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Home >> Subaru >> 2018 >> WRX Base >> Repair and Diagnosis (Single Page) >> Engine Performance >> System >> Engine Control System (Diagnostics) (2 Of 4) (Except For STI) >> 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 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
Elapsed time after gear position change
(P ↔ D or N ↔ D)
= 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 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
Elapsed time after gear position change
(P ↔ D or N ↔ D)
= 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 kPa (563 mmHg, 22.2 inHg)
Integrated value of intake air amount (CVT model) < Value of Map 2
Target retard amount = 8.5°CA
TEMPERATURE SPECIFICATION - MAP 1

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)
TEMPERATURE SPECIFICATION - MAP 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)
467
(16.47)