Bosch LSU4.2

[Bert Bakker]

I just uploaded in the incoming dir:

  - LSU4_overview.pdf
  - Bosch_LSU4.2_data_sheet.pdf

The first doc shows the possible connector and wiring configurations with
the corresponding part numbers.
The second is a LSU datasheet, but it is in German. The English version is
somehow not available....

Bert


 | -----Original Message-----
 | From: owner-diy_efi at diy-efi.org [mailto:owner-diy_efi at diy-efi.org]On
 | Behalf Of Bernd Felsche
 | Sent: dinsdag 30 oktober 2001 9:52
 | To: bernie at flywheel.innovative.iinet.net.au
 | Subject: Re: 6 wire O2 sensor?
 |
 |
 | I wrote earlier:
 | > Shannen Durphey tapped away at the keyboard with:
 | > > Bernd Felsche wrote:
 | > > > Any pin-outs/wire colours known for heater, pump and
 | Nernst cells?
 | > > >
 | > > > We _can_ get these sensors in Australia. About AUD$300
 | + GST retail IIRC.
 |
 | > > Funny, I just pulled the cover off the connector again and looked
 | > > at the cal.  resistor.  Even pulled out the DVOM for a
 | > > measurement.
 |
 | > > And about a month ago I pulled the cover off the control
 | box/ data
 | > > acquisition unit that it's supplied with, just for a look see.
 |
 | [snip]
 |
 | > I've been trying to get (more) data on the wideband Bosch sensors
 | > for over a year. I have some more data now; most of which is on the
 | > DDL web page, as much as I'm willing to stick my neck out without
 | > breaking any laws. (e.g. I'm not including SAE papers, or chapters
 | > from books.)
 | >
 | > So; how is the sensor wired to the plug? What's "common" that isn't
 | > on the NTK/NGK? Is the cal resistor(-) common with heater(-)?
 | >
 | > Careful with the multimeter; the Nernst cell can only take
 | > continuous DC of < 10uA.
 |
 | [snip]
 |
 | Recently (this afternoon) found some more info.
 |
 | Nominal Nernst _cell_ resistance (measured by alternating square wave
 | of 1 to 4kHz) is 80 ohms, at a _cell_ temperature of 750 degrees C
 | when new...
 |
 | In case you're still wondering how those pins are connected,
 | the pinouts and wires for an LSU 4.2 are as follows:
 |
 | 			Likely
 | Pin	Wire	Symbol	Function Description
 | ---	------	------	-------- -------------------
 |   1	black	Re+	Vs+	 Nernst voltage
 |   2	green	Rt	Rcal	 Calibration (trim) resistor
 |   3	grey	H+	H+	 Heater + (Vbatt)
 |   4	white	H-	H-	 Heater pulse
 |   5	yellow	IPN	Ip-/Vs-	 Virtual ground
 |   6	red	APE	Ip+      Pump current
 |
 | Please VERIFY that this is correct before you play with the sensor!
 |
 | Shannen,
 | Is the other side of the calibration resistor also common to the
 | virtual ground pin or the heater pulse?
 |
 | I should be able to find some matching connectors at a VAG dealer.
 | Part numbers to follow.
 |
 | --
 |  /"\  Bernd Felsche - Innovative Reckoning, Perth, Western Australia
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