Seat System: Other Chevrolet TrailBlazer I

Driver Seat With Memory Seat Module

For driver seat with memory seat module schematic refer to

1. «MEMORY SYSTEMS»(ref-154435-S27394356652003080900000) (TrailBlazer)
2. «MEMORY SYSTEMS»(ref-154349-S17629722142003080900000) (Envoy)
3. «MEMORY SYSTEMS»(ref-154440-S12771211072003080900000) (Envoy XL)
4. «MEMORY SYSTEMS»(ref-154411-S00141042782003080900000) (Bravada)

Driver Seat Without Memory or Heat

For driver seat without memory seat module schematic refer to

1. «POWER SEATS»(ref-154435-S10266667802003080900000) (TrailBlazer)
2. «POWER SEATS»(ref-154349-S20934190402003080900000) (Envoy)
3. «POWER SEATS»(ref-154440-S16233222542003080900000) (Envoy XL)
4. «POWER SEATS»(ref-154411-S26302706372003080900000) (Bravada)

Front Passenger Seat With Heat

For front passenger seat with heat schematic refer to

1. «POWER SEATS»(ref-154435-S10266667802003080900000) (TrailBlazer)
2. «POWER SEATS»(ref-154349-S20934190402003080900000) (Envoy)
3. «POWER SEATS»(ref-154440-S16233222542003080900000) (Envoy XL)
4. «POWER SEATS»(ref-154411-S26302706372003080900000) (Bravada)

Front Passenger Seat Without Heat

For front passenger seat without heat schematic refer to

1. «POWER SEATS»(ref-154435-S10266667802003080900000) (TrailBlazer)
2. «POWER SEATS»(ref-154349-S20934190402003080900000) (Envoy)
3. «POWER SEATS»(ref-154440-S16233222542003080900000) (Envoy XL)
4. «POWER SEATS»(ref-154411-S26302706372003080900000) (Bravada)

For driver seat with memory seat module schematic refer to

1. «MEMORY SYSTEMS»(ref-154435-S27394356652003080900000) (TrailBlazer)
2. «MEMORY SYSTEMS»(ref-154349-S17629722142003080900000) (Envoy)
3. «MEMORY SYSTEMS»(ref-154440-S12771211072003080900000) (Envoy XL)
4. «MEMORY SYSTEMS»(ref-154411-S00141042782003080900000) (Bravada)

For driver seat without memory or heat schematic refer to

1. «POWER SEATS»(ref-154435-S10266667802003080900000) (TrailBlazer)
2. «POWER SEATS»(ref-154349-S20934190402003080900000) (Envoy)
3. «POWER SEATS»(ref-154440-S16233222542003080900000) (Envoy XL)
4. «POWER SEATS»(ref-154411-S26302706372003080900000) (Bravada)

For front passenger seat with heat schematic refer to

1. «POWER SEATS»(ref-154435-S10266667802003080900000) (TrailBlazer)
2. «POWER SEATS»(ref-154349-S20934190402003080900000) (Envoy)
3. «POWER SEATS»(ref-154440-S16233222542003080900000) (Envoy XL)
4. «POWER SEATS»(ref-154411-S26302706372003080900000) (Bravada)

For front passenger seat without heat schematic refer to

1. «POWER SEATS»(ref-154435-S10266667802003080900000) (TrailBlazer)
2. «POWER SEATS»(ref-154349-S20934190402003080900000) (Envoy)
3. «POWER SEATS»(ref-154440-S16233222542003080900000) (Envoy XL)
4. «POWER SEATS»(ref-154411-S26302706372003080900000) (Bravada)

Driver Seat Module (DSM)

Battery Voltage: Displays the voltage of the battery positive supply circuit to the driver seat module.

Ignition Since Current DTC: Displays the number of ignition cycles on/off since the DTC set.

Seat Heat Zone: Displays the active seat heat zones. The scan tool will display Back Only when the heated seat back is operating in the low, medium, or high modes and the heated seat cushion is off. Back and Cushion will be displayed when both heater elements are operating in the low, medium, or high modes.

