System Input Test and Function Test
- Connect the HDS to the data link connector (DLC).
- Turn the ignition switch to ON (II), or press the engine start/stop button to select the ON mode.
- 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 (see TROUBLESHOOTING - B-CAN SYSTEM DIAGNOSIS TEST MODE A ).
- If no DTCs are found, go to step 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 ignition switch in ON (II) or the vehicle ignition 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 ignition switch in LOCK (0) or the vehicle ignition in the OFF 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 Slide Switch Forward Slide switch forward: ON
Switch released: OFFPower seat control unit/B1, B7 Slide switch forward: 0 V Switch released: 5 V - Faulty control unit
- Faulty switch (see POWER SEAT ADJUSTMENT SWITCH TEST/REPLACEMENT )
- An open or high resistance in the wire
- A short in the wire
Slide Switch Backward Slide switch backward: ON
Switch released: OFFPower seat control unit/B1, B24 Slide switch backward: 0 V Switch released: 5 V - Faulty control unit
- Faulty switch (see POWER SEAT ADJUSTMENT SWITCH TEST/REPLACEMENT )
- An open or high resistance in the wire
- A short in the wire
Recline Switch Forward Recline switch forward: ON
Switch released: OFFPower seat control unit/B1, B6 Recline switch forward: 0 V Switch released: 5 V - Faulty control unit
- Faulty switch (see POWER SEAT ADJUSTMENT SWITCH TEST/REPLACEMENT )
- An open or high resistance in the wire
- A short in the wire
Recline Switch Backward Recline switch backward: ON
Switch released: OFFPower seat control unit/B1, B23 Recline switch backward: 0 V Switch released: 5 V - Faulty control unit
- Faulty switch (see POWER SEAT ADJUSTMENT SWITCH TEST/REPLACEMENT )
- An open or high resistance in the wire
- A short in the wire
Front Up-Down Switch Up Front up-down switch up: ON
Switch released: OFFPower seat control unit/B1, B5 Front up-down switch up: 0 V Switch released: 5 V - Faulty control unit
- Faulty switch (see POWER SEAT ADJUSTMENT SWITCH TEST/REPLACEMENT )
- An open or high resistance in the wire
- A short in the wire
Front Up-Down Switch Down Front up-down switch down: ON
Switch released: OFFPower seat control unit/B1, B4 Front up-down switch down: 0 V Switch released: 5 V - Faulty control unit
- Faulty switch (see POWER SEAT ADJUSTMENT SWITCH TEST/REPLACEMENT )
- An open or high resistance in the wire
- A short in the wire
Rear Up-Down Switch Up Rear up-down switch up: ON
Switch released: OFFPower seat control unit/B1, B22
Rear up-down switch up: 0 V
Switch released: 5 V- Faulty control unit
- Faulty switch (see POWER SEAT ADJUSTMENT SWITCH TEST/REPLACEMENT )
- An open or high resistance in the wire
- A short in the wire
Rear Up-Down Switch Down Rear up-down switch down: ON
Switch released: OFFPower seat control unit/B1, B3
Rear up-down switch up: 0 V
Switch released: 5 V- Faulty control unit
- Faulty switch (see POWER SEAT ADJUSTMENT SWITCH TEST/REPLACEMENT )
- An open or high resistance in the wire
- A short in the wire
Ignition Switch for Power Seat Control Ignition switch ON (II) or vehicle ignition ON mode: ON
Ignition switch OFF or vehicle ignition OFF mode: OFFPower seat control unit/B34
Ignition switch ON (II) or vehicle
Ignition ON mode: 12V
Ignition switch OFF or vehicle
ignition OFF mode: 0V- Blown No. 12 (7.5 A) fuse in the driver's under-dash fuse/relay box
- Faulty control unit
- An open or high resistance in the wire
ATP Switch Transmission range switch P position: ON
Any other position than P: OFFPower seat control unit/B26
Transmission range switch P: 0 V
Any other position than P: 12 V- Faulty control unit
- Faulty transmission range switch
- An open or high resistance in the wire
Slide Sensor Seat moving forward or backward: ON
Seat not moving: OFFPower seat control unit/B11
Pulses as seat moves: 2.5 V average- Faulty control unit
- Faulty sensor
- An open or high resistance in the wire
Front Up-Down Sensor Seat front moving up/down: ON
Seat not moving: OFFPower seat control unit/B12
Pulses as seat moves: 2.5 V average- Faulty control unit
- Faulty sensor
- An open or high resistance in the wire
Recline Sensor Seat-back moving forward or backward: ON
Seat not moving: OFFPower seat control unit/B10
Pulses as seat moves: 2.5 V average- Faulty control unit
- Faulty sensor
- An open or high resistance in the wire
Rear Up-Down Sensor Seat rear moving up/down: ON
Seat not moving: OFFPower seat control unit/B13
Pulses as seat moves: 2.5 V average- Faulty control unit
- Faulty sensor
- An open or high resistance in the wire
- Exit the DATA LIST and select FUNCTION TEST.
- 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 ignition switch in ON (II) or the vehicle ignition in the ON mode, and all connectors connected.
- Continuity tests should be done with the ignition switch in LOCK (0) or the vehicle ignition in the OFF 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/A8, A18, A17, A7
Disconnect power seat control unit connectors A and B.
Connect A8 to A17 and A7 to A18; 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 Backward Seat slides backward Power seat control unit/A8, A18, A17, A7
Disconnect power seat control unit connectors A and B. Connect A8 to A7 and A17 to A18; driver's seat should slide backward.- Faulty motor
- An open or high resistance in the wire
- A short in the wire
Power Seat: Front Up-Down Motor-Full Up Front of seat moves up Power seat control unit/A8, A18, A16, A6
Disconnect power seat control unit connectors A and B.
Connect A8 to A16 and A6 to A18; 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: Front Up-Down Motor-Full Down Front of seat moves down Power seat control unit/A8, A18, A16, A6
Disconnect power seat control unit connectors A and B.
Connect A8 to A6 and A16 to A18; 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: Rear Up-Down Motor-Full Up Rear of seat moves up Power seat control unit/A1, A4, A2, A10
Disconnect power seat control unit connectors A and B.
Connect A1 to A2 and A10 to A4; rear of driver's seat should move up.- Faulty motor
- An open or high resistance in the wire
- A short in the wire
Power Seat: Rear Up-Down Motor-Full Down Rear of seat moves down Power seat control unit/A1, A4, A2, A10
Disconnect power seat control unit connectors A and B.
Connect A1 to A10 and A2 to A4; rear 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 Power seat control unit/A1, A4, A9, A11
Disconnect power seat control unit connectors A and B.
Connect A1 to A9 and A11 to A4; 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 Backward Seat-back moves backward Power seat control unit/A1, A4, A9, A11
Disconnect power seat control unit connectors A and B.
Connect A1 to A11 and A9 to A4; driver's seat-back should move backward.- Faulty motor
- An open or high resistance in the wire
- A short in the wire