Mazda RX-8 Manual page 1695

NO.3 AIR INTAKE MODE DOES NOT CHANGE
3
DESCRIPTION
POSSIBLE CAUSE
When performing an asterisked (*) troubleshooting inspection, shake the wiring harness and connectors
•
while performing the inspection to discover whether poor contact points are the cause of any intermittent
malfunctions. If there is a problem, check to make sure connectors, terminals and wiring harnesses are
connected correctly and undamaged.
Diagnostic procedure
STEP INSPECTION
INSPECT TO SEE WHETHER MALFUNCTION
(LACK OF CONTINUITY) IS IN AIR INTAKE
ACTUATOR, WIRING HARNESS (BETWEEN A/C
AMPLIFIER AND AIR INTAKE ACTUATOR) OR
ELSEWHERE
Turn ignition switch to ON position.
•
Test voltages at the following terminals of A/C
•
amplifier:
1*
Terminal 1I (24-pin, FRESH motor drive
signal)
Terminal 1J (24-pin, RECIRCULATE motor
drive signal)
(See A/C AMPLIFIER INSPECTION )
Are voltages normal?
•
2* INSPECT TO SEE WHETHER MALFUNCTION
(LACK OF CONTINUITY) IS IN AIR INTAKE
Air intake mode does not change.
Air intake mode does not change when switching REC/FRESH mode.
•
Malfunction in air intake actuator (Steps 16)
•
Malfunction in air intake door (Step 7)
•
ACTION
Yes Go to next step.
No Go to Step 3.
Replace air intake actuator, then go
Yes
to Step 8.
(w) RX-8 - HVAC
Page 66