Official Scangauge II Thread - Share your Data, Discuss Settings ,Problems, Findings! - Page 7 - Toyota Yaris Forums

BailOut · 08-16-2007, 08:26 PM

The SGII cannot definitively show a DFCO mode because there are no OBDII codes for fuel injection. As such, each manufacturer makes their own codes, and as of today they are proprietary.

I'm not sure why anyone would doubt the existence of DFCO. It's not science fiction. It is documented in many places, and can be tested by any individual using what I outlined here. It's a simple concept, and whether a car has DFCO or not is highly obvious when the test I outlined is performed on a vehicle that doesn't have it (when I tried it on my rental Aveo (I can't believe GM actually produced this car... no thought, no soul, no reliability, CELs at the drop of a hat, etc...) its AT immediately went into a protective mode, and when I tried it on our old Tacoma it was like driving through a meter of water).

There are even varying levels of DFCO. One of the rental cars I got stuck with when my Yaris' door was being repaired was a POS GMC Canyon pickup. It was a real PITA to drive down the mountain because (aside from handling like an overweight marshmallow that would understeer or oversteer but never rail a turn) it took like 3 or 4 seconds of engine braking to start DFCO, but only half of the 6 cylinders. Then, after 8 - 10 seconds more, it would shut the rest of them off. It made for some rather unpredictable but inevitable engine braking.

Pavel Olavich · 08-17-2007, 07:44 AM

Quote:

Originally Posted by BailOut

The SGII cannot definitively show a DFCO mode because there are no OBDII codes for fuel injection. As such, each manufacturer makes their own codes, and as of today they are proprietary.

I'm not sure why anyone would doubt the existence of DFCO. It's not science fiction. It is documented in many places, and can be tested by any individual using what I outlined here. It's a simple concept, and whether a car has DFCO or not is highly obvious when the test I outlined is performed on a vehicle that doesn't have it (when I tried it on my rental Aveo (I can't believe GM actually produced this car... no thought, no soul, no reliability, CELs at the drop of a hat, etc...) its AT immediately went into a protective mode, and when I tried it on our old Tacoma it was like driving through a meter of water).

There are even varying levels of DFCO. One of the rental cars I got stuck with when my Yaris' door was being repaired was a POS GMC Canyon pickup. It was a real PITA to drive down the mountain because (aside from handling like an overweight marshmallow that would understeer or oversteer but never rail a turn) it took like 3 or 4 seconds of engine braking to start DFCO, but only half of the 6 cylinders. Then, after 8 - 10 seconds more, it would shut the rest of them off. It made for some rather unpredictable but inevitable engine braking.

I tend to agree with you, however I don't see a need for a special code to signify DFCO, because if DFCO is in process, then the injectors are no longer feeding gas, so then the GPH should be zero, yea? I've got an auto tranny in my Yaris, by the way, and I think DFCO works in conjunction with the grade logic, and torque converter lock up processes, but I can't be so sure. Yet.

By the way, that POS Chevy Aveo is not made by Chevy....it's Korean (Kia or Hyundai)...it's a rebadged POS, for sure...it cost less then our Yaris, but the cost of ownership over 5 years is much more.

A bit off topic, but what kind of oil do you run? What is your change intervals?

Thanks!

BailOut · 08-17-2007, 11:24 AM

The SGII's GPH reading isn't done directly from a flow meter or anything. It is inferred by your RPM, speed, and air flow. This is why you still see ~0.2 GPH when in DFCO... that's the closest the SGII can get according to its internal math as you're still producing high RPM.

Check your PMs for my oil metrics. I don't want to derail this thread.

Pavel Olavich · 08-17-2007, 01:47 PM

Quote:

Originally Posted by BailOut

The SGII's GPH reading isn't done directly from a flow meter or anything. It is inferred by your RPM, speed, and air flow. This is why you still see ~0.2 GPH when in DFCO... that's the closest the SGII can get according to its internal math as you're still producing high RPM.

Check your PMs for my oil metrics. I don't want to derail this thread.

I was under the impression that the GPH value was input to the ScanGauge II via the ODB port, and not calculated by it....I certainly could be wrong however.

