DTC B2112: Lumbar Up 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 up direction. If MSM continues to receive input from lumbar support switch for 30 seconds after requested up motion has ceased, switch is considered shorted. If lumbar vertical position sensor DTC B2112 is currently set and switch is in associated direction of suspect sensor for 30 seconds, switch is considered shorted. MSM DTC B2112 will set when a switch failure is detected. When DTC B2112 is set, lumbar support cannot be moved up. MSM will continue to respond to valid inputs from other manual switches. All memory recall commands will be ignored. DTC B2112 will clear when MSM does not detect switch failure during last monitoring cycle.