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Home >> Mazda >> 1994 >> MX-3 L4-1598cc 1.6L DOHC >> Repair and Diagnosis >> Powertrain Management >> Emission Control Systems >> Exhaust Gas Recirculation >> EGR Valve Position Sensor >> Testing and Inspection
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EGR Valve Position Sensor: Testing and Inspection

OUTPUT VOLTAGE INSPECTION


SST-49 9200 162 Engine Signal Monitor, SST-49 G018 903 Adapter Harness:





1. Connect the special service tools (SST)s to the powertrain control module engine (PCME) as shown in image.


View: Testing The EGR Function Sensor:





2. Connect a vacuum pump to EGR control valve.


EGR Function Sensor Operating Voltages:





3. Turn ignition ON (engine OFF) and measure voltage as shown on image chart.
4. If not correct, check wiring harness from sensor to PCME.

RESISTANCE INSPECTION


View: Testing EGR Function Sensor Resistances:





1. Unplug sensor connector. Disconnect vacuum hose and connect vacuum pump.
2. Measure resistance between terminals with vacuum applied, as shown on image chart:
3. If not as specified, replace EGR control valve assembly.
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