Resistance Inspection

Disconnect the negative battery cable. (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION .)
Remove the plug hole plate. (See PLUG HOLE PLATE REMOVAL/INSTALLATION .)
Remove the intake manifold. (See INTAKE-AIR SYSTEM REMOVAL/INSTALLATION .)
Remove the KS. (See KNOCK SENSOR (KS) REMOVAL/INSTALLATION .)
Measure the resistance between KS terminals A and B.

Courtesy of MAZDA MOTORS CORP.
- If not as specified, replace the KS. (See KNOCK SENSOR (KS) REMOVAL/INSTALLATION .)
Specification (Reference)

504-616 kilohms [10-30°C {50-86°F}]