NO.2 AMOUNT OF AIR BLOWN FROM VENTS DOES NOT CHANGE [MANUAL AIR CONDITIONER]

id0703c2800500

2
Amount of air blown from vents does not change.
DESCRIPTION
•  Malfunction in blower system
POSSIBLE CAUSE
•  Blower unit malfunction
•  Blower motor malfunction
•  Clogged in A/C unit passage

Diagnostic procedure

STEP

INSPECTION

ACTION
1
INSPECT BLOWER SYSTEM
•  Inspect the following systems and electrical parts.
―  Blower relay
―  Blower motor
―  Resistor
―  Fan switch
―  Related wiring harnesses
•  Are they normal?
Yes
Go to the next step.
No
Repair or replace the malfunctioning part, then go to Step 5.
2
INSPECT TO SEE WHETHER MALFUNCTION IS IN A/C UNIT OR ELSEWHERE
•  Switch the ignition ON (engine off or on).
•  Turn the fan switch to ON position.
•  Recirculate air inside the vehicle.
•  Does the blower motor rotate smoothly?
Yes
Go to Step 4.
No
Go to the next step.
3
INSPECT BLOWER UNIT INTAKE VENT
•  Inspect blower motor.
―  Is the fan free of interference from the A/C unit case?
―  Is the fan free of foreign material and obstructions?
•  Is the fan normal?
Yes
Go to the next step.
No
Remove obstruction, repair or replace the fan and A/C unit case, then go to Step 5.
4
INSPECT BLOWER UNIT INTAKE VENT
•  Is the blower unit intake vent clogged?
Yes
Remove obstruction, then go to the next step.
No
Inspect it there are not any obstructions in the blower unit passage, then go to the next step.
5
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 the malfunction recurs.