DTC P0A94: Dc/Dc Converter Performance: 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: DC/DC Converter Performance - Wiring Diagram

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 DETAIL CODE. Using the Subaru Select Monitor, confirm «Detail code» in the freeze frame data of the drive motor control system. < Ref. to DRIVE MOTOR CONTROL SYSTEM , OPERATION, Freeze Frame Data Display.>	Is «Detail code» displayed?	If 0800 is displayed, Go to step 3 . If 0801 - 0806 is displayed, replace the DC/DC converter. < Ref. to DC/DC CONVERTER .>	Replace DMCM. < Ref. to appropriate DRIVE MOTOR CONTROL MODULE in Continuously Variable Transmission TH58A article.>
3 CHECK HARNESS (SHORT TO GROUND). Disconnect the DC/DC converter connector. Disconnect the DMCM connector. Using a tester, measure the resistance between DC/DC converter connector and the ground bolt of inverter frame body. Connector & terminal (R433) No. 2 - Ground bolt of inverter frame body:	Is the resistance 1 MΩ or more?	Go to step 4 .	Repair short to ground circuit in harness between DC/DC converter connector and DMCM connector, or repair the intermediate connector.
4 CHECK HARNESS (OPEN CIRCUIT). Using a tester, measure the resistance between DC/DC converter connector and DMCM connector. Connector & terminal (R433) No. 2 - (R443) No. 19:	Is the resistance less than 1 Ω?	Go to step 5 .	Repair open circuit in harness between DC/DC converter connector and DMCM connector, or repair the intermediate connector.
5 CHECK HARNESS (SHORT TO OTHER SIGNAL). Using the tester, measure the resistance in the DMCM connector. Connector & terminal (R443) No. 19 - (R442) No. 1 - 22: (R443) No. 19 - (R443) No. 1 - 26: (R443) No. 19 - (R436) No. 1 - 8: (R443) No. 19 - (R432) No. 7: (R443) No. 19 - DC/DC converter 12 V output line:	Is the resistance 1 MΩ or more?	Go to step 6 .	Repair short circuit in harness between DC/DC converter connector and DMCM connector, or repair the intermediate connector.
6 CHECK DTC. Replace the DC/DC converter. < Ref. to DC/DC CONVERTER .> Perform the Inspection Mode. < Ref. to INSPECTION MODE .>	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 DC/DC converter.