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Home >> Mazda >> 1989 >> 929 >> Repair and Diagnosis >> Engine Performance >> System >> System/Component Tests - V6 >> Emission Systems & Sub-Systems >> EGR Position Sensor

EGR Position Sensor

  1. Backprobe EGR position sensor connector with voltmeter. See Fig 1 .
  2. With EGR vacuum hose disconnected, connect vacuum pump. Turn ignition on and check voltages at connector. Use EGR POSITION SENSOR VOLTAGE  table to compare results.
    Fig 1: 929 EGR Position Sensor
    G94836Courtesy of MAZDA MOTORS CORP.
    EGR POSITION SENSOR VOLTAGE

    Terminal Voltage
    A 4.5-5.5
    B Less Than 1.5
    C
    Without Vacuum .25-.95
    With Vacuum Approx. 4
  3. If voltage is not correct at terminals A and B, check harness and connection at ECU connector terminals No. 2A and 2C. If voltage is not correct at terminal C, check sensor resistance, harness and ECU connector terminal No. 2F.
  4. Check sensor resistance according to EGR POSITION SENSOR RESISTANCE  table. If resistance is not within specifications, replace sensor.
EGR POSITION SENSOR RESISTANCE

Terminals Ohms
A-B 5000
A-C 700-5000
B-C 700-5000
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