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Home >> Subaru >> 2020 >> Crosstrek Base, Automatic CVT Trans >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 6 (P-HEV Hybrid Powertrain Control System (Diagnostics) (1 Of 2)) >> Diagnostic Procedure with Diagnostic Trouble Code (DTC) >> DTC P0A1B-49: Drive Motor "A" Control Module Internal Electronic Failure >> General Description >> Monitor Description

Monitor Description

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The MG ECU (in the Inverter with converter assembly Power control module) performs many diagnostic tests to verify proper operation of internal unit systems. In one of these tests, the MG ECU checks for an R/D (Resolver/Digital converter) malfunction involving the motor resolver. If the MG ECU detects an R/D converter error, it will conclude that there is an internal malfunction involving the motor resolver and the Hybrid vehicle control ECU assembly will illuminate the MIL and store a DTC.

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