U0265

Code

Generic U — Network/User

Lost Communication With Image Processing Sensor A

Brand: Generic

Type: U — Network/User

Views: UK: 37 EN: 91 RU: 45

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Page language: EN

Warning lamp or message related to camera/vision/ADAS functions
ADAS features using the camera disabled or degraded (lane assist, adaptive cruise, automatic braking, etc.)
No camera image or blank/black view on infotainment or driver displays
Multiple related communication DTCs stored
Intermittent or permanent loss of camera-dependent functions

Read all codes from all modules; record freeze frame and related codes
Verify ignition state and battery voltage (12 V system) during test
Inspect camera connector(s) and harness for water, corrosion, pin damage
Check relevant fuses and power feeds for the camera/image processor
Use a scan tool to attempt communication with the image processing sensor/module
Measure CAN/CAN-FD or Ethernet bus voltages and look for activity with a scope or diagnostic tool

Bus idle voltages: CAN_H ≈ 2.5 V, CAN_L ≈ 2.5 V (dominant ~CAN_H 3.5 V / CAN_L 1.5 V) — verify with DMM/scope
Differential CAN voltage during activity: pulses with expected bit patterns on scope
Automotive Ethernet link: link-up status and packet activity if vehicle uses Ethernet for camera
Camera power supply voltage (commonly 12 V or regulated 5 V) at connector
Ground resistance: low ohms to chassis ground
Presence/absence of CAN error frames and bus-off conditions reported by scan tool

Capture and note freeze frame and any other U-codes or related faults in other modules.
Verify battery voltage and ignition ON power supply to camera (check fuses and relays).
Visually inspect camera assembly, wiring and connectors for damage, corrosion, water intrusion or loose pins.
With scan tool, attempt to communicate directly with the image processing sensor/module. If accessible, read status and internal codes.
Using a DMM, measure power and ground at the sensor connector. If voltages are out of range, trace supply wiring and repair as needed.
Check network connectivity: measure CAN_H and CAN_L idle voltages and inspect with an oscilloscope for proper waveform and message activity. For Ethernet, verify link lights and packet exchange using an appropriate tester.
Check for proper termination resistors across CAN lines (approx. 60 ohms). Repair any shorts or opens on the bus.
Perform a wiggle/stress test on connectors and harness while monitoring the bus for dropped messages or errors.
If harness and power are good, try swapping in a known-good camera/module (if available) or substitute a known-good connector to isolate unit vs. wiring.
If replacement is required, program/configure the new sensor/module per manufacturer procedure and clear codes. Re-test system operation and verify ADAS functions.
If intermittent faults persist, capture a bus log during failure and consult manufacturer technical service information for software updates or special tests.