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Home >> Subaru >> 2020 >> Crosstrek Base, Automatic CVT Trans >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 24 (Engine Control System (Diagnostics) (HEV) (2 Of 4)) >> Diagnostic Procedure with Diagnostic Trouble Code (DTC) >> DTC P050A: Cold Start Idle Control System Performance >> General Description >> Diagnostic Method

Diagnostic Method

WARNING: This page is about a different variant/trim than selected.

Judge as NG when the following conditions are established.

JUDGMENT VALUE SPECIFICATION

Malfunction Criteria Threshold Value DTC
Intake air amount per 7 seconds Less than value of Map4 x Map5 P050A
MAP SPECIFICATION 4

  Engine coolant temperature (°C (°F))
-40 (-40) -30 (-22) -20 (-4) -10 (14) 0 (32) 10 (50) 20 (68) 30 (86)
Target engine speed (rpm) (Control request from HEV system to engine = No) 1150 25 25 25 25 25 25 25 25
1700 51 51 51 54 57 60 69 69
Target engine speed (rpm) (Control request from HEV system to engine = Yes) 1150 32 32 32 32 32 32 32 32
1700 51 51 51 57 60 63 75 75
(°CA)
  Engine coolant temperature (°C (°F))
40 (104) 50 (122) 60 (140) 70 (158) 80 (176) 90 (194) 100 (212) 110 (230)
Target engine speed (rpm)
(Control request from HEV system to engine = No)
1150 25 25 25 25 25 25 25 25
1700 66 60 60 60 60 60 60 60
Target engine speed (rpm)
(Control request from HEV system to engine = Yes)
1150 32 32 32 32 32 32 32 32
1700 66 63 63 63 63 63 63 63
(°CA)
MAP SPECIFICATION 5

Barometric pressure (kPa) 66.7 73.3 80 86.7 93.3 100
Target retard amount in CSERS (°CA) 0.7 0.7 0.8 0.88 0.94 1

Time needed for diagnosis:  Less than 1 s

Malfunction indicator light illumination:  Illuminates when malfunction occurs in 2 continuous driving cycles.

Judge as NG when the following conditions are established.

JUDGMENT VALUE SPECIFICATION

Malfunction Criteria Threshold Value DTC
Final ignition timing - ignition timing during CSERS*
*:
  • CSERS (Cold Start Emission Reduction Strategy)
  • Intermediate ignition timing = Base ignition timing - Retard amount
More than 6.5°CA P050B

Time needed for diagnosis:  7000 ms

Malfunction indicator light illumination:  Illuminates when malfunction occurs in 2 continuous driving cycles.