Seat Temp Setting: Displays the current status of the heated seat temperature setting during back only or back and cushion heating modes.

Recline Switch: Displays the current status of the seat recline adjuster switch forward, backward, or inactive.

Recliner Motor: Displays the current state of the recliner motor.

Horizontal Position Switch: Displays the current status of the seat horizontal adjuster switch forward, backward, or inactive.

Horizontal Motor: Displays the current state of the horizontal motor.

Rear Vertical Position Switch: Displays the current status of the seat rear vertical adjuster switch up, down, or inactive.

Rear Vertical Motor: Displays the current state of the rear vertical motor.

Front Vertical Position Switch: Displays the current status of the seat front vertical adjuster switch up, down, or inactive.

Front Vertical Motor: Displays the current state of the front vertical motor.

Lumbar/Bolster Switch: Displays the current status of the seat lumbar switch. The scan tool will display the direction that the lumbar switch is being operated.

Horizontal Lumbar Motor: Displays the current state of the horizontal lumbar motor.

Vertical Lumbar Motor: Displays the current state of the vertical lumbar motor.

Seat Heat Sensor Value: The scan tool displays the voltage level of the seat heat sensor signal circuit to the driver seat module. When the seat is cold the scan tool will display near 5 volts and as the seat temperature rises the signal voltage will decrease to near 0.0 volts.

Seat Horizontal Position: Displays 0 to 5 volts for the current position of the seat. When the driver seat is at the rearward stop the volts are near 0. As the driver seat is moved forward the voltage will increase until the forward stop is reached where the voltage will be near 5 volts.

Front Vertical Position: Displays 0 to 5 volts for the current position of the seat. When the front of the driver seat is at the down stop the volts are near 0. As the rear of the driver seat is raised the voltage will increase until the up stop is reached where the voltage will be near 5 volts.

Rear Vertical Position: Displays 0 to 5 volts for the current position of the seat. When the rear of the driver seat is at the down stop the volts are near 0. As the rear of the driver seat is raised the voltage will increase until the up stop is reached where the voltage will be near 5 volts.

Recline Position: Displays 0 to 5 volts for the current position of the seat. When the driver seat back is at the rearward stop the volts are near 0. As the driver seat back is moved forward the voltage will increase until the forward stop is reached where the voltage will be near 5 volts.

Horizontal Lumbar Position: Displays 0 to 5 volts for the current position of the lumbar support.

When the lumbar is at the rearward stop the volts are near 0. As the horizontal lumbar is moved forward the voltage will increase until the forward stop is reached where the voltage will be near 5 volts.

Vertical Lumbar Position: Displays 0 to 5 volts for the current position of the lumbar support. When the driver/passenger lumbar is at the rearward stop the volts are near 0. As the driver/passenger lumbar is moved forward the voltage will increase until the forward stop is reached where the voltage will be near 5 volts.

Last Memory Recall: Displays the current value in the driver seat module for the last memory button pressed.

Last Memory Set: Displays the current value in the driver seat module for the last memory setting.

Exit Recline Value: Displays the current value in the driver seat module for seat position when exiting the vehicle.

Exit Rear Vertical Value: Displays the current value in the driver seat module for seat position when exiting the vehicle.

Exit Front Vertical Value: Displays the current value in the driver seat module for seat position when exiting the vehicle.

Exit Horizontal Value: Displays the current value in the driver seat module for seat position when exiting the vehicle.

Exit Horizontal Lumbar Value: Displays the current value in the driver seat module for horizontal lumbar position when exiting the vehicle.

Exit Vertical Lumbar Value: Displays the current value in the driver seat module for vertical lumbar position when exiting the vehicle.

Mem 1 Recline Value: Displays the current value in the driver seat module for seat position when using the memory switch 1 to recall a set position.

Mem 2 Recline Value: Displays the current value in the driver seat module for seat position when using the memory switch 2 to recall a set position.

Mem 1 Horizontal Lumbar Value: Displays the current value in the driver seat module for horizontal lumbar position when using the memory switch 1 to recall a set position.

