DTC P1C20: Manufacturer Controlled DTC: 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: Manufacturer Controlled DTC - Wiring Diagram

Courtesy of SUBARU OF AMERICA, INC.

DTC PROCEDURE

Step	Check	Yes	No
1 CHECK DTC. Read DTCs of the following system. Battery energy control system < Ref. to BATTERY ENERGY CONTROL SYSTEM , OPERATION, Read Diagnostic Trouble Code (DTC).>	Is DTC detected? (current malfunction)	Perform the diagnosis according to DTC. < Ref. to BATTERY ENERGY CONTROL SYSTEM , LIST, List of Diagnostic Trouble Code (DTC).>	Go to step 2 .
2 CHECK READY. Start the engine.	Does READY come on?	Even if DTC is detected, the circuit has returned to a normal condition at this time. Reproduce the failure, and then perform the diagnosis again. NOTE: In this case, temporary poor contact of connector, temporary open or short circuit of harness may be the cause.	Go to step 3 .
3 CHECK DTC. With engine running, read DTCs of the following system. Hybrid powertrain control system < Ref. to HYBRID POWERTRAIN CONTROL SYSTEM , OPERATION, Read Diagnostic Trouble Code (DTC).> Battery energy control system < Ref. to BATTERY ENERGY CONTROL SYSTEM , OPERATION, Read Diagnostic Trouble Code (DTC).> Drive motor control system < Ref. to DRIVE MOTOR CONTROL SYSTEM , OPERATION, Read Diagnostic Trouble Code (DTC).> Engine < Ref. to READ DIAGNOSTIC TROUBLE CODE (DTC) .> Transmission < Ref. to appropriate READ DIAGNOSTIC TROUBLE CODE (DTC) in CVT Diagnostics (TR58A) article.>	Are any DTCs other than DTC P1C20 detected? (current malfunction)	Perform the diagnosis according to DTC. < Ref. to LIST , List of Diagnostic Trouble Code (DTC).>	Go to step 4 .
4 CHECK BUS BAR. Turn the ignition 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. Check the bus bar.	Is the condition normal? (Check for loose bolts, insecure connection, foreign matter caught, trace of arc (burnt terminals) etc.)	Go to step 5 .	Retighten the bolts. Or replace the bus bar.
5 CHECK ELECTRIC NOISE FILTER (INTERNAL SHORT). Remove the electric noise filter. Measure the resistance between each terminal of electric noise filter. Connector & terminal (HV6) P - (HV6) N: (HV6) P - Electric noise filter ground: (HV6) N - Electric noise filter ground:	Is the resistance 1 MΩ or more?	Go to step 6 .	Replace the electric noise filter. < Ref. to NOISE FILTER .>
6 CHECK DRIVE MOTOR INVERTER. Replace the drive motor inverter. < Ref. to INVERTER .> 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 drive motor inverter.