S90 L6-2.9L VIN 96 B6304S (1998)
Seat Heater Control Module: Service and Repair
Removing
WARNING: Seats with SIPS bag must always have the transport safety device installed in order to avoid accidentally activating the system
when working on the seat.
HHC1 Preparations
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Make a note of radio code if anti-theft coded radio is installed.
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Remove battery negative lead.
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Cars with SIPS airbag: install the safety device for the SIPS bag.
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Remove seat from car.
HHC2 Removing the control module
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Disconnect the four connectors from the control module.
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Remove the tie-strap holding the mounting plate in position.
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Unhook control module fixing plate at front edge.
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Lift fixing plate clear at front edge and remove control module.
HHC3 Reinstalling
Reinstall in reverse order.
Check that the new control module has P/N 9174902 (for the left seat) or 9174903 (for the right seat).
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Reinstall the seat.
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Cars with SIPS airbag: remove the safety device.
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Replace battery negative lead.
HHC4 Programming the memory functions
The new control module must be programmed with the positions for memory functions 1, 2 and 3. Otherwise diagnostic trouble codes (DTCs)
PSL/PSR-323, PSL/PSR-322 or PSL/PSR-321 may be posted.