Resistance Inspection

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Disconnect the negative battery cable. (See BATTERY REMOVAL/INSTALLATION [MZR 2.5] .)
Disconnect the fuel injector connector.
Inspect the resistance between fuel injector terminals A and B.

Fuel injector resistance

11.4-12.6 ohms [20°C {68°F}]

If not within the specification, replace the fuel injector. (See FUEL INJECTOR REMOVAL/INSTALLATION .)

Fig 1: Inspecting Fuel Injector (MZR 2.5)

Courtesy of MAZDA MOTORS CORP.