Mem 2 Horizontal Lumbar Value: Displays the current value in the driver seat module for horizontal lumbar position when using the memory switch 2 to recall a set position.

Mem 1 Vertical Lumbar Value: Displays the current value in the driver seat module for vertical lumbar position when using the memory switch 1 to recall a set position.

Mem 2 Vertical Lumbar Value: Displays the current value in the driver seat module for vertical lumbar position when using the memory switch 2 to recall a set position.

Mem 1 Horizontal Value: Displays the current value in the driver seat module for seat position when using the memory switch 1 to recall a set position.

Mem 2 Horizontal Value: Displays the current value in the driver seat module for seat position when using the memory switch 2 to recall a set position.

Mem 1 Rear Vertical Value: Displays the current value in the driver seat module for seat position when using the memory switch 1 to recall a set position.

Mem 2 Rear Vertical Value: Displays the current value in the driver seat module for seat position when using the memory switch 2 to recall a set position.

Mem 1 Front Vertical Value: Displays the current value in the driver seat module for seat position when using the memory switch 1 to recall a set position.

Mem 2 Front Vertical Value: Displays the current value in the driver seat module for seat position when using the memory switch 2 to recall a set position.

Julian Date of Build: The scan tool displays the date upon which the driver seat module (DSM) was manufactured.

Manufacture Enable Counter (MEC): The scan tool displays the actual value for the MEC in the DSM. This information is for the assembly plant only.

8 Digit GM Part Number: The scan tool displays the part number assigned to the DSM that is currently in the vehicle.

Year Module Built: The scan tool displays the year upon which the DSM was manufactured.

Software Revision Number: The scan tool displays the version of the software part number in the DSM.

Software Part Number: The scan tool displays the software identification number (ID) in the DSM.

Passenger Seat Module (PSM)

Battery Voltage: Displays the voltage of the battery positive supply circuit to the seat module.

Ignition Since Current DTC: Displays the number of ignition cycles on/off since the DTC set.

Seat Heat Zone: Displays the active seat heat zones. The scan tool will display Back Only when the heated seat back is operating in the low, medium, or high modes and the heated seat cushion is off. Back and Cushion will be displayed when both heater elements are operating in the low, medium, or high modes.

Seat Temp Setting: Displays current status of the heated seat temperature setting during back only or back and cushion heating modes.

Recline Switch: Displays current status of the seat recline adjuster switch forward, backward, or inactive.

Recliner Motor: Displays the current state of the recliner motor.

Horizontal Position Switch: Displays current status of the seat horizontal adjuster switch forward, backward, or inactive.

Horizontal Motor: Displays the current state of the horizontal motor.

Rear Vertical Position Switch: Displays current status of the seat rear vertical adjuster switch up, down, or inactive.

Rear Vertical Motor: Displays the current state of the rear vertical motor.

Front Vertical Position Switch: Displays current status of the seat front vertical adjuster switch up, down, or inactive.

Front Vertical Motor: Displays the current state of the front vertical motor.

Lumbar/Bolster Switch: Displays current status of the seat lumbar switch. The scan tool will display the direction that the lumbar switch is being operated.

Horizontal Lumbar Motor: Displays the current state of the horizontal lumbar motor.

Vertical Lumbar Motor: Displays the current state of the vertical lumbar motor.

Seat Heat Sensor Value: The scan tool displays the voltage level of the seat heat sensor signal circuit to the driver seat module. When the seat is cold the scan tool will display near 5 volts and as the seat temperature rises the signal voltage will decrease to near 0.0 volts.

Julian Date of Build: The scan tool displays the date upon which the seat module was manufactured.

Manufacture Enable Counter (MEC): The scan tool displays the actual value for the MEC in the seat module. This information is for the assembly plant only.

8 Digit GM Part Number: The scan tool displays the part number assigned to the seat module that is currently in the vehicle.

Year Module Built: The scan tool displays the year upon which the seat module was manufactured.

