Measure the resistance according to the value(s) in the table below.

Operate the power seat switch knob and move the seat to the rearmost position.

Lexus IS250 IS220d GSE20 ALE20 SEAT

Using a tacker, install the front seatback heater to the end of the seat cover with the 7 tack pins.

Measure the resistance according to the value(s) in the table below.

Move the front seat assembly to the rearmost position by operating the slide handle.

Lexus IS250 IS220d GSE20 ALE20 SEAT

Install the seat heater switch with the 4 claws.

Inspect seat heater switch operation.

Turn the shift lever knob counterclockwise and remove the shift lever knob sub-assembly.