Appalachian Trail 2007 · 11-12-2008, 09:34 PM

Quote:

Originally Posted by Pavel Olavich

I tend to agree with you, however I don't see a need for a special code to signify DFCO, because if DFCO is in process, then the injectors are no longer feeding gas, so then the GPH should be zero, yea? I've got an auto tranny in my Yaris, by the way, and I think DFCO works in conjunction with the grade logic, and torque converter lock up processes, but I can't be so sure. Yet.

By the way, that POS Chevy Aveo is not made by Chevy....it's Korean (Kia or Hyundai)...it's a rebadged POS, for sure...it cost less then our Yaris, but the cost of ownership over 5 years is much more.

A bit off topic, but what kind of oil do you run? What is your change intervals?

Thanks!

It's a Daewoo rebadged to a Chevy

dawasherpa · 08-17-2007, 01:22 PM

I bought the scangauge II and tried plugging it into my 2007 Yaris MT. I had the key ON and also tried with the engine running, but all i got was "Connecting...." and never quite connected. I would like to know if anyone has had this problem.

Thanks

BailOut · 08-17-2007, 02:06 PM

Quote:

Originally Posted by dawasherpa

I bought the scangauge II and tried plugging it into my 2007 Yaris MT. I had the key ON and also tried with the engine running, but all i got was "Connecting...." and never quite connected. I would like to know if anyone has had this problem.

Thanks

I've never seen this issue but I would try re-seating the OBDII connector as it sounds like it might not be a solid connection.

If it still doesn't work then I'd try completely disconnecting everything for an hour or so, then hooking it back up and immediately starting the engine. This will give it the best chance for making that initial connection.

If it still doesn't work at that point you should take your car to a local shop and ask them to hook their reader up, just to see if theirs works or not. If it does you know you have a bad SGII and you can RMA it. If it doesn't you know you need to take the Yaris to the dealership to get the OBDII port working.

dawasherpa · 08-19-2007, 04:34 PM

Quote:

Originally Posted by BailOut

I've never seen this issue but I would try re-seating the OBDII connector as it sounds like it might not be a solid connection.

If it still doesn't work then I'd try completely disconnecting everything for an hour or so, then hooking it back up and immediately starting the engine. This will give it the best chance for making that initial connection.

If it still doesn't work at that point you should take your car to a local shop and ask them to hook their reader up, just to see if theirs works or not. If it does you know you have a bad SGII and you can RMA it. If it doesn't you know you need to take the Yaris to the dealership to get the OBDII port working.

Reseating the connector did not work. To make sure SG II wasn't the problem, I hooked it up to Dodge Neon of my friends and it worked fine. So, now I know it's the Yaris's OBDII connector. I have scheduled a appointment to look into it, although they were telling me that the SGII may not be compatible with Yaris. But I know SGII is compatible as you guys have it working for you. So, we'll see what the problem is.

Thanks

dawasherpa · 08-31-2007, 03:13 AM

Quote:

Originally Posted by dawasherpa

Reseating the connector did not work. To make sure SG II wasn't the problem, I hooked it up to Dodge Neon of my friends and it worked fine. So, now I know it's the Yaris's OBDII connector. I have scheduled a appointment to look into it, although they were telling me that the SGII may not be compatible with Yaris. But I know SGII is compatible as you guys have it working for you. So, we'll see what the problem is.

Thanks

Turns out, I got a bad Scangauge. The company was nice enough to exchange it for a new one, which worked right away.

Thanks

gonzo452001 · 09-16-2007, 08:51 PM

on my yaris scan gauge says open loop any time i take my foot off the gas pedal as soon as I give it gas it say closed loop this is all the time not just when the engine is cold is this normal?

enkid · 09-16-2007, 10:09 PM

Edit 9/18/07, additions/corrections

Yes, it's normal. In fact it's our DFCO indication for the Yaris. Here's why:

DFCO is by definition, an Open Loop condition, because it's a fuel cutoff. Closed loop is when the computer is using signals from various sensors to meter how much fuel to inject. At the same time, the amount of fuel injected is one of the things that creates the conditions that determine what the signals will be from those sensors. In other words, it's a closed control loop. DFCO overrides this and cuts off the fuel injectors.

If you see Open Loop any other time, except briefly after a cold start, or briefly if you're drag racing or under very heavy load like climbing a steep hill, then something is probably wrong and most likely the check engine light will come on....and a trouble code will be waiting for the scanner function of the scangauge to read.

