Driving Position Memory System Input Test and Function Test

1. Connect the HDS to the data link connector (DLC) - Refer to: How to Troubleshoot the Body Electrical (2022 - 2023) or How to Troubleshoot the Body Electrical (2019 - 2021) .

2. Turn the vehicle to the ON mode.

3. From the BODY ELECTRICAL SYSTEM SELECTION menu, select POWER SEAT/POWER MIRROR, then DTCs.

• If DTCs are found, troubleshoot the indicated DTCs.
• If no DTCs are found, go to step 4.

4. Exit the DTC mode, and select the DATA LIST from the POWER SEAT/POWER MIRROR TEST MODE MENU.Test each input and monitor each output under the condition shown below:

• If the data list indication is correct, continue to the next switch. If all switches are OK, go to step 6.
• If the data list indication is not correct, do the appropriate test at the control unit and terminal indicated in the table.
  • Voltage drop tests should be done with the vehicle in the ON mode, and all connectors connected and the meter negative test lead attached to a good body ground, unless specified otherwise.
  • Continuity tests should be done with vehicle in the OFF (LOCK) mode, and indicated terminals disconnected.

Data List Input/Command	Condition: Data List Indication	Control Unit/Terminal Number/Test (If applicable)	Possible cause if desired result is not obtained
Ignition Switch for Power Seat Control	Vehicle ON mode: ON Vehicle OFF (LOCK) mode: OFF	Driver's power seat control unit/A40 Vehicle ON mode: 12 VVehicle OFF (LOCK) mode: 0 V	Blown No. C15 fuse Faulty control unit An open or high resistance in the wire A short in the wire
ATP Switch	Shift position/mode P: ON Any other position/mode than P: OFF	Driver's power seat control unit/A1 Shift position/mode P: 0 V Any other position/mode than P: 12 V	Faulty control unit Faulty TCM An open or high resistance in the wire A short in the wire
Slide Sensor	Seat moving forward or backward: ON Seat not moving: OFF	Driver's power seat control unit/A9 Pulses as seat moves: 2.5 V average	Faulty control unit Faulty sensor An open or high resistance in the wire A short in the wire
Front UP-DOWN (tilt) Sensor	Seat front moving up/down: ON Seat not moving: OFF	Driver's power seat control unit/A12 Pulses as seat moves: 2.5 V average	Faulty control unit Faulty sensor An open or high resistance in the wire A short in the wire
Recline Sensor	Seat-back moving forward or backward: ON Seat not moving: OFF	Driver's power seat control unit/A10 Pulses as seat moves: 2.5 V average	Faulty control unit Faulty sensor An open or high resistance in the wire A short in the wire
Rear UP-DOWN (height) Sensor	Seat moving up/down: ON Seat not moving: OFF	Driver's power seat control unit/A11 Pulses as seat moves: 2.5 V average	Faulty control unit Faulty sensor An open or high resistance in the wire A short in the wire
Lumbar Support Motor A Pulse	Power lumbar support moving up/down: ON Power lumbar support not moving: OFF	Driver's power seat control unit/A13 Pulses as seat moves: 2.5 V average	Faulty motor An open or high resistance in the wire A short in the wire
Lumbar Support Motor B Pulse	Power lumbar support moving forward or backward: ON Power lumbar support not moving: OFF	Driver's power seat control unit/A14 Pulses as seat moves: 2.5 V average	Faulty motor An open or high resistance in the wire A short in the wire
Left Bolster Motor	Left bolster moving forward or backward: ON Seat not moving: OFF	Driver's power seat control unit/A17 Pulses as seat moves: 2.5 V average	Faulty motor An open or high resistance in the wire A short in the wire
Right Bolster Motor	Right bolster moving forward or backward: ON Seat not moving: OFF	Driver's power seat control unit/A16 Pulses as seat moves: 2.5 V average	Faulty motor An open or high resistance in the wire A short in the wire
Thigh Support Motor Pulse	Power thigh support moving forward or backward: ON Seat not moving: OFF	Driver's power seat control unit/A15 Pulses as seat moves: 2.5 V average	Faulty motor An open or high resistance in the wire A short in the wire

6. Exit the DATA LIST and select FUNCTIONAL TESTS.Do each of the function tests listed in the table shown. The appropriate output should occur.

• If the function operates normally, go to the next function test. If all function tests operate normally, the system is OK.
• If the function does not occur, do the appropriate test at the control unit and terminal indicated in the table.
  • Voltage drop tests should be done with the vehicle in the ON mode, and all connectors connected.
  • Continuity tests should be done with the vehicle in the OFF (LOCK) mode, and indicated terminals disconnected.
  • Jumper tests should be done according to the instructions indicated.
• If the test indicates that the component operates normally, but the function will not operate by doing the function test or normal use of the component, the control unit that operates that function must be faulty; replace it.
• If the test indicates that the component does not operate normally, check for an open or short in the harnesses between the component and the control unit. If the harness is OK, replace the component.

