Resistance inspection

WARNING: This page is about a different variant/trim than selected.

Disconnect the negative battery terminal. (See NEGATIVE BATTERY TERMINAL DISCONNECTION/CONNECTION [(US)] .)
Lift up the vehicle.
Disconnect the exhaust shutter valve connector. (See EXHAUST SYSTEM REMOVAL/INSTALLATION .)
Inspect the resistance between exhaust shutter valve terminals A and B.

Courtesy of MAZDA MOTORS CORP.

Exhaust shutter valve resistance (specification)

0.3-100 ohms [20 °C {68 °F}]

If not within the specification, replace the TWC. (See EXHAUST SHUTTER VALVE REMOVAL/INSTALLATION .)