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
•  A/C 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 to 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 A/C 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 A/C UNIT INTAKE VENT
•  Is the A/C unit intake vent clogged?
Yes
Remove obstruction, then go to the next step.
No
Inspect it there are not any obstructions in the A/C 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.