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Home >> Mazda >> 1994 >> B4000 LE, 4WD, Standard >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - System/Component Tests >> Emission Systems & Sub-Systems >> Deceleration Control System >> EGR Control Valve
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EGR Control Valve

Bring engine to normal operating temperature and operate at idle. Disconnect and plug vacuum hose at EGR control valve. Engine should run smoothly. Connect vacuum pump to EGR control valve, and apply vacuum. See EGR CONTROL VALVE OPERATING VACUUM table. Engine should run rough or stall. If engine does not operate as specified, clean or replace EGR control valve.

EGR POSITION SENSOR VOLTAGE

Terminal (ECU) Volts
"A" (2J)
Without Vacuum About 0.7
With 5.9 In. Hg About 4.7
"B" (3D) Less Than 1.5
"C" (2I) 4.5-5.5
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