Mazda CX-7 2007 Workshop Manual page 1128

TROUBLESHOOTING INDEX
No. TROUBLESHOOTING ITEM
1 Insufficient air (or no air) blown from vents
2 Amount of air blown from vents does not change. (Full-
auto air conditioner)
3 Amount of air blown from vents does not change. (Manual
air conditioner)
4 Air intake mode does not change.
5 No temperature control with climate control unit
6 Windshield fogged.
7 Air from vents not cold enough
8 No cool air
9 Noise while operating A/C system
End Of Sie
NO.1 INSUFFICIENT AIR (OR NO AIR) BLOWN FROM VENTS
1 Insufficient air (or no air) blown from vents
• Problem with each vent and/or duct.
DESCRIPTION
• Airflow mode does not change.
• Malfunction in airflow mode actuator
• Malfunction in VENT mode system
POSSIBLE
• Malfunction in HEAT mode system
CAUSE
• Malfunction in DEFROSTER mode system
Diagnostic procedure
STEP
1 INSPECT AIRFLOW MODE ACTUATOR
• Inspect airflow mode actuator.
• Is it okay?
2 INSPECT TO SEE WHETHER MALFUNCTION
IS IN VENT MODE OR OTHER MODES
• Does air blow out when in the VENT mode?
3 INSPECT VENT
• Is the vent clogged?
4 VERIFY THAT DUCT IN DASHBOARD IS
INSTALLED
• Is the duct in the dashboard properly
installed?
5 INSPECT TO SEE WHETHER MALFUNCTION
IS IN HEAT MODE OR DEFROSTER MODE
• Does air blow out when in the HEAT mode?
6 INSPECT DEFROSTER MODE
• Does air blow out when in the DEFROSTER
mode?
7 INSPECT VENT
• Is the vent clogged?
8 VERIFY THAT DEFROSTER DUCT IS
INSTALLED
• Is the defroster duct properly installed?
9 CONFIRM THAT MALFUNCTION SYMPTOM
DOES NOT RECUR AFTER REPAIR
• Does air blow out?
07-03–4
SYMPTOM TROUBLESHOOTING
INSPECTION
• Problem with each vent and/or duct
• Airflow mode does not change
• Malfunction in blower system
• Malfunction in blower system
• Air intake mode does not change when switching
REC/FRESH mode.
• Malfunction in A/C unit and/or climate control unit
air intake system
• A/C compressor does not operate while airflow
mode is in DEFROSTER or HEAT/DEF modes.
• Air intake mode does not change to FRESH while
airflow mode is in DEFROSTER or HEAT/DEF
modes.
• Magnetic clutch operates but A/C system
malfunctions.
• Magnetic clutch does not operate.
• Noise from magnetic clutch, A/C compressor, hose
or refrigerant line
Yes Go to the next step.
No Repair or replace malfunctioning part in accordance with
further inspection result.
Yes Go to Step 5.
No Go to the next step.
Yes Remove obstruction, then go to Step 9.
No Go to the next step.
Yes Inspect the duct for clogging, deformation and air leakage,
then go to Step 9.
No Install the duct securely in the proper position, then go to
Step 9.
Yes Go to the next step.
No Inspect the vent for clogging, then go to Step 9.
Yes Operation is normal. Recheck malfunction symptoms.
No Go to the next step.
Yes Remove obstruction, then go to Step 9.
No Go to the next step.
Yes Inspect the duct for clogging, deformation, and air leakage,
then go to the next step.
No Install the duct securely in proper position, then go to the
next step.
Yes Troubleshooting completed.
Explain repairs to customer.
No Recheck malfunction symptoms, then repeat from Step 1 if
the malfunction recurs.
id070300800300
DESCRIPTION
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ACTION