Scheme 105
Scheme 105: Heated/Cooled Seat Schematics
Scheme 106
Scheme 107
Scheme 107: Heated/Cooled Seat Component Views
| Callout | Component Name |
|---|
| 1 | Window Lockout Switch |
| 2 | Passenger Window Switch |
| 3 | Right Rear Window Switch |
| 4 | Door Lock Switch - Driver |
| 5 | Memory Seat Switch - Driver |
| 6 | Heated Seat Switch - Driver |
| 7 | Left Rear Window Switch |
| 8 | Driver Window Switch |
Scheme 108
| Callout | Component Name |
|---|
| 1 | Memory Seat Module - Driver |
| 2 | Heated Seat Element Connector - Driver Cushion |
| 3 | Seat Belt Switch Connector - Driver |
Scheme 109
| Callout | Component Name |
|---|
| 1 | Lumbar Horizontal Motor - Driver |
| 2 | Heated Seat Element Connector - Driver Back |
| 3 | Lumbar Horizontal Position Sensor - Driver |
| 4 | Seat Belt Pretensioner - Left |
Scheme 110
| Callout | Component Name |
|---|
| 1 | Window Switch - Passenger |
| 2 | Door Lock switch - Passenger |
| 3 | Heated Seat Switch - Passenger |
Scheme 111
| Callout | Component Name |
|---|
| 1 | Seat Belt Switch Connector - Passenger |
| 2 | Inflatable Restraint Front Passenger Presence System (PPS) Sensor |
| 3 | Inflatable Restraint Front Passenger Presence System (PPS) Module |
| 4 | Heated Seat Element Connector - Passenger Cushion |
Scheme 112
| Callout | Component Name |
|---|
| 1 | Lumbar Horizontal Motor - Passenger |
| 2 | Seat Belt Pretensioner - Right |
| 3 | Heated Seat Element Connector - Passenger Back |
Scheme 113
Scheme 113: Heated Seat Element - Driver Back
| Connector Part Information OEM: 15419810 Service: 12085536 Description: 4-Way M Metri-Pack 150 Series (BK) |
|---|
| Terminal Part Information Pins: A-B Terminal/Tray: 12047581/2 Core/Insulation Crimp: E/A Release Tool/Test Probe: 12094429/J-35616-3 (GY) Pins: C-D Terminal/Tray: 12059894/5 Core/Insulation Crimp: See Terminal Repair Kit Release Tool/Test Probe: See Terminal Repair Kit |
Heated Seat Element - Driver Back Connector Parts Information
| Pin | Wire Color | Circuit No. | Function |
|---|
| A | RD/WH | 2078 | Heated Seat Cushion Element Control |
| B | BN | 2432 | Heated Seat Back Element Supply Voltage |
| C | YE/BK | 2079 | Heated Seat Cushion Temperature Sensor Signal |
| D | YE | 2080 | Low Reference |
Heated Seat Element - Driver Back Connector Terminal Identification
Scheme 114
Scheme 114: Heated Seat Element - Driver Cushion
| Connector Part Information OEM: 12064778 Service: 12126020 Description: 2-Way M Metri-Pack 150 Series Unsealed (L-GN) |
|---|
| Terminal Part Information Terminal/Tray: 12047581/2 Core/Insulation Crimp: E/A Release Tool/Test Probe: 12094429/J-35616-3 (GY) |
Heated Seat Element - Driver Cushion Connector Part Information
| Pin | Wire Color | Circuit No. | Function |
|---|
| A | RD/WH | 2078 | Heated Seat Cushion Element Control |
| B | L-GN | 2077 | Heated Seat Cushion Element Supply Voltage |
Heated Seat Element - Driver Cushion Connector Terminal Identification
Heated Seats System Operation
The driver and passenger heated seats have 2 heat zone operating modes with 3 heat level modes and will operate only while the engine is running. The heat zones are determined by which of the 2 heated seat buttons are pressed, while the heat level is determined by the number of times they are pressed. Pressing the seat cushion button 1 time will activate the seat back and cushion heater elements in the high mode. Each time the seat cushion button is pressed the seat back and cushion heat level is reduced from high to medium, low, and off. Pressing the heated seat back button 1 time will activate only the seat back heater element in the high mode. Each time the seat back button is pressed the seat back heat level is reduced from high to medium, low, and off. During heated seat operation the heat zone operating mode may be changed without affecting the current heat level mode.
The heated seat switches are momentary contact switches and are inputs to the driver and passenger door modules. Battery voltage is supplied to the switch assembly from the door module, and when a heated seat switch is pressed and released a brief switch signal voltage is supplied to the door module. Whenever the door module receives an active heated seat switch input, the next heated seat operating mode is determined by whatever the current mode may be. The seat heater elements are controlled by the driver seat module using inputs from the door modules through Class 2 serial data circuit messages. The driver seat module controls the voltage supply and the ground circuits to the seat heater elements. When a heated seat function is commanded active, the seat module will switch battery voltage to the heater element supply circuits, and the ground circuits are pulse width modulated low side drive control circuits. During heated seat operation both the seat back and cushion heater elements are supplied battery voltage. The seat module grounds the appropriate control circuits for back only or back and cushion heating modes, and opens or closes the active control circuits as necessary in order to maintain the desired seat temperature. The seat module relies on inputs from thermistors located in the driver and passenger seat backs to control heated seat temperatures. The thermistors are 2 wire sensors supplied with a 5-volt referenced signal circuit and a low reference circuit from the seat module. Resistance through the thermistors varies with temperature causing the heated seat sensor signal circuit voltage levels to decrease as the seat back temperatures rise. The driver seat module will allow heated seat operation only while the engine is running which is determined by a Class 2 serial data circuit message from the powertrain control module.
