General Questions
04/08-2019
Bluetooth No communication
Did buy a new android 8 car radio and will install vems display. I can´t get connection to vems BT. The car radio can see the BT module but not make the connection.
Then i tested a old China 2x sub 9 pin module and it worked fine.
Is there any AT commands i could try?
Vems BT module A226
- If connecting PC DSUB9M to DSUB9M of BT-RS232 module, "cross" cable (2-3 3-2 5-5) is needed (TX=>RX), not a straight-through cable
- you can check the bytes sent from android (if connected)...
- If issued in the first few (30?) sec after powerup, some commands can be used to reconfigure or check config
- AT+PIN (try baudrate other than 19200,8n1 if you suspect it might have been changed accidentally)
- AT+BAUD5
- See RS232 Signal Level
2019-03-20 Round.
Q: How to connect rpm
- We have a distributor with build in amp. goes directly to the ign coil.
- Can we connect directly to the coil
A: Instructions on Round RPM input connection can be found on: http://vems.hu/vt/help/round/round_rpm_input_settings.html
- connecting to coil is not recommended, the round RPM input is not HV capable.
- if a diode is fitted so only the low side switching is passed to round RPM input and HV is blocked, the coil signal can be used
- coil- signal -> (stripe)diode -> round rpm input dsub15-pin#10, use a fast rectifier diode to block the HV current.
Q: Also we like to connect a analog sensor 0-100 Psi.
Trayed the analog wizard but i did not change the values.
- What to type in input calibration?
- What to type in input Offset?
- I like the display to show 0.00 - 6.xx BAR
A: Instructions for analog input calibration for Round can be found on: http://vems.hu/vt/help/round/round_analog_input_settings.html
TNX
Peter
2018-06-25
- Uploaded 1.2.31
- Made a new wiring harness.
- Now i have no lambda data while driving. (EGO call. ?)
- Should i try a LSU 4.2 ?
I have reviewed your log [v3.3_u010045-2018.06.25-21.45.36_31.vemslog], you are not getting lambda reading beacause there is still a problem with the heater and pump control as i explained before (but it seems to have gotten worse now, Ri is not measuring at all).
- If the loom is new and doublechecked
- quickest WB hardware test: test 100 ohm between nernst and pump- (4V), also 100 ohm between nernst and pump+
- and capture vemslog (RPM=0): start heater in "free air calibration" dialog.
- if no conclusion from vemslog review, fire a repair request in webshop to get the ecu diagnosed.
2018-06-23
Lambda EGO flag is flashing
Sensor is new 4.9
Sensor cal. log
http://www.vems.hu/files/MembersPage/PeterJensen/S2/v3.3_u010045-2018.06.23-07.52.06.vemslog
Hello Peter,
I have reviewed your wbo2 warmup log, there is indeed a problem there. Both the Ri and Nerst Dc measurement are oscillating around target not stable like needed and control actuation seems to act in bang-bang fashion.
To rule out any firmware problem (you are running 1.2.33 which is marked internal, not even testing; see GenBoard/UnderDevelopment/FirmwareChanges) i would recommend you upgrade firmware to the latest released which is 1.2.38.
Could you take another log of wbo2 calibration using this firmware ? Thanks! I'll review and provide hints on next steps after.
Best regards,
Dave
21-6-2018
Lambda EGO flag is flashing
Seen that EGO correction is not constand.
Cant see why
LSU 4.9
ECU Audi 3b PnP
Log can be find her
http://www.vems.hu/files/MembersPage/PeterJensen/v3.3_u010045-2018.06.20-18.05.25.vemslog
Hello Peter,
To get an idea whats going on, could you make a vemslog of wbo2 calibration running (no need to take sensor out of the exhaust, just make sure the sensor is cold when starting the calibration) after starting let the log run for at least 5 minutes.
Please link the log here so i can review, we'll work from there; Thanks!
Best regards, Dave
11-06-2018
Problem solved
Serial connection
I replaced max232 and it is now working aging.
Thank you for great support
2018-05-29
Need Help: ECU runs but no serial connection (MAX232 problem suspected if wiring has good ground and no intermittent RX/TX problem).
End user had problems connecting to ecu.
We have tested on 5 pc and many usb to serial connectors.
Problem started as a small issue but got worse over the time and now we have total lost any kind of connection.
ECU 17956
The ecu is running nice in the testbench but no communications.
You can measure and check outside connection and disassemble if that does not solve. Do you have a spare ST232D or MAX232 (SOIC16) IC already ?
I really need to get his car up and running so please help.
- If you carefully checked connection TX, RX and GND ground connections (really, do not just assume that connections are good because it worked before; sometimes it communicates with insufficient ground, or intermittent conn causes very same symptom)
- we send MAX232 (or ST232D) for no extra charge for fastest solution
- a hot-air blower and a small piece of Al foil needed to make a rectangular window around the chip to protect surroundings (remove the chip with tweezer gently, with "no force", only after really melted)
- 99% that MAX232 chip replacement solves the problem, if connections are really good). +100 EUR (off listprice next purchase) if solved on site
- we send MAX232 (or ST232D) for no extra charge for fastest solution
30/1-2018
Haw to connect flex fuel sensor to pcb 3.8
ECU 9952
How to connect GenBoard/VerThree/FlexFuel sensor to the "SCL" of v3.8 pcb
- note: 2nd wheelspeed available on pin if ECU ordered with 2nd wheelspeed, eg EC10/pin6 below (or is that a separate project ? Please never mix different projects on same page, please create separate page)
- check the paper docs received with the device.
- Safe to feed frequency or other 0-5V signal with 1k to unknown EC10 or other pins (and see wheelspeed [analog input] reactions in VemsTune)
See GenBoard/VerThree/Schematic to connect to port SCL
- check in the schematic which AVR pin, and measure if at least the protection resistor is there. [On v3.8 filter and protection is embedded in PCB]
- see InputTrigger/WheelSpeed Second Wheelspeed input and any references, eg. SubaruEj
- Note: normally wheel speed 2 is wired to EC36 pin 30
- this pin also goes to p259
- no NEED to cut the p259 trace, the p259 output does NOT pull to GND (or do anything) if not activated.
- so wiring SCL to EC36 pin 30 can be done without tracecut.
- only start any such modification if willing to follow the schematic to verify any hint, and avoid static electricity damage
BMW 88 pin Boost valve
We need to connect a N75 boost valve to this 88 pin ecu but what pin will we connect to?
Econoseal 10 pin connector
Pin 8 and 9 Extra output with flyback.
- What does it mean ? (p259 or inj-FET or what ?)
- exactly as written, same as in VemsTune
- so in VemsTune, outputs menu select boost control and choose
- Extra output 5 if you connected to "Extra output 5"
- Extra output 6 if you connected to "Extra output 6"
Round only AIM
Hi
Setting up aim coolant temperature something goes wrong while temp goes form 99 to 100 degrees. Should be 100 but at the display i can see number 180. I have used the predefined values and working great until it gets to 100 degrees.
Firmware version 0.5.3