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Home >> Subaru >> 2019 >> WRX Base >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System (Diagnostics) (Except For STI) (3 Of 4) >> Diagnostic Procedure With Diagnostic Trouble Code (DTC) >> DTC P1604: Startability Malfunction >> Diagnostic Method

Diagnostic Method

Diagnosis 1 

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
Engine speed < 500 rpm

Time needed for diagnosis:  2 - 26 seconds

Diagnosis 2 

Judge as NG when the following conditions are established.

JUDGMENT VALUE SPECIFICATION

Malfunction Criteria Threshold Value
Engine speed < 300 rpm

Time needed for diagnosis:  Less than 1 second

Malfunction indicator light illumination:  Does not illuminate.