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Home >> Subaru >> 2019 >> WRX STI Limited >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 7 (Engine Control System (Diagnostics) (Except For STI) (4 Of 4)) >> Diagnostic Procedure with Diagnostic Trouble Code (DTC) >> DTC P226B: Turbocharger/Supercharger Boost Pressure Too High - Mechanical >> Diagnostic Method

Diagnostic Method

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

If the duration of time while the following conditions are met is longer than the time indicated, judge as NG.

JUDGMENT VALUE SPECIFICATION

Malfunction Criteria Threshold Value
Intake manifold pressure > Value from Map
MAP SPECIFICATION

  Barometric pressure (kPa (mmHg, inHg))
64 (480, 18.9) 70.6 (529.5, 20.8) 77.3 (579.8, 22.8) 84 (630.1, 24.8) 90.6 (679.6, 26.8) 93.3 (699.8, 27.6) 96 (720.1, 28.3) 97.3 (729.8, 28.7)
Engine speed (rpm) 1600 212.9 (1597.1, 62.9) 212.9 (1597.1, 62.9) 212.9 (1597.1, 62.9) 212.9 (1597.1, 62.9) 212.9 (1597.1, 62.9) 212.9 (1597.1, 62.9) 212.9 (1597.1, 62.9) 212.9 (1597.1, 62.9)
2400 219.7 (1648.2, 64.9) 219.7 (1648.2, 64.9) 219.7 (1648.2, 64.9) 219.7 (1648.2, 64.9) 219.7 (1648.2, 64.9) 219.7 (1648.2, 64.9) 219.7 (1648.2, 64.9) 219.7 (1648.2, 64.9)
3200 232.7 (1745.7, 68.7) 232.7 (1745.7, 68.7) 232.7 (1745.7, 68.7) 232.7 (1745.7, 68.7) 232.7 (1745.7, 68.7) 232.7 (1745.7, 68.7) 232.7 (1745.7, 68.7) 232.7 (1745.7, 68.7)
4000 208.8 (1566.4, 61.7) 213.5 (1601.7, 63.1) 218.3 (1637.7, 64.5) 223.0 (1672.9, 65.9) 228.0 (1710.4, 67.3) 232.7 (1745.4, 68.7) 232.7 (1745.4, 68.7) 232.7 (1745.4, 68.7)
4800 174.4 (1308.3, 51.5) 184.4 (1383.3, 54.4) 195.8 (1468.9, 57.8) 207.0 (1552.9, 61.1) 221.4 (1660.9, 65.4) 228.3 (1712.7, 67.4) 234.7 (1760.7, 69.3) 234.7 (1760.7, 69.3)
5600 150.7 (1130.5, 44.5) 161.8 (1213.8, 47.8) 176.5 (1324.1, 52.1) 194.2 (1456.9, 57.4) 210.2 (1576.9, 62.1) 216.6 (1624.9, 64.0) 226.3 (1697.7, 66.8) 232.7 (1745.7, 68.7)
(kPa (mmHg, inHg))

* Map is a value when intake air temperature is at 25°C (77°F)

Time needed for diagnosis:  2000 ms

Malfunction indicator light illumination:  Illuminates as soon as a malfunction occurs.