If you were driving a manual transmission, you'd find it will also switch back to Closed Loop when the engine speed drops below about 1000RPM with it in gear and your foot is off the gas pedal. At the same time you'd feel a very slight surge of power. That's DFCO switching out to keep the motor from stalling. Then you'd quickly have to stomp on the clutch and throw it into neutral, or into low gear and go....or it'll stall anyway.

On the other hand, scangauge fuel consumption calculation is unaware of DFCO, so it registers higher consumption than if you were in neutral. In my case, this helps offs offset consumption error calculation in the other direction.

I have a 96 Chevy conversion van which sat with a dead transmission and engine problems for 2 years. I've been reviving it this summer....the SG came in really handy diagnosing....and I was surprised to find it too, has DFCO.

andries · 11-06-2008, 03:46 PM

ScanGauge gives by the abbreviaton "MAP" no value ( Yaris 1.8 TS)

Can someone tell me whether that is normal?
Has the Yaris no sensor for the "MAP" value?

Thanks

365Motorwerks · 11-06-2008, 03:58 PM

Quote:

Originally Posted by andries

ScanGauge gives by the abbreviaton "MAP" no value ( Yaris 1.8 TS)

Can someone tell me whether that is normal?
Has the Yaris no sensor for the "MAP" value?

Thanks

Correct MAP and FPR both don't display as the ECU won't give a value.

Revsson · 11-12-2008, 12:11 PM

Where is the best place to buy a ScangaugeII nowadays? I thought I saw something
before the hack about a group buy?? or one of our vendors ??

365Motorwerks · 11-22-2008, 12:26 PM

Quote:

Originally Posted by Revsson

Where is the best place to buy a ScangaugeII nowadays? I thought I saw something
before the hack about a group buy?? or one of our vendors ??

I did the group buys a while back and I'm back as a vendor with ScanGauges a-plenty. Checkout the sponsored sales area for my posts.

cali yaris · 11-12-2008, 09:28 PM

from me. I cannot advertise my price due to manufacturer restrictions, but...

.... I'll be so HAPPY to receive your PM

Revsson · 11-13-2008, 12:53 PM

Quote:

Originally Posted by cali yaris

from me. I cannot advertise my price due to manufacturer restrictions, but...

.... I'll be so HAPPY to receive your PM

PM sent.

andries · 11-28-2008, 02:24 PM

Is it possible to change the $ sign into the € sign on a ScanGauge?

08-16-2007, 08:26 PM	#1
BailOut Steals terrorist's lunch View User's Garage Drives: 2007 Yaris Liftback Join Date: Mar 2007 Location: Reno, Nevada, USA Posts: 1,299	The SGII cannot definitively show a DFCO mode because there are no OBDII codes for fuel injection. As such, each manufacturer makes their own codes, and as of today they are proprietary. I'm not sure why anyone would doubt the existence of DFCO. It's not science fiction. It is documented in many places, and can be tested by any individual using what I outlined here. It's a simple concept, and whether a car has DFCO or not is highly obvious when the test I outlined is performed on a vehicle that doesn't have it (when I tried it on my rental Aveo (I can't believe GM actually produced this car... no thought, no soul, no reliability, CELs at the drop of a hat, etc...) its AT immediately went into a protective mode, and when I tried it on our old Tacoma it was like driving through a meter of water). There are even varying levels of DFCO. One of the rental cars I got stuck with when my Yaris' door was being repaired was a POS GMC Canyon pickup. It was a real PITA to drive down the mountain because (aside from handling like an overweight marshmallow that would understeer or oversteer but never rail a turn) it took like 3 or 4 seconds of engine braking to start DFCO, but only half of the 6 cylinders. Then, after 8 - 10 seconds more, it would shut the rest of them off. It made for some rather unpredictable but inevitable engine braking. __________________ - Brian Share the Road I often carry 2 carpool passengers and mountain bikes or snowboards/skis over a 4,500 foot elevation difference. Click the graphic above to see my detailed mileage logs.

08-17-2007, 11:24 AM	#3
BailOut Steals terrorist's lunch View User's Garage Drives: 2007 Yaris Liftback Join Date: Mar 2007 Location: Reno, Nevada, USA Posts: 1,299	The SGII's GPH reading isn't done directly from a flow meter or anything. It is inferred by your RPM, speed, and air flow. This is why you still see ~0.2 GPH when in DFCO... that's the closest the SGII can get according to its internal math as you're still producing high RPM. Check your PMs for my oil metrics. I don't want to derail this thread. __________________ - Brian Share the Road I often carry 2 carpool passengers and mountain bikes or snowboards/skis over a 4,500 foot elevation difference. Click the graphic above to see my detailed mileage logs.

