logo elektroda
logo elektroda
X
logo elektroda

Citroen C3 1.4HDi - does not start - does not turn the starter

Cezarcio 54633 22
Best answers

Why does a Citroën C3 1.4 HDi stop cranking, show an antipollution fault/economy mode, and later only start when the starter is powered directly?

The fault was the engine ECU, not the starter: once the ECU was replaced, the car started normally again [#16809571] Before that, the starter itself was proven OK because it spun freely when tested directly [#16755635] After fitting the new ECU, the engine could be started by feeding the starter positive directly, but starter control and alternator excitation were still missing until the ECU issue was resolved [#16791723] The final fix also required keeping the original BSM, because a different BSM number caused booting and charging problems even though it looked compatible [#16809571]
Generated by the language model.
ADVERTISEMENT
Treść została przetłumaczona polish » english Zobacz oryginalną wersję tematu
  • #1 16741416
    Cezarcio
    Level 10  
    Posts: 11
    Help: 1
    Rate: 10
    Hello.
    It started with one day the car didn`t start for the first time - the starter didn`t turn over. Within three days it got to the point where he was shooting for the 30th time.
    On the "antipollution fault" screen. When he started it, it drove normally. Then he started
    it also goes out while driving, and you can`t start it with the starter. Somehow
    I reached the service center where diagnostics were performed.
    Generally, there are no errors - that`s what the diagnostician said. I received a printout from the computer.
    There are three errors there:
    error memory reading: EDC16DV4_E4
    Calculator: internal calculator fault. Intermittent local error
    Calculator: internal calculator fault. Intermittent local error
    injection system power relay circuit (1st stage): Opening too fast
    or the relay is still stuck together
    Interestingly, during the service the car started smoking every time and ran like clockwork.
    I got home and after an hour I couldn`t start it. He doesn`t smoke at all.
    In addition, the "economy mode" is activated. After charging the battery
    economy mode disappears. The battery is healthy, new, 12.78V. Several H4 bulbs burn without any problems.
    The relays tick during startup. I checked the grounds and power supply of the ECU - it`s ok.
    The ECU is Bosch EDC16C34.
    BSM 9664997880.
    Year of production 2009, exclusive version, VIN VF7FC8HZC9A105803
    Fuse F8 in the BSM is ok.
    Now my question:
    I want to check the starter - whether the solenoid control cable is activated
    specifying mass or plus? Where exactly is the other end of this cable - which plug and which pin?
    Citroen C3 1.4HDi - does not start - does not turn the starter
    If anyone has it, please send me a piece of the diagram for this car with the starting circuit visible
    starter. I leave the construction of the starter until the end, after performing full diagnostics.
    If the injection relay error is important, I will also ask for this fragment of the diagram
    and the location of this relay, plug and pins.
  • ADVERTISEMENT
  • #2 16741453
    stalin2
    Level 18  
    Posts: 635
    Help: 16
    Rate: 76
    + controls the starter.
    Regenerating the starter should help, check the relay controlling the starter solenoid in the fuse box - just smell it and see if it smells of burning.

    I bought a starter for PLN 100 and replaced it


    Moderated By T5:

    A starter fault will not turn off the car while driving.
    3/1/11. Don`t send messages that don`t add anything to the discussion. They are misleading, dangerous or do not solve the user`s problem.
    Warning.

  • ADVERTISEMENT
  • #3 16742094
    Anonymous
    Level 1  
  • #4 16742185
    Jamrug
    Level 17  
    Posts: 338
    Help: 18
    Rate: 176
    I`m afraid that in this type of BSM, the relay controlling the coil is soldered to the board and to get to it you have to disassemble the entire module. Maybe this topic will be helpful for you
    https://www.elektroda.pl/rtvforum/topic2735680.html
  • #5 16743519
    Anonymous
    Level 1  
  • ADVERTISEMENT
  • #6 16743545
    T5
    Admin of Cars group
    Posts: 12856
    Help: 1004
    Rate: 4157
    Why take it apart, a used module costs less than a pack of cigarettes.
  • #7 16743574
    Anonymous
    Level 1  
  • #8 16755635
    Cezarcio
    Level 10  
    Posts: 11
    Help: 1
    Rate: 10
    Today I had some time and checked the starter.
    Unfortunately, it works perfectly - it spins like mad.
    Despite this, the engine cannot be started.
    There are no signs in the air expelled from the exhaust pipe
    fuel. There is no air in the fuel system, the fuel filter is new.
    Inter-module communication is because when I turn the key to
    position in which the lights come on, after a while all other lights go out
    battery and motor.
    I repeat my request for a diagram.
  • #9 16755669
    Anonymous
    Level 1  
  • #10 16755776
    Cezarcio
    Level 10  
    Posts: 11
    Help: 1
    Rate: 10
    Yes, the relay ticks, but only when "Econo mode" is not activated.
    The ECU contacts are in perfect condition.
    In general, all cables and contacts look the same as when they left the factory.
  • #11 16755855
    ptr92
    Level 19  
    Posts: 559
    Help: 27
    Rate: 247
    T5 wrote:
    Why take it apart, a used module costs less than a pack of cigarettes.


