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DTC B2503: Nose view camera fault
 
 
 
 
TROUBLE JUDGMENT
If signal from the front-view camera cannot be received for 5 seconds or more, the camera-ECU sets DTC No. B2503.
noteWhen DTC No. B2503 is set, the segment, which corresponds to a defective camera, is displayed in blue.
 
 
TROUBLESHOOTING HINTS
  • The front-view camera may be defective
  • The camera-ECU may be defective
  • The wiring harness or connectors may have loose, corroded, or damaged terminals, or terminals pushed back in the connector
 
 
DIAGNOSIS
Required Special Tools:
  • MB991223: Harness Set
  • MB992006: Extra Fine Probe
STEP 1. Check the wiring harness between front-view camera connector and camera-ECU connector.
Check the following.
  • Check of open circuit in ACCN line.
  • Check of open circuit in GNDN line.
  • Check of open or short circuit in VNV line.
  • Check of open circuit in N-EX line.
Is the check result normal?
Go to Step 2.
Repair the connector(s) or wiring harness.
 
STEP 2. Recheck for diagnostic trouble code.
Check again if the DTC is set in the camera-ECU.
(1) Erase the DTC.
(2) Turn the ignition switch from the "LOCK" (OFF) position to the "ON" position.
(3) Check if the DTC is set.
Is the DTC set?
Go to Step 3.
The trouble can be an intermittent malfunction (Refer to GROUP 00 - How to use Troubleshooting/Inspection Service Points - How to Cope with Intermittent Malfunction ).
 
STEP 3. Check the front-view camera.
Use an oscilloscope to check the output waveform of the front-view camera.
Is the check result normal?
Go to Step 4.
Replace the front-view camera (Refer to ).
 
STEP 4. Recheck for diagnostic trouble code.
Check again if the DTC is set in the camera-ECU.
(1) Erase the DTC.
(2) Turn the ignition switch from the "LOCK" (OFF) position to the "ON" position.
(3) Check if the DTC is set.
Is the DTC set?
Replace the camera-ECU (Refer to ).
The trouble can be an intermittent malfunction (Refer to GROUP 00 - How to use Troubleshooting/Inspection Service Points - How to Cope with Intermittent Malfunction ).