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Home >> Mazda >> 2017 >> CX-9 Signature >> Repair and Diagnosis (Single Page) >> Engine Performance >> Testing & Diagnosis >> On-Board Diagnostic - Engine Control System (2 Of 5) >> DTC P050A-00; Cold Start IAC System Performance Problem >> Notes
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DTC P050A-00; Cold Start IAC System Performance Problem: Notes

NOTE:
  • To determine the malfunctioning part, proceed with the diagnostics from "Function Inspection Using M-MDS".

Details On DTCs

DETECTION CONDITION AND POSSIBLE CAUSE

DESCRIPTION Cold start IAC system performance problem
DETECTION CONDITION Determination conditions
  • The difference between the actual engine speed and the target engine speed is 100 rpm or more.
Preconditions
  • Engine speed: 500 rpm or more*1
  • Engine coolant temperature: -10-45 °C {14-113 °F}*1
  • Catalytic converter estimated temperature: 380 °C {716 °F} or less*1
  • Vehicle speed: 0 km/h {0 mph}*1
  • The following DTCs are not detected:
    • ECT sensor No. 1 malfunction: P0116:00, P0117:00, P0118:00
    • MAP sensor malfunction: P0107:00, P0108:00
    • BARO sensor malfunction: P2227:00, P2228:00, P2229:00
    • Instrument cluster malfunction: P2610:00
*1: Value can be verified by displaying PIDs using M-MDS
Malfunction determination period
  • 9 s period
Drive cycle
  • 2
Self test type
  • CMDTC self test
Sensor used
  • CKP sensor
  • ECT sensor No. 1
FAIL-SAFE FUNCTION
  • Limits intake air amount
  • Stops high pressure fuel pump control
VEHICLE STATUS WHEN DTCs ARE OUTPUT
  • Illuminates check engine light.
POSSIBLE CAUSE
  • Air suction in intake air system
  • Drive-by-wire control system malfunction
  • Throttle valve malfunction
  • PCM malfunction