Did you perform the Lumbar Support System Check?

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Go to Step 2

Go to Lumbar Support System Check

Inspect the PWR SEATS circuit breaker.

Does the circuit breaker reset?

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Go to Step 4

Go to Step 3

Replace the PWR SEATS circuit breaker.

Is the repair complete?

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Go to Lumbar Support System Check

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Are both the driver and the passenger lumbar supports inoperative?

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Go to Step 5

Go to Step 7

1. Inspect CKT 1440 between C317 cavity C and the BBEC.
2. Inspect ground CKT 1350 between S427 and G450.

Are the circuits OK?

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Go to Step 9

Go to Step 6

Repair the circuits as necessary.

Is the repair complete?

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Go to Lumbar Support System Check

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1. Inspect the motor for overheating.
2. Inspect for pinched or broken wires.

Are the motor and wires OK?

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Go to Step 9

Go to Step 8

Repair or replace the motor and/or wires as necessary.

Is the repair complete?

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Go to Lumbar Support System Check

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1. Do not disconnect C317 (C315 for the right side).

Connect a J 39200 digital multimeter (DMM) to ground and CKT 1440 (ORN) terminal C at C317 (C315 for the right side).

2. Test for voltage.

Is system voltage present?

B+

Go to Step 11

Go to Step 10

Locate and repair the open in CKT 1440 (ORN) between C317 (C315 for the right side) and the PWR SEATS circuit breaker at the BBEC terminal B1.

Is the repair complete?

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Go to Lumbar Support System Check

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1. Do not disconnect C317 (C315 for the right side).

Connect a J 39200 DMM to ground and CKT 1440 (ORN) terminal C at C317 (C315 for the right side) and CKT 1350 (BLK) terminal B at C317 (C315 for the right side).

2. Test for voltage.

Is voltage present?

B+

Go to Step 13

Go to Step 12

Locate and repair the open or high resistance in CKT 1350 (BLK) between C317 (C315 for the right side) and G450.

Is the repair complete?

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Go to Lumbar Support System Check

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1. Access the lumbar switch.
2. Connect a J 39200 DMM to ground and CKT 1440 (ORN) terminal H at the lumbar switch.
3. Test for voltage.

Is voltage present?

B+

Go to Step 15

Go to Step 14

Locate and repair the open in CKT 1440 (ORN) between C317 (C315 for the right side) and terminal H at the seat lumbar support switch.

Is the repair complete?

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Go to Lumbar Support System Check

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1. Connect a J 39200 DMM to CKT 1440 (ORN) terminal H and CKT 1350 (BLK/WHT) terminal E at the lumbar switch.
2. Test for voltage.

Is voltage present?

B+

Go to Step 17

Go to Step 16

Locate and repair the open or high resistance in the BLK/WHT wire between C317 (C315 for the right side) and terminal E at the lumbar switch.

Is the repair complete?

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Go to Lumbar Support System Check

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1. Connect a J 39200 DMM to the DK BLU wire terminal F and the PNK/WHT wire terminal G at the lumbar switch.
2. Test for voltage while operating the switch in the OUT/IN positions.

Is ignition voltage present?

B+

Go to Step 19

Go to Step 18

Replace the lumbar switch.

Is the repair complete?

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Go to Lumbar Support System Check

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1. Loosen the seat in order to access connector C1.
2. Connect a J 39200 DMM to the DK BLU wire at connector C1 and the PNK/WHT wire terminal G at the lumbar switch.
3. Test for voltage.
4. Operate the switch in the OUT position.

Is voltage present?

B+

Go to Step 21

Go to Step 20

Locate and repair the open or high resistance in the DK BLU wire between connector C1 and terminal F at the lumbar switch.

Is the repair complete?

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Go to Lumbar Support System Check

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1. Connect a J 39200 DMM to the PNK/WHT wire at connector C1 and the DK BLU wire terminal F at the lumbar switch.
2. Test for voltage.
3. Operate the switch in the IN position.

Is voltage present?

B+

Go to Step 23

Go to Step 22

Locate and repair the open or high resistance in the PNK/WHT wire between connector C1 and terminal G at the lumbar switch.

Is the repair complete?

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Go to Lumbar Support System Check

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Replace the lumbar motor.

Is the repair complete?

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Go to Lumbar Support System Check

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