Test L: The Memory Seat Does Not Operate Correctly - Does Not Operate Using The Memory SET Switch
PINPOINT TEST L: 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 SBP12 (GN/RD) and is supplied ground on circuit GD147 (BK/VT). 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 SBB32 (VT/RD) and SBP12 (GN/RD). Ground is supplied to the DSM on circuit GD147 (BK/VT).
Each motor, in the memory power seat track and power recliner mechanism contains a Hall-effect position sensor. The DSM supplies a shared signal feed circuit to each position sensor. Each position sensor sends a signal pulse 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. For information on programming memory position or recalling a stored memory position, refer to Memory Position Programming. Programming and Relearning
The following pinpoint test diagnoses a memory seat that does not operate correctly using the memory SET switch or operates in 1-second intervals. If the memory seat does not move in all directions using the seat control switch, GO to Pinpoint Test K. Test K: The Memory Seat Is Inoperative/Does Not Operate Correctly - Does Not Operate Horizontally/Vertically/Recline
This pinpoint test is intended to diagnose the following:
- Fuse
- Wiring, terminals or connectors
- Remote keyless entry (RKE) transmitter
- Memory SET switch
- Missing status information (controller area network [CAN] communication bus messages):
- Ignition switch status
- Gear selector position
- Seat track
- Power recliner mechanism
- DSM
L1-L2:
L3-L5:
L5-L6:
L7-L8:
L8-L9:
L10-L12:
L12-L14:
L14-L15:
L16-L17:
L18-L20:
L20-L21:
L22:
