Schematic Reference: Power Seats Schematics

1

Did you review the power seat system operation and perform the necessary inspection?

Go to Step 2

Go to Symptoms - Seats

Verify that the Power Seat Does Not Move Forward/Rearward complaint is present.

Does the power seat system operate as described in the system description and operation?

Go to Testing for Intermittent Conditions and Poor Connections in Wiring Systems

Go to Step 3

1. Connect a test lamp from the horizontal motor rearward control circuit of the seat horizontal motor to a good ground.
2. Operate the entire seat REARWARD switch.

Does the test lamp illuminate?

Go to Step 4

Go to Step 6

1. Connect a test lamp from the horizontal motor forward control circuit of the seat horizontal motor to a good ground.
2. Operate the entire seat FORWARD switch.

Does the test lamp illuminate?

Go to Step 5

Go to Step 7

1. Disconnect the seat horizontal motor harness connector.
2. Connect a test lamp between the horizontal motor forward control circuit and the horizontal motor rearward control circuit of the motor harness connector.
3. Operate the entire seat switch in the FORWARD and REARWARD directions.

Does the test lamp illuminate in both directions?

Go to Step 9

Go to Step 8

Test the seat horizontal motor rearward control circuit for an open. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.

Did you find and correct the condition?

Go to Step 12

Go to Step 8

Test the seat horizontal motor rearward control circuit for an open. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.

Did you find and correct the condition?

Go to Step 12

Go to Step 8

Inspect for poor connections at the harness connector of the seat adjuster switch. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems.

Did you find and correct the condition?

Go to Step 12

Go to Step 10

Inspect for poor connections at the harness connector of the seat horizontal motor. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems.

Did you find and correct the condition?

Go to Step 12

Go to Step 11

Replace the seat adjuster switch. Refer to Power Seat Switch Replacement .

Did you complete the replacement?

Go to Step 12

--

Replace the seat horizontal motor. Refer to Seat Adjuster Motor Replacement .

Did you complete the replacement?

Go to Step 12

--

Operate the system in order to verify the repair.

Did you correct the condition?

System OK

Go to Step 2

Schematic Reference: Memory Seats Schematics

1

Did you perform the Diagnostic System Check - Power Seats Systems?

Go to Step 2

Go to Diagnostic System Check - Power Seat Systems

Verify that the Power Seat Does Not Move Forward/Rearward complaint is present.

Does the power seat system operate as described in the system description and operation?

Go to Testing for Intermittent Conditions and Poor Connections in Wiring Systems

Go to Step 3

Operate the entire seat switch in the FORWARD and REARWARD directions.

Does the seat horizontal motor run for approximately 1 second then stop?

Go to Step 13

Go to Step 4

1. Install a scan tool.
2. Turn ON the ignition, with the engine OFF.
3. With a scan tool, observe the Seat Switches parameter in the Memory Seat Module data list.
4. Operate the entire seat FORWARD switch.

Does the Seat Switches parameter change state?

Go to Step 5

Go to Step 7

1. With a scan tool, observe the Seat Switches parameter.
2. Operate the entire seat REARWARD switch.

Does the Seat Switches parameter change state?

Go to Step 6

Go to Step 8

1. Disconnect the seat horizontal motor harness connector.
2. Connect a test lamp between the horizontal motor forward control circuit and the horizontal motor rearward control circuit of the harness connector.
3. Operate the entire seat switch in the FORWARD and REARWARD directions.

Does the test lamp illuminate in both directions?

Go to Step 17

Go to Step 9

1. Disconnect the seat adjuster switch harness connector.
2. Connect a 3 amp fused jumper wire from the power seat horizontal forward switch signal circuit of the harness connector to a good ground.
3. With a scan tool, observe the Seat Switches parameter.

Does the Seat Switches parameter change state?

Go to Step 16

Go to Step 11

1. Disconnect the seat adjuster switch harness connector.
2. Connect a 3 amp fused jumper wire from the power seat horizontal rearward switch signal circuit of the harness connector to a good ground.
3. With a scan tool, observe the Seat Switches parameter.

Does the Seat Switches parameter change state?

Go to Step 16

Go to Step 12

Test the driver seat horizontal motor forward control circuit between the memory seat module and the horizontal motor for a short to ground or an open. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.

Did you find and correct the condition?

Go to Step 21

Go to Step 10

Test the driver seat horizontal motor rearward control circuit between the memory seat module and the horizontal motor for a short to ground or an open. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.

Did you find and correct the condition?

Go to Step 21

Go to Step 15

Test the power seat horizontal forward switch signal circuit between the seat adjuster switch and the memory seat module for an open. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.

Did you find and correct the condition?

Go to Step 21

Go to Step 15

Test the power seat horizontal rearward switch signal circuit between the seat adjuster switch and the memory seat module for an open. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.

Did you find and correct the condition?

Go to Step 21

Go to Step 15

Test the memory seat sensor low reference circuit between the memory seat module and the seat horizontal position sensor for an open. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.

Did you find and correct the condition?

Go to Step 21

Go to Step 14

Test the 5 volt reference circuit between the memory seat module and the seat horizontal position sensor for an open. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.

Did you find and correct the condition?

Go to Step 21

Go to Step 15

Inspect for poor connections at the harness connector of the memory seat module. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems.

Did you find and correct the condition?

Go to Step 21

Go to Step 18

Inspect for poor connections at the harness connector of the seat adjuster switch. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems.

Did you find and correct the condition?

Go to Step 21

Go to Step 19

Inspect for poor connections at the harness connector of the seat horizontal motor. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems.

Did you find and correct the condition?

Go to Step 21

Go to Step 20

Replace the memory seat module (MSM). Refer to Memory Seat Control Module Replacement .

Did you complete the replacement?

Go to Step 21

--

Replace the seat adjuster switch. Refer to Power Seat Switch Replacement .

Did you complete the replacement?

Go to Step 21

--

Replace the seat horizontal motor. Refer to Front Seat Adjuster Replacement .

Did you complete the replacement?

Go to Step 21

--

Operate the system in order to verify the repair.

Did you correct the condition?

System OK

Go to Step 2