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Home >> Mazda >> 1993 >> MPV LX >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - System/Component Tests - EFI >> Emission Systems & Sub-Systems >> Exhaust Gas RECIRCULATION (EGR - MX-3 DOHC, MX-6, RX7, 626 & 929) >> EGR Position Sensor (MX-6 2.5L & 626 2.5L)

EGR Position Sensor (MX-6 2.5L & 626 2.5L)

  1. Disconnect ECU electrical connector. Connect Engine Signal Monitor (49-9200-162) and Test Harness (49 G018 903) between ECU and wiring harness. Disconnect vacuum hose from EGR control valve. Connect vacuum pump to EGR control valve.
  2. Turn ignition on. Check voltage at adapter harness connector terminals. See Figure . See EGR POSITION SENSOR VOLTAGE  table.
  3. If voltage is not correct at terminals "A" and "B", check wiring harness and connection at ECU connector terminals 2J and 3C. If voltage is not correct at terminal "C", check sensor resistance, wiring harness and ECU connector terminal 2I.
  4. Disconnect EGR position sensor electrical connector. Disconnect vacuum hose from EGR control valve. Apply vacuum to EGR control valve.
  5. Check sensor resistance between indicated terminals. See EGR POSITION SENSOR RESISTANCE  table. If resistance is not within specifications, replace sensor.
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