Coasting Richer System

Run engine at idle speed. Connect voltmeter to "H" terminal (Brown/Black wire) of solenoid valve connector. See Fig 1 . Increase engine speed to 3000 RPM and lift idle switch arm. See Fig 2 . Verify voltmeter indicates appropriate voltage in relationship to engine RPM. See COASTING RICHER SYSTEM RPM/VOLTAGE  table.

Fig 1: Checking Coasting Richer Solenoid Valve

Courtesy of MAZDA MOTORS CORP.

Fig 2: Idle Switch Arm Location

Courtesy of MAZDA MOTORS CORP.