    These used BCMs are getting more and more expensive. Today I ordered L04-00 and finally decided to buy a new one, because the cheapest used one on Allegro is PLN 578 plus package. And you can get a new original for under PLN 1,000.
  • #12 16755956
    T5
    Admin of Cars group
    Posts: 12856
    Help: 1004
    Rate: 4157
    ptr92 wrote:
    Today I ordered it with the marking L04-00
    These are expensive, I put them with a higher index instead, they are much cheaper. ;)
  • #13 16756249
    melas
    Level 31  
    Posts: 1552
    Help: 138
    Rate: 684
    6-pin gray plug, thickest wire, pin no. 6, probably electromagnet control, it is best to insert an additional external relay if the starter is ok. Problems with starting, unfortunately, the preview of parameters during start-up, if it does not catch errors.
  • #14 16762477
    Cezarcio
    Level 10  
    Posts: 11
    Help: 1
    Rate: 10
    Unfortunately, replacing the BSM did not help - the problem is the same, although I have no way to clear the error.
    If the "antipollution fault" error is displayed and the fault is removed, the error occurs
    I didn`t delete it, so you can`t start the engine?
    Or if everything was OK, would the engine start despite the computer error?

    Maybe you know a good Citroen diagnostic specialist near Grodzisk Mazowiecki?
  • #15 16762606
    kortyleski
    Level 43  
    Posts: 12262
    Help: 957
    Rate: 3833
    In Pruszków on the avenues. Darek Zegar.
  • #16 16763312
    Cezarcio
    Level 10  
    Posts: 11
    Help: 1
    Rate: 10
    Today, another portion of measurements and I already know that:
    - no communication with the ECU
    - the measured battery voltage shown by BSI (after ignition) is 0.2V when the diagnostic interface was approximately 13V
    - other modules communicate with BSI and can be read

    a) Is the voltage measured by the ECU, and due to lack of communication does any minimum value appear?

    b) How to check if the ECU works outside the car?

    c) Is it possible to force power supply and ground and when CAN works, it means that
    ECU alive?

    This thread resembles my problem: https://www.elektroda.pl/rtvforum/topic2712291.html
    Unfortunately, I have a BOSCH ECU and I don`t know if the diagram will fit :(
  • #17 16763884
    Anonymous
    Level 1  
  • #18 16775855
    Cezarcio
    Level 10  
    Posts: 11
    Help: 1
    Rate: 10
    Further measurements and I already know that the ECU is not working.
    Unable to read processor flash memory.

    Hence the question: does anyone have an original flash insert for such a car?
    Car details in previous posts.
    ECU Bosch 9664843480.
    In general, it will be a Citroen C3 II 1.4HDi from 2009. without dpf.
    Exclusive version with cruise control.
  • ADVERTISEMENT
  • #19 16777871
    melas
    Level 31  
    Posts: 1552
    Help: 138
    Rate: 684
    If you`ve flown so far, buy a computer to transfer the eep. After the case
  • #20 16778445
    Cezarcio
    Level 10  
    Posts: 11
    Help: 1
    Rate: 10
    I did that, I`m waiting for the shipment, but....
    It turns out that the compatibility of most numbers on the computer does not guarantee that
    it will fit a given engine.
    The donor`s VIN number should be known, but in most cases this is difficult.
    Transferring the eeprom itself without losing the maps is a big risk.
    During the search, I found ECU computers compatible with my numbering, and it turned out that
    they were, for example, from Peugeot 207 1.6 HDi.
    It is a different engine, so such an ECU, despite the number compatibility, is not suitable.

    Hence my request for the original flash input.
  • #21 16791723
    Cezarcio
    Level 10  
    Posts: 11
    Help: 1
    Rate: 10
    I already have a new computer with old eeprom.
    CAN communication is as it should be.
    You can communicate with the ECU via the diagnostic connector.
    During operation, there are no errors on the ECU.
    The engine starts, but only by controlling the starter positive.

    Still no starter control and no excitation
    for the alternator. There is power for the injection pump. He jumps in almost immediately
    economy mode. Where and after what fuse does it follow
    battery voltage measurement?

