Display not showing but rear camera does in a GM vehicle

Display not showing but rear camera does in a GM vehicle

This is caused by a faulty ACM, and the ACM will need to be replaced. It doesn't matter if the HMI is a 2.0 or 2.5, it would still work. 

This is illustrated when the vehicle is put in reverse and shows a picture, meaning HMI & screen are ok. The ACM has to be linked up with the HMI for the screen to get full functionality, because the ACM has a LIN10 wire going to the screen for lighting up the screen and controls. The HMI has a LIN6 that goes to the screen for the Digitizer to work. This meaning, for the screen to work it needs the ACM and an HMI. 

TLDR: The Linbus communication from the ACM is required with the HMI to wake the screen up for full functionality. Just replace the ACM.

    • Related Articles

    • When screen experiences imaging issues other than back up camera in Chevy vehicles

      In Chevy vehicles, your HMI (Human Machine Interface) controls your visual feedback. Meaning if you experience an issue where the screen is having imaging issues only during certain functions, it may be the HMI, however, if the back up camera has a ...

    • IOB Genie gave green light but screen is black

      This Genie puts the radio into sleep mode while it's programming. This means, after the Genie gives a green LED light, if it's pulled out immediately, the radio screen will stay black.  After turning on the vehicle's engine, letting it run 1 minute, ...

    • "Service Rearview camera" error after installing GM back up camera

      Once confirming you're pre-wired in a 15 model vehicle or installing the camera in a 16 year vehicle or newer, you'll typically want to install the camera wiring into the dummy plug. However, those who have a locking tailgate handle be sure to swap ...

    • Installed Nissan Altima radio and backup camera doesn't work

      With car and radio on, and your audio turned off, press and hold the menu button then turn the volume knob left 3 times, right 3 times, left 3 times, right 3 times. This will take you to the engineering menu. Once there, you'll see an option for ...

    • IOU Upgrade Backup Camera TSB

      On some model Silverado trucks the backup camera mounting location needs to be modified to accept the new camera included in the upgrade. If attempting to install the new camera into the tailgate handle, and you run into an issue where the camera ...