Software Revision Number: The scan tool displays the version of the software part number in the seat module.

Software Part Number: The scan tool displays the software identification number (ID) in the seat module.

Driver Door Module (DDM)

Heated Seat Switch: The scan tool displays the status of the heated seat back and cushion switch. While the heated seat back and cushion switch is being pressed the scan tool will display Active, and when it is released the scan tool will display Inactive.

Heat Indicator Low: The scan tool displays the current status of the low heat indicator.

Heat Indicator Medium: The scan tool displays the current status of the medium heat indicator.

Heat Indicator High: The scan tool displays the current status of the high heat indicator.

Back Only Heat Indicator: The scan tool displays the current status of the heated seat back indicator.

Back Only Heat Switch: The scan tool displays the status of the heated seat back switch. While the heated seat back switch is being pressed the scan tool will display Active, and when it is released the scan tool will display Inactive.

Memory Switch: The scan tool displays the status of the memory switch. While the 1 or 2 switches are being pressed the scan tool will display Memory 1 or Memory 2 and when both switches are in an inactive state the scan tool will display Idle.

Passenger Door Module (PDM)

Heated Seat Switch: The scan tool displays the status of the heated seat back and cushion switch. While the heated seat back and cushion switch is being pressed the scan tool will display Active, and when it is released the scan tool will display Inactive.

Heat Indicator Low: The scan tool displays the current status of the low heat indicator.

Heat Indicator Medium: The scan tool displays the current status of the medium heat indicator.

Heat Indicator High: The scan tool displays the current status of the high heat indicator.

Back Only Heat Indicator: The scan tool displays the current status of the heated seat back indicator.

Back Only Heat Mode: The scan tool displays the status of the heated seat back switch. While the heated seat back switch is being pressed the scan tool will display Active, and when it is released the scan tool will display Inactive.

Scheme 81

Intermittent

Faulty electrical connections or wiring may be the cause of intermittent conditions. Refer to TESTING FOR INTERMITTENT AND POOR CONNECTIONS in Wiring Systems.

A51 Power Seats

Battery voltage is supplied to the power seat switch through the power seat circuit breaker. While the seat adjuster switches are in an inactive state the switch contacts are closed to the power seat switch ground circuit, When a power seat switch is pressed to an active state the switch contact is closed to the battery voltage supply circuit. Each seat adjuster motor is controlled by the power seat switch through 2 motor control circuits. The seat adjuster motors are bidirectional and the direction of adjuster motor rotation is determined by which of the adjuster motor control circuits is switched to battery voltage while the other remains grounded.

AR9 Front Passenger Seat

Battery voltage is supplied to the passenger seat module through the power seat circuit breaker. The passenger seat module supplies the seat adjuster switch assembly with a battery positive reference voltage. While the seat adjuster switches are in an inactive state the switch contacts are closed to the adjuster switch ground circuit. When a seat adjuster switch is pressed to an active state the switch contact is closed to the reference voltage circuit. Battery voltage on a switch signal circuit indicates to the seat module the switch status is active. Each seat adjuster motor is controlled by the seat module through 2 motor control circuits. While the seat adjuster motors are in an inactive state the motor control circuits are closed to ground circuit contacts within the seat module. The seat module operates the seat adjuster motors by switching one of a motor's control circuits to battery voltage. The seat adjuster motors are bidirectional and the direction of adjuster motor rotation is determined by which of the adjuster motor control circuits is switched to battery voltage while the other remains grounded.

Lumbar Support System Components

The lumbar support system for the driver and passenger seat consists of the following components

1. Lumbar Switch
2. Seat Lumbar Motor Assembly
3. Driver Seat Module
4. Passenger Seat Module
5. Seat Circuit Breaker

Heated Seats System Components

The heated seats system for the driver and passenger seat consists of the following components

1. Driver and passenger door modules
2. Driver and passenger heated seat switches
3. Driver and passenger seat back heater elements
4. Driver and passenger seat back heat sensors
5. Driver and passenger seat cushion heater elements
6. Driver seat module
7. Passenger seat module