Mazda 6 2002 Workshop Manual page 1150

STEP
2 • Disconnect airflow mode actuator connector.
• Is resistance between terminals 1U and 1I of
climate control unit connector (24-pin) more
than 387 ohms?
3 • Disconnect climate control unit connector
(24-pin).
• Is resistance between terminals 1B and 1I of
climate control unit connector (24-pin) less
than 4.8 kilohms?
4 • Is resistance between terminals 1B and 1U
of climate control unit connector (24-pin) less
than 4.2 kilohms?
End Of Sie
DTC 19
DTC 19 Air mi actuator (potentiometer) system inspection
• Air mi actuator malfunction
POSSIBLE • Climate control unit malfunction
CAUSE • Open circuit between air mi actuator and climate control unit
• Short circuit between air mi actuator (terminal C) and climate control unit (terminal 1U: 24-pin)
Diagnostic Procedure
STEP
1 • Inspect air mi actuator.
• Is it okay?
2 • Disconnect climate control unit connector
(24-pin) and air mi actuator connector.
• Is there open circuit between following
terminals of climate control unit connector
(24-pin) and air mi actuator connector?
— 1B—B
— 1U—C
— 1I—A
3 • Is there short circuit to ground between
terminal 1U of climate control unit connector
(24-pin) and terminal C of air mi actuator
connector?
End Of Sie
DTC 21
DTC 21 Airflow mode actuator (potentiometer) system inspection
• Airflow mode actuator malfunction
POSSIBLE • Climate control unit malfunction
CAUSE • Open circuit between airflow mode actuator and climate control unit
• Short circuit between airflow mode actuator (terminal C) and climate control unit (terminal 1W: 24-pin)
Diagnostic Procedure
STEP
1 • Inspect airflow mode actuator.
• Is it okay?
2 • Disconnect air mi actuator connector.
• Is resistance between terminals 1W and 1I of
climate control unit connector (24-pin) more
than 387 ohms?
3 • Disconnect climate control unit connector
(24-pin).
• Is resistance between terminals 1B and 1I of
climate control unit connector (24-pin) less
than 4.8 kilohms?
4 • Is resistance between terminals 1B and 1W
of climate control unit connector (24-pin) less
than 4.2 kilohms?
End Of Sie
U–60
ON-BOARD DIAGNOSTIC
INSPECTION
INSPECTION
INSPECTION
Yes Go to net step.
No Repair wiring harness. (Short circuit)
Yes Go to net step.
No Repair wiring harness. (Open circuit)
Yes Replace climate control unit.
No Repair wiring harness. (Open circuit)
Yes Go to net step.
No Replace air mi actuator.
Yes Repair wiring harness.
No Go to net step.
Yes Repair wiring harness.
No This system is normal at present. (Erase the past failure
from memory.)
Yes Go to net step.
No Replace airflow mode actuator.
Yes Go to net step.
No Repair wiring harness. (Short circuit)
Yes Go to net step.
No Repair wiring harness. (Open circuit)
Yes Replace climate control unit.
No Repair wiring harness. (Open circuit)
ACTION
A6E857001038W12
ACTION
A6E857001038W13
ACTION