B2104

Diagnostic Trouble Code Chart:

Wiring Schematic:

CIRCUIT DESCRIPTION
The Memory Seat Module (MSM) receives an input from the left seat switch rear vertical switch when the switch is actuated. When the rear vertical switch is operated in the up direction, battery positive voltage (B+) is supplied to the MSM rear vertical up input via CKT 1519 (YEL). The MSM recognizes the input and tilts the rear of the seat in the up direction.

CONDITIONS FOR SETTING THE DTC
^ When the rear vertical up switch is active for 30 seconds after motion has ceased, the switch is considered shorted and the DTC sets.
^ If the seat rear vertical position sensor DTC B2116 is current and the rear vertical up switch is active for 30 seconds, the switch is considered shorted and the DTC sets.
^ DTC B2104 sets only if DTC B1982 MSM or DTC B1983 MSM is not current.

ACTION TAKEN WHEN THE DTC SETS
^ The MSM does not tilt the rear of the seat in the up direction.
^ The MSM continues responding to valid inputs from the other manual switches.
^ All memory recall function commands are ignored for all directions.

CONDITIONS FOR CLEARING THE DTC
^ The MSM sees that the rear vertical up switch is no longer active.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 battery positive voltage (B+) in the wiring input to the MSM. DTC B2104 will set again if there is a short in the wiring or there is an internal MSM problem. DTC B2104 will not set again if there is a stuck switch because the switch has been disconnected from the MSM input.
3. Determines whether there is a short to battery positive voltage (B+) in the input wiring to the MSM.
7. Clear all DTCs after the repair procedure is complete.