Function Test	Component and Operation	Control Unit/Terminal Number/Test (If applicable)	Possible cause if desired result is not obtained
Power Seat:Slide Motor - Full Forward	Seat slides forward	Driver's power seat control unit/C1, C6, C2, C4 Disconnect driver's power seat control unit connectors A, B, and C. Connect C1 to C2 and C6 to C4; driver's seat should slide forward.	Faulty motor An open or high resistance in the wire A short in the wire
Power Seat: Slide Motor - Full Rearward	Seat slides backward	Driver's power seat control unit/C1, C6, C2, C4 Disconnect driver's power seat control unit connectors A, B, and C. Connect C1 to C4 and C6 to C2; driver's seat should slide backward.	Faulty motor An open or high resistance in the wire A short in the wire
Power Seat: Tilt Motor-Full Up	Front of seat moves up	Driver's power seat control unit/B2, B4, B3, B1 Disconnect driver's power seat control unit connectors A, B, and C. Connect B2 to B3 and B4 to B1; front of driver's seat should move up.	Faulty motor An open or high resistance in the wire A short in the wire
Power Seat: Tilt Motor - Full Down	Front of seat moves down	Driver's power seat control unit/B2, B4, B3, B1 Disconnect driver's power seat control unit connectors A, B, and C. Connect B2 to B1 and B4 to B3; front of driver's seat should move down.	Faulty motor An open or high resistance in the wire A short in the wire
Power Seat: Recline Motor - Full Forward	Seat-back moves forward	Driver's power seat control unit/B2, B4, C10, C9 Disconnect driver's power seat control unit connectors A, B, and C. Connect B2 to C10 and B4 to C9; driver's seat-back should move forward.	Faulty motor An open or high resistance in the wire A short in the wire
Power Seat: Recline Motor - Full Rearward	Seat-back moves backward	Driver's power seat control unit / B2, B4, C10, C9 Disconnect driver's power seat control unit connectors A, B, and C. Connect B2 to C9 and B4 to C10; driver's seat-back should move backward.	Faulty motor An open or high resistance in the wire A short in the wire
Power Seat: Height Motor - Full Up	Seat moves up	Driver's power seat control unit / C5, C3, C7, C8 Disconnect driver's power seat control unit connectors A, B, and C. Connect C5 to C8 and C3 to C7; driver's seat should move up.	Faulty motor An open or high resistance in the wire A short in the wire
Power Seat:Height Motor - Full Down	Seat moves down	Driver's power seat control unit / C5, C3, C7, C8Disconnect driver's power seat control unit connectors A, B, and C.Connect C5 to C7 and C3 to C8; driver's seat should move down.	Faulty motor An open or high resistance in the wire A short in the wire
Power Lumbar Support: Lumbar Support Motor A-Full Up	Power lumbar support moves up	Driver's power seat control unit / B2, B4, B15, B5Disconnect driver's power seat control unit connectors A, B, and C. Connect B2 to B15 and B4 to B5; power lumbar support should move up.	Faulty motor An open or high resistance in the wire A short in the wire
Power Lumbar Support: Lumbar Support Motor A-Full Down	Power lumbar support moves down	Driver's power seat control unit / B2, B4, B15, B5Disconnect driver's power seat control unit connectors A, B, and C. Connect B2 to B5 and B4 to B15; power lumbar support should move down.	Faulty motor An open or high resistance in the wire A short in the wire
Power Lumbar Support:Lumbar Support Motor B - Full Forward	Power lumbar support moves forward	Driver's power seat control unit / B2, B4, B16, B8 Disconnect driver's power seat control unit connectors A, B, and C. Connect B2 to B16 and B4 to B8; power lumbar support should move forward.	Faulty motor An open or high resistance in the wire A short in the wire
Power Lumbar Support: Lumbar Support Motor B - Full Backward	Power lumbar support moves backward	Driver's power seat control unit / B2, B4, B16, B8 Disconnect driver's power seat control unit connectors A, B, and C. Connect B2 to B8 and B4 to B16; power lumbar support should move backward.	Faulty motor An open or high resistance in the wire A short in the wire
Left Bolster Motor - Full Forward	Left bolster motor moves forward	Driver's power seat control unit / B2, B4, B17, B18 Disconnect driver's power seat control unit connectors A, B, and C. Connect B2 to B17 and B4 to B18; power lumbar support should move forward.	Faulty motor An open or high resistance in the wire A short in the wire
Left Bolster Motor - Full Backward	Left bolster motor moves backward	Driver's power seat control unit / B2, B4, B17, B18 Disconnect driver's power seat control unit connectors A, B, and C. Connect B2 to B18 and B4 to B17; power lumbar support should move backward.	Faulty motor An open or high resistance in the wire A short in the wire
Right bolster motor - Full Forward	Right bolster motor moves forward	Driver's power seat control unit / B2, B4, B11, B19 Disconnect driver's power seat control unit connectors A, B, and C. Connect B2 to B11 and B4 to B19; power lumbar support should move forward.	Faulty motor An open or high resistance in the wire A short in the wire
Right Bolster Motor - Full Backward	Right bolster motor moves backward	Driver's power seat control unit/B2, B4, B11, B19 Disconnect driver's power seat control unit connectors A, B, and C. Connect B2 to B19 and B4 to B11; power lumbar support should move backward.	Faulty motor An open or high resistance in the wire A short in the wire
Power Thigh Support Motor - Full Forward	Power thigh support motor moves forward	Driver's power seat control unit / B2, B4, B10, B9 Disconnect driver's power seat control unit connectors A, B, and C. Connect B2 to B10 and B4 to B9; power lumbar support should move forward.	Faulty motor An open or high resistance in the wire A short in the wire
Power Thigh Support Motor - Full Backward	Power thigh support motor moves backward	Driver's power seat control unit/B2, B4, B10, B9 Disconnect driver's power seat control unit connectors A, B, and C. Connect B2 to B9 and B4 to B10; power lumbar support should move backward.	Faulty motor An open or high resistance in the wire A short in the wire