws, lift up the cover.
When closing the cover, make sure to attach the 2 claws.

Engine compartment type B fuse box
While pushing the 3 claws, lift up the cover.
When closing the cover, make sure to attach the 3 claws.

Engine compartment type C fuse box
While pushing the 2 claws, lift up the cover.
When closing the cover, make sure to attach the 2 claws.

Left side instrument panel
Remove the lid.
Make sure to press the claw during removal or installation.

3. Remove the fuse with the pullout tool.
Only type A fuses can be removed using the pullout tool.

4. Check if the fuse is blown.
Except for type E: Replace the blown fuse with a new fuse of an appropriate amperage rating.
The amperage rating can be found on the fuse box lid.
Type E: Contact your Toyota dealer.

■After a fuse is replaced
■If there is an overload in a circuit The fuses are designed to blow, protecting the wiring harness from damage.
■When replacing light bulbs Toyota recommends that you use genuine Toyota products designed for this vehicle. Because certain bulbs are connected to circuits designed to prevent overload, non-genuine parts or parts not designed for this vehicle may be unusable.
■To prevent system breakdowns and vehicle fire Observe the following precautions.
Failure to do so may cause damage to the vehicle, and possibly a fire or injury.
Never replace a fuse with a wire, even as a temporary fix.
■Before replacing fuses Have the cause of electrical overload determined and repaired by your Toyota dealer as soon as possible.
Wireless remote control/electronic key battery
Light bulbsToyota CH-R Service Manual > Air Conditioning System(for Automatic Air Conditioning System With Top-mounted
Air Conditioner Pressure Sensor): Lost Communication with Front Panel LIN (B14B2)
DESCRIPTION
The air conditioning control assembly communicates with the air conditioning
amplifier assembly via LIN communication.
If the LIN communication system malfunctions, the air conditioning amplifier
assembly does not operate even if the air conditioning control assembly is operated.
...
Toyota CH-R Service Manual > Navigation System: Voice Recognition Microphone Disconnected (B1579)
DESCRIPTION
The radio and display receiver assembly and map light assembly (telephone microphone
assembly) are connected to each other using the microphone connection detection
signal lines.
This DTC is stored when a microphone connection detection signal line is disconnected.
DTC ...