Mazda RX-8 Manual page 1700

CHECK TO SEE WHETHER MALFUNCTION (LACK
OF CONTINUITY) IS IN A/C AMPLIFIER OR WIRING
HARNESS (BETWEEN A/C AMPLIFIER AND AIR MIX
ACTUATOR)
Disconnect A/C amplifier connector (16-pin) and air
•
mix actuator connector.
Is there continuity between A/C amplifier connector
•
(16-pin) terminal 2O (potentiometer GND signal) and
air mix actuator connector terminal C?
CHECK TO SEE WHETHER MALFUNCTION
(SHORT TO B+) IS IN A/C AMPLIFIER OR WIRING
HARNESS (BETWEEN A/C AMPLIFIER AND AIR MIX
ACTUATOR)
9*
Turn the ignition switch to ON position.
•
Test voltage at A/C amplifier connector (16-pin) and
•
terminal 2O (potentiometer GND signal).
Is voltage approx. 12 V ?
•
CHECK TO SEE WHETHER MALFUNCTION (LACK
OF CONTINUITY) IS IN WIRING HARNESS
(BETWEEN A/C AMPLIFIER AND AIR MIX
ACTUATOR) OR ELSEWHERE
10*
Turn the ignition switch to ON position.
•
Test voltage at air mix actuator connector terminal A
•
(+5 V signal).
Is voltage approx. 5 V ?
•
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 LOCK position.
•
11*
Disconnect A/C amplifier connector (16-pin) and air
•
mix actuator connector.
Is there continuity between A/C amplifier connector
•
(16-pin) terminal 2H (potentiometer input signal) and
air mix actuator connector terminal E?
CHECK TO SEE WHETHER MALFUNCTION
12*
(SHORT TO GROUND) IS IN WIRING HARNESS
(BETWEEN A/C AMPLIFIER AND AIR MIX
Repair wiring harness between
No A/C amplifier and air mix
actuator, then go to Step 19.
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.
Repair wiring harness between
No A/C amplifier and air mix
actuator, then go to Step 19.
Yes Go to next step.
Repair wiring harness between
No A/C amplifier and air mix
actuator, then go to Step 19.
Repair wiring harness between
Yes A/C amplifier and air mix
actuator, then go to Step 19.
(w) RX-8 - HVAC
Page 71