18 button obc problem

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  1. 18 button obc problem 
    #1
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    Hi! I have an e36 325i which was first an 318tds, everything good after swaping the engines but i tried to upgrade my 7 button obc to an 18 buttons obc, I wired everything like the bentley manual.. but the obc doesn't display the fuel consumption and speed, can anyone help me with an idea?
     
     

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    Quote Originally Posted by ct29rip View Post
    Hi! I have an e36 325i which was first an 318tds, everything good after swaping the engines but i tried to upgrade my 7 button obc to an 18 buttons obc, I wired everything like the bentley manual.. but the obc doesn't display the fuel consumption and speed, can anyone help me with an idea?
    this any help?
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    I have already routed all cables and tied them, but the problem is that obc shows 39,5 l/100km consumption and 299 km speed. On the diagnosis i have an error code "speed signal sensor"
     
     

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    Quote Originally Posted by ct29rip View Post
    "speed signal sensor"
    that one of the ABS sensors
     
     

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    ct29rip (27-08-2012)

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    No, OBC just not wired correctly, otherwise ABS light on, plus the speedo signal is off the diff casing sensor not the wheel sensors.

    If speedo works its not the sensors


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    ct29rip (27-08-2012), payno (24-08-2012)

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    #6
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    @payno the ABS it's working
    @E36Coupe328 i wired the OBC according to Bentley Manual, the speedo works fine, so I'm guessing there's a problem between the cockpit wiring from the TDS and the engine compartment wiring camed with the new engine
    This is how I wired the OBC:
    OBC X1071 white plug - pin 1 to pin 15 X1659 EWS plug
    4 - 10 turn indicator
    5 - 12 X16 white plug dashboard
    6 - 21 X16
    7 - 11 X16
    8 - 18 X1070 black plug OBC
    9 - 10 X17 blue plug Dashboard
    13 - 17 X1070
    OBC X1070 Black Plug already on the car from the 7-buttons obc : 3 - 5 X1074 CCM
    4 - 7 X1074 CCM
    5 - 3 X1074 CCM
    6 - 26 X17
    8 - Black/Green wire from ZKE Module
    9 - 4 X17
    13 - 2 X17
    15 - 24 X17
    16 - 2 X16
     
     

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    ok m8 try reading this
    7 to 18 button OBC (On Board Computer) Conversion
    good luck
     
     

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    #8
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    I think i found the problem, according to the ETM wiring diagram there are 2 diference on dash wiring from diesel to petrol, so pin 21 from x16 plug which provides fuel consumption, on diesel DDE plug is pin 49 and on petrol cars is: for M3 and 325i pin 46 on DME, for 316i and 318i is pin 17 DME, for 320,323,328i is pin 9 DME.... And for speed signal pin 2 from X17 plug goes to pin 29 on diesel DDE plug and for petrol cars : M3 pin 42 DME, rest of petrols engines pin 73 DME. Waiting for tomorrow to do changes on DME plug and hope to work!
     
     

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