1

Visually and physically check for proper connections at the following connectors:

Were the connectors firmly attached?

--

Go to Step 3

Go to Step 2

1. Properly connect the connectors.
2. Attempt to adjust the power driver seat.

Does the power driver seat work after the connectors were correctly attached?

--

System OK

Go to Step 3

Attempt to adjust the power driver seat in each of the three directions:

Does the seat adjust in any direction?

--

Go to Step 8

Go to Step 4

1. Disconnect the 4-pin connector from the body wiring harness which is found under the driver seat.
2. Turn the ignition ON.
3. Check the voltage at the RD/WH wire and the body harness side of the 4-pin connector.

Is the voltage equal to the specified value?

11-14 V

Go to Step 6

Go to Step 5

Repair the power supply to the RD/WH wire and Ef23.

Is the repair complete?

--

System OK

--

Use an ohmmeter to check the resistance between ground and the BK wire at the disconnected 4-pin connector, body harness side.

Is the resistance equal to the specified value?

0 ohms

Go to Step 8

Go to Step 7

Repair the open BK wire between ground and the 4-pin body harness connector under the driver seat.

Is the repair complete?

--

System OK

--

Attempt to adjust the power driver seat forward and backward.

Does the power driver seat move forward and backward?

--

Go to Step 14

Go to Step 9

1. Disconnect the power driver seat switch electrical connector.
2. Move a vehicle battery near enough to the power driver seat switch so that jumper wires can reach from the battery to the switch.
3. Connect a jumper wire between the test battery negative terminal and terminal 3 on the motor side of the power driver seat switch.
4. Carefully connect a fused jumper wire between the test battery positive terminal 4 on the motor side of the power driver seat switch. The 2 terminals are close together, and the motor may have a short circuit, so a fused jumper wire is recommended. Do not allow the wires from the battery to touch each other. If the motor is okay and it is not at the end of its travel, the power driver seat should move.
5. To enable the motor to operate in the opposite direction, carefully reverse the battery connections.

Does the motor run backward and forward when the motor was directly powered by a vehicle battery?

--

Go to Step 10

Go to Step 11

1. Replace the power driver seat switch.
2. The power driver seat switch can be installed backward, so test the switch to verify that it is installed correctly before reinstalling the front power driver seat trim and switch.
3. Install the front power driver seat trim.

Is the repair complete?

--

System OK

--

1. Disconnect the 2-pin connector that joins 2 wires from the power driver seat switch to the forward/backward motor.
2. Use an ohmmeter to check the resistance of the 2 wires between the power driver seat switch connector and the forward/backward motor connector.

Is the resistance of each wire equal to the specified value?

0 ohms

Go to Step 13

Go to Step 12

Repair the open circuit in the terminal 3 wire or the terminal 4 wire.

Is the repair complete?

--

System OK

--

Replace the power driver seat motor assembly.

Is the repair complete?

--

System OK

--

Attempt to adjust the power driver seat front height.

Does the front height adjustment work?

--

Go to Step 18

Go to Step 15

1. Disconnect the power driver seat switch electrical connector.
2. Move a vehicle battery near enough to the power driver seat switch so that jumper wires can reach from the battery to the switch.
3. Connect a jumper wire between the test battery negative terminal and terminal 5 on the motor side of the power driver seat switch.
4. Carefully connect a fused jumper wire between the test battery positive terminal and terminal 6 on the motor side of the power driver seat switch. The 2 terminals are close together, and the motor may have a short circuit, so a fused jumper wire is recommended. Do not allow the wires from the battery to touch each other. If the motor is good and it is not at the end of its travel, the power driver seat should move.
5. To enable the motor to operate in the opposite direction, carefully reverse the battery connections between 2 wires.

Did the height adjust up and down when the motor was directly powered by a vehicle battery?

--

Go to Step 10

Go to Step 16

1. Disconnect the 2-pin connector that joins the terminal 5 and terminal 6 wires from the power driver seat switch to the front height motor.
2. Use an ohmmeter to check the resistance of the terminal 5 and terminal 6 wires between the power driver seat switch connector and the front height motor connector.

Is the resistance of each wire equal to the specified value?

0 ohms

Go to Step 13

Go to Step 17

Repair the open circuit in the terminal 5 wire or the terminal 6 wire.

Is the repair complete?

--

System OK

--

Attempt to adjust the power driver seat rear height.

Does the rear height adjustment work?

--

Go to Step 22

Go to Step 19

1. Disconnect the power driver seat switch electrical connector.
2. Move a vehicle battery near enough to the power driver seat switch so that jumper wires can reach from the battery to the switch.
3. Connect a jumper wire between the test battery negative terminal and terminal 7 on the motor side of the power driver seat switch.
4. Carefully connect a fused jumper wire between the test battery positive terminal and terminal 8 on the motor side of the power driver seat switch. The 2 terminals are close together, and the motor may have a short circuit, so a fused jumper wire is recommended. Do not allow the wires from the battery to touch each other. If the motor is good and it is not at the end of its travel, the power driver seat should move.
5. To enable the motor to operate in the opposite direction, carefully reverse the battery connections between 2 wires.

