Mazda RX-8 Workshop Manual page 2557

Does airflow mode change when operating
airflow mode selector switch?
3 CHECK TO SEE WHETHER PROBLEM IS IN AIR MIX
ACTUATOR +5 V SIGNAL OR POTENTIOMETER GND
SIGNAL
Is air mix actuator set at MAX HOT and
airflow mode actuator at VENT?
(Verify position of air mix actuator link and
airflow mode actuator link.)
4* CHECK TO SEE WHETHER MALFUNCTION (LACK OF
CONTINUITY) IS IN WIRING HARNESS (BETWEEN
A/C AMPLIFIER AND AIR MIX ACTUATOR) OR
ELSEWHERE
Turn the ignition switch to ON position.
Is there voltage of approx. 5 V at A/C
amplifier connector (16-pin) terminal 2P
(+5 V signal)?
5* CHECK TO SEE WHETHER MALFUNCTION IS IN AIR
MIX ACTUATOR (SHORT TO GROUND) OR
ELSEWHERE
Disconnect air mix actuator connector.
Is there voltage of approx. 5 V at A/C
amplifier connector (16-pin) terminal 2P
(+5 V signal)?
6* CHECK TO SEE WHETHER MALFUNCTION IS IN
AIRFLOW MODE ACTUATOR (SHORT TO GROUND)
OR ELSEWHERE
Disconnect airflow actuator connector.
Is there voltage of approx. 5 V at A/C
amplifier connector (16-pin) terminal 2P
(+5 V signal)?
7* CHECK TO SEE WHETHER MALFUNCTION (SHORT
TO GROUND) IS IN A/C AMPLIFIER OR WIRING
HARNESS (BETWEEN A/C AMPLIFIER AND AIR MIX
ACTUATOR)
Disconnect A/C amplifier connector (16-
pin).
No Go to next step.
YesGo to next step.
No Go to Step 8. (Set actuator at MAX
COLD and DEFROSTER.)
YesGo to Step 10.
No Go to next step.
YesInspect air mix actuator, then go to
Step 19. (See AIR MIX ACTUATOR
INSPECTION [MANUAL AIR
CONDITIONER].)
No Go to next step.
YesInspect airflow mode actuator, then go
to Step 19. (See
ACTUATOR INSPECTION [MANUAL AIR
CONDITIONER].)
No Go to next step.
YesRepair wiring harness between A/C
amplifier and air mix actuator, then go
to Step 19.
No Replace A/C amplifier, then go to Step
19.
AIRFLOW MODE