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Home >> Subaru >> 2021 >> Forester Touring >> Repair and Diagnosis (Single Page) >> Transmission >> Automatic Trans >> Automatic Transaxle System (Diagnostics) >> Diagnostic Procedure With Diagnostic Trouble Code (DTC) >> DTC U0420: Invalid Data Received From Power Steering Control Module >> Diagnostic Method
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Diagnostic Method

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
CAN data from electric power steering control module Did not change

Time needed for diagnosis  : 2.5 s

Malfunction indicator light illumination  : Does not illuminate.