Did the height adjust up and down when the motor was directly powered by a vehicle battery?

--

Go to Step 10

Go to Step 20

1. Disconnect the 2-pin connector that joins the terminal 7 and terminal 8 wires from the power driver seat switch to the front height motor.
2. Use an ohmmeter to check the resistance of the terminal 7 and terminal 8 wires between the power driver seat switch connector and the front height motor connector.

Is the resistance of each wire equal to the specified value?

0 ohms

Go to Step 13

Go to Step 21

Repair the open circuit in the terminal 5 wire or the terminal 6 wire.

Is the repair complete?

--

System OK

--

Attempt to adjust the power driver seat reclining.

Does the power driver seat recline?

--

System OK

Go to Step 23

1. Disconnect the power driver seat switch electrical connector.
2. Move a vehicle battery near enough to the power driver seat switch so that jumper wires can reach from the battery to the switch.
3. Connect a jumper wire between the test battery negative terminal and terminal 9 on the motor side of the power driver seat switch.
4. Carefully connect a fused jumper wire between the test battery positive terminal and terminal 10 on the motor side of the power driver seat switch. The 2 terminals are close together, and the motor may have a short circuit, so a fused jumper wire is recommended. Do not allow the wires from the battery to touch each other. If the motor is good and it is not at the end of its travel, the power driver seat should move.
5. To enable the motor to operate in the opposite direction, carefully reverse the battery connections between 2 wires.

Did the height adjust up and down when the motor was directly powered by a vehicle battery?

--

Go to Step 10

Go to Step 24

1. Disconnect the 2-pin connector that joins the terminal 9 and terminal 10 wires from the power driver seat switch to the front height motor.
2. Use an ohmmeter to check the resistance of the terminal 9 and terminal 10 wires between the power driver seat switch connector and the front height motor connector.

Is the resistance of each wire equal to the specified value?

0 ohms

Go to Step 13

Go to Step 25

Repair the open circuit in the terminal 9 wire or the terminal 10 wire.

Is the repair complete?

--

System OK

--

Were you sent here from Symptoms or another diagnostic table?

--

Go to Step 2

Go to Diagnostic Starting Point - Seats

Visually and physically check for proper connections at the following connectors:

Were the connectors firmly attached?

--

Go to Step 4

Go to Step 3

1. Properly connect the connectors.
2. Attempt to adjust the power driver seat.

Does the power driver seat work after the connectors were correctly attached?

--

System OK

Go to Step 4

Attempt to adjust the power driver seat in each of the four directions:

Does the seat adjust in any direction?

--

Go to Step 9

Go to Step 5

1. Disconnect the 4-pin connector from the body wiring harness which is found under the driver seat.
2. Turn the ignition ON.
3. Check the voltage at the RD/WH wire on the body harness side of the 4-pin connector.

Is the voltage equal to the specified value?

11-14 V

Go to Step 7

Go to Step 6

Repair the power supply to the RD/WH wire and Ef23.

Is the repair complete?

--

Go to Step 28

--

Use an ohmmeter to check the resistance between ground and the BK wire at the disconnected 4-pin connector, body harness side.

Is the resistance equal to the specified value?

0 Ω

Go to Step 9

Go to Step 8

Repair the open BK wire between ground and the 4-pin body harness connector under the driver seat.

Is the repair complete?

--

Go to Step 28

--

Attempt to adjust the power driver seat forward and backward.

Does the power driver seat move forward and backward?

--

Go to Step 15

Go to Step 8

1. Disconnect the power driver seat switch electrical connector.
2. Place a vehicle battery near enough to the power driver seat switch so that jumper wires can reach from the battery to the switch.
3. Connect a jumper wire between the test battery negative terminal and terminal 9 on the motor side of the power driver seat switch.
4. Carefully connect a fused jumper wire between the test battery positive terminal 10 on the motor side of the power driver seat switch. The 2 terminals are close together, and the motor may have a short circuit, so a fused jumper wire is recommended. Do not allow the wires from the battery to touch each other. If the motor is okay and it is not at the end of its travel, the power driver seat should move.
5. To enable the motor to operate in the opposite direction, carefully reverse the battery connections.

Does the motor run backward and forward when the motor was directly powered by a vehicle battery?

--

Go to Step 11

Go to Step 12

1. Replace the power driver seat switch. Refer to Driver Seat Control Module Replacement.
2. Install the front seat trim panels. Refer to Front Seat Trim Panel Replacement.

Is the repair complete?

--

Go to Step 28

--

1. Disconnect the 2-pin connector that joins 2 wires from the power driver seat switch to the forward/backward motor.
2. Use an ohmmeter to check the resistance of the 2 wires between the power driver seat switch connector and the forward/backward motor connector.

Is the resistance of each wire equal to the specified value?

