626 Models

NOTE: Test procedure is the same for each EGR valve. Test each valve separately.

Disconnect vacuum sensing tubes from solenoid valve and vacuum pipe. Blow through tube "B" shown in Fig 1. Air should pass through valve and escape through port "A".

Fig 1: Three-Way Solenoid Valves Test Connections (626 Models)
Courtesy of MAZDA MOTORS CORP.

Test each valve separately.
Disconnect electrical connector and apply battery power to terminals in connector as shown in Fig 1. Blow through hose again.
Air should pass through valve and escape at solenoid valve air filter. If valve does not respond as outlined, replace 3-way solenoid valve.