Tundra 2WD V6-4.0L (1GR-FE) (2005)
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INSPECT LUMBAR SUPPORT MOTOR OPERATION
a. Connect the positive (+) lead from the battery to terminal 1 and the negative (-) lead to terminal 2. Check that the lumbar support moves to the
release side.
b. Reverse the polarity, and check that the lumbar support moves forward.
If operation is not as specified, replace the lumbar support adjuster.