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NO.1 INSUFFICIENT AIR (OR NO AIR) BLOWS FROM FRONT VENTS

BME070300000W03

1 | Insufficient air (or no air) blows from front vents.
DESCRIPTION | • Problem with each vent and/or duct.
POSSIBLE CAUSE | • Malfunction in VENT mode system • Malfunction in HEAT mode system • Malfunction in DEFROSTER mode system

Diagnostic procedure

STEP | INSPECTION | ACTION
--- | --- | ---
1 | INSPECT AIRFLOW MODE CONTROL SYSTEM FROM FRONT CLIMATE CONTROL UNIT • When airflow mode control dial from front climate control unit is operated, is appropriate resistance felt and can it be moved throughout its full range? | Yes | Go to next step.
No | Go to Step 1 of troubleshooting index No. 3.
2 | VERIFY WHETHER MALFUNCTION IS IN VENT MODE OR ANOTHER MODES • Does air blow out in VENT mode? | Yes | Go to Step 5.
No | Go to next step.
3 | INSPECT VENT • Is vent clogged? | Yes | Remove obstruction, then go to Step 9.
No | Go to next step.
4 | VERIFY THAT DUCT IN DASHBOARD IS INSTALLED • Is duct in dashboard properly installed? | Yes | Check duct for clogging, deformation and air leakage, then go to Step 9.
No | Install duct securely in the proper position, then go to Step 9.
5 | VERIFY WHETHER MALFUNCTION IS IN HEAT MODE OR DEFROSTER MODE • Does air blow out in HEAT mode? | Yes | Go to next step.
No | Check vent for clogging, then go to Step 9.
6 | INSPECT DEFROSTER MODE • Does air blow out in DEFROSTER mode? | Yes | Operation is okay. Recheck malfunction symptoms.
No | Go to next step.
7 | INSPECT VENT • Is vent clogged? | Yes | Remove obstruction, then go to Step 9.
No | Go to next step.
8 | VERIFY THAT DEFROSTER DUCT IS INSTALLED • Is defroster duct properly installed? | Yes | Check duct for clogging, deformation, and air leakage, then go to next step.
No | Install duct securely in the proper position, then go to next step.
9 | VERIFY THAT MALFUNCTION SYMPTOM OCCURS AFTER REPAIR • Does air blow out? | Yes | Troubleshooting completed. Explain repairs to customer.
No | Recheck malfunction symptoms, then repeat from Step 1 if malfunction recurs.