Author Topic: URGENT SERVICE 850 miles New 1400 Eldo (Read 27801 times)

TN Mark · « **Reply #30 on:** June 15, 2019, 08:23:49 PM »

Quote from: pete roper on June 14, 2019, 08:42:21 AM

It's the demand sensor. Get it warrantied.

If I were a betting man I'd say this is spot on. If it's under warranty, let them look into this part asap.

gthorpe · « **Reply #31 on:** June 17, 2019, 10:20:29 PM »

I cleared the fault codes (P0155 & P0156) and did the handle & throttle self learning using GuzziDiag. Unfortunately it didn't solve the problem.

Consistent symptom: "SERVICE URGENT" after turning ignition on when engine is cold; start bike then turn ignition off & on and get "SERVICE"; warm engine up turn ignition off & on and everything is good.

Next step is to take Lucien's advice and look at the throttle control track and demand sensor.

pete roper · « **Reply #32 on:** June 18, 2019, 01:29:58 AM »

It's the demand sensor. Warranty it.

(I'm going to get sick of saying this. When V85's do it I'm going to get even more sick of saying it.)

lucian · « **Reply #33 on:** June 18, 2019, 06:11:54 AM »

PO155 = inconsistant signal from track C-D, the white marked side of demand sensor. Any reading outside of the 600-1400Mv range = bad sensor

Wildguzzi.com · « **Reply #33 on:** June 18, 2019, 06:11:54 AM »

Ncdan · « **Reply #34 on:** June 18, 2019, 07:21:20 AM »

Quote from: lucian on June 18, 2019, 06:11:54 AM

PO155 = inconsistant signal from track C-D, the white marked side of demand sensor. Any reading outside of the 600-1400Mv range = bad sensor

That’s exactly right👍👍👍👍

pebra · « **Reply #35 on:** June 18, 2019, 10:32:01 AM »

Aaargh! I shouldn't have been following this thread!
Now the Griso has started showing the red triangle + service message. Disappears when I switch off, then returns after a while.
2009 8V, 15.700 km, happened twice on the first ride of the season, 100 km.

I'll check in at the Ghetto and see what I find there.

beetle · « **Reply #36 on:** June 18, 2019, 06:18:51 PM »

Check your error codes. Main menu --> Diagnosis

Service code 12425

pebra · « **Reply #37 on:** June 19, 2019, 04:38:47 AM »

Thanks, Beetle! (at a quick glance, I didn't find anything very useful on the Ghetto)

No ECU errors.
Dashboard 08 shows "Memo"

Heated grips mounted before yesterday's first trip of the season.

beetle · « **Reply #38 on:** June 19, 2019, 04:59:54 AM »

Dash 08 is oil pressure sensor.

Check the connector. They can be a bit dodgy.

pebra · « **Reply #39 on:** June 19, 2019, 07:07:11 AM »

hmmmm - tank removal necessary?

LowRyter · « **Reply #40 on:** June 19, 2019, 08:49:39 AM »

Reading this got my curiosity.

So I googled the "Demand Sensor" and found that it's a problem component throughout several Aprilia and Guzzi models. I just wonder why it's such a bad part and whether the manufacturer has improved the reliability or if the replacements are still the same?

kballowe · « **Reply #41 on:** June 19, 2019, 09:05:10 AM »

A few more days, a couple hundred miles, approx 9 starts.
No issues.

Ncdan · « **Reply #42 on:** June 19, 2019, 09:31:23 AM »

Quote from: LowRyter on June 19, 2019, 08:49:39 AM

Reading this got my curiosity.

So I googled the "Demand Sensor" and found that it's a problem component throughout several Aprilia and Guzzi models. I just wonder why it's such a bad part and whether the manufacturer has improved the reliability or if the replacements are still the same?

I can’t remember where I received the information but I was informed that there were a batch of those sensors that had issues and were distributed throughout these bike models and the only way to identify the ones with factory issues is when us unfortunate ones got stuck with them:(

beetle · « **Reply #43 on:** June 19, 2019, 04:15:52 PM »

Quote from: pebra on June 19, 2019, 07:07:11 AM

hmmmm - tank removal necessary?

Yes. Unless you have tiny hands and long skinny arms. No need to completely remove it. Unscrew, lift up, rest on frame, or piece of wood, etc.

kballowe · « **Reply #44 on:** June 26, 2019, 12:26:15 PM »

Dropped the bike off at the dealer today.

The issue was becoming more and more frequent.

