SYSTEM DIAGRAM

Precaution
How To Proceed With TroubleshootingToyota CH-R Service Manual > Lighting System: Left Headlight ECU Variation Error (B2456)
DESCRIPTION
This DTC is output when a headlight ECU sub-assembly LH that is incompatible
with the vehicle is installed.
The headlight ECU sub-assembly LH outputs DTC B2456.
DTC No.
Detection Item
DTC Detection Condition
Trouble Area
Note
...
Toyota CH-R Service Manual > Can Communication System: Check Bus 5 Line for Short to +B
DESCRIPTION
There may be a short circuit between one of the CAN bus lines and +B when no
resistance exists between terminal 15 (CA5H) of the central gateway ECU (network
gateway ECU) and terminal 16 (BAT) of the DLC3, or terminal 16 (CA5L) of the central
gateway ECU (network gateway ECU) and ...