Toyota CH-R Service Manual > Audio And Visual System(for Radio And Display Type): Poor Sound Quality in All Modes (Low Volume)
PROCEDURE
1.
CHECK AUDIO SETTINGS
(a) Set bass, mid-range and treble to the initial values and check that the sound
is normal.
OK:
The sound returns to normal.
HINT:
Sound quality adjustment measures vary according to the type of amplifier.
OK
...
Toyota CH-R Service Manual > Can Communication System: Check Bus 1 Line for Short to GND
DESCRIPTION
There may be a short circuit between one of the CAN bus lines and GND when there
is no resistance between terminal 23 (CA1H) of the central gateway ECU (network
gateway ECU) and terminal 4 (CG) of the DLC3, or terminal 8 (CA1L) of the central
gateway ECU (network gateway ECU) and ...