Schematic Reference: Driver Seat Schematics and Passenger Seat Schematics

Connector End View Reference: Power Seat Connector End Views

DEFINITION: The power lumber function is inoperative, all other power seat functions operate normal.

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

Go to Step 2

Go to Symptoms - Power Seats

Attempt to operate all of the power seat adjuster motors through their full range of adjustment.

Do all of the power seat adjuster motors operate properly?

Go to Testing for Intermittent Conditions and Poor Connections

Go to Step 3

Are all of the power seat adjuster motors inoperative?

Go to Power Seat Inoperative

Go to Step 4

1. Disconnect the lumbar adjuster motor connector.
2. Connect a test lamp across the motor control circuit terminals.
3. Press the power lumbar switch in both directions.

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

Go to Step 6

Go to Step 5

1. Disconnect the power lumbar switch connector.
2. Test the lumbar adjuster motor control circuits for an open or short to ground. Refer to Circuit Testing and Wiring Repairs .

Did you find and correct the condition?

Go to Step 10

Go to Step 8

Inspect for poor connections at the lumbar adjuster motor. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs .

Did you find and correct the condition?

Go to Step 10

Go to Step 7

Replace the lumbar adjuster motor. Refer to Front Seat Lumbar Support Replacement .

Is the repair complete?

Go to Step 10

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Inspect for poor connections at the power lumbar switch. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs .

Did you find and correct the condition?

Go to Step 10

Go to Step 9

Replace the power lumbar switch. Refer to Power Seat Switch Replacement .

Is the repair complete?

Go to Step 10

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Operate the system in order to verify the repair.

Did you correct the condition?

System OK

Go to Step 2