DTC P04C2: Fuel Fill Door Unlock Control Circuit High: Notes

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

1. -

DTC detecting condition: Immediately at fault recognition

Trouble symptom: Fuel lid does not open.

Wiring diagram: Engine Electrical System Ref. to WIRING SYSTEM (CROSSTREK MODEL (HEV))>ENGINE ELECTRICAL SYSTEM .

G13237467

Courtesy of SUBARU OF AMERICA, INC.

CAUTION: Use the check board when measuring the ECM terminal voltage and resistance. Ref. to ENGINE (DIAGNOSTICS) (H4DO (HEV))>GENERAL DESCRIPTION>PREPARATION TOOL>HOW TO USE CHECK BOARD .

NOTE: After the faulty parts are repaired or replaced, perform the final check in Basic Diagnostic Procedure. Ref. to ENGINE (DIAGNOSTICS) (H4DO (HEV))>BASIC DIAGNOSTIC PROCEDURE>PROCEDURE .

G13615345

Courtesy of SUBARU OF AMERICA, INC.

CHECK HARNESS BETWEEN ECM AND M/B (FUEL FLAP RELAY) (SHORT TO POWER SUPPLY) .
1. Turn the ignition switch to OFF.
2. Remove the fuel flap relay.
3. Disconnect the ECM connector.
4. Measure the voltage between ECM connector and engine ground.
  Connector & terminal
  
  (B134) No. 34 - Engine ground:
  
  Is the voltage 1 V or more?
  
  Yes: Repair the short circuit to power supply in the harness between ECM connector and M/B (fuel flap relay) terminal.
  
  No: Go to 2.
CHECK FUEL FLAP RELAY .
Check the fuel flap relay. Ref. to SECURITY AND LOCKS>RELAY AND FUSE>INSPECTION>CHECK RELAY .

Is the check result OK?

Yes: Repair the poor contact of ECM connector.

No: Replace the fuel flap relay. Ref. to SECURITY AND LOCKS>RELAY AND FUSE>LOCATION .