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Home >> Subaru >> 2015 >> WRX Base >> Repair and Diagnosis >> External Pages >> Different car >> Section 249 (Continuously Variable Transmission (Diagnostics)) >> Diagnostic Procedure with Diagnostic Trouble Code (DTC) >> DTC P0890: TCM Power Relay Sense Circuit Low >> General Description >> Diagnostic Method

Diagnostic Method

WARNING: This page is about a different car, the 2022 Subaru WRX. However, it is still accessible from the selected car via links, so may be relevant.

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
Measured TCM input voltage which is supplied from 12 V battery system through the TCM Power Relay Less than 2 V

Time needed for diagnosis:  0.5 s

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

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