Code No. B254E Camera ECU output pictures fault
TROUBLE JUDGEMENT
When the camera-ECU detects an unfeasible image signal for 5 seconds, diagnosis code No.B254E will be set.
PROBABLE CAUSES
- Malfunction of camera-ECU
DIAGNOSIS PROCEDURE
STEP 1. Check the MMCS or display audio operation.
Check if the MMCS or display audio normally and the sound is output.
Q.
Is the check result normal?
Go to Step 2.
Troubleshoot the Mitsubishi Multi Communication System (MMCS) 
, smartphone link display audio or display audio .
STEP 2. Check of short to power supply, short to earth, and open circuit in VOUT line between camera-ECU connector and MMCS connector or display audio connector.
Q.
Is the check result normal?
Go to Step 3.
Repair the connector(s) or wiring harness.
STEP 3. Check whether the diagnosis code is set again.
Check again if the diagnosis code is set in the camera-ECU.
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(1)Erase the diagnosis code.
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(2)Turn the ignition switch from "LOCK" (OFF) position to "ON" position.
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(3)Check if diagnosis code is set.
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Q.
Is the diagnosis code set?
Replace the camera-ECU.
The trouble can be an intermittent malfunction (Refer to GROUP 00 - How to Cope with Intermittent Malfunction).