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Rear Mount Camera Image Not Clear/No Image On Screen (Entertainment System): Notes

WARNING: This page is about a different car, the 2018 Mazda 6. However, it is still accessible from the selected car via links, so may be relevant.
REAR MOUNT CAMERA IMAGE NOT CLEAR/NO IMAGE ON SCREEN (ENTERTAINMENT SYSTEM) DESCRIPTION AND POSSIBLE CAUSE

Description REAR MOUNT CAMERA IMAGE NOT CLEAR/NO IMAGE ON SCREEN
  • Navigation image is output, however, rear mount camera image is not output
  • Poor reception from rear mount camera
Possible Causes
  • Effects of non-genuine, after-market electrical components
  • Connector poor contact or terminal damage
  • Rear mount camera malfunction
  • Open circuit in wiring harness between the following terminals:
    • CMU terminal 1B and rear mount camera terminal C
    • CMU terminal 1C and rear mount camera terminal A
      • CMU terminal 1D and rear mount camera terminal D
  • Short to power supply in wiring harness between the following terminals:
    • CMU terminal 1B and rear mount camera terminal C
    • CMU terminal 1C and rear mount camera terminal A
      • CMU terminal 1D and rear mount camera terminal D
  • CMU malfunction
System Wiring Diagram
G12237325