Mazda 2002 6 - Page 1210

ON-BOARD DIAGNOSTIC
U–59
U
End Of Sie
DTC 14
A6E857001038W09
Diagnostic Procedure
End Of Sie
DTC 15
A6E857001038W10
Diagnostic Procedure
End Of Sie
DTC 18
A6E857001038W11
Diagnostic Procedure
4 • Turn ignition switch to ON position.
• Measure voltage at terminal 1K of climate
control unit connector (24-pin).
• Is voltage approximately 5 V?
Yes This system is normal at present. (Erase the past failure
from memory.)
No Replace climate control unit.
STEP INSPECTION ACTION
DTC 14 Water temperature sensor system inspection
POSSIBLE
CAUSE
• Water temperature sensor malfunction
• Climate control unit malfunction
• Open or short circuit between water temperature sensor and climate control unit
STEP INSPECTION ACTION
1 • Is resistance between terminals 1I and 1O of
climate control unit connector (24-pin) as
indicated below?
• 112 ohms—110 kilohms
Yes Replace climate control unit.
No Go to next step.
2 • Inspect water temperature sensor.
• Is it okay?
Yes Repair wiring harness.
No Replace water temperature sensor.
DTC 15 Water temperature sensor system inspection
POSSIBLE
CAUSE
• Water temperature sensor malfunction
• Climate control unit malfunction
• Open or short circuit between water temperature sensor and climate control unit
STEP INSPECTION ACTION
1 • Is water temperature sensor normal? Yes Go to next step.
No Replace water temperature sensor.
2 • Disconnect climate control unit connector
(24-pin) and water temperature sensor
connector.
• Is there open circuit between following
terminals of climate control unit connector
(24-pin) and water temperature sensor
connector?
— 1O—A
— 1I—B
Yes Repair wiring harness.
No Go to next step.
3 • Is there short circuit to ground between
terminal 1O of climate control unit connector
(24-pin) and terminal A of water temperature
sensor connector?
Yes Repair wiring harness.
No Connect climate control unit connector and go to next step.
4 • Turn the ignition switch to ON position.
• Is voltage at terminal 1O of climate control
unit connector (24-pin) above 5 V?
Yes This system is normal at present. (Erase the past failure
from memory.)
No Replace climate control unit.
DTC 18 Air mix actuator (potentiometer) system inspection
POSSIBLE
CAUSE
• Air mix actuator malfunction
• Climate control unit malfunction
• Open circuit between air mix actuator and climate control unit
• Short circuit between air mix actuator (terminal C) and climate control unit (terminal 1U: 24-pin)
STEP INSPECTION ACTION
1 • Inspect air mix actuator.
• Is it okay?
Yes Go to next step.
No Replace air mix actuator.