Amount Of Air Blown From Vents Does Not Change: Outline
AMOUNT OF AIR BLOWN FROM VENTS DOES NOT CHANGE DESCRIPTION AND POSSIBLE CAUSE
| Troubleshooting item |
Amount of air blown from vents does not change |
| Description |
- Blower motor does not operate even if airflow volume control switch is operated (no airflow from vent).
- Blower motor operation does not change even if airflow volume control switch is operated (airflow volume from vent does not change).
|
| Possible cause |
- Blower fan controller detects over-temperature or over-current.
- DTCs are stored in the dash-electrical supply unit. (Detects DTC and activates fail-safe)
- Blower unit malfunction (clogging or interference between blower motor fan and case)
- Blower relay malfunction
- Malfunction in wiring harness (including connector/terminal) between battery and blower relay
- Malfunction in wiring harness (including connector/terminal) between blower relay and dash-electrical supply unit
- Blower motor malfunction
- Malfunction in wiring harness (including connector/terminal) between dash-electrical supply unit and blower motor
- Dash-electrical supply unit malfunction (blower fan controller malfunction)
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 Courtesy of MAZDA MOTORS CORP.
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| 1 |
Battery |
| 2 |
Blower relay |
| 3 |
Dash-electrical supply unit |
| 4 |
Blower motor |