#1: Non-starter 1.4 HDi: mechanical vs electrical Author: Sim, Location: West CountryPosted: Sun Mar 22, 2020 10:48 pm ---- Hey all,
Contrary what I said in the shoutblock, the 2002 £50 runabout hasn't completely recovered from the dead yet.
Albeit managed to start it couple of times earlier this month, lately it's only been spinning the starter.
Immobiliser status (beep test passed):
ECU:
Unit control condition: ECU locked
Status of the coded engine immobilizer programming: matched ECU
Problems detected when transmitting the unlock code: awaiting response from BSI
BSI:
Number of keys learned: 1
Transponder code recognised: yes (changes consistent with beep test)
BSI matched: yes
Key in the ignition position: yes
Engine control unit locked: yes
The relay in the engine fusebox is clicking, there are 0.5-1Amps going through the fuse F8 when ignition is on.
I've done a myriad of tests, from wire tracing, to fuel pressure and injector leak-off. Headbutting the wall at the moment
Best is if you ask what tests should be run, and I'm pretty sure I'll have the outcome readily
Here's the list of ECU faults (that fail to clear for some reason), the first one being the prime suspect, as I think all the rest should not cause a non-start condition/locked ECU, as per online researches:
Multiplexing No communication with the BSI
P0483 Engine cooling function integrated into the engine control unit Open circuit or actuator malfunction
P0183 Diesel temperature signal Open circuit or short circuit to +ve
P0313 Clutch switch signal Consistency with vehicle speed
P3007 Flowmeter signal Low air flow sensor signal (due to airbox removed)
P1505 Impact detection Impact information sent by the air bag
P0221 Accelerator pedal signal 1 fault. Consistency with accelerator pedal signal 2
P0382 Preheating relay circuit fault. Plugs permanently supplied
P0226 Accelerator pedal signal 2 fault. Consistency with accelerator pedal signal 1
P0342 Camshaft Position Sensor "A" Circuit Low DTC (yet cam/crank sync says yes during test data)
Airbag ECU:
Remote intermittent fault. Vehicle speed information
P1505 Impact detection Impact information sent by the air bag
...would prevent a start....?
#3: Re: Non-starter 1.4 HDi: mechanical vs electrical Author: Sim, Location: West CountryPosted: Tue Apr 28, 2020 10:56 am ---- I thought so too, but the car had started a couple of times and that error had already been present.
Also confirmations that P1505 doesn't cause non-start: here, here, and here.
Got the MPPS kit as per pro_steve's instructions on hdi-tuning.co.uk, will obtain the ECU firmware dump and take it from there.
#4: Re: Non-starter 1.4 HDi: mechanical vs electrical Author: Sim, Location: West CountryPosted: Sat May 16, 2020 12:38 pm ---- Update: MPPS could not read off the ECU firmware dump, and it failed to do so with both original BSI+ECU set, and a replacement BSI+ECU set (which are from a newer 1.4 HDi model with DPF/FAP, but it should still perform the read as the latter pair is in known working order).
Conclusion: original ECU is healthy, and the problem is in the wiring loom or in one of the sensors/components jamming the CAN bus or shorting some circuit. As you can see from the faults list there are a couple of offenders - engine cooling, diesel temperature, and preheating relay. Unsure which one's the cause, and which others are only the effect of it.
So next up will be to disconnect those components and see if I can get me an ECU comms back.
PS: the tooling itself is sound: I managed to read off the ECU contents from the other car just fine (2.0 HDi)
#5: Re: Non-starter 1.4 HDi: mechanical vs electrical Author: gazza82, Location: South BucksPosted: Mon May 18, 2020 8:46 am ---- I found the glow-plug relay would throw up odd errors when mine failed on our 1.4hdi .. might be worth starting there!
#6: Re: Non-starter 1.4 HDi: mechanical vs electrical Author: Sim, Location: West CountryPosted: Sat Jun 06, 2020 2:28 pm ---- tl;dr car's alive! (queue the line from the Frankenstein)
Thanks gazza82, I've been reading that glowplugs barely ever come on on the common-rail diesels, so I unplugged the relay and supply altogether whilst "eliminating" bad wiring suspects.
Little did I know that an unplugged glowplug relay causes limp home mode, which the car went into after I started it successfully when reflashing ECU with an immo-off EEPROM.
So the car ran fine, re-plugged relay brought it out of limp home mode as well.
The only problem I was left with is the dreaded ECU and BSI fault respectively:
Multiplexing No communication with the BSI
Permanent fault. Absence of communication with the engine management ECU.
Which resulted in a dead dashboard: no wipers/lights/speedo/RPM/temp gauges.
