Mazda 2002 6 Workshop Manual page 1213

Diagnostic Procedure
STEP
• Disconnect airflow mode actuator connector.
1
• Connect battery positive voltage to terminal
D (or terminal F) and ground to terminal F (or
terminal D) of airflow mode actuator
connector.
• Does airflow mode actuator operate?
• Remove airflow mode actuator.
2
• Operate airflow mode main link by hand.
• Does airflow mode main link operate
smoothly?
• Disconnect climate control unit connect (12-
3
pin).
• Connect battery positive voltage to terminal
2G (or terminal 2E) and ground to terminal
2E (or terminal 2G) of climate control unit
connector (24-pin).
• Does airflow mode actuator operate?
End Of Sie
DTC 02, 18, 21 (WHEN TWO OR MORE DTCS ARE INDICATED AT THE SAME TIME)
DTC 02, 18, 21 Climate control unit (+5 V power supply) inspection
• Climate control unit malfunction
• Short circuit between climate control unit and solar radiation sensor
• Short circuit between climate control unit and air mix actuator
POSSIBLE
• Short circuit between climate control unit and airflow mode actuator
CAUSE
• Open circuit between climate control unit and solar radiation sensor
• Open circuit between climate control unit and air mix actuator
• Open circuit between climate control unit and airflow mode actuator
Diagnostic Procedure
STEP
• Disconnect climate control unit cooonnector
1
(24-pin) and airflow mode actuator
connector.
• Is there continuity between terminal 1B of
climate control unit connector (24-pin) and
terminal B of airflow mode actuator
connector?
• Is there short circuit to ground between
2
terminal 1B of climate control unit connector
(24-pin) and terminal B of airflow mode
actuator connector?
• Is there short circuit to ground between
3
terminal 1B of climate control unit connector
(24-pin) and terminal B of air mix actuator
connector?
• Is there short circuit to ground between
4
terminal 1B of climate control unit connector
(24-pin) and terminal A of solar radiation
sensor connector?
End Of Sie
DTC 06, 10, 12, 14, 18, 21 (WHEN TWO OR MORE DTCS ARE INDICATED AT THE SAME TIME)
DTC 06, 10, 12, Climate control unit (+5V power supply or sensor ground system) or sensor ground system
18, 21 inspection
• Climate control unit malfunction
• Open circuit between climate control unit and each temperature sensor
POSSIBLE
• Open circuit between climate control unit and air mix actuator
CAUSE
• Open circuit between climate control unit and airflow mode actuator
U–62
ON-BOARD DIAGNOSTIC
INSPECTION
INSPECTION
Yes Connect airflow mode actuator connector, then go to Step 3.
No Go to next step.
Yes Replace airflow mode actuator.
No Replace airflow mode links and/or airflow mode cranks.
Yes Replace climate control unit.
No Repair wiring harness.
Yes Go to next step.
No Repair wiring harness.
Yes Repair wiring harness.
No Go to next step.
Yes Repair wiring harness.
No Go to next step.
Yes Repair wiring harness.
No Replace climate control unit.
ACTION
A6E857001038W17
ACTION
A6E857001038W18