Year of Manufacture *: 2004
( Optional ) Engine Code or CC: 1.2 16v D4F722
engine ecu - no comms, non-start
Hi all
got a right royal pain with this one
immobiliser light stays on solid, worked through clio fault finding notes on immob.
key recognised & correct. next step is to check ecu.
no comms with ecu at all, siemens sim32 3 multiplugs.
according to ad wiring digram, 1 fused feed to ecu also tags to engine control relay. load tested with v. drop of 0.02v using teslite
1 earth split to 5 pins, load tested, v drop 0.03v using same method.
2 comms wires from uch connect to ecu, both load tested to 0.02v drop when disconnected at either end & 12v fed in,
checked white multiplug, fuses & relays in engine bay fuse box, all ok, no earth feed from ecu to engine cont. relay, no fuel pump prime, all function when relays triggered.
sent ecu to "reputable" ecu repairer to be made free running, also requested that they checked the ecu did actually power up & operate when immob. work done. don't think they read that part as i rang them this aft, had to speak to another guy (3rd party)who actually did the ecu, he wanted picture sending of ecu label & engine code, done, & then he was muttering about one that he'd fitted once that wouldn't power up due to it being on an incline & lack of fuel pressure being the reason it only cranked for 3 seconds (ecu self protection) & when it was on the level the fuel pressure was sufficient to allow crank & start.
as there's no fuel prime probably due to the fact that the ecu is not powering up to switch the relays i'm not convinced. sorry for the rant, but i'm hoping i've not missed a vital check that would account for this renault dead in my workshop.
anybody help please?
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