Power Lumbar With Cushion and Backrest Massage (14-Way Seat)
NOTE: Allow a few seconds for any switched lumbar or massage selection to activate.
NOTE: Lumbar air bladder deflation is normal before starting backrest massage.
The system contains the following serviceable components:
- Power lumbar with massage assembly, attached to each front seat backrest
- includes the lumbar control module, air pump, 3 inflatable air bladders and hoses
- Seat cushion massage assembly, attached to each front seat cushion
- includes 4 inflatable air bladders and hoses
- Seat control switch, attached to the cushion side shield
Vehicles equipped with front power lumbar and massage may also be referred to as a multi-contour seat or 14-way seat. The seat control switch commands the system.
Seat Control Switch with Power Lumbar and Massage
Item Description
1 Massage control button
2 Lumbar air bladder control button
3 Seat track control button
4 Recline control button
- Push button 1:
- forward for cushion massage or rearward for backrest massage
- either way to turn off the massage
- Push button 2:
- up or down to select top, middle or bottom lumbar air bladder
- forward to inflate or rearward to deflate a lumbar air bladder; hold the button until the desired pressure is reached (each bladder must be selected and inflated/deflated individually)
- forward or rearward while the cushion or backrest massage is on and the massage will turn off
- Push button 3:
- in any of 6 positions to adjust the seat track
- Push button 4:
- forward or rearward to adjust the backrest
When massage is selected, one bladder at a time inflates and deflates in the backrest or cushion. The backrest and cushion massage cannot operate at the same time. Backrest or cushion massage times out after 20 minutes.
When the backrest massage is turned off, the lumbar control will default to the middle bladder. If unsure which bladder is being controlled, 2 pushes up or down will always select the top or bottom bladder. The lumbar bladders can hold pressure while the cushion massage is on. After turning the backrest massage off, the pressure in each of the lumbar bladders will automatically return to their previous pressures before the massage was turned on, as long as voltage and ground remain at the module. Lumbar pressures will automatically reset after temperature fluctuations or when the vehicle has been turned off for a while.
When the backrest or cushion massage is on and the engine is turned off, the system will turn off and the module will not bleed off pressure in the bladders that are inflated. When the vehicle is turned on again, the Electronic Control Unit (ECU) defaults to off and deflates all bladders that were being used in the previous massage cycle. If the backrest massage was on when the engine was turned off, the pressure in each of the lumbar bladders will automatically return to their previous pressures before the massage was turned on.
When the cushion massage is turned off with the seat control switch, the bladders will deflate. The cushion bladders cannot be selected to hold pressure individually like the backrest bladders.
Refer to the Owner's Literature for additional information.
Power Lumbar With Cushion and Backrest Massage
Each front seat functions independently of each other. The lumbar control module is located in the seat backrest. The system will function only with the engine running. The lumbar control module does not report DTCs and does not communicate on the CAN . The button pushed on the seat control switch will determine what function the module will carry out. When an individual circuit is switched to voltage, the lumbar control module will carry out a function.
The pump supplies air pressure through a hose to the lumbar control module. The module then directs the air through multiple hoses to the appropriate cushion or backrest pillow.
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