Power Metal Oxide Semiconductor Field Effect Transistor (Power MOSFET) Inspection
WARNING: This page is about a different car, the 2017 Mazda CX-9. However, it is still accessible from the selected car via links, so may be relevant.
- Disconnect the negative battery terminal. (See NEGATIVE BATTERY TERMINAL DISCONNECTION/CONNECTION .)
- Remove the following parts:
- Selector lever knob (See AUTOMATIC TRANSAXLE SHIFT MECHANISM REMOVAL/INSTALLATION .)
- Shift panel (See SHIFT PANEL REMOVAL/INSTALLATION .)
- Console side panel (See CONSOLE SIDE PANEL REMOVAL/INSTALLATION .)
- Front console (See FRONT CONSOLE REMOVAL/INSTALLATION .)
- Side wall (See SIDE WALL REMOVAL/INSTALLATION .)
- Rear console (See REAR CONSOLE REMOVAL/INSTALLATION .)
- Selector lever component (See AUTOMATIC TRANSAXLE SHIFT MECHANISM REMOVAL/INSTALLATION .)
- Selector lever bracket (See AUTOMATIC TRANSAXLE SHIFT MECHANISM REMOVAL/INSTALLATION .)
- Remove the power MOSFET. (See POWER METAL OXIDE SEMICONDUCTOR FIELD EFFECT TRANSISTOR (POWER MOSFET) REMOVAL/INSTALLATION .)
- Verify that the continuity between the power MOSFET terminals is as indicated in the table.
- If there is any malfunction, replace the power MOSFET. (See POWER METAL OXIDE SEMICONDUCTOR FIELD EFFECT TRANSISTOR (POWER MOSFET) REMOVAL/INSTALLATION .)
- If the blower motor operation is not normal even though no malfunction can be verified, inspect the rear climate control unit. (See REAR CLIMATE CONTROL UNIT INSPECTION .)
| Tester lead | Resistance (kilohm) | |
| + | - | |
| A | B | ∞ |
| A | C | 11 |
| A | D | ∞ |
| B | A | Continuity detected |
| B | C | Continuity detected |
| B | D | 1.5 |
| C | A | 11 |
| C | B | ∞ |
| C | D | ∞ |
| D | A | Continuity detected |
| D | B | 1.5 |
| D | C | Continuity detected |