B2108

Diagnostic Chart:

Schematic:

CIRCUIT DESCRIPTION
The memory seat module (MSM) receives an input from the LH seat switch front vertical switch when the switch is actuated. When the front vertical switch is operated in the up direction the MSM front vertical up input via CKT 1518 (DK GRN) is grounded. The MSM recognizes the input and tilts the front of the seat in the up direction.

CONDITIONS FOR SETTING THE DTC
^ When the front vertical up switch is active for 30 seconds after motion has ceased, the switch will be considered shorted and the DTC will set.
^ If the seat front vertical position sensor DTC B2118 is current and the front vertical up switch is active for 30 seconds, the switch will be considered shorted and the DTC will set.
^ DTC B2108 will set only if DTC B1982 MSM or DTC B1983 MSM is not current.

ACTION TAKEN WHEN THE DTC SETS
^ The MSM will not tilt the front of the seat in the up direction.
^ The MSM will continue to respond to valid inputs from the other manual switches.
^ All memory recall function commands will be ignored for all directions.

CONDITIONS FOR CLEARING THE DTC
^ The MSM sees that the front vertical up switch is no longer active.
^ Use the On-Boards clearing DTCs feature.
^ Use a scan tool.

TEST DESCRIPTION
The numbers below refer to the step numbers on the diagnostic table:
1. Perform the entire Power Seat Systems Diagnostic System Check before continuing with the diagnosis of this DTC.
2 Determines whether there is a stuck switch or a short to ground in the wiring input to the memory seat module (MSM). DTC B2108 will set again if there is a short in the wiring or if there is an internal MSM problem. DTC B2108 will not set again if there is a stuck switch because the switch has been disconnected from the memory seat module (MSM) input.
3 Determines whether there is a short to ground in the input wiring to the MSM.
7 Clear all DTCs after the repair procedure is complete.