Mazda CX-9 Grand Touring 2009 Manual page 1836

2008 BODY & ACCESSORIES Instrumentation/Driver Info - Mazda CX-9
Select the check
code 02. (The
Audio unit
diagnostic results
will be displayed
once each in the
order of audio unit
and heater control
unit.)
Climate control
unit
Check code 04
CHECK CODE INSPECTION CHART (CHECK CODE 04)
Check code 04
INSPECTION
STEP
CONDITION
2008 Mazda CX-9 Grand Touring
TNS relay ON/OFF signal
DISPLAY
Communication to audio
unit is normal.
Communication error to
audio unit. (DTC U0184)
(See DTC TABLE
[MULTIPLEX
COMMUNICATION
SYSTEM] )
Vehicle without audio unit.
Communication to climate
control unit is normal.
Communication error to
climate control unit. (DTC
U0164)
(See DTC TABLE
[MULTIPLEX
COMMUNICATION
SYSTEM] )
Vehicle without climate
control unit.
ACTION