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HOMESERVICE MANUALSMAZDA20105 SPORT, 2.3 L, STANDARDREPAIR AND DIAGNOSISENGINE PERFORMANCETESTING & DIAGNOSISSYMPTOM TROUBLESHOOTING [L3] - ENGINENO. 9 FAST IDLE/RUNS ONNOTES
2010 Mazda 5 Sport, 2.3 L, Standard

No. 9 Fast Idle/Runs On: Notes

2010 Mazda 5 Sport, 2.3 L, StandardSECTION Notes
SYMPTOM TROUBLESHOOTING - NO. 9 FAST IDLE/RUNS ON [L3]

9 FAST IDLE/RUNS ON
DESCRIPTION 
  • The engine speed continues at fast idle after warm-up.
  • The engine runs after the ignition switch is turned off.
POSSIBLE CAUSE 
  • ECT sensor malfunction
  • Improper load signal input
    • Refrigerant pressure switch malfunction
    • Communication error between climate control unit and instrument cluster
    • Communication error between instrument cluster and PCM
    • Short to GND in wiring harness between BCM terminal 3S and climate control unit terminal E (manual air conditioner)
    • CPP switch malfunction (MTX)
    • Neutral switch malfunction (MTX)
    • TR switch malfunction (ATX)
    • Communication error between TCM and PCM (ATX)
  • Air leakage from intake air system
  • Improper operation of electronic throttle control system
  • APP sensor malfunction
RENDER: 1.0x

NO RELATED

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Stop DIY work and contact a certified mechanic immediately if any of the following apply:

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  • • You are missing required tools, torque specs, or safe lifting equipment.
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