Pecky's Vauxhall Decoder

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  1. #1
    Member TotallyMobile1's Avatar
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    Non Starting Zafira

    I have a vauxhall Zafia 1.6 petrol 2005 Changed sim module,ecu ,rear fusebox,front fusebox, cleaned all earths, the car randomly cranks then stops if you pull the ecu relay its resets and might start. codes that stay in the cim u2100 and u2105 .sometimes there is no communication all together on all modules.
    Must someting like abs not send signal. Any thoughts?


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    • #2
      Member TotallyMobile1's Avatar
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      Helpppppppp

    • #3
      VIP domtorredo's Avatar
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      Peugeot Expert
      Does light with spanner flashes on ipc? What you used to program all these parts what you changed?

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    • #4
      Member TotallyMobile1's Avatar
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      Sometimes but most of the time no. Also I change everything over ecu cim fusebox from another kit same problem.

    • #5
      VIP domtorredo's Avatar
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      Right spanner light means something with immo
      Does anyone programmed anything after ecu cim fusebox replacement? You cant just change them over they needs to be programmed. Have you checked if previous owner havnt had fitted tracker?

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    • #6
      Member TotallyMobile1's Avatar
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      Right striped the loom. findings on the left piller bottom connection there are 2 sets of canbus wires green and white. one is pluseing signal out to the fuse box.the other dead.
      not sure where it goes to but when i check the cim it has two sets green and white also.dose anyone know of have a shematics on that part of the loom or know ehere the othe pair of can bus goses. The pair of twisted green and white wire gose into the Abs back into the car up towards the dash.
      then im lost please help.
      thanks you

    • #7
      VIP domtorredo's Avatar
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      Will check for you

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    • #8
      VIP domtorredo's Avatar
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      This should give you idea how can bus is wired not a best drawing but should do for now
      Click image for larger version. 

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    • #9
      Member nikh667's Avatar
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      Astra 1.9CDTi
      Hi hi, first post on here so hopefully I can be of some help.

      A good initial test to carry out on the HSCAN is to measure the bus where it terminates at the diagnostic plug (pins 6 & 14) for resistance. Have it all connected up back together and use a multimeter set to resistance and measure across these two terminals, you should have approximately 60ohms (this means the HSCAN is physically connected together ok, the bus has two of it's control units with 120ohm resistors built into them to prevent signal bounce, if the twisted wires are broken through anywhere, it'll give a different meter reading).

      The UEC has HSCAN wiring passing through it, however the unit itself does not communicate on the HSCAN, something to bear in mind when testing.

      Another area to check, does this vehicle start and run okay if bump started.? I recently diagnosed a starter motor on a Z16XEP Astra for no start - symptoms were that the vehicle would crank two or three times, then stop - after that it would lose communication with the engine ECU and throw all sorts of BUS errors and DTC's. The starter sounded healthy but was drawing too much current through the earth path it shares with the ECM.

    • #10
      VIP domtorredo's Avatar
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      Diag socket wont give much as cim is a gateway to rest of ecus and it will give same reading all the time, best to check between nodes.


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