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 | Motor Voltage |
Manual | Auto | |
First speed | 3.80±0.5 | 3.8±0.5 |
Second speed | 4.29±0.5 | 4.9±0.5 |
Third speed | 4.77±0.5 | 6.1±0.5 |
Forth speed | 5.29±0.5 | 7.2±0.5 |
Fifth speed | 5.74±0.5 | 8.3±0.5 |
Sixth speed | 6.23±0.5 | 9.5±0.5 |
Seventh speed | 6.71±0.5 | 10.6±0.5 |
Eighth speed | 7.20±0.5 | Battery (+) |
Ninth speed | 7.69±0.5 | |
Tenth speed | 8.17±0.5 | |
Eleventh speed | 8.66±0.5 | |
Twelf speed | 9.14±0.5 | |
Thirteen speed | 9.63±0.5 | |
Fourteen speed | 10.11±0.5 | |
Fifteen speed | 10.60±0.5 | |
Sixteenth speed | Battery (+) |
AUTO COOLING: Auto speed (4.5V~B+)
AUTO HEATING: Auto speed (4.6V~10.6V)
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.