Power MOSFET (DATC)

Repair Procedures

Inspection

1. 1
   Turn the ignition on.
2. 2
   Manually operate the control switch and measure the blower motor voltage.
3. 3
   Select the control switch to raise the voltage to high speed.

   

   Specification

   Fan Speed	Manual Operation				Automatic Control
   	A/C ON		A/C OFF
   	Floor, MIX Mode	Non-Floor, MIX Mode	Floor, MIX Mode	Non-Floor, MIX Mode
   1	4.5 V	3.8 V	4.5 V	3.8 V	~ 4.6 V
   2	5.3 V	5V	5.3 V	5V	4.6 ~ 5.5 V
   3	6.2 V	6.1 V	6.2 V	6.1 V	5.5 ~ 6.6 V
   4	6.9 V	7.3 V	6.9 V	7.3 V	6.6 ~ 7.8 V
   5	8.0 V	8.5 V	8.0 V	8.5 V	7.8 ~ 9.0 V
   6	9.2 V	9.7 V	9.2 V	9.7 V	9.0 ~ 10.2 V
   7	11.0 V	10.9 V	11.0 V	10.9 V	10.2 ~ 12.5 V
   8	BATTERY (B+)

4. 4
   If the measured voltage does not meet the specification, replace the power MOSFET with a known good one and check operation.
5. 5
   Replace the power MOSFET if it is confirmed to be faulty.

Replacement

1. 1
   Disconnect the negative (-) battery terminal.
2. 2
   Remove the passenger side protective pad under the cover (A).

   

3. 3
   Loosen the mounting screws and remove the passenger side duct (A).

   

4. 4
   Disconnect the connector (A), loosen the mounting screws, and remove the power MOSFET (B).

   

5. 5
   Install in the reverse order of removal.