Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
Driving Position Memory System Input Test And Function Test
1. Connect the HDS to the data link connector (DLC)
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 DTCs using B-CAN System Diagnosis Test Mode A - Refer to: Body Electrical Troubleshooting - B-CAN System Diagnosis Test Mode A - Initial Communication and DTC Checks .
- 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.
5. 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 7.
- If the data list indication is not correct, do the appropriate test at the control unit and terminal indicated in the table.
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- 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 the 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 |
|---|---|---|---|
| Power Switch for Power Seat Control | Turn the vehicle to the ON mode Turn the vehicle to the OFF (LOCK) mode |
Power seat control unit/B13 Turn the vehicle to the ON mode: 12V Turn the vehicle to the OF (LOCK) mode: 0V |
|
| ATP Switch | Transmission range switch P position: ON Any other position than P: OFF |
Power seat control unit/B1 Transmission range switch P: 0 V Any other position than P: 12 V |
|
| Slide Sensor | Seat moving forward or backward: ON Seat not moving: OFF |
Power seat control unit/B8 Pulses as seat moves: 2.5 V average |
|
| Front Up-Down Sensor | Seat front moving up/down: ON Seat not moving: OFF |
Power seat control unit/B7 Pulses as seat moves: 2.5 V average |
|
| Recline Sensor | Seat-back moving forward or backward: ON Seat not moving: OFF |
Power seat control unit/B10 Pulses as seat moves: 2.5 V average |
|
| Rear Up-Down Sensor | Seat rear moving up/down: ON Seat not moving: OFF |
Power seat control unit/B9 Pulses as seat moves: 2.5 V average |
|
6. Exit the DATA LIST and select FUNCTIONAL TESTS.
7. 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 | Power seat control unit/A1, A2, A3, A6 Disconnect power seat control unit connectors A and B. Connect A1 to A2 and A3 to A6; driver's seat should slide forward. |
|
| Power Seat: Slide Motor-Full Rearward |
Seat slides backward | Power seat control unit/A1, A2, A3, A6 Disconnect power seat control unit connectors A and B. Connect A1 to A6 and A2 to A3; driver's seat should slide backward. |
|
| Power Seat: Front Up-Down Motor-Full Up |
Front of seat moves up | Power seat control unit/A2, A6, A7, A10 Disconnect power seat control unit connectors A and B. Connect A6 to A10 and A2 to A7; front of driver's seat should move up. |
|
| Power Seat: Front Up-Down Motor-Full Down |
Front of seat moves down | Power seat control unit/A2, A6, A7, A10 Disconnect power seat control unit connectors A and B. Connect A6 to A7 and A2 to A10; front of driver's seat should move down. |
|
| Power Seat: Rear Up-Down Motor-Full Up |
Rear of seat moves up | Power seat control unit/A4, A5, A9, A12 Disconnect power seat control unit connectors A and B. Connect A9 to A12 and A4 to A5; rear of driver's seat should move up. |
|
| Power Seat: Rear Up-Down Motor-Full Down |
Rear of seat moves down | Power seat control unit/A4, A5, A9, A12 Disconnect power seat control unit connectors A and B. Connect A4 to A12 and A5 to A9; rear of driver's seat should move down. |
|
| Power Seat: Recline Motor-Full Forward |
Seat-back moves forward | Power seat control unit/A5, A8, A11, A12 Disconnect power seat control unit connectors A and B. Connect A8 to A12 and A5 to A11; driver's seat-back should move forward. |
|
| Power Seat: Recline Motor-Full Rearward |
Seat-back moves backward | Power seat control unit/A5, A8, A11, A12 Disconnect power seat control unit connectors A and B. Connect A11 to A12 and A5 to A8; driver's seat-back should move backward. |
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.