Mazda 6 Training Manual page 270

Terminal Layout and Signal
Audio unit
T–54
AUDIO AND NAVIGATION SYSTEM
Terminal
1A Left front speaker (+)
1B B+ (Power back up)
1C Left front speaker (–)
1D Right front speaker (+)
1E Illumination (+)
1F Right front speaker (–)
1G Illumination (–)
1H
1I Vehicle speed signal
1J AMP. control
1K
1L TEL. mute
1M
1N Steering switch
1O
1P Steering switch
1Q
1R
1S Left rear speaker (+)
1T
1U Left rear speaker (–)
1V Right rear speaker (+)
1W Ground (power)
1X Right rear speaker (–)
2A Ground (power)
2B System mute
2C Right input (+)
2D Right input (–)
2E Left input (+)
2F Left input (–)
2G Signal ground
2H AUX control
2I AUX control
2J
2K
2L
2M
2N
2O
2P
Signal
—
UART-1
UART-2
CAN (+)
CAN (–)
ACC
Ground
—
Bus (–)
Bus (+)
—
—
ACC
B+