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Rear Mount Camera Image Not Output [Entertainment System [With Center Display]]: Notes

WARNING: This page is about a different car, the 2017 Mazda 3. However, it is still accessible from the selected car via links, so may be relevant.
REAR MOUNT CAMERA IMAGE NOT OUTPUT (ENTERTAINMENT SYSTEM - WITH CENTER DISPLAY) - DESCRIPTION & POSSIBLE CAUSES

Description REAR MOUNT CAMERA IMAGE NOT OUTPUT
Navigation image is output, however, rear mount camera image is not output
Possible Causes
  • Connector poor contact or terminal damage
  • Rear mount camera malfunction
  • Open circuit in wiring harness between the following terminals:
    • Connectivity master unit (CMU) terminal 1B and rear mount camera terminal D
    • CMU terminal 1C and rear mount camera terminal A
      • CMU terminal 1D and rear mount camera terminal E
  • Short to power supply in wiring harness between the following terminals:
    • CMU terminal 1B and rear mount camera terminal D
    • CMU terminal 1C and rear mount camera terminal A
      • CMU terminal 1D and rear mount camera terminal E
  • CMU malfunction