P38A Seats won't move

freaky421989 · 2025-05-22T16:43:39+0100

Hi,

last year I bought a range rover p38 1995 2.5DSE.
The seat have been replaced by the previous owner. The seats are in good condition, but i'm not able to move them (electric) or use the heated seats.
The previous owner gave me another BCEM. He said if I plug that one in, I will be able to move te seats but the car won't start.

I tried to diagnose the problem with the nanocom. (see pictures)
Only the lines 'heated seat' left and right read 12V. All the other lines read GND.

Any advise on solving this?

Kind regards

Datatek · 2025-05-22T16:52:39+0100

If the BECM is a Lo line one, it will not have the seat functions.. The other BECM may just need syncing to the EDC in order to start the car.

freaky421989 · 2025-05-22T16:57:43+0100

Datatek said:
If the BECM is a Lo line one, it will not have the seat functions.. The other BECM may just need syncing to the EDC in order to start the car.

How to do this syncing?

Datatek · 2025-05-22T17:00:02+0100

freaky421989 said:
How to do this syncing?

With Nanocom, read the security code from the EDC, then write that code into the BECM. I don't have a Nanocom so I cannot be more precise.

pwood999 · 2025-05-22T19:17:23+0100

Read the Nanocom guides first, so you know what the menus do for each ECU. Also check the seat fuses.

With Ignition on, you need to read the EMS code, and write it down. Then with Ignition off, write that into the Immobilisation Code box in the BECM.

Ignore the actual values on these pictures - they are just examples from the BBS Nanocom Emulator.

EDC Setting Screens

BECM Settings

Next Screen

Grrrrrr · 2025-05-22T19:25:18+0100

freaky421989 said:
Hi,

last year I bought a range rover p38 1995 2.5DSE.
The seat have been replaced by the previous owner. The seats are in good condition, but i'm not able to move them (electric) or use the heated seats.
The previous owner gave me another BCEM. He said if I plug that one in, I will be able to move te seats but the car won't start.

I tried to diagnose the problem with the nanocom. (see pictures)
Only the lines 'heated seat' left and right read 12V. All the other lines read GND.

Any advise on solving this?

Kind regards

You'll need the highline BECM and then switch over the top board from the lowline one.

Datatek · 2025-05-22T19:30:13+0100

Grrrrrr said:
You'll need the highline BECM and then switch over the top board from the lowline one.

No need to swap boards, he already has a BECM that is supposed to work the seats.

Grrrrrr · 2025-05-22T19:32:42+0100

Datatek said:
No need to swap boards, he already has a BECM that is supposed to work the seats.

Yes but unless it has already been cloned to his car the keys won't work and neither will the EKA.

Datatek · 2025-05-22T19:36:34+0100

Grrrrrr said:
Yes but unless it has already been cloned to his car the keys won't work and neither will the EKA.

True, but if he has the BECM, I would hope he has the FOBs to go with it. EKA is best turned off regardless..

P38A Seats won't move

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