Ignition "ON"
Manually operate the control switch and measure the voltage of blower motor between pin 1 and 2.
Select the control switch to raise voltage until high speed.
Fan | Motor Voltage |
Manual | |
First speed | 3.8 ±0.5V |
Second speed | 5.0 ±0.5V |
Third speed | 6.2 ±0.5V |
Fourth speed | 7.4 ±0.5V |
Fifth speed | 8.6 ±0.5V |
Sixth speed | 9.8 ±0.5V |
Seventh speed | 11.0 ±0.5V |
eighth speed | Battary |
*AUTO COOLING: Auto speed (4.5V~B+)
*AUTO HEATING: Auto speed (4.5V~11.0V)
If the measured voltage is not specification, substitute with a known-good power mosfet and check for proper operation.
If the problem is corrected, replace the power mosfet.
Disconnect the negative (-) battery terminal.
Disconnect the power mosfet connector and then remove the power mosfet (A) after loosening the mounting screws.
Installation is the reverse order of removal.
