DEFINITION: This table diagnoses the lumbar support (AL2) in the left seat equipped with the memory function (A43). The table does not cover the left seat without the memory function (A43) or the right seat. Refer to the Lumbar Support System Check for diagnosis of the lumbar support in the right seat or the left seat without A43.

Did you perform the Power Seat Memory System Check?

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Go to Step 2

Go to Memory Seats System Check

1. Operate the left lumbar switch in the inoperative position.
2. Use a test lamp in order to backprobe the lumbar switch connector from cavity E (BLK) to one of the following left lumbar switch connector cavities:

•	Lumbar in: cavity B (DK BLU)

•	Lumbar out: cavity C (YEL)

•	Lumbar down: cavity A (YEL/BLK)

•	Lumbar up: cavity F (WHT)

Does the test lamp light?

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Go to Step 3

Go to Step 4

Test for an open in one of the following circuits:

Refer to Testing for Continuity in Wiring Systems.

Is there an open in the circuit?

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Go to Step 8

Go to Step 5

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

Is the lumbar switch replacement complete?

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Go to Step 9

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1. Disconnect the inoperative lumbar motor connector.
2. Connect a fused jumper from battery positive voltage (B+) to one lumbar motor cavity.
3. Connect a fused jumper from the other lumbar motor cavity to ground.

Does the motor run?

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Go to Step 6

Go to Step 7

Repair the open or the short to ground in the one of the following circuits:

Refer to Wiring Repairs in Wiring Systems.

Is the repair complete?

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Go to Step 9

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

Is the lumbar motor replacement complete?

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Go to Step 9

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Repair the faulty wiring. Refer to Wiring Repairs in Wiring Systems.

Is the repair complete?

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Go to Step 9

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Perform the Power Seat Memory System Check. Refer to Memory Seats System Check .

Was the Memory Seats System Check performed?

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Go to Memory Seats System Check

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