Mazda RX-8 Manual page 1699

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.)
CHECK TO SEE WHETHER MALFUNCTION (LACK
OF CONTINUITY) IS IN WIRING HARNESS
(BETWEEN A/C AMPLIFIER AND AIR MIX
ACTUATOR) OR ELSEWHERE
4*
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)?
CHECK TO SEE WHETHER MALFUNCTION IS IN
AIR MIX ACTUATOR (SHORT TO GROUND) OR
ELSEWHERE
5*
Disconnect air mix actuator connector.
•
Is there voltage of approx. 5 V at A/C amplifier
•
connector (16-pin) terminal 2P (+5 V signal)?
CHECK TO SEE WHETHER MALFUNCTION IS IN
AIRFLOW MODE ACTUATOR (SHORT TO GROUND)
OR ELSEWHERE
6*
Disconnect airflow actuator connector.
•
Is there voltage of approx. 5 V at A/C amplifier
•
connector (16-pin) terminal 2P (+5 V signal)?
CHECK TO SEE WHETHER MALFUNCTION
(SHORT TO GROUND) IS IN A/C AMPLIFIER OR
WIRING HARNESS (BETWEEN A/C AMPLIFIER AND
AIR MIX ACTUATOR)
7*
Disconnect A/C amplifier connector (16-pin).
•
Is there continuity between A/C amplifier connector
•
(16-pin) terminal 2P (+5 V signal)?
8*
Go to Step 8. (Set actuator at
No
MAX COLD and DEFROSTER.)
Repair wiring harness between
Yes A/C amplifier and air mix
actuator, then go to Step 19.
No Go to next step.
Inspect air mix actuator, then go
Yes
to Step 19.
No Go to next step.
Inspect airflow mode actuator,
Yes
then go to Step 19.
No Go to next step.
Repair wiring harness between
Yes A/C amplifier and air mix
actuator, then go to Step 19.
Replace A/C amplifier, then go to
No
Step 19.
Yes Go to next step.
(w) RX-8 - HVAC
Page 70