NO.3 AMOUNT OF AIR BLOWN FROM VENTS DOES NOT CHANGE

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NO.3 AMOUNT OF AIR BLOWN FROM VENTS DOES NOT CHANGE

B3E070301038W05

## Manual Air Conditioner

3 | Amount of air blown from vents does not change.
DESCRIPTION | • Malfunction in blower system
POSSIBLE CAUSE | • Blower relay, blower motor, resistor, fan switch malfunction (Step 1) • A/C unit malfunction (Steps 2-4)

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 • Turn the ignition switch to the ON position. • Turn the fan switch on. • 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

• 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 if there are 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.