Mazda 2002 6 Workshop Manual page 1214

Diagnostic Procedure
STEP
• Disconnect climate control unit connector
1
(24-pin) and evaporator temperature sensor
connector.
• Is there continuity between terminal 1I of
climate control unit connector (24-pin) and
terminal A of evaporator temperature sensor
connector?
End Of Sie
DTC 07, 11, 13, 15, 19, 22 (WHEN TWO OR MORE DTCS ARE INDICATED AT THE SAME TIME)
DTC 07, 11, 13, Climate control unit (+5V power supply or sensor ground system) or sensor ground system
15, 19, 22 inspection
• Climate control unit malfunction
• Open circuit between climate control unit 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
Diagnostic Procedure
STEP
• Disconnect climate control unit connector
1
(24-pin) and evaporator temperature sensor
connector.
• Is there open circuit between terminal 1I of
climate control unit connector (24-pin) and
terminal A of evaporator temperature sensor
connector?
End Of Sie
DTC 19, 22 (WHEN TWO OR MORE DTCS ARE INDICATED AT THE SAME TIME)
DTC 19, 22 Climate control unit (+5V 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 connector
1
(24-pin) and airflow mode actuator
connector.
• Is there open circuit between terminal 1B of
climate control unit connector (24-pin) or
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
ON-BOARD DIAGNOSTIC
INSPECTION
INSPECTION
INSPECTION
Yes Replace climate control unit.
No Repair wiring harness.
Yes Repair wiring harness.
No This system is normal at present. (Erase the past failure
from memory.)
Yes Repair wiring harness.
No Go to next step.
Yes Repair wiring harness.
No Go to next step.
Yes Repair wiring harness.
No Go to next step.
Yes Repair wiring harness.
No This system is normal at present. (Erase the past failure
from memory.)
ACTION
A6E857001038W19
ACTION
A6E857001038W20
ACTION
U–63
U