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Home >> Subaru >> 2019 >> WRX Base >> Repair and Diagnosis (Single Page) >> Engine Performance >> Testing & Diagnosis >> Engine Control System (Diagnostics) (Except For STI) (2 Of 4) >> Diagnostic Procedure with Diagnostic Trouble Code (DTC) >> DTC P050A: Cold Start Idle Control System Performance >> Execution Condition

Execution Condition

<Idle speed diagnosis>

Secondary parameters Execution condition DTC
Battery voltage ≥ 10.9 V P050A
Barometric pressure ≥ 75.06 kPa (563 mmHg, 22.2 inHg)  
Vehicle speed ≤ 1.9 km/h (1.2 MPH)  
Engine coolant temperature ≤ 75°C (167°F)  
Throttle position < 0.37°CA  
Integrated value of intake air amount < Value of Map 1  
Time of no change in park/neutral position switch ≥ 3000 ms  
Elapsed time after starting the engine ≥ 2000 ms  

<Final ignition timing diagnosis: idle>

Secondary parameters Execution condition DTC
Battery voltage ≥ 10.9 V P050B
Barometric pressure ≥ 75.06 kPa (563 mmHg, 22.2 inHg)  
Engine coolant temperature ≤ 75°C (167°F)  
Throttle position < 0.37°CA  
Integrated value of intake air amount < Value of Map 1  
Time of no change in park/neutral position switch ≥ 3000 ms  
Target retard amount ≥ 10°CA  

<Final ignition timing diagnosis: non-idle>

Secondary parameters Execution condition DTC
Battery voltage ≥ 10.9 V P050B
Barometric pressure ≥ 75.06 kPa (563 mmHg, 22.2 inHg)  
Integrated value of intake air amount < Value of Map 2  
Target retard amount ≥ 8.5°CA  
MAP SPECIFICATION 1 (CVT MODEL)

Engine coolant temperature at engine starting (°C (°F)) -40 (-40) -30 (-22) -20 (-4) -10 (-14) 0 (32) 10 (50) 20 (68) 30 (86)
Integrated value of intake air amount (g (oz)) 833 (29.38) 833 (29.38) 750 (26.45) 683 (24.09) 683 (24.09) 683 (24.09) 633 (22.33) 633 (22.33)
Engine coolant temperature at engine starting (°C (°F)) 40 (104) 50 (122) 60 (140) 70 (158) 75 (167)
Integrated value of intake air amount (g (oz)) 607 (21.41) 607 (21.41) 553 (19.5) 467 (16.47) 467 (16.47)
MAP SPECIFICATION 1 (MT MODEL)

Engine coolant temperature at engine starting (°C (°F)) -40 (-40) -30 (-22) -20 (-4) -10 (-14) 0 (32) 10 (50) 20 (68) 30 (86)
Integrated value of intake air amount (g (oz)) 745 (26.28) 731 (25.78) 687 (24.23) 687 (24.23) 536 (18.9) 500 (17.64) 500 (17.64) 482 (17)
Engine coolant temperature at engine starting (°C (°F)) 40 (104) 50 (122) 60 (140) 70 (158) 75 (167)
Integrated value of intake air amount (g (oz)) 482 (17) 463 (16.33) 463 (16.33) 447 (15.77) 447 (15.77)
MAP SPECIFICATION 2

Engine coolant temperature at engine starting (°C (°F)) -40 (-40) -30 (-22) -20 (-4) -10 (-14) 0 (32) 10 (50) 20 (68) 30 (86)
Integrated value of intake air amount (g (oz)) 1083 (38.2) 1083 (38.2) 1083 (38.2) 1000 (35.27) 1000 (35.27) 1000 (35.27) 1000 (35.27) 1000 (35.27)
Engine coolant temperature at engine starting (°C (°F)) 40 (104) 50 (122) 60 (140) 70 (158) 80 (176)
Integrated value of intake air amount (g (oz)) 1000 (35.27) 833 (29.38) 667 (23.53) 567 (20) 517 (18.23)