Nice one! I wanted to buy from a UK distributor so I have just ordered one from:Stuart wrote: no, the default works fine... (narrow band only has to cycle from >.2V to < .07V)
Did you just wire the wideband O2 sensor's narrowband wire straight to the ECU rather than to the existing sensor's wires? If so which pin? I have looked at Hondata's PRA wiring (below)Maverik wrote:I have Civic Type-R with PRA ECU. I have been running for more than one year without problems with an external wideband O2 module (TechEdge) with dual output. The wide band signal (0-5 V) is connected to ELD pin for data logging, while the narrow band signal (0-1 V) is connected to the primary O2 pin. I'm without CAT so I'm not running the secondary O2. P0135 (O2 heater) and emission error checking (Sec O2, FTP, PA,ELD) have been disabled.
Many thanks Maverik. I'm pretty sure how to do this now :-)Maverik wrote:I have put the wide band module in proximity of the ECU, so I did the following connection:
- "12V supply" to cigarette lighter power cable.
- "Heater Ground" and "System Ground" to cigarette lighter ground (they can also be connected to the inlet manifold earth point).
- "Analog out 2 (wide)" to pin 15 ELD (connector E). I have cut the wire close to the connector E.
The primary O2 has been replaced with the wide band O2 sensor, so A6 (white wire) has to be connected to "Analog out 1 (narrow)" and the heater wire A1 of primary O2 is unplugged.
Yeah, if I set the voltage offset in KManager at -0.6 the AFR readings from analog 2 are close to the readings from the serial connection. I'm going to improve the grounding and ECU connections this evening and see how it goes. I'll also program both outputs to flat line at a set voltage to check the expected voltages are entering the ECU.Stuart wrote:Calibration for the (default) LC-1 should be:
0V = 7.35 AFR
5V = 22.39 AFR
applying this makes it look silly lean, so either the sensor has not been calibrated (should do this is free air before it's installed - see LC-1 manual) or the ELD voltage is offset from the LC-1 output...
way to check is to use a meter on the output and verify that the ELD votale is the same as the output from the LC-1 (Brown) also check that there is not a ground issue by checking the LC-1 ground (white) against the ECU ground (pins 4 & 5 ECU A).
if that checks out, then use a laptop connected to the LC-1 and compare the reading with the ELD voltage and the (displayed) AF from Kmanager
looking at your log, it's some 0.6V off (too high)
The sensor has been calibrated as the serial output AFR is correct. ELD voltage is the same as the output from analog 2. There is 0.000 ohm / 0.000 volt between LC-1 white and blue wires and pins A4 & A5, and ECU earth and case. I'm wondering if something else in the car is causing the voltage offset... I'll try disconnecting my CarPC and using the laptop to compare the serial and analog outputs. I need to buy a USB-serial cable for my laptop now :-( If it is the CarPC causing the interference it would kinda make all this pointless as I use it to display the AFR gauge! Unless I can suppress the interference...Stuart wrote:Calibration for the (default) LC-1 should be:
0V = 7.35 AFR
5V = 22.39 AFR
applying this makes it look silly lean, so either the sensor has not been calibrated (should do this is free air before it's installed - see LC-1 manual) or the ELD voltage is offset from the LC-1 output...
way to check is to use a meter on the output and verify that the ELD votale is the same as the output from the LC-1 (Brown) also check that there is not a ground issue by checking the LC-1 ground (white) against the ECU ground (pins 4 & 5 ECU A).
if that checks out, then use a laptop connected to the LC-1 and compare the reading with the ELD voltage and the (displayed) AF from Kmanager
looking at your log, it's some 0.6V off (too high)
What is your sensor programmed to output on the analog 1 simulated narrowband output? Mine is at the default 1.1V = 14 AFR and 0.1V = 15 AFR. The car runs for a bit then starts to splutter. Maybe the LC-1's default narrowband signal is not correct for my car. Also, the ELD pin is not reading the voltages correctly from my LC-1. If I set the LC-1 to flatline a 2.000V signal at all AFR readings, I read 2.038V using the multimeter when the output is connected to nothing else. When I connect it to ELD pin the voltage jumps to 2.690V. If I disconnect the analog out from the ELD pin again the ELD pin reads 4.65V when connected to nothing! I reconnect it and it reads 2.690V. Perhaps Honda changed the use of this ELD pin on the face lift 2004- CTR?Maverik wrote:My car is a Civic Type R year 2002