0 Ω

Go to Step 14

Go to Step 13

Repair the open circuit in the terminal 9 wire or the terminal 10 wire.

Is the repair complete?

--

Go to Step 28

--

Replace the front seat adjuster assembly. Refer to Front Seat Adjuster Replacement.

Is the repair complete?

--

Go to Step 28

--

Attempt to adjust the power driver seat front height.

Does the front height adjustment work?

--

Go to Step 19

Go to Step 16

1. Disconnect the power driver seat switch electrical connector. Refer to Driver Seat Control Module Replacement.
2. Move a vehicle battery near enough to the power driver seat switch so that jumper wires can reach from the battery to the switch.
3. Connect a jumper wire between the test battery negative terminal and terminal 5 on the motor side of the power driver seat switch.
4. Carefully connect a fused jumper wire between the test battery positive terminal and terminal 6 on the motor side of the power driver seat switch. The 2 terminals are close together, and the motor may have a short circuit, so a fused jumper wire is recommended. Do not allow the wires from the battery to touch each other. If the motor is good and it is not at the end of its travel, the power driver seat should move.
5. To enable the motor to operate in the opposite direction, carefully reverse the battery connections between 2 wires.

Did the height adjust up and down when the motor was directly powered by a vehicle battery?

--

Go to Step 11

Go to Step 17

1. Disconnect the 2-pin connector that joins the terminal 5 and terminal 6 wires from the power driver seat switch to the front height motor.
2. Use an ohmmeter to check the resistance of the terminal 5 and terminal 6 wires between the power driver seat switch connector and the front height motor connector.

Is the resistance of each wire equal to the specified value?

0 Ω

Go to Step 14

Go to Step 18

Repair the open circuit in the terminal 5 wire or the terminal 6 wire.

Is the repair complete?

--

Go to Step 28

--

Attempt to adjust the power driver seat rear height.

Does the rear height adjustment work?

--

Go to Step 23

Go to Step 20

1. Disconnect the power driver seat switch electrical connector. Refer to Driver Seat Control Module Replacement.
2. Move a vehicle battery near enough to the power driver seat switch so that jumper wires can reach from the battery to the switch.
3. Connect a jumper wire between the test battery negative terminal and terminal 7 on the motor side of the power driver seat switch.
4. Carefully connect a fused jumper wire between the test battery positive terminal and terminal 8 on the motor side of the power driver seat switch. The 2 terminals are close together, and the motor may have a short circuit, so a fused jumper wire is recommended. Do not allow the wires from the battery to touch each other. If the motor is good and it is not at the end of its travel, the power driver seat should move.
5. To enable the motor to operate in the opposite direction, carefully reverse the battery connections between 2 wires.

Did the height adjust up and down when the motor was directly powered by a vehicle battery?

--

Go to Step 11

Go to Step 21

1. Disconnect the 2-pin connector that joins the terminal 7 and terminal 8 wires from the power driver seat switch to the front height motor.
2. Use an ohmmeter to check the resistance of the terminal 7 and terminal 8 wires between the power driver seat switch connector and the front height motor connector.

Is the resistance of each wire equal to the specified value?

0 Ω

Go to Step 14

Go to Step 22

Repair the open circuit in the terminal 7 wire or the terminal 8 wire.

Is the repair complete?

--

Go to Step 28

--

Attempt to adjust the power driver seat reclining.

Does the power driver seat recline?

--

Go to Step 28

Go to Step 24

1. Disconnect the power driver seat switch electrical connector. Refer to Driver Seat Control Module Replacement.
2. Move a vehicle battery near enough to the power driver seat switch so that jumper wires can reach from the battery to the switch.
3. Connect a jumper wire between the test battery negative terminal and terminal 3 on the motor side of the power driver seat switch.
4. Carefully connect a fused jumper wire between the test battery positive terminal and terminal 4 on the motor side of the power driver seat switch. The 2 terminals are close together, and the motor may have a short circuit, so a fused jumper wire is recommended. Do not allow the wires from the battery to touch each other. If the motor is good and it is not at the end of its travel, the power driver seat should move.
5. To enable the motor to operate in the opposite direction, carefully reverse the battery connections between 2 wires.

Did the seat recline back and forth the motor was directly powered by a vehicle battery?

--

Go to Step 11

Go to Step 25

1. Disconnect the 2-pin connector that joins the terminal 3 and terminal 4 wires from the power driver seat switch to the front height motor.
2. Use an ohmmeter to check the resistance of the terminal 3 and terminal 4 wires between the power driver seat switch connector and the front height motor connector.

Is the resistance of each wire equal to the specified value?

0 Ω

Go to Step 27

Go to Step 26

Repair the open circuit in the terminal 3 wire or the terminal 4 wire.

Is the repair complete?

--

Go to Step 28

--

Replace the power driver seat back assembly. Refer to Front Seat Back Replacement.

Is the repair complete?

--

Go to Step 28

--

Attempt to adjust the power driver seat in each of the four directions:

Does the seat adjust in all direction?

System OK

Go to Step 4