Hyundai Santa Fe (TM): Blower / Power Mosfet (DATC). Repair procedures

Hyundai Santa Fe (TM) 2019-2023 Service and Repair Manual / Heating,Ventilation And Air Conditioning / Blower / Power Mosfet (DATC). Repair procedures

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

Specification
Fan Speed
Manual Control
Auto Control
A/C ON
A/C OFF
Floor, MIX mode
Not floor, MIX mode
Floor, MIX mode
Not floor, MIX mode
1
 4.2V
 3.4V
 4.2V
 3.4V
 ~ 4.6V
2
 5.3V
 4.6V
 5.3V
 4.6V
 4.6 ~ 5.5V
3
 6.2V
 5.5V
 6.2V
 5.5V
 5.5 ~ 6.6V
4
 6.9V
 6.6V
 6.9V
 6.6V
 6.6 ~ 7.8V
5
 8.0V
 8.0V
 8.0V
 8.0V
 7.8 ~ 9.0V
6
 9.2V
 9.4V
 9.2V
 9.4V
 9.0 ~ 10.2V
7
 11.0V
 11.0V
 11.0V
 11.0V
 10.2 ~ 12.5V
8
 BATTERY (B+)

4.
If the measured voltage is not within specification, substitute with a known-good power mosfet and check for proper operation.
5.
Replace the power mosfet if it is proved that there is a problem with it.
Replacement
1.
Disconnect the negative (-) battery terminal.
2.
Remove the glove box.
(Refer to Body - "Glove Box")
3.
Disconnect the connector (A) and then remove the power mosfet (B) after loosening the mounting screws.
4.
Install in the reverse order of removal.

    Inspection 1. Measure the resistance between the terminals. 2. The measured resistance is not within specification, the blower resistor must be replaced.

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