Mazda RX-8 Workshop Manual page 3301

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2011 - RX-8 - Body and Accessories
NO.7 ALC FUNCTION IS INOPERATIVE [AUDIO]
7 ALC function is inoperative
Possible DTC —
POSSIBLE
CAUSE
NOTE:
Diagnostic procedure
STEP
1 Turn the ALC function to ON.
Inspect the ALC function operation when driving the
vehicle at ALC level 3.
Does the ALC system operate properly?
2 Inspect the connection of the audio unit connector (24-
pin, vehicle speed signal).
Inspect both the audio unit and wiring harness-side
connector terminal I (24-pin) for poor connection (such
as damaged/pulled-out pins, corrosion).
Are all the pins normal?
Open or short circuit in vehicle speed signal wiring harness (e. g.,
instrument cluster)
CAN signal wiring harness malfunction
Audio unit malfunction
Inspect the ALC function while driving the vehicle playing the CD, etc.
INSPECTION ACTION
YesThe system is normal.
Explains the ALC function
to the customer.
No Go to the next step.
YesGo to the appropriate DTC
inspection.
Repair or replace the pins
and/or the connector.
No Replace the audio unit.