Test J: The Memory Seat Does Not Operate Correctly - Does Not Operate Using The Memory Set Switch
PINPOINT TEST J: THE MEMORY SEAT DOES NOT OPERATE CORRECTLY - DOES NOT OPERATE USING THE MEMORY SET SWITCHNormal Operation
The driver seat control switch is powered by battery voltage on circuit SBP01 (RD) and is supplied ground on circuit GD133 (BK). When pressed, the seat control switch supplies the voltage and ground to the applicable driver seat module (DSM) inputs. The DSM then supplies voltage and ground to the appropriate power seat track motor or power recline motor based on the inputs received from the seat control switch. When pressed in the opposite direction, the seat control switch reverses the polarity to the DSM inputs, and the DSM likewise reverses polarity of the appropriate power seat track motor or power recliner motor circuits causing the seat or backrest to move in the opposite direction. There are 3 power seat track motors that combine to move the seat horizontally (forward/rearward) and vertically (front up/down and rear up/down). The seat backrest power recliner mechanism uses a single motor to move the seat backrest forward and rearward.
Battery voltage is also supplied to DSM on circuit SBP01 (RD) and SBB14 (BN/RD). Ground is supplied to the DSM on circuits GD133 (BK) and GD143 (BK/OG).
Each motor, in the memory power seat track and power recliner mechanism contains a Hall-effect position sensor. The DSM supplies a signal feed circuit to each position sensor and a shared reference signal return circuit. Each position sensor sends a signal voltage back to the DSM used to monitor the position of the power seat and seat backrest. The DSM uses this information to return the seat to a stored pre-programmed position when pressing the memory SET switch or a remote entry transmitter. Refer to Principles of Operation or the Owner's Literature for information on programming the DSM for storing memory seat positions. Principles of Operation
The following pinpoint test diagnoses a memory seat that does not operate correctly using the memory SET switch. If the memory seat does not move in all directions using the seat control switch, GO to Pinpoint Test I. Test I: The Memory Seat Is Inoperative/Does Not Operate Correctly - Does Not Operate Horizontally/Vertically/Recline
This pinpoint test is intended to diagnose the following:
- Wiring, terminals or connectors
- Memory SET switch
- Missing status information (controller area network [CAN] communication bus message):
- ignition switch status
- gear selector position
- Remote entry transmitter
- Memory power seat track
- Recliner mechanism
- DSM
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