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 .

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 and 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 .