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Thread: P38A ECUs How many??

  1. 5th April 2011, 09:48 PM #1
    51jay Guest

    P38A ECUs How many??

    Need to know how many ECUs there are in the P38A 95 build.
    My faultmate is showing 4, TRW MPS type 1,BECM, Lucas EAS and HEVAC.
    Does anyone know if this is correct or is there something missing.

    Why doesn't it show the window lift ECU and the seat control and the remote locking etc??
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  2. 5th April 2011, 10:24 PM #2
    Rupert Prior
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    there are many more control units, how many depends on which model p38 you have. not all are connected to the diagnostic socket, and some functions like window control are split between more than one control unit.
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  3. 5th April 2011, 11:39 PM #3
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    p38arover
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    The engine management system should show up. I'd need to check my Faultmate to get the full count that it can see.
    Ron B.
    VK2OTC

    2003 L322 Range Rover Vogue 4.4 V8 Auto
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    Previous: 1983, 1986 RRC; 1995, 1996 P38A; 1995 Disco1; 1984 V8 County 110; Series IIA



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  4. 6th April 2011, 07:40 AM #4
    51jay Guest
    Corrected list
    SMO22 BECM
    SMO27 HEVAC
    SMO26 Lucas EAS
    SMO01 Lucas Gems
    SMO28 Bosch auto box GS2.38
    SMO11 TRW MPS Type 1 airbag
    SMO21 Wabco C Type.

    Only need to know the ones that a scan with the Faultmate should pick up.
    car is Petrol Oct 95 build.
    Thanks for responding
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  5. 6th April 2011, 08:15 AM #5
    p38arover's Avatar
    p38arover
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    That sounds about right. Did you ask on the BBS Rovacom Forum?

    I'll have to plug mine in to check.
    Ron B.
    VK2OTC

    2003 L322 Range Rover Vogue 4.4 V8 Auto
    2007 Yamaha XJR1300
    Previous: 1983, 1986 RRC; 1995, 1996 P38A; 1995 Disco1; 1984 V8 County 110; Series IIA



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  6. 7th April 2011, 05:39 AM #6
    Keithy P38's Avatar
    Keithy P38
    Keithy P38 is offline AT REST
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    Somebody just did a vehicle scan :-)

    Mine's not a GEMS P38, but at last count I have the following

    SM009: BOSCH MOTRONIC M5.2.1
    SM013: TRW SPS (TYPE 2/P38 NRR)
    SM018: WABCO D TYPE (P38 NRR)
    SM022: BECM (P38 NRR)
    SM026: LUCAS EAS (P38 NRR)
    SM027: VALEO HEVAC (P38 NRR)
    SM029: BOSCH AUTO BOX GS8.87.1
    SM039: HELLA CRUISE CONTROL

    You will need to have your cruise control switched on via the dash button when doing a vehicle scan to pick up it's ecu.

    Cheers
    Keithy
    Last edited by Keithy P38; 7th April 2011 at 05:40 AM. Reason: Tip!
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