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Home >> Mazda >> 2014 >> CX-9 Touring, 3.7L Eng VIN A, AWD >> Repair and Diagnosis >> Engine Performance >> System >> Symptom Troubleshooting - Engine Controls >> No. 9 Fast Idle/Runs On >> Notes

No. 9 Fast Idle/Runs On: Notes

NO. 9 FAST IDLE/RUNS ON REFERENCE CHART (MZI-3.7)

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 
  • CHT sensor malfunction
  • Improper load signal input
    • Refrigerant pressure sensor malfunction
    • Communication error between instrument cluster and PCM
    • Erratic signal from climate control unit (A/C switch, fan switch malfunction)
    • Evaporator temperature sensor malfunction
    • Open or short circuit in wiring harness between front climate control unit terminal 2A and instrument cluster terminal 1C
    • Erratic signal from PSP switch
    • TR switch malfunction
    • Communication error between TCM and PCM
  • Improper operation of drive-by-wire control system
  • Air leakage from intake-air system
  • Cruise control system operation improperly
  • Accelerator pedal position sensor misadjustment