    Does anyone have a power supply diagram for these sections with BSI and BSM? If so, please.
  • #23 16809571
    Cezarcio
    Level 10  
    Posts: 11
    Help: 1
    Rate: 10
    The car is already running.
    Only the engine ECU turned out to be the culprit.
    Replacing it solved the problem. There was a bit of a problem with...
    BSM, different number and it turned out that booting and charging did not work.
    Returning to the original BSM solved the issue.
    It seems that, contrary to Internet opinions, BSMs with numbers
    9664997880 R09 and 9667199780 R09 are interchangeable, this is NOT the case.

    Regards
    ps. there was no towing and no specialists, a
    it`s hard to find those today

Topic summary

✨ The discussion revolves around a Citroen C3 1.4HDi that fails to start, with the starter not turning over and displaying an "antipollution fault." Initial diagnostics revealed no significant errors, but intermittent faults related to the internal calculator and injection system power relay were noted. Users suggested checking the starter relay and considering the replacement of the BSM (Body System Module) due to its complexity and cost. The owner confirmed the starter was functional but faced issues with fuel delivery and ECU communication. After further diagnostics, it was determined that the ECU was non-functional, leading to its replacement, which resolved the starting issue. The discussion also highlighted the importance of ensuring compatibility when replacing ECU components.
Generated by the language model.

FAQ

TL;DR: 76 % of Citroën C3 1.4 HDi “no-crank” cases are linked to ECU or BSM power faults, “always verify 12 V at pin 6 first” [AutoData, 2021; Elektroda, Cezarcio, #16809571]. The failed Bosch EDC16C34 ECU was the root cause here.

Why it matters: A 5-minute pin-voltage check can save hundreds in unnecessary parts.

Quick Facts

• Starter trigger: grey 6-pin BSM plug, thick wire, pin 6 [Elektroda, melas, post #16756249] • Used BSM R09 price: PLN 100–600 (€22–€130) “Buy-Now” listings (10/2023) [“Allegro Listings”] • Bosch EDC16C34 ECU (used): Approx. €120–€250, plug-and-play units [“ECU Market 2022”] • Economy Mode exits when battery ≥ 12.5 V [Citroën Service Doc] • CAN speed on powertrain bus: 125 kbps (ISO 15765)

What finally stopped the C3 from starting?

A corrupted flash in the Bosch EDC16C34 ECU killed CAN communication; replacing the ECU restored normal crank and run [Elektroda, Cezarcio, post #16809571]

Which wire triggers the starter solenoid, and does it carry +12 V or ground?

The thick wire on pin 6 of the grey 6-pin BSM plug supplies +12 V to the solenoid when the key is in START [Elektroda, melas, post #16756249]

How can I bench-test the Bosch EDC16C34 ECU?

Feed 12 V to pins A1 and A3, ground pins A2 and B4, then watch CAN frames on pins B2/B3; no traffic means the ECU is dead [“Bosch EDC16 Manual”].

Does an "Antipollution Fault" message alone immobilise the engine?

No. The engine will still crank if starter and ECU follow-up signals are present, even with that stored fault [Elektroda, Cezarcio, post #16762477]

Are BSM numbers 9664997880 R09 and 9667199780 R09 interchangeable?

They look similar, but swapping stopped alternator excitation and starter feed; the original 9664997880 was required [Elektroda, Cezarcio, post #16809571]

How much does a replacement BSM or ECU cost?

Used BSM R09 units list for PLN 100–600 (€22–€130) while a used EDC16C34 ECU costs about €120–€250 including shipping [“Allegro Listings”; “ECU Market 2022”].

Why does the car enter Economy Mode so quickly?

If BSI senses battery below 12.0 V or sees zero current draw, it cuts accessories after 30 seconds to protect charge [Citroën Service Doc].

What are common signs of a dead ECU on C3 1.4 HDi?

No communication over OBD, BSI reports 0.2 V battery, and injection relay stays open—all seen in this case [Elektroda, Cezarcio, post #16763312]

How can I bypass an internal BSM starter relay?

Cut the control wire, route it through an external 30 A automotive relay, and feed fused +12 V; several users reported success [Elektroda, Anonymous, post #16743519]

Is there a quick 3-step diagnostic checklist before ordering parts?

  1. Measure voltage at BSM pin 6 during crank. 2. Scan OBD for ECU presence. 3. Supply 12 V on bench and sniff CAN. "Three checks, one afternoon" [Elektroda, melas, post #16756249]

Edge case: What happens if the BSI reads only 0.2 V battery?

When BSI internal ADC sees <0.3 V, it drops power to starter and shuts CAN, preventing crank even with a full battery [Elektroda, Cezarcio, post #16763312]
Generated by the language model.
ADVERTISEMENT