Mazda 2002 6 Workshop Manual page 1208

Diagnostic Procedure
STEP
• Is resistance between terminals 1I and 1M of
1
climate control unit connector (24-pin) as
indicated below?
— 137 ohms—220 kilohms
• Inspect cabin temperature sensor.
2
• Is it okay?
End Of Sie
DTC 07
DTC 07 Cabin temperature sensor system inspection
• Cabin temperature sensor malfunction
POSSIBLE
• Climate control unit malfunction
CAUSE
• Open or short circuit between cabin temperature sensor and climate control unit
Diagnostic Procedure
STEP
• Inspect cabin temperature sensor.
1
• Is it okay?
• Disconnect climate control unit connector
2
(24-pin) and cabin temperature sensor
connector.
• Is there open circuit between the following
terminals of climate control unit connector
(24-pin) and cabin temperature sensor
connector?
— 1I—A
— 1M—B
• Is there short circuit to ground between
3
terminal 1M of climate control unit connector
(24-pin) and B of cabin temperature sensor
connector?
• Turn the ignition switch to ON position.
4
• Measure voltage at terminal the following
terminal 1M of climate control unit connector
(24-pin).
• Is voltage approximately 5V?
End Of Sie
DTC 10
DTC 10 Evaporator temperature sensor system inspection
• Evaporator temperature sensor malfunction
POSSIBLE
• Climate control unit malfunction
CAUSE
• Open or short circuit between evaporator temperature sensor and climate control unit
Diagnostic Procedure
STEP
• Is resistance between terminals 1I and 1Q of
1
climate control unit connector (24-pin) as
indicated below?
— 128 ohms—179 kilohms
• Inspect evaporator temperature sensor.
2
• Is it okay?
End Of Sie
DTC 11
DTC 11 Evaporator temperature sensor system inspection
• Evaporator temperature sensor malfunction
POSSIBLE
• Climate control unit malfunction
CAUSE
• Open or short circuit between evaporator temperature sensor and climate control unit
ON-BOARD DIAGNOSTIC
INSPECTION
INSPECTION
INSPECTION
Yes Replace climate control unit.
No Go to next step.
Yes Repair wiring harness.
No Replace cabin temperature sensor.
Yes Go to next step.
No Replace cabin temperature sensor.
Yes Repair wiring harness.
No Go to next step.
Yes Repair wiring harness.
No Connect climate control unit connector, then go to next step.
Yes This system is normal at present. (Erase the past failure
from memory.)
No Replace climate control unit.
Yes Replace climate control unit.
No Go to next step.
Yes Repair wiring harness.
No Replace evaporator temperature sensor.
ACTION
A6E857001038W04
ACTION
A6E857001038W05
ACTION
A6E857001038W06
U–57
U