After lots of huffing and puffing I finally found that dashboard comes into life and all those faults go away after moving the pair of twisted CAN wires short of the black 40-way BSI connector. I think that was the one and only issue all along.
I'll do more in-depth load testing (with some 40W light bulb), then replace the damaged wiring portion and see if it permanently brings things back to normal, I'll also reflash the original EEPROM with the immobiliser back on.
There's still no clear cut explanation, as I had weird false-positive readings when I first (and numerous times after) tested the CAN bus for continuity, but one thing's for sure: the car will be back on the road soon
#7: Re: Non-starter 1.4 HDi: mechanical vs electrical Author: gazza82, Location: South BucksPosted: Sun Jun 07, 2020 8:45 am ---- Not your issue but another problem with the 1.4 hdi is the cat. We kept loosing power ... usually on a motorway, going uphill with an artic up our chuff!!!
Turned out the cat had collapsed and the smaller ball it formed was blocking the exhaust if it rolled a certain way ... must have overheated (or sh*te supermarket diesel) ...
A bit hammer and long steel bar sorted that ... nothing to block it now!!!
#8: Re: Non-starter 1.4 HDi: mechanical vs electrical Author: ekjdm14, Location: CheshirePosted: Sun Jun 07, 2020 11:07 am ---- Agreed, SWMBO's 1.4HDi had the beginnings of the cat disintegrating when I pulled the head for the glowplug fiasco (not quite as bad as yours it had about an inch side to side, but I imagine once the brick becomes loose it's rate of demise is exponential due to the extra room it makes for itself to rattle around).
Needless to say, it met the same fate as yours Gazza. This was about 96k, what mileage was yours on?
The 1.4HDi parts car we got to rebuild the rear quarter of the 1.4i had a very shiny new looking cat on it too and that was on IIRC 104k so maybe a common issue round the 100k mark?
Not so bad really, as these little motors will p1ss emissions without it anyway as long as the shell is there and uncut, and no EGR... I'd have to say looking at the figures, if one of these fails emissions there's something major wrong!
#9: Re: Non-starter 1.4 HDi: mechanical vs electrical Author: gazza82, Location: South BucksPosted: Sun Jun 07, 2020 3:31 pm ----
ekjdm14 wrote:
Needless to say, it met the same fate as yours Gazza. This was about 96k, what mileage was yours on?
The 1.4HDi parts car we got to rebuild the rear quarter of the 1.4i had a very shiny new looking cat on it too and that was on IIRC 104k so maybe a common issue round the 100k mark?
Can't remember the exact mileage but high 80s rings a bell.
ekjdm14 wrote:
Not so bad really, as these little motors will p1ss emissions without it anyway as long as the shell is there and uncut, and no EGR... I'd have to say looking at the figures, if one of these fails emissions there's something major wrong!
It's been through a couple cat-less with no internals but EGR is still there ... the last fail was the rear brake load sensor ... and I have feeling that had been stuck for a while ... A few squirts of a good penetrating fluid, some "whiggling" and a heavy coating of white grease sorted that one ...
#10: Re: Non-starter 1.4 HDi: mechanical vs electrical Author: ekjdm14, Location: CheshirePosted: Sun Jun 07, 2020 9:04 pm ---- Yeh I could've worded that better, I mean they'll pass with both gutted cat AND no EGR (guess it read like I was suggesting they needed the EGR f*cked off in order to pass!)
Ours has done 2 or 3 tests with cat gutted and EGR blocked and always comes back ridiculously low compared to what's allowed. Can't remember exact numbers but seem to recall it was in the order of under 1/10th of what's allowed in all areas so you'd have to have a really ill motor/oily turbo for it to fail really.
The MoT bogey on ours has always been rear brake related too, couple of times handbrake not strong enough & couple of times the compensator valve too. (I do have a complete ABS setup except for front sensors though, from a parts car & always thought I might do that one day and be rid of the comp valve. Have already sacked off the "auto" adjuster part of things as that kept causing problems & once they're set let's face it, a 1.4HDi Style ain't going to be going through much rear shoe in under 5k/year!
#11: Re: Non-starter 1.4 HDi: mechanical vs electrical Author: gazza82, Location: South BucksPosted: Mon Jun 08, 2020 7:03 am ---- On mine it screwed the braking and the rears locked up early!!
#12: Re: Non-starter 1.4 HDi: mechanical vs electrical Author: ekjdm14, Location: CheshirePosted: Tue Jun 09, 2020 9:35 pm ---- Haha had that issue after we first dropped the beam on ours, my calculations for readjusting it were a bit off and it must have thought there was an elephant in the boot!
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A few squirts of a good penetrating fluid, some "whiggling" and a heavy coating of white grease sorted that one ...
