Diagnostic Aids
- The conditions for disabling the side blind zone alert system are captured by DTCs and/or a history buffer that stores the last 16 events, including changes made by the driver and messages displayed in the drivers information center. The history buffer for each side object sensor can be accessed using the scan tool.
- The side blind zone system can be disabled if any off the following occur:
- The driver has selected the Off mode through vehicle personalization menus. The selected mode is retained over ignition cycles. A driver information center message stating that the side blind zone system is off shall be displayed and the outside mirror indicators will be OFF.
- Vehicle Speed Average Validity signal is set Invalid
- Transmission Shift Lever Position Validity signal set to Invalid
- Transmission Virtual Device Availability signal is set to Unavailable or has not been received in the last LOSS OF TRANSMISSION VDA PERIODIC UPDATE calibration
- Engine Virtual Device Availability signal is set to Unavailable or has not been received in the last LOSS OF ENGINE VDA PERIODIC UPDATE calibration
- There is a loss of serial data communication or a side blind zone system DTC is set.
- A blockage condition exists (i.e. mud/snow buildup in front of the sensor). A driver information message stating that the side blind zone system is temporarily unavailable will be displayed. The side blind zone system transitions back to the normal operating state when the blockage is removed. Bumper sticks, labels, and heavy rain storms may also cause this condition. The blockage determination is performed with the vehicle in a drive gear.
- The side blind zone system shall read the GPS latitude and longitude on the serial data bus and calculate if the vehicle is within a Radio Astronomy zone. These zones are located in Europe and require the sensors to be turned off. The "Side Blind Zone Alert System Temporarily Unavailable" message shall be displayed to the driver when this occurs.
- Because the sensors are identical, they may be swapped from one side of the vehicle to the other in an attempt to isolate a concern. Sensors should NOT be swapped from one vehicle to another.
- The side blind zone system is designed to ignore stationary objects; however, the system may occasionally detect guard rails, signs, trees, shrubs, or other stationary objects as an object in the blind zone. This is normal system operation and does not require service.
- The side blind zone system may indicate an object in the blind zone if a trailer is attached to the vehicle, or a bicycle or object is extending out to either side of the vehicle.