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2008 - MX-5 - HVAC

NO.1 INSUFFICIENT AIR (OR NO AIR) BLOWN FROM VENTS



1

Insufficient air (or no air) blown from vents.

DESCRIPTION

  • Problem with each vent and/or duct.

  • Airflow mode does not change.

POSSIBLE CAUSE

  • Malfunction in airflow mode actuator

  • Malfunction in VENT mode system

  • Malfunction in HEAT mode system

  • Malfunction in DEFROSTER mode system


Diagnostic procedure

STEP

INSPECTION

ACTION

1

INSPECT AIRFLOW MODE ACTUATOR

  • Inspect airflow mode actuator.

  • Is it okay?

Yes

Go to the next step.

No

Repair or replace malfunctioning part in accordance with further inspection result.

2

INSPECT TO SEE WHETHER MALFUNCTION IS IN VENT MODE OR OTHER MODES

  • Does air blow out when in VENT mode?

Yes

Go to Step 5.

No

Go to the next step.

3

INSPECT VENT

  • Is vent clogged?

Yes

Remove obstruction, then go to Step 9.

No

Go to the next step.

4

VERIFY THAT DUCT IN DASHBOARD IS INSTALLED

  • Is duct in dashboard properly installed?

Yes

Inspect duct for clogging, deformity and air leakage, then go to Step 9.

No

Install duct securely in the proper position, then go to Step 9.

5

INSPECT TO SEE WHETHER MALFUNCTION IS IN HEAT MODE OR DEFROSTER MODE

  • Does air blow out when in HEAT mode?

Yes

Go to the next step.

No

Inspect vent for clogging, then go to Step 9.

6

INSPECT DEFROSTER MODE

  • Does air blow out when in DEFROSTER mode?

Yes

Operation is okay. Recheck malfunction symptoms.

No

Go to the next step.

7

INSPECT VENT

  • Is vent clogged?

Yes

Remove obstruction, then go to Step 9.

No

Go to the next step.

8

VERIFY THAT DEFROSTER DUCT IS INSTALLED

  • Is defroster duct properly installed?

Yes

Inspect duct for clogging, deformity, and air leakage, then go to the next step.

No

Install duct securely in proper position, then go to the next step.

9

CONFIRM THAT MALFUNCTION SYMPTOMS 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.




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