Resistance Inspection

WARNING: This page is about a different car, the 2020 Mazda MX-5 Miata. 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 drive selection switch. (See DRIVE SELECTION SWITCH REMOVAL/INSTALLATION .)
Measure the resistance between drive selection switch terminals B and C under the following conditions.
Resistance when drive selection switch pressed to SPORT side (forward) and held
- 0 ohms
Resistance when drive selection switch pressed to - side (backward) and held
- 465.3-474.7 ohms
Resistance when any switch not pressed
- 2643.3-2696.7 ohms

Courtesy of MAZDA MOTORS CORP.

If not within the specification, replace the drive selection switch. (See DRIVE SELECTION SWITCH REMOVAL/INSTALLATION .)