B2112

DTC MSM B2101-B2112:

CIRCUIT DESCRIPTION
The Memory Seat Module (MSM) receives inputs from the LH seat switch (Eldorado/Seville only) and the LH lumbar switch. When a switch is operated, it becomes grounded. The MSM recognizes the input and moves the seat or lumbar support in appropriate direction. When any seat or lumbar manual positioning switch input continues to be active for 30 seconds after motion in the requested direction has ceased the switch will be considered shorted. If a seat or lumbar position sensor DTC is currently set, and a switch in the direction associated with the suspect sensor has been active for 30 seconds, the switch will be considered shorted.

CONDITIONS FOR SETTING THE DTC
The MSM will set the appropriate DTC any time it detects a switch failure.

ACTION TAKEN WHEN THE DTC SETS
^ Motor outputs being driven in response to the suspect switch will be de-activated.
^ The MSM will continue to respond to valid inputs from the other manual switches
^ All memory recall commands will be ignored.

CONDITIONS FOR CLEARING THE MIL/DTC
^ The MSM does not detect the switch failure during the last monitoring cycle.

TEST DESCRIPTION
The numbers below refer to step numbers on the diagnostic table.
1. This test determines whether there is a stuck switch or a short to ground in the input wiring to the Memory Seat Module (MSM). If there is a short to ground in the wiring, the DTC should set again. If there is a stuck switch, the DTC should not set again because the LH seat switch is disconnected.