- GenBoard/Manual/WideBandHardwareTest : v3 hardware testing (includes pump+ and nernst calibration) step-by-step guide
- GenBoard/Manual/WBSensor for generic LSU4 information
There are many similar types. Often the difference is just the length of the cable.
- 0258007 all seem good. U-shape 2x3 pin Junior-Timer connector
Here is a link about the pinout of the WBO2 sensor with the little connector. Theese sensors used by MOTEC.
- [drawing for the \"6066\"] sensor that only differs from our standard type in the connector (straight, 1x6 instead of the U-shape 2x3). Colors match (Bosch was consistent)
Bosch LSU4.7 / 4.2 Technical specification
LSU4.9 - with smaller connector
- 0 258 017 025 [bosch-motorsport datasheet]
- with connector 1 928 494 687 (physically same as NTK connector)
- different pinout than the tradition big-connector !!! see datasheet
- same as NTK? TODO: check
This (currently not used by us) sensor has smaller (but same "U" shape) connector.
Measurements seem to show that it requires
- significantly higher (twice?) wbo2_ri_target value compared to the traditional sensor.
- higher, appr 2.74mA (+ the current in the RCal) instead of 2.55mA Ip at free air.
- Maybe Bosch installed a bad RCal on the sensor that was measured ?
- Or the sensor was bad ? (it was new!)
- Or this is really different from the big-connector sensor ? The sensor datasheet doesn't seem to mention this.
- maybe behaviour is basically same in the interesting 0.65 .. 1.2 lambda range and only differs in free air. I haven't yet measured this.
If it's used, ever, it requires special care during configuration (since connector is different, this might not be that big problem).
Bosch LSU 4.9 vs. 4.2 (fex. '6066' sensor) indeed differs somewhat technically.
- Exhaust gas temp 930 C vs. 850 C deg (allowable continuous ? - datasheet does not give a clue).
- Heater supply / power; 7.5 V / 7.5 W vs. 9 V / 10 W
- Lambda measuring range from 0,65 vs. 0,70
Mini-LSU 4.9 sensor seems to be (temp etc. vise) similar to LSU 4.2.
Bosch has AWS_LSU 4.9 unit to connect/interface two Mini-LSU 4.9 sensors to CAN.
The connector housing itself is a problem. Only possible to buy from VW (part dealers). The MPT receptracles and small rubber seals shouldn't be a problem.
- item number: VW AG 06e 906 265 F
google search (no success; maybe someone who speaks Japanese ?):
- VW AG 06E 906 265 F
- AG 06E 906 265
- Note that there is NO L1H1 text on this sensor - although otherwise it looks very similar
- ntk sensor 906 265 datasheet
- 5 wires arranged in circle:
- pin1 (no wire, since only in connector) RCal
- pin2 white pump+
- pin3 yellow heater (3.8 Ohm at 25C)
- pin4 grey nernst
- pin5 blue heater (3.8 Ohm at 25C)
- pin6 black (pump-)
- 467 Ohm between pin1 (RCal) and pin2 (pump+ ???). 240 and 287 Ohm in other sensors (we have some in stock because of an ordering mistake ;-)
- note that the LSU4 range is 33 Ohm .. 330 Ohm or so (although this would be no big problem)
- pin1 doesn't seem to have low-owm connection to anything else
PINOUT: This link should give L1H1 pinout: http://techedge.com.au/vehicle/wbo2/wbsumi.htm
http://www.vems.hu/files/MembersPage/LevaiJozsef/ has drawing for the known Bosch:
5,1,6,2 are respectively pump-, nernst, pump+, rcal
(and 3,4 are heater).
The not-so-well-known NTK WBO2 sensor connection:
But no signal names, only pins of an unknown (VAG, audi?) ECU. Might give hint for pump- and nernst. Rcal is very different from Bosch, maybe inverted pump current and rcal ?
NTK sensor with small connector working :
- pin1 Rcal (no wire to sensor). Probably different scheme than LSU4. This is not connected with v3.x (using software calibration)
- pin2 pump+
- pin3 heater
- pin4 nernst
- pin5 heater
- pin6 pump-
In v3.x with pump PI values (instead of orig 0x15, 0x37 that we traditionally use for LSU4) 0x0F, 0x17 reached regulation (This is not tuned in exhaust, just with 0x15, 0x37 pump fluctuated wildly). D=0 as always.
Note that wbo2_calibration=0xB1 was good for NTK_RCAL=287 Ohm. TODO: check if this is close to bosch LSU4 or very different.