Mazda RX-8 Workshop Manual page 2469

< Previous Next >
2011 - RX-8 - HVAC
DTC 18
DTC 18 Air mix actuator (potentiometer) system inspection
POSSIBLE
CAUSE
Diagnostic Procedure
STEP
INSPECT AIR MIX ACTUATOR
1
Inspect the air mix actuator.
(See
[FULL-AUTO AIR
Is it normal?
2 INSPECT AIR MIX ACTUATOR
(POTENTIOMETER) CIRCUIT FOR
SHORT TO GROUND
Disconnect the airflow mode actuator
connector.
Is the resistance between terminals 2D
and 2N of the A/C amplifier connector (16-
pin) 698 ohms or more?
Air mix actuator malfunction
Short to ground in wiring harness between A/C amplifier connector
terminals 2D and 2N
Open circuit in wiring harness between A/C amplifier connector terminals
2P and 2N
Connector or terminal malfunction
Open circuit in wiring harness between A/C amplifier connector terminals
2D and 2P
INSPECTION
AIR MIX ACTUATOR INSPECTION
CONDITIONER].)
ACTION
YesGo to the next step.
No Replace the air mix actuator.
(See AIR MIX ACTUATOR
REMOVAL/INSTALLATION [FULL-AUTO
AIR CONDITIONER].)
YesGo to the next step.
No Repair the wiring harness. (Short
circuit)