Power MOSFET Repair Procedures

Inspection

1. 1
   Start.
2. 2
   Turn on the control switch and measure the blower motor voltage.
3. 3
   Select the high speed on the control switch and check that the voltage increases.

   

   

   1. Drain 2. Drain Return

   3. Source 4. Rear Door

   
   Specification

   Segment	Blower Voltage (±0.5 V)
   1	3,6
   2	4,8
   3	5,9
   4	7,0
   5	8.1
   6	9.2
   7	10,6
   8	BATTERY +

Diagnosis with GDS

1. 1
   The heating, ventilation and air conditioning (HVAC) system can be diagnosed quickly (defective parts) using the Global Diagnostic System (GDS). ※ The GDS provides the following information. (1) Self-diagnosis: checks and displays diagnostic trouble codes (DTC). (2) Current data: checks the status of input/output signals. (3) Active test: checks system operating conditions. (4) Additional functions: in addition to control, such as zero point adjustment.
2. 2
   Select the "Vehicle Model" and the system to be checked in order to inspect the vehicle with the scan tool.
3. 3
   Select the "Current Data" menu to check the current input/output status. The input/output data for the sensors related to the MOSFET power can be checked.

   

4. 4
   To perform a forced operation on the MOSFET power input factors, select "ACTUAL TEST".

   

REPLACEMENT

1. 1
   Disconnect the negative (-) battery terminal.
2. 2
   Remove the center fascia panel. (Refer to Instrument Panel - Center Fascia Panel)
3. 3
   Disconnect the MOSFET connector (A), then remove the power MOSFET (B) after loosening the screws.

   

4. 4
   To install, perform the removal procedure in reverse order.