GM Service Manual Online
For 1990-2009 cars only

Object Detection Description and Operation Rear Vision Camera

The object detection system can help a driver determine how close an object is to the rear bumper within a predefined rearward field of view. The system is composed of a video camera located on the rear bumper, electrical harness and a 3.5 inch LCD display integral to the inside rearview mirror (ISRVM). The object detection system can be disabled by pressing and holding the rear vision ON/OFF button for 3 seconds when the ignition switch is in the ACCESSORY or RUN position. When the object detection power button is pressed the lower LED indicator to the right of the power button will turn off verifying that the system is OFF. The slide-out video feature will remain in the current ON/OFF state during each ignition cycle.

The ISRVM and rearview camera image display module requires B+ signal to enable the rear vision system. This signal is provided by the park/neutral position (PNP) switch (automatic transmission) or backup lamp switch (manual transmission) when placing the transmission in reverse. When the transmission is in the reverse, the rearview camera image display module will supply the camera with a regulated 12-volt power source and ground. The LCD display will deploy and remain deployed until the transmission is moved out of the reverse position. Once the transmission is moved out of the reverse position the display will retract. Anything preventing the display from fully extending will cause the display to retract. A shielded video signal circuit will transfer the video signal through the rearview camera image display module to the ISRVM display.

The mirror can be placed into a service mode to facilitate screen cleaning. With the ignition in the ACCY position, press and hold the rear vision power button for 5-8 seconds or until the display is deployed. The display will remain deployed for 30 seconds. Do not attempt to pull out the display as that may cause internal damage.

The object detection system has the following diagnostic capabilities:

    • The rear vision ON/OFF indicator will flash with the absence of a proper video signal
    • The rear vision ON/OFF indicator will flash when interference of the display deployment has been detected

To begin diagnostics refer to Diagnostic Starting Point - Object Detection .

Object Detection Description and Operation Front Vision Camera

The object detection system can help a driver determine how close an object is to the front bumper within a predefined forward field of view. In Japan, a front vision camera system is necessary for vehicles with a high ground clearance. The system is composed of a video camera located on the top of the roof above the a-pillar on the passenger side, an electrical harness, an on/off switch for the camera, and a 3.5 inch LCD display integral to the inside rearview mirror (ISRVM). All mirror features will default to ON with each ignition cycle. The LCD can be disabled by pressing the forward vision ON/OFF button when the ignition switch is in the ACCESSORY or RUN position. When the object detection power button is pressed the indicator to the right of the power button will turn off verifying that the LCD is OFF. However, the roof top camera system is disabled by pressing the camera button located on the instrument panel. An indicator next to the camera button will turn off verifying that the camera system is OFF

The mirror and the camera receive an active high (12 volt) signal through the camera switch to enable the forward vision system. The same control signal will also disable the auto dimming feature of the ISRVM. The LCD display will deploy in less than 3 seconds and remain deployed until the system is turned off. Once the camera switch is turned off the display will retract in 2-3 seconds. Anything preventing the display from fully extending will cause the display to retract.

The mirror can be placed into a service mode to facilitate screen cleaning. With the ignition in the ACCY position, press and hold the rear vision power button for 5-8 seconds or until the display is deployed. The display will remain deployed for 30 seconds. Do not attempt to pull out the display as that may cause internal damage.

The object detection system has the following diagnostic capabilities:

    • The front vision ON/OFF indicator will flash with the absence of a proper video signal
    • The front vision ON/OFF indicator will flash when interference of the display deployment has been detected

To begin diagnostics refer to Diagnostic Starting Point - Object Detection.