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Home >> Mazda >> 2000 >> Millenia Base, 2.5 1 >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - Self-Diagnostics - 2.5L >> Diagnostic Trouble Code Tests >> DTC P1487: EGR Boost Sensor Solenoid Valve, Open Or Short Circuit >> Diagnosis & Repair Procedure
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Diagnosis & Repair Procedure

  1. Inspect all applicable harness connectors. Repair as needed. Using scan tool, access PID/DATA MONITOR. Record PID data for EGRB V. Compare reading with specification. See PIN VOLTAGE/PID VALUE CHARTS article. If data is not within specification, go to next step. If data is within specification, go to step  5 .
  2. Turn ignition off. Disconnect EGR boost sensor solenoid valve connector. Turn ignition on. Measure voltage between ground and terminal "A" (Red/Black wire) on harness connector. If battery voltage is present, go to next step. If battery is not present, check for open or short of Red/Black wire between EGR boost sensor solenoid valve connector and main relay. Repair as needed and go to next step.
  3. Turn ignition off. Disconnect PCM harness connector. PCM is mounted in front of center console, under radio. Check continuity of White/Green wire between terminal "B" on EGR boost sensor solenoid valve harness connector and terminal No. 4P on PCM harness connector. See Figure . Repair as needed. If continuity exists, go to next step.
  4. Check continuity between EGR boost sensor solenoid valve component terminals. If continuity exists, go to next step. If continuity does not exist, replace EGR boost sensor solenoid valve.
  5. Erase DTC. See CLEARING CODES in appropriate SELF-DIAGNOSTICS - INTRODUCTION article. If DTC is present, replace PCM. If DTC is not present, intermittent poor harness connection may have caused DTC to originally set.
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