DTC P0C05: Drive Motor "A" Phase U-V-W Circuit/Open: 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: Drive Motor A Phase U-V-W Circuit/Open - Wiring Diagram (1 Of 2)

Courtesy of SUBARU OF AMERICA, INC.

Fig 2: Drive Motor A Phase U-V-W Circuit/Open - Wiring Diagram (2 Of 2)

Courtesy of SUBARU OF AMERICA, INC.

DTC PROCEDURE

Step	Check	Yes	No
1 CHECK DTC. Read the DTC. < Ref. to DRIVE MOTOR CONTROL SYSTEM , OPERATION, Read Diagnostic Trouble Code (DTC).>	Are any other DTCs detected? (current malfunction)	Perform the diagnosis according to DTC. < Ref. to DRIVE MOTOR CONTROL SYSTEM , LIST, List of Diagnostic Trouble Code (DTC).>	Go to step 2 .
2 CHECK HARNESS (OPEN CIRCUIT IN INVERTER CONTROL GND). Turn the ignition switch to OFF. Disconnect the ground cable of the 12 volt auxiliary battery, and as for the 12 volt engine restart battery, disconnect the ground cable from the 12V engine restart battery sensor. < Ref. to BATTERY , NOTE, Note.> Remove the service disconnect plug. < Ref. to SERVICE PLUG .> Wait for 10 minutes. Disconnect the DMCM connector. Disconnect the drive motor inverter connector. Using a tester, measure the resistance between the drive motor inverter connector and the ground bolt of inverter frame body. Connector & terminal: (R432) No. 12 - Ground bolt of inverter frame body:	Is the resistance less than 1 Ω?	Go to step 3 .	Repair open circuit in harness between drive motor inverter connector and chassis ground, or repair the intermediate connector.
3 CHECK HARNESS (OPEN CIRCUIT). Using a tester, measure the resistance between the drive motor inverter connector and DMCM connector. Connector & terminal: (R442) No. 2 - (R432) No. 5: (R442) No. 1 - (R432) No. 11: (R442) No. 15 - (R432) No. 4: (R442) No. 14 - (R432) No. 10: (R442) No. 13 - (R432) No. 3: (R442) No. 12 - (R432) No. 9:	Is the resistance less than 1 Ω?	Go to step 4 .	Repair open circuit in harness between drive motor inverter connector and DMCM connector, or repair the intermediate connector.
4 CHECK HARNESS (SHORT TO GROUND). Measure the resistance between drive motor inverter connector and chassis ground. Connector & terminal: (R432) No. 5 - Ground bolt of inverter frame body: (R432) No. 11 - Ground bolt of inverter frame body: (R432) No. 4 - Ground bolt of inverter frame body: (R432) No. 10 - Ground bolt of inverter frame body: (R432) No. 3 - Ground bolt of inverter frame body: (R432) No. 9 - Ground bolt of inverter frame body:	Is the resistance 1 MΩ or more?	Go to step 5 .	Repair or replace the circuit in harness and the intermediate connector.
5 CHECK DRIVE MOTOR AND POWER CABLE (OPEN CIRCUIT). Leave the vehicle under temperature of 40°C (104°F) or less for 10 minutes. Disconnect the power cable (HV2) of drive motor inverter. Measure the resistance between each terminal of the power cable. (HV2) U - (HV2) V: (HV2) W - (HV2) U: (HV2) V - (HV2) W:	Is resistance between either lines 1 Ω or more?	Go to step 6 .	Go to step 7 .
6 CHECK DRIVE MOTOR (OPEN CIRCUIT). Disconnect the drive motor power cable (HV1). NOTE: Supply the gasket because it must be replaced. Measure the resistance between each terminal of the power cable. Connector & terminal: (HV1) U - (HV1) V: (HV1) W - (HV1) U: (HV1) V - (HV1) W:	Is resistance between either lines 1 Ω or more?	Replace the drive motor assembly. < Ref. to appropriate DRIVE MOTOR ASSEMBLY in Continuously Variable Transmission TH58A article.>	Replace the power cable. < Ref. to POWER CABLE .>
7 CHECK DRIVE MOTOR INVERTER. Replace the drive motor inverter. < Ref. to INVERTER .> Perform drive cycle A. < Ref. to DRIVE CYCLE A , PROCEDURE, Drive Cycle.>	Is the same DTC detected? (current malfunction)	Replace DMCM. < Ref. to appropriate DRIVE MOTOR CONTROL MODULE in Continuously Variable Transmission TH58A article.>	Problem is present in drive motor inverter.