B1755

CIRCUIT DESCRIPTION
When the power seat switches are pressed they send a 12 V signal to the memory seat module (MSM). The MSM commands the driver seat to move in response to the switch inputs.

CONDITIONS FOR RUNNING THE DTC
The MSM must be powered and can not have DTC B1327 Battery Positive Low as an active DTC for this DTC to set.

CONDITIONS FOR SETTING THE DTC
^ If a seat switch circuit continues to be active for 30 seconds after a motor controlled by that switch reaches the end of its travel, the switch will be considered shorted and the MSM will set the DTC.
^ It a position sensor DTC is current and the associated switch is active for 30 continuous seconds, the switch will be considered shorted and the MSM will set a switch DTC.
^ A switch DTC will not set if DTC B1327 or B1328 is current.

ACTION TAKEN WHEN THE DTC SETS
^ A motor output driven in response to a switch considered failed, is deactivated for both directions.
^ All memory recall commands are ignored.
^ The MSM will respond to any other switch input that has not set a DTC.

CONDITIONS FOR CLEARING THE DTC
The DTC automatically clears when the switch circuit setting the DTC is no longer active.

TEST DESCRIPTION

Steps 1-10:

The numbers below refer to the step numbers on the diagnostic table.
2. Checks the existing state of the driver's seat or lumbar switch by using the current state of the parameter. If all of the seat switch parameters display active, possibly one of the seat or lumbar switch input circuits is shorted to voltage.
4. When the seal or lumbar switch is disconnected, this step determines if the switch contacts are stuck closed, or if one of the switch signal circuits is possibly shorted to battery positive voltage.