Blocked Sensor

NOTE: Blockage sensing becomes active after the wipers are activated.

NOTE: A blocked state is not a system fault. A blocked state is a normal mode of operation under blocked conditions.

An excessive build-up of materials on the rear bumper sides, such as mud or snow, can cause the BLIS ® or 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 blockage sensing senses the performance degradation and enters the SODL and SODR into a blocked state. The performance degradation means alerting late on targets or additional missed targets. Upon entering a blocked state, the IPMA send a status message over the CAN FD1 to the GWM. The GWM then sends the status message to the IPC and APIM on the HS-CAN3. The message center displays BLIND SPOT NOT AVAILABLE SENSOR BLOCKED or CROSS TRAFFIC NOT AVAILABLE SENSOR BLOCKED and the LH and RH exterior mirror BLIS ®/ CTA Light Emitting Diodes (LEDs) illuminate.

The message center warning can be cleared by the driver, but the amber BLIS ® off RTT in the IPC remains illuminated. A blocked state will self-clear when blockage sensing senses performance has returned to normal operation. The ignition can also be cycled off to clear the blocked state. If the blockage is still present after the ignition cycle, or 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 BLIS ® off IPCRTT is illuminated again.

Due to the nature of a 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.