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

Did you perform the Power Seat Memory System Check?

--

Go to Step 2

Go to Memory Seats System Check

1. Operate the LH 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 LH 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?

--

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?

--

Go to Step 8

Go to Step 5

Replace the LH lumbar switch.

Is the repair complete?

--

Go to Step 9

--

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?

--

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?

--

Go to Step 9

--

Replace the inoperative lumbar motor.

Is the repair complete?

--

Go to Step 9

--

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

Is the repair complete?

--

Go to Step 9

--

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

Was the Memory Seats System Check performed?

--

System OK

--