DTC P0620: Generator Control Circuit: Wiring Diagram

WARNING: This page is about a different car, the 2015 Subaru XV Crosstrek. However, it is still accessible from the selected car via links, so may be relevant.

Hybrid system < Ref. to WIRING DIAGRAM , Hybrid Electric Vehicle System.>

Fig 1: Generator Control Circuit - Wiring Diagram

Courtesy of SUBARU OF AMERICA, INC.

DTC PROCEDURE

Step	Check	Yes	No
1 CHECK HARNESS (OPEN CIRCUIT). Disconnect the HPCM connector. Disconnect the integrated starter generator connector. Using a tester, measure the resistance between the HPCM connector and integrated starter generator connector. Connector & terminal (B606) No. 14 - (E163) No. 3: (B606) No. 15 - (E163) No. 2:	Is the resistance less than 1 Ω?	Go to step 2 .	Repair the open circuit of the harness between the HPCM connector and integrated starter generator connector, or repair the intermediate connector.
2 CHECK HARNESS (SHORT TO GROUND). Using a tester, measure the resistance between HPCM connector and chassis ground. Connector & terminal (B606) No. 14 - Chassis ground: (B606) No. 15 - Chassis ground:	Is the resistance 1 MΩ or more?	Go to step 3 .	Repair the short circuit to ground in the harness between the HPCM connector and integrated starter generator connector, or repair the intermediate connector.
3 CHECK HARNESS (SHORT TO GROUND). Turn the ignition switch to ON. Using a tester, measure the voltage between the HPCM connector and chassis ground. Connector & terminal (B606) No. 14 (+) - Chassis ground (-): (B606) No. 15 (+) - Chassis ground (-):	Is the voltage less than 1 V?	Replace the integrated starter generator. < Ref. to INTEGRATED STARTER GENERATOR (ISG) .>	Repair the short circuit to power in the harness between the HPCM connector and integrated starter generator connector, or repair the intermediate connector.