'93 940 wagon seat

[1993volvo940]

Our 1993 940 wagon driver's electric/memory seat is not working.
How much does it cost to replace the electronics?
OR...what models and years Volvos could I do a swap and install a used manual seat????

[billofdurham]

Welcome to Matthew's Volvo Site.

How much does it cost to replace the electronics?

That is a question which is very hard to answer. There may just be a bad connection, a broken wire or the whole thing could be finished. The seat has three motors in it and I find it hard to believe that all three would go at the same time which points to a bad connection.

The power seat system incorporates an On-Board Diagnostic (OBD) subsystem used for fault tracing and repair. Mode 1 is used to read stored fault codes. Mode 4 is used to calibrate the seat if control modules, motors, potentiometers, drive cables or other components are removed. The OBD systems vary by model and model year: in 740 and '92 & '93 940 cars, they require a cable connection between the seat connector and the OBD box in the engine compartment above the left wheel well. 960 and 1994-95 940 cars can read the codes directly by inserting the OBD selector pigtail into DLC box "B" position 6. Press the button in box "A" once to select DTM 1 and read out the codes. Erase codes by pressing the button for at least five seconds, wait until the LEDs light up, then press again for at least five seconds. After releasing the button, press it again to obtain code 1-1-1, indicating codes have been erased.

The attached show how to use the OBD for seat diagnosis. General instructions for the use of the OBD are pinned at the top of this forum.

940 power seat diagnosis.pdf

(560.09 KiB) Downloaded 165 times

940 power seats DTC table.pdf

(332.35 KiB) Downloaded 240 times

Manual seats from all years of 940 and from most 740s from 1986 on can be used in the 940. If you go down this route you would need to replace the seat runners as well.

Bill.