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Home >> Subaru >> 2022 >> Ascent Base >> Repair and Diagnosis (Single Page) >> Engine Performance >> System >> Engine Control System (Diagnostics) (2 Of 4) >> Diagnostic Procedure with Diagnostic Trouble Code (DTC) >> DTC P050A: Cold Start Idle Control System Performance >> General Description >> Diagnostic Method
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Diagnostic Method

<Idle speed diagnosis> 

Judge as NG when the following conditions are established.

JUDGMENT VALUE SPECIFICATION

Malfunction Criteria Threshold Value DTC
Actual engine speed - Target engine speed Less than -300 rpm P050A

<Final ignition timing diagnosis: Idle> 

Judge as NG when the following conditions are established.

JUDGMENT VALUE SPECIFICATION

Malfunction Criteria Threshold Value DTC
<N range>
Final ignition timing - ignition timing during CSERS(1)
<D range:>
Final ignition timing - ignition timing during CSERS(1)
More than 8.5 ° CA
More than 8.5 ° CA
P050A
(1) Ignition timing during CSERS (Cold Start Emission Reduction Strategy) = Base ignition timing -Retard amount

<Final ignition timing diagnosis: Non-idle> 

Judge as NG when the following conditions are established.

JUDGMENT VALUE SPECIFICATION

Malfunction Criteria Threshold Value DTC
Final ignition timing - ignition timing during CSERS(1) More than 8.5 ° CA P050B
(1) Ignition timing during CSERS (Cold Start Emission Reduction Strategy) = Base ignition timing -Retard amount

Time needed for diagnosis:  7000 ms

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