Hi All,

im still having lots of trouble with the Bmm engine 2010 Skoda scout.

its has new camshaft sensor, new mass airflow sensor new glow plugs new glow plug timer relay. Was running ok but kept going into limp mode and had poor starting excess cranking . Codes on Vcds open circuit glowplugs 1,2,3,4 this get stored intermittent in fault memory.

camshaft sensor intermittent sometimes implausible .

At this point the car is still running.so I decided to check the wiring  to see if I could sort out the remaining 2 faults (glowplugs and camshaft sensor).

i tested new camshaft sensor with a scope working as it should . I stripped back loom to look for chaffs along side of gearbox near starter I pinged out all wiring to the plug behind near side headlamp and shook wiring continuity stayed tested wires for glow plug rail and camshaft wires. 

Next I tested opposite side of plug pinged out camshaft wires at the ecu shaking wiring still all good .

 

next I tested wires to glow plug relay all pinged out good shaking loom.pinged out the two thin wires from glow plug timer to ecu all good .

 

removed ecu took cover off to check for water damage all good no corrosion board looks good.

 

Now this is when I start to lose it 🤷‍♂️🤣

i re assembled everything put ignition on cleared fault codes tried to start 

would not cough or try to start cranking no sign of life checked fault codes in ecu no faults stored ,

tried it a few times 3-4 still not starting still no fault codes ( I noticed steering wheel warning lamp and dpf light on.

tried again this time had stored

005731 control circuit for pd injectors

P1663 shirt to plus mil on.

i squirted in s bit of easy start it started but died suspect injectors not working.

Any help please 🙏🤷‍♂️😂

im nearly at my wits end I might be selling it as spares or repairs at this rate it’s to nice a car to break it needs fixing 😂

 

Any testing / further ways to diagnose advice greatly apppreciated .

please note I didn’t check the injector loom when I stripped the loom as I wasn’t having any problems with it.

injector loom ?

 

 Thanks in advance 👍

 

 

 

PD engine will not start (inhibited) if the cranking revs are too low. This requirement is removed for a hot start.

 

The fact that you have the steering warning light up indicates that the battery voltage is too low.

Easiest way to check your battery is to get someone to give you a jump start from their car battery with their engine running. If it starts, replace your battery.

Isn't that backwards Pik?

 

I seem to recall that mine would start from cold on a very lazy 1/4 turn when it was not likely to make more than a couple of revolutions but people reported that theirs wouldn't hot start unless the crankshaft was whipping round.

 

There were some bodges to overcome the problem, I never suffered but it did seem a weird function to have designed in.

+1 The engine will have issues hot starting if the crankshaft sensor is not reading a given RPM threshold, from cold this doesn't apply.

 

+1 re steering warning light, cranking the engine with a tired battery has momentarily depleted the electronics of power and things act as if the battery has been disconnected so expect window open/close issues until you get the battery supply issue resolved.

 

Have you checked the battery lead clamps and earth points?

14 hours ago, MicMac said:

+1 The engine will have issues hot starting if the crankshaft sensor is not reading a given RPM threshold, from cold this doesn't apply.

 

+1 re steering warning light, cranking the engine with a tired battery has momentarily depleted the electronics of power and things act as if the battery has been disconnected so expect window open/close issues until you get the battery supply issue resolved.

 

Have you checked the battery lead clamps and earth points?

Hi JR and MIc,

thanks for your reply.

i notes the engine appeared to be turning fast however when I connected battery charger this morning the amperage was a bit low.

in the meantime while the battery is charging I decided to to check the injector loom . I removed rocker cover ping all the wires to the terminals on the round twist connector on the side of the head I also wiggled the wiring continuity still good. I also did ohms resistance all wires show 1ohm .

did same on injector terminals continuity on all injectors 1o resistance:

( not sure if injectors should make a circuit when closed) or is circuit broken when the switch opens ?

i then checked the twist plug that attaches to the side of the cylinder head and pinged all wires back to the ecu and wiggled loom all good 🤷‍♂️

I’m losing the will to fix it it’s fighting me 😂😂

mom going to reconnect the twist plug no make sure continuity is going through the plug if it is I’ll build it all back up and see what happens I’m out of ideas now. Maybe ecu ? 

But Vcds shows test results for ecu no faults most of the time until it logged the P1663 .

i also don’t understand why dpf light and steering wheel light are on but not showing any fault codes for these in Vcds.

 

Any more thoughts anyone?

 

 Thanks 

I’ll keep the post updated 👍

17 hours ago, J.R. said:

Isn't that backwards Pik?

 

I seem to recall that mine would start from cold on a very lazy 1/4 turn when it was not likely to make more than a couple of revolutions but people reported that theirs wouldn't hot start unless the crankshaft was whipping round.

 

There were some bodges to overcome the problem, I never suffered but it did seem a weird function to have designed in.

Yes I did get the wrong way round. No excuses apart from memory and long time since I had a 1.9L.

However, it is till worth ruling out the battery.

The only time I have had the steering wheel light on was 1) end of life battery and 2) moisture on the wiring terminals of the convenience/comfort module. The second case can be ruled out here.

Thanks for the heads up I’ll check out the convience module where is that located ?

mine is the 2,0tdi BMM engine.

ill put the fully charged battery back on and see what happens I’ll report back 👍

thanks

16 hours ago, Vstorm said:

Thanks for the heads up I’ll check out the convenience module where is that located ?

 

Mine cleared itself by just opening all the windows to allow it dry out so it is unlikely to be be your cause. On mine it also brought up many other warnings at the same time

I took ecu out and took back off no water damage ?

also ecu tests as oknon Vcds until code drops in 

 

thanks

Hi all can anyone tell me what thecrelay in the engine fuse box does says 100 on it .

dies it have anything to do with injector power supply ? 

Mid so any guidance on how to test or by pass it .

im running out of ideas might be time to send it to the big breakers yard in the sky ☹️😞

I’ve tried some easy start cars starts but stops as soon as easy start is used up. 

So im guessing it’s a fuel issue which is why I was asking about the above another little anomaly I’ve notice.

i removed thecrekay 100 inventive fuse box engine cranks glow plug light didn’t function steering wheel light and dpf light don’t come on .

whenni put relay back in and they’re ignition on and crank dpf lightcsteeribg light and glow plug light blinking but is dosnt start 🤷‍♂️🤷‍♂️

 

Help 😂