Blind Spot Information System (BLIS ®) and Cross Traffic Alert (CTA) Message Center Function

NOTE: Cross Traffic Alert (CTA) system faults may not be detected until the transmission is placed in reverse.

The Blind Spot Information System (BLIS ®) can be turned off by using the blind spot on/off function in the message center. When the Blind Spot Information System (BLIS ®) has been turned off by the driver or if a system fault is present, the Blind Spot Information System (BLIS ®) indicator in the message center remains on. When turning the system from off to on, the exterior mirror Light Emitting Diodes (LEDs) illuminate for approximately 3 seconds. When the Blind Spot Information System (BLIS ®) is turned off, the driver cannot receive any alerts. The system is reactivated on the next ignition cycle.

The Cross Traffic Alert (CTA) system can be turned off by selecting the Cross Traffic Alert (CTA) system on/off function in the message center. The Cross Traffic Alert (CTA) system can only be deactivated in the message center when the transmission is in reverse. The system is reactivated on the next ignition cycle.

There are some system faults that set Diagnostic Trouble Codes (DTCs) in the SODL or SODR. These Diagnostic Trouble Codes (DTCs) can set a message in the IPC message center that displays BLIND SPOT SYSTEM FAULT or CROSS TRAFFIC SYSTEM FAULT. There are also symptom based faults that do not set a DTC.

Blocked Sensor

NOTE: A blockage will only be checked for if the wipers are on for more than 30 seconds.

An excessive build-up for materials on the rear bumper sides, such as mud or snow, can cause the Blind Spot Information System (BLIS ®) or Cross Traffic Alert (CTA) system functionality to degrade. Heavy rain can have the same affect on the system. If a blocked state is detected, the SODL and SODR miss targets, but still count them. After approximately 4 missed and counted targets, the SODL or SODR sends a blocked sensor message over the extended MS-CAN to the BCM. The BCM then sends the message over the MS-CAN to the IPC. The message center displays BLIND SPOT NOT AVAILABLE SENSOR BLOCKED or CROSS TRAFFIC NOT AVAILABLE SENSOR BLOCKED and the LH and RH exterior mirror Blind Spot Information System (BLIS ®)/ Cross Traffic Alert (CTA) Light Emitting Diodes (LEDs) illuminate.

The message center warning can be cleared by the driver, but the amber Blind Spot Information System (BLIS ®) indicator in the IPC remains illuminated. Once the blockage is removed, the system requires some drive time and detection of at least 2 vehicles or objects prior to realizing that it is unblocked. The ignition can also be cycled off to clear the blocked state. However, if the blockage is still present after the ignition cycle, after some drive time the system detects again that it is blocked. The blocked sensor message is displayed again in the message center and the amber Blind Spot Information System (BLIS ®) indicator in the IPC is illuminated again.

Due to the nature of radar technology, it is possible to get a blocked sensor warning without the radar sensor being blocked. This is rare and is known as a false blockage warning. A false blocked condition either self-clears or clears after an ignition cycle.