RhinoPower Ltd

TechSupport · Guru

RE: Rhinoview v0.91 is released

fordem · Senior Member

I've come across the "automatic transmission" timing - it's documented in the service manual for my Mitsubishi - but - the Suzuki vehicle we're discussing has a manual transmission.

kostuch · Veteran Member

I observed retards when using engine for breaking.
Maybe this is the case?

Also some automatic transmissions directs ecus to retard ignition during shifts (to reduce torque and smooth gear change).

TechSupport · Guru

fordem wrote:
ignition advance varies from 0 to around 38 degrees which I guess is within reason, I did see at -5 at one point which looked odd.

I've just been going through the Metro code and the ignition timing looks to be limnited to values between -10 degrees and 53 degrees, I haven't yet delved any further to determine when the timing goes ATDC.

fordem · Senior Member

Yes VE works, as in - the numbers change as the vehicle moves - from low teens at idle up to 70's & 80's depending on what the driver does.

TechSupport · Guru

I was hoping that I could do a quick fix on the units but I will have to spend some time on that.

Mass Air Flow should be grammes/second as it is Mass not Volume which is l/min, The VAF meters are the type with a flap. One of the changes in 9.1 is to ensure that the units for MAF, IAc and EGR are correctly displayed. The values should be correct, they tally with what a Tech 2 displays, I'll change the value to a float to give better resolution. Does VE work on your ECU? we could possibly use that to check the MAF reading.

Ignition Advance has been checked against the Tech 2 as well, if you can get a timing light on there then that would be good. As you've summised Fix Advance doesn't send a value, it just fixes the advance to allow the CMP to be adjusted, I'll disable data entry.

IAC Adjust Monitor is correct and is in per cent, I don't have any documentation that states what values are realistic.

MPG I haven't looked at yet, once I'm happy that everything else is correct I'll go over that again.

fordem · Senior Member

Rhinoview came up showing mph this time, but, the CTS & ATS were displaying the temp in F even though the display legend showed C - if that's not clear, at startup I was seeing an air temp of 110*C and a coolant temp of 87*C, switching the temp units to F confirmed that because the numbers stayed the same whilst the legend changed, switching back to C shows correct numbers & legends.

MAF now reads but the displays shows g/s, I think you said it should be l/m, I've not much idea what it should be but numerically around 4 at a cold start dropping to 2 as the engine warms, revving the engine with the vehicle stationary does not change it, which is not surprising - there's no real load on the engine.

Igntion advance is now showing 13~15 at idle and will change as the engine is revved - setting fix advance to 10, it displays 5, set it to 5 - I'm beginning to think I'm not supposed to enter a value there, just hit set and let it set it to 5 and then use the timing light to set the CMP sensor.

IAC monitor still shows 407, hitting set with no input changes it to 98, with a slight variance in idle speed and again we see an erratic flash of the check engine light, with no codes being set - I know from previous experience that if this engine is on the verge of stalling for whatever reason, "hamfooted" use of the clutch, the CEL will come on, without setting a code - this may be a similar thing

I did limited "road testing" - although the Speedometer legend is MPH, it actually displays km/h, and like the temp gauges, this can be corrected, by switching units - the mph scaling seems marginally low, but that's comparing it to the needle on my dash, not a GPS, and the MPG sits on 50 without moving - I don't think I'm in a position to do MPG testing as I have no "long" runs, where I can expect to be out of traffic and at steady speeds, planned in the near future - thinking about it, that's really not that easy in this country.

On the road AFM does change I did see it as high as 11 and it may have gone higher, ignition advance varies from 0 to around 38 degrees which I guess is within reason, I did see at -5 at one point which looked odd.

TechSupport · Guru

6-21 in the FSM gives MAF at idle as 1 to 4g/s which is good. IAC Adj Monitor should be 2 to 30% which doesn't tally at all. I do know of someone else who is running a 1902 so I'll ask him what he is getting.

Ignition advance should be 12-16 degrees at idle when fully warmed up so that looks good too.

-- Edited by Rhinoman on Saturday 25th of August 2012 08:56:53 PM

TechSupport · Guru

Timing should be a few degrees away from base at idle, there was an error in the scaling which I've now fixed along with the MAF issue. It looks as if it was only the 1902 definition that was at fault, I've run through all the addresses on the simulator so it should all be good and I have updated RV so please download it again.,

IAC calibration should display the IAC adjust monitor or IAC duty cycle, I've been updating the IAC stuff so I may need to go through that again as those are now two different parameters. On your ECU you should get IAC Flow in litres/min and also the IAC Adjust Monitor which is only usually 'live' when in IAC cal mode.

The MPH/KPH issue should be fixed as well.

fordem · Senior Member

Two questions ...

What does the number displayed for IAC calibration represent? In the dataviewer it says percent, but the actual value in my case was 407, so would/should that have a decimal point and be 40.7%? Is it like a duty cycle?

What range would you expect the ingintion timing on a gasolene engine to be in - the initial timing would usually be - in my experience - anywhere between 5~15* BTDC at idle, but I'm not certain how much would be added by the centrifugal advance and vacuum advance mechanisms - or whatever these are called nowadays (I'm showing my age here aren't I?).

The numbers I saw 134 degrees at idle seem a little much, and this engine presumably has some sort of "light load" advance compensation, I don't want to call it vacuum advance since there is no map sensor.

TechSupport · Guru

The VSS issue I haven't seen but has also been reported by someone else so I'll have to look into that. I did do a lot of testing on the 1902 but I have since made some other changes so I'll go back over the definition, it seems like some of the address mapping or scaling factors have gone awry. from what I understand IAC cal is used to set the duty cycle at 50% and the idle adjust screw is trhen used to set the idle speed to the correct value. Target idle is usually only changed by coolant temperature so its interesting to hear that it also changes with the AC.

fordem · Senior Member

Many thanks

A couple of observations ...

Initially RV came up set for mph, but the displayed showed kph, switching to kph and back to mph will allow it to display correctly, or rather to show the correct units because I have tried it in a moving vehicle yet.

Status flags appear to switch as expected

Actuator controls, I'm not certain about - my vehicle is not fitted with an EGR, target rpms works as expected, changing the IAC calibration by a couple of units up/down causes an idle speed variation and the CEL to flash, but no codes are stored, igniton advance is shown at 134 degrees at an indicated 769 rpm, and fixing it at 10, causes a slight drop in idle speed and the advance then shows 160 degrees.

I'm really not certain how the IAC calibration should be used so I didn't do any dramatic changes - the monitor shows 407, I took it down to 405 & up to 409, for the ignition fix, I assume that is intended for setting the timing which would normally be done at (or around) 10 degrees BTDC hence that choice.

MAF sits at 0 regardless of what I do - as if it's not connected.

Something that I'm curious about - the target idle monitor sits at 752 rpm unchanging as I fiddle with electrical load, blower fan, power steering, etc., but I can hear (and see) the rpm changing (up as the load increases, down as it is removed), it does not change until I engage the a/c compressor, at which time it jumps to 799 - this suggests target idle is not used to compensate for the smaller loads.

All of the above were with my 2.0 GV, which I think is ID 1902, I'll see if I get hold of my sister's V6 Vitara over the weekend.

TechSupport · Guru

Rhinoview 0v.91 is released.

http://www.rhinopower.org/Rhinoview/release/Rhinoview91.zip

Please read the readme.txt contained in the zip file, with the exception of the items listed there all features should be functional for all known ECU ID types. Configuration files are no longer used, please contact me if your ECU is not currently covered. The datalogger will be tidied up and improved in a future release.

Your feedback is appreciated.