LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Subaru >> 2018 >> WRX STI >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System (Diagnostics) (2 Of 4) (STI) >> Diagnostic Procedure with Diagnostic Trouble Code (DTC) >> DTC P050A: Cold Start Idle Control System Performance >> Diagnostic Method >> Final ignition timing diagnosis
April 5, 2026: LEMON Manuals is launched! Read the announcement.

Final ignition timing diagnosis

Judge as NG when the following conditions are established.

JUDGMENT VALUE SPECIFICATION

Malfunction Criteria Threshold Value
Final ignition timing - ignition timing during CSERS*
*: Ignition timing during CSERS (Cold Start Emission Reduction Strategy) = Base ignition timing - retard amount
> 6°CA

time needed for diagnosis:  6000ms

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