Schematic Reference: Driver Seat Schematics and Passenger Seat Schematics

Connector End View Reference: Power Seat Connector End Views

Did you review the Power Seats System Description and Operation and perform the necessary inspections?

Go to Step 2

Go to Symptoms - Seats

Verify the fault is present.

Does the system operate normally?

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

Go to Step 3

1. Disconnect the front vertical adjuster motor connector.
2. Connect a test lamp between the front vertical motor control circuit terminals in the harness connector.
3. Operate the front vertical adjuster switch in both directions.

Does the test lamp illuminate when the switch is operated in both directions?

Go to Step 6

Go to Step 4

Test the front vertical motor control circuits for an open or short to ground. Refer to Circuit Testing and to Wiring Repairs in Wiring Systems.

Did you find and correct the condition?

Go to Step 9

Go to Step 5

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

Did you find and correct the condition?

Go to Step 9

Go to Step 7

Inspect for poor connections at the front vertical adjuster motor. Refer to Testing for Intermittent Conditions and Poor Connections and to Connector Repairs in Wiring Systems.

Did you find and correct the condition?

Go to Step 9

Go to Step 8

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

Is the repair complete?

Go to Step 9

--

Replace the front vertical adjuster motor. Refer to Front Seat Adjuster Replacement .

Is the repair complete?

Go to Step 9

--

Operate the system to verify the repair.

Did you correct the condition?

System OK

Go to Step 2

Schematic Reference: Driver Seat Schematics

Connector End View Reference: Power Seat Connector End Views

Did you perform the Diagnostic System Check - Vehicle?

Go to Step 2

Go to Diagnostic System Check - Vehicle in Vehicle DTC Information

Verify the condition is present.

Does the system operate normally?

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

Go to Step 3

1. Install a scan tool.
2. Observe the Front Vertical Up and Down Switch parameters in the driver seat module (DSM) Input/Output data list.

Do either of the Front Vertical Switch parameters display Active?

Go to Step 4

Go to Step 5

Disconnect the seat adjuster switch connector.

Do both of the Front Vertical Switch parameters display Inactive?

Go to Step 14

Go to Step 10

Operate the front vertical up switch.

Does the scan tool display the front vertical up switch as Active?

Go to Step 6

Go to Step 7

Operate the front vertical down switch.

Does the scan tool display the front vertical down switch as Active?

Go to Step 9

Go to Step 8

1. Disconnect the seat adjuster switch connector.
2. Connect a fused jumper wire from the battery voltage supply circuit terminal to the front vertical up switch signal circuit terminal in the harness connector.

Does the scan tool display the front vertical up switch as Active?

Go to Step 14

Go to Step 11

1. Disconnect the seat adjuster switch connector.
2. Connect a fused jumper wire from the battery voltage supply circuit terminal to the front vertical down switch signal circuit terminal in the harness connector.

Does the scan tool display the front vertical down switch as Active?

Go to Step 14

Go to Step 12

1. Disconnect the inoperative adjuster motor connector.
2. Connect a test lamp across the control circuit terminals in the harness connector.
3. Press and release the adjuster switch in both directions.

Does the test lamp illuminate when the switch is pressed in both directions?

Go to Step 16

Go to Step 13

Test the active front vertical switch signal circuit for a short to voltage. Refer to Circuit Testing and to Wiring Repairs in Wiring Systems.

Did you find and correct the condition?

Go to Step 20

Go to Step 15

Test the front vertical up switch signal circuit for an open or high resistance. Refer to Circuit Testing and to Wiring Repairs in Wiring Systems.

Did you find and correct the condition?

Go to Step 20

Go to Step 15

Test the front vertical down switch signal circuit for an open or high resistance. Refer to Circuit Testing and to Wiring Repairs in Wiring Systems.

Did you find and correct the condition?

Go to Step 20

Go to Step 15

Test the motor control circuits for an open or a high resistance. Refer to Circuit Testing and to Wiring Repairs in Wiring Systems.

Did you find and correct the condition?

Go to Step 20

Go to Step 15

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

Did you find and correct the condition?

Go to Step 20

Go to Step 17

Inspect for poor connections at the DSM harness connectors. Refer to Testing for Intermittent Conditions and Poor Connections and to Connector Repairs in Wiring Systems.

Did you find and correct the condition?

Go to Step 20

Go to Step 18

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

Did you fin and correct the condition?

Go to Step 20

Go to Step 19

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

Is the repair complete?

Go to Step 20

--

Replace the DSM. Refer to Control Module References in Computer/Integrating Systems for replacement, setup, and programming.

Is the repair complete?

Go to Step 20

--

Replace the inoperative adjuster motor. Refer to Front Seat Adjuster Motor Replacement .

Is the repair complete?

Go to Step 20

--

Operate the system to verify the repair.

Did you correct the condition?

System OK

Go to Step 3