NO.2 NO BLOWN AIR IN AIRFLOW MODE/BLOWN AIR VOLUME DOES NOT CHANGE AT ANY FAN SPEED. [5R55S]

id070304804300

2
No blown air in airflow mode.Blown air volume does not change at any fan speed.
DESCRIPTION
•  Malfunction in blower system.
POSSIBLE CAUSE
•  Blower motor, resistor, fan switch malfunction (Step 1)
•  Blower unit malfunction (Steps 2—4)

Diagnostic procedure

STEP

INSPECTION

ACTION
1
INSPECT BLOWER SYSTEM
•  Inspect the following systems and electrical parts.
―  Blower motor
―  Resistor
―  Fan switch
•  Are they okay?
Yes
Go to the next step.
No
Repair or replace malfunctioning part, then go to Step 5.
2
CHECK TO SEE WHETHER MALFUNCTION IS IN BLOWER UNIT OR ELSEWHERE
•  Turn engine switch to ON position.
•  Turn fan switch on.
•  Is noise coming from blower unit.
Yes
Go to the next step.
No
Go to Step 4.
3
INSPECT BLOWER UNIT
•  Inspect fan in blower unit.
―  Is fan free of interference from blower unit case?
―  Is fan free of foreign material and obstructions?
•  Is fan normal?
Yes
Go to the next step.
No
Remove obstruction, repair or replace fan and blower unit case, then go to Step 5.
4
INSPECT BLOWER UNIT INTAKE VENT
•  Is blower unit intake vent clogged?
Yes
Remove obstruction, then go to the next step.
No
Inspect if there are any obstructions in passage between blower unit and heater unit, then go to the next step.
5
COMFIRM THAT MALFUNCTION SYMPTOM DO NOT RECUR 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.