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Home >> Infiniti >> 1992 >> Q45 Base >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - System/Component Tests >> Emission Systems & Sub-Systems >> Exhaust Gas RECIRCULATION (EGR) >> EGR System Check
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EGR System Check

  1. Warm engine to normal operating temperature. Disconnect vacuum line at EGR valve and connect vacuum gauge. Increase engine speed to 2000 RPM. Vacuum should be indicated on gauge.
  2. If vacuum is not indicated, check backpressure transducer, EGR solenoid valve and input signals which ECU uses to control EGR system. See EGR SYSTEM INPUT SIGNALS table. Also check EGR solenoid power supply and harness between ECU and EGR solenoid for opens or shorts.
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