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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 P0AE4-11: Hybrid/EV Battery PRECHARGE Contactor Circuit Short To Ground >> General Description >> Explanation For Circuits

Explanation For Circuits

WARNING: This page is about a different variant/trim than selected.

SMR (system main relay) connects or disconnects the high voltage power supply by the command from Hybrid vehicle control ECU assembly.

SMR system consists of three SMRs and one Limiting resistor. SMR and Limiting resistor are located on HV battery junction block and HV battery junction block.

SMRP and SMRB are first connected in order to connect the high voltage power supply and charge the vehicle side via Limiting resistor. After that, SMRG is connected and then SMRP is opened. The high voltage power supply is disconnected by SMRB and SMRG.

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