Driving Position Memory System Input Test and Function Test (2020 2021 2022 2023 2024 2025)
- Before testing, check for DTCs. If any DTCs are indicated, troubleshoot those DTCs first.
- If you are troubleshooting multiple DTCs, be sure to follow the instructions in B-CAN System Diagnosis Test Mode A .
- Before testing, make sure the fuses and relays associated with the system are OK.
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.
4. 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 6.
- 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.
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Continuity tests should be done with vehicle in the OFF (LOCK) mode, and indicated terminals disconnected.
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| 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 |
Power seat control unit/A13 Vehicle ON mode: 12 V Vehicle OFF (LOCK) mode: 0 V |
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| ATP Switch | Shift position/mode P: ON Any other position/mode than P: OFF |
Power seat control unit/A1 Shift position/mode P: 0 V Any other position/mode than P: 12 V |
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| Slide Sensor | Seat moving forward or backward: ON Seat not moving: OFF |
Power seat control unit/A8 Pulses as seat moves: 2.5 V average |
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| Front Up-Down Sensor | Seat front moving up/down: ON Seat not moving: OFF |
Power seat control unit/A7 Pulses as seat moves: 2.5 V average |
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| Recline Sensor | Seat-back moving forward or backward: ON Seat not moving: OFF Pulses as seat moves: 2.5 V average |
Power seat control unit/A10 |
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| Data List Input/Command | Condition: Data List Indication | Control Unit/Terminal Number/Test (If applicable) | Possible cause if desired result is not obtained |
|---|---|---|---|
| Rear Up-Down Sensor | Seat rear moving up/down: ON Seat not moving: OFF |
Power seat control unit/A9 Pulses as seat moves: 2.5 V average |
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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.
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Voltage drop tests should be done with the vehicle in the ON mode, and all connectors connected.
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Continuity tests should be done with the vehicle in the OFF (LOCK) mode, and indicated terminals disconnected.
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Jumper tests should be done according to the instructions indicated.
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- 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/B6, B2, B3, B1 Disconnect power seat control unit connectors A and B. Connect B6 to B3 and B1 to B2; driver's seat should slide forward. |
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| Power Seat: Slide Motor-Full Rearward | Seat slides backward | Power seat control unit/B6, B2, B3, B1 Disconnect power seat control unit connectors A and B. Connect B6 to B1 and B3 to B2; driver's seat should slide backward. |
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| Power Seat: Front Up-Down Motor-Full Up | Front of seat moves up | Power seat control unit/B6, B2, B10, B7 Disconnect power seat control unit connectors A and B. Connect B6 to B10 and B7 to B2; front of driver's seat should move up. |
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| Power Seat: Front Up-Down Motor-Full Down | Front of seat moves down | Power seat control unit/B6, B2, B10, B7 Disconnect power seat control unit connectors A and B. Connect B6 to B7 and B10 to B2; front of driver's seat should move down. |
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| Function Test | Component and Operation | Control Unit/Terminal Number/Test (If applicable) | Possible cause if desired result is not obtained |
|---|---|---|---|
| Power Seat: Rear Up-Down Motor-Full Up | Rear of seat moves up | Power seat control unit/B12, B5, B9, B4 Disconnect power seat control unit connectors A and B. Connect B12 to B9 and B4 to B5; rear of driver's seat should move up. |
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| Power Seat: Rear Up-DownMotor-Full Down | Rear of seat moves down | Power seat control unit/B12, B5, B9, B4 Disconnect power seat control unit connectors A and B. Connect B12 to B4 and B9 to B5; rear of driver's seat should move down. |
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| Power Seat: Recline Motor-Full Forward | Seat-back moves forward | Power seat control unit/B12, B5, B9, B4 Disconnect power seat control unit connectors A and B. Connect B12 to B8 and B11 to B5; driver's seat-back should move forward. |
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| Power Seat: Recline Motor-Full Rearward | Seat-back moves backward | Power seat control unit/B12, B5, B8, B11 Disconnect power seat control unit connectors A and B. Connect B12 to B11 and B8 to B5; driver's seat-back should move backward. |
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