Toyota does not recommend towing a trailer with your vehicle.
Toyota also does not recommend the installation of a tow hitch or the use of a tow hitch carrier for a wheelchair, scooter, bicycle, etc. Your vehicle is not designed for trailer towing or for the use of tow hitch mounted carriers.
Toyota CH-R Service Manual > Audio And Visual System(for Radio And Display Type): Speaker Output Short (B15C3)
DESCRIPTION
This DTC is stored when a malfunction occurs in the speakers.
DTC No.
Detection Item
DTC Detection Condition
Trouble Area
B15C3
Speaker Output Short
A short is detected in the speaker output circuit
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Toyota CH-R Service Manual > Revolution Sensor: Components
COMPONENTS
ILLUSTRATION
*1
AIR CLEANER CAP WITH AIR CLEANER HOSE
*2
AIR CLEANER CASE SUB-ASSEMBLY
*3
BATTERY CLAMP SUB-ASSEMBLY
*4
ECM
*5
NO. 1 AIR CLEANER INLET
* ...