1,700 miles now

This bike is a blast to ride. Gremlins notwithstanding

kballowe · « **Reply #45 on:** June 27, 2019, 10:49:40 PM »

How about a short video ?

https://youtu.be/0asMObBDkfU

pete roper · « **Reply #46 on:** June 27, 2019, 11:00:30 PM »

It’s the demand sensor. Warranty it.

gthorpe · « **Reply #47 on:** July 03, 2019, 07:26:30 PM »

This is probably a dumb question: Is the Demand Sensor the Throttle Position Sensor?

pete roper · « **Reply #48 on:** July 03, 2019, 08:07:03 PM »

The demand sensor is a sort of four way TPS. It has four tracks that all have to produce signals that correspond with each other. If they don't it triggers a 'Service' or 'Urgent Service' warning as it means the ECU might incorrectly open the throttle if it were to rely on a single, wrong, reading. It's a four way redundancy to make sure that can't happen.

Pete

drbone641 · « **Reply #49 on:** July 03, 2019, 10:22:02 PM »

Waiting on my nos 16 Eldorado to be delivered and saw this thread. Too funny. I have to remind myself that a hit dog barks. Sorry you are having those issues. I really hope, and expect that it’s an anomaly. Really really hope lol. Oh and The Miami Guzzi dealer is in a dealing

mood.

gthorpe · « **Reply #50 on:** July 04, 2019, 12:29:36 AM »

Finally had some spare time to hook up the GuzziDiag and read the TGPS tracks. A-B were constantly within 100Mv range.

However, C-D difference was ~1,300Mv and the P0155 code was registered. I cleared the fault code turned ignition off/on and read ~1,300Mv C-D difference. Repeated several time with consistent results.

After warming up the engine and cycling the ignition off/on a few times the C-D track difference was <100Mv (and no P0155 fault code).

Key takeaway is P0155 fault is consistently happening after turning ignition on when engine is cold.

So, It looks like I have a bad demand sensor.

pete roper · « **Reply #51 on:** July 04, 2019, 12:46:36 AM »

I'd suggest you are correct.

gthorpe · « **Reply #52 on:** July 11, 2019, 09:54:28 PM »

Quote from: pete roper on July 03, 2019, 08:07:03 PM

The demand sensor is a sort of four way TPS. It has four tracks that all have to produce signals that correspond with each other. If they don't it triggers a 'Service' or 'Urgent Service' warning as it means the ECU might incorrectly open the throttle if it were to rely on a single, wrong, reading. It's a four way redundancy to make sure that can't happen.

Pete

Thanks Pete, I really appreciate your advice & expertise on this.

pete roper · « **Reply #53 on:** July 12, 2019, 01:49:56 AM »

No expertise! I have little experience with the 7SM! In fact Michael and I are having kittens trying to get a Kali Kustom mapped up and getting the TC working properly. Every time it is turned on it defaults to turning the TC off. Not a problem when it's running but boring as you have to turn it on again at every start! It's also not willing to calibrate. I'm sure I'm doing something simple wrong, I just haven't worked out what yet!

pete roper · « **Reply #54 on:** July 12, 2019, 11:09:43 PM »

And so today we go back to this Cali all prepared to remap it after ensuring the TC was on in case it had defaulted to off because of the battery replacement. Anyway, turn the key on, everything is perfect! No more TC issues. Calibrated fine!

Grrrrrrrrrr!

DougG · « **Reply #55 on:** July 14, 2019, 07:58:27 AM »

...everything is perfect! No more TC issues.

Who says that motorcycles don't have personalities!

Be well,
DougG

gthorpe · « **Reply #56 on:** July 23, 2019, 10:44:15 PM »

I just replaced the Throttle Position Sensor with a new one.

Do I need to do anything with GuzziDiag? (resets, etc)

beetle · « **Reply #57 on:** July 23, 2019, 11:19:29 PM »

Handle relearning & throttle relearning, in that order.

gthorpe · « **Reply #58 on:** July 24, 2019, 10:59:17 PM »

I just finished installing the new TGPS (Demand Sensor). I used GuzziDiag to do handle & throttle re-learning and then measured the track voltages:

New TGPS: Track A=1201mV, B=1084, C=3940, D=3848. I cycled the ignition on/off & twisted the throttle several times and took additional readings which were consistent each time. Also no "URGENT SERVICE" warnings and no fault codes.

So far so good! Hopefully this TGPS lasts a long time.

Faulty TGPS readings were: Track A=1123, B=1025, C=3726, D=2470. The high deviation of the C-D tracks was consistent with the P0155 fault code I was getting.

Thanks to everyone on this forum who gave me good advice on diagnosing this problem.

kballowe · « **Reply #59 on:** July 25, 2019, 06:15:03 AM »

Mine is in the shop. Third time. A month or more this time. It's under warranty.

I was told (each time) that it was hooked up to PADS and that "it threw no code".

As of yesterday, it appears that they have the wrong software load on their PADS. There's more, and let's just say that I'm not getting that warm fuzzy feeling about all of this. At this point, I'm nearly ready to buy the part and fix it myself.

More to come.

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Author Topic: URGENT SERVICE 850 miles New 1400 Eldo (Read 27801 times)

pete roper

Wildguzzi.com

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