09-16-2007, 08:51 PM	#10
gonzo452001 Drives: 3-door liftback blazing blue Join Date: Oct 2006 Location: French Lick,IN Posts: 185	on my yaris scan gauge says open loop any time i take my foot off the gas pedal as soon as I give it gas it say closed loop this is all the time not just when the engine is cold is this normal? __________________ 07 yaris LB 5-speed blazing Blue 07 yaris LB Auto Bayou Blue rostra cruise control oem style foglights 96tacoma 4x4 xcab I4auto Weathertech vent visors Scan GaugeII

09-16-2007, 10:09 PM	#11
enkid Drives: 07 Yaris Sedan Join Date: Nov 2006 Location: RI, USA Posts: 25	Open Loop Edit 9/18/07, additions/corrections Yes, it's normal. In fact it's our DFCO indication for the Yaris. Here's why: DFCO is by definition, an Open Loop condition, because it's a fuel cutoff. Closed loop is when the computer is using signals from various sensors to meter how much fuel to inject. At the same time, the amount of fuel injected is one of the things that creates the conditions that determine what the signals will be from those sensors. In other words, it's a closed control loop. DFCO overrides this and cuts off the fuel injectors. If you see Open Loop any other time, except briefly after a cold start, or briefly if you're drag racing or under very heavy load like climbing a steep hill, then something is probably wrong and most likely the check engine light will come on....and a trouble code will be waiting for the scanner function of the scangauge to read. If you were driving a manual transmission, you'd find it will also switch back to Closed Loop when the engine speed drops below about 1000RPM with it in gear and your foot is off the gas pedal. At the same time you'd feel a very slight surge of power. That's DFCO switching out to keep the motor from stalling. Then you'd quickly have to stomp on the clutch and throw it into neutral, or into low gear and go....or it'll stall anyway. On the other hand, scangauge fuel consumption calculation is unaware of DFCO, so it registers higher consumption than if you were in neutral. In my case, this helps offs offset consumption error calculation in the other direction. I have a 96 Chevy conversion van which sat with a dead transmission and engine problems for 2 years. I've been reviving it this summer....the SG came in really handy diagnosing....and I was surprised to find it too, has DFCO. Last edited by enkid; 09-18-2007 at 11:21 PM.

11-12-2008, 09:28 PM	#16
cali yaris ULTIMATE View User's Garage Drives: 07 Yaris Turbo Join Date: May 2007 Location: Canoga Park, CA Posts: 14,859	from me. I cannot advertise my price due to manufacturer restrictions, but... .... I'll be so HAPPY to receive your PM __________________ Micro Image forums, online store and shop are now closed. It was a great eight year run, but it was time to focus on other things. I'm still selling parts on eBay under micro*image seller ID and customers can still make requests for anything specific.

08-17-2007, 01:22 PM	#6
dawasherpa View User's Garage Drives: 2007 Liftback MT Join Date: Aug 2007 Location: California, US Posts: 5	I bought the scangauge II and tried plugging it into my 2007 Yaris MT. I had the key ON and also tried with the engine running, but all i got was "Connecting...." and never quite connected. I would like to know if anyone has had this problem. Thanks

11-06-2008, 03:46 PM	#12
andries aka Jack Wolfskin Drives: Yaris Join Date: Oct 2008 Location: Spain Posts: 239	ScanGauge gives by the abbreviaton "MAP" no value ( Yaris 1.8 TS) Can someone tell me whether that is normal? Has the Yaris no sensor for the "MAP" value? Thanks

11-12-2008, 12:11 PM	#14
Revsson View User's Garage Drives: 2009 Meteorite Metallic LB MT Join Date: Oct 2008 Location: Southeast Wisconsin Posts: 810	Where is the best place to buy a ScangaugeII nowadays? I thought I saw something before the hack about a group buy?? or one of our vendors ??

11-28-2008, 02:24 PM	#18
andries aka Jack Wolfskin Drives: Yaris Join Date: Oct 2008 Location: Spain Posts: 239	change $ into € Is it possible to change the $ sign into the € sign on a ScanGauge?