Integrated Control Module And Radar Under Rear Bumper
The control module and radar control module unit are integrated and designated Side Obstacle Detection Control Module Left (SODL) respectively Side Obstacle Detection Control Module Right (SODR). Both control modules are identical in terms of function, therefore both control modules are described together in this document. Both control modules are part of the BLind Spot Information System and have the task of managing the functions for:
- Lane Change Merge Aid (LCMA).
- Cross Traffic Alert (CTA).
The functions are based on an assistance system to help the driver of the vehicle when moving laterally and when reversing. These functions are made possible by two radar control modules, Side Obstacle Detection Control Module Left (SODL) and Side Obstacle Detection Control Module Right (SODR), which are two sensors that are used to identify and measure targets moving in the same direction and that are within the area of detection of the radar control modules. The assistance system also consists of two LEDs that are located on the panel at the front on the inside of each window. The two LEDs are used to visually alert the driver when changing lanes or reversing out of a concealed parking space, to thereby reduce or avoid a collision. The LEDs are directly connected to the Driver door module (DDM) and Passenger door module (PDM).
The Side Obstacle Detection Control Module Left (SODL) and Side Obstacle Detection Control Module Right (SODR) communicates with other control modules and components via CAN communication. Both control modules check their calculations and all performed activations, as well as input and output signals via integrated diagnostics. When a control module detects a fault, a Diagnostic Trouble Code (DTC) is stored. In some cases, the incorrect signal is replaced with a substitute value. Any DTCs are stored in the respective control module memory. The information can be read out using the diagnostic tool.
If any of the control modules detects a fault, a Diagnostic Trouble Code (DTC) is stored inside the control module's internal memory. At the same time, a number of values are stored. These are frozen at the time the fault occurred. Depending on the severity of the fault, certain functions may be partially or completely disengaged. Diagnostic trouble codes (DTCs) and frozen values (extended Diagnostic Trouble Code (DTC) information) can be read off using VADIS via the Data Link Connector (DLC) in the vehicle.
When one of the control modules detects a fault, a DTC is stored in the detecting control module. In connection with this, the Lane Change Merge Aid (LCMA) and/or Cross Traffic Alert (CTA) functions switch off on both sides of the car.
The Side Obstacle Detection Control Module Left (SODL) and Side Obstacle Detection Control Module Right (SODR) are powered via the Central Electronic Module (CEM) and grounded to the body.
A simple check, to determine that the control modules are powered and grounded, is, when starting the engine, to observe the start sequence for the Lane Change Merge Aid (LCMA) and Cross Traffic Alert (CTA) functions, which means that the LEDs, which are located on the panel at the front on the inside of each window, flash once. If the LEDs flash, then the Side Obstacle Detection Control Module Left (SODL) and Side Obstacle Detection Control Module Right (SODR) are powered and grounded.