NO.1 INSUFFICIENT AIR (OR NO AIR) BLOWN FROM VENTS [MANUAL AIR CONDITIONER]

id0703c2800400

DESCRIPTION

•  Insufficient airflow from vent or duct

•  No airflow from vent or duct

•  Airflow mode does not change

POSSIBLE CAUSE

•  Air filter clogging

•  Blower system malfunction

•  Air vent clogging

•  Duct malfunction

―  Deformation

―  Clogging

―  Air leakage

―  Poor installation

•  A/C unit malfunction

―  Airflow mode link malfunction

―  Airflow mode door malfunction

•  Evaporator frozen due to evaporator temperature sensor malfunction

Diagnostic Procedure

Step

Inspection

Action

1

INSPECT AIR FILTER FOR CLOGGING

•  Is the air filter clogged?

Yes

Replace the air filter.

Go to step 9.

No

Go to the next step.

2

VERIFY BLOWER MOTOR OPERATION

•  Switch the ignition ON (engine off or on).

•  Set the airflow volume control switch to MAX.

•  Does the blower motor rotate?

Yes

Go to the next step.

No

Go to the following symptom troubleshooting.

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

3

VERIFY AIRFLOW CONDITION

•  Set the airflow mode to VENT mode.

•  Turn the A/C switch off.

•  Set the airflow volume control switch to MAX.

•  Does sufficient air flow from the vents when the airflow mode is in VENT mode?

Yes

Go to the next step.

No

Go to Step 6.

4

VERIFY AIRFLOW CONDITION

•  Set the airflow mode to HEAT mode.

•  Turn the A/C switch off.

•  Set the airflow volume control switch to MAX.

•  Does sufficient air flow from the vents when the airflow mode is in HEAT mode?

Yes

Go to the next step.

No

Go to Step 6.

5

VERIFY AIRFLOW CONDITION

•  Set the airflow mode to DEFROSTER mode.

•  Turn the A/C switch off.

•  Set the airflow volume control switch to MAX.

•  Does sufficient air flow from the vents when the airflow mode is in DEFROSTER mode?

Yes

Go to Step 7.

No

Go to the next step.

6

VERIFY DUCT INSTALLATION CONDITION

•  Is the duct under any of the following conditions? Clogging Deformation Air leakage Poor installation
(See DASHBOARD REMOVAL/INSTALLATION.)

(See FRONT HEAT DUCT REMOVAL/INSTALLATION.)

(See REAR HEAT DUCT REMOVAL/INSTALLATION.)

Yes

Go to the next step.

No

Install the incorrectly installed ducts properly, then go to Step 8.

(See DASHBOARD DISASSEMBLY/ASSEMBLY.)

(See FRONT HEAT DUCT REMOVAL/INSTALLATION.)

(See REAR HEAT DUCT REMOVAL/INSTALLATION.)

7

VERIFY EVAPORATOR TEMPERATURE SENSOR

•  Inspect the evaporator temperature sensor.
(See EVAPORATOR TEMPERATURE SENSOR INSPECTION [MANUAL AIR CONDITIONER].)

•  Is the evaporator temperature sensor normal?

Yes

Go to the next step.

No

Replace the evaporator temperature sensor.

(See EVAPORATOR TEMPERATURE SENSOR REMOVAL/INSTALLATION [MANUAL AIR CONDITIONER].)

Go to Step 8.

8

VERIFY THAT MALFUNCTION SYMPTOM DOES NOT RECUR AFTER REPAIR

•  Is air discharged from vent?

Yes

Troubleshooting completed.

Explain repairs to customer.

No

Recheck malfunction symptoms, then repeat from Step 1 if the malfunction recurs.

Step	Inspection		Action
1	INSPECT AIR FILTER FOR CLOGGING • Is the air filter clogged?	Yes	Replace the air filter. Go to step 9.
1		No	Go to the next step.
2	VERIFY BLOWER MOTOR OPERATION • Switch the ignition ON (engine off or on). • Set the airflow volume control switch to MAX. • Does the blower motor rotate?	Yes	Go to the next step.
2		No	Go to the following symptom troubleshooting. (See NO.2 AMOUNT OF AIR BLOWN FROM VENTS DOES NOT CHANGE [MANUAL AIR CONDITIONER].)
3	VERIFY AIRFLOW CONDITION • Set the airflow mode to VENT mode. • Turn the A/C switch off. • Set the airflow volume control switch to MAX. • Does sufficient air flow from the vents when the airflow mode is in VENT mode?	Yes	Go to the next step.
3		No	Go to Step 6.
4	VERIFY AIRFLOW CONDITION • Set the airflow mode to HEAT mode. • Turn the A/C switch off. • Set the airflow volume control switch to MAX. • Does sufficient air flow from the vents when the airflow mode is in HEAT mode?	Yes	Go to the next step.
4		No	Go to Step 6.
5	VERIFY AIRFLOW CONDITION • Set the airflow mode to DEFROSTER mode. • Turn the A/C switch off. • Set the airflow volume control switch to MAX. • Does sufficient air flow from the vents when the airflow mode is in DEFROSTER mode?	Yes	Go to Step 7.
5		No	Go to the next step.
6	VERIFY DUCT INSTALLATION CONDITION • Is the duct under any of the following conditions? Clogging Deformation Air leakage Poor installation (See DASHBOARD REMOVAL/INSTALLATION.) (See FRONT HEAT DUCT REMOVAL/INSTALLATION.) (See REAR HEAT DUCT REMOVAL/INSTALLATION.)	Yes	Go to the next step.
6		No	Install the incorrectly installed ducts properly, then go to Step 8. (See DASHBOARD DISASSEMBLY/ASSEMBLY.) (See FRONT HEAT DUCT REMOVAL/INSTALLATION.) (See REAR HEAT DUCT REMOVAL/INSTALLATION.)
7	VERIFY EVAPORATOR TEMPERATURE SENSOR • Inspect the evaporator temperature sensor. (See EVAPORATOR TEMPERATURE SENSOR INSPECTION [MANUAL AIR CONDITIONER].) • Is the evaporator temperature sensor normal?	Yes	Go to the next step.
7		No	Replace the evaporator temperature sensor. (See EVAPORATOR TEMPERATURE SENSOR REMOVAL/INSTALLATION [MANUAL AIR CONDITIONER].) Go to Step 8.
8	VERIFY THAT MALFUNCTION SYMPTOM DOES NOT RECUR AFTER REPAIR • Is air discharged from vent?	Yes	Troubleshooting completed. Explain repairs to customer.
8		No	Recheck malfunction symptoms, then repeat from Step 1 if the malfunction recurs.