DTC B2111: Lumbar Down Switch Failed (Am3): Description

Memory Seat Module (MSM) receives inputs from lumbar massage module. Lumbar massage module receives input from left lumbar switch. When switch is operated, it becomes grounded. The input is recognized by MSM, which moves lumbar support in down direction. If MSM continues to receive input from lumbar support switch for 30 seconds after requested down motion has ceased, switch is considered shorted. If lumbar vertical position sensor DTC B2111 is currently set and switch is in associated direction of suspect sensor for 30 seconds, switch is considered shorted. Appropriate MSM DTC B2111 will set when a switch failure is detected. When DTC B2111 is set, lumbar support cannot be moved down. MSM will continue to respond to valid inputs from other manual switches. All memory recall commands will be ignored. DTC B2111 will clear when MSM does not detect switch failure during last monitoring cycle.