Wiring L92 with O2 sensors

[joecar]

Well, the OEM wiring schematic shows different colors than your harness.

Something that might help is the connector endviews, this shows what each pin does, see attached.

[joecar]

For NBO2 signal emulation:

...

Wires from the LC-1 are :
Black
Red --> switch/fused battery power
Blue --> battery ground
White --> NBO2 signal low
Yellow --> NBO2 signal high
Brown
...

Then see this for LC-1 --> V2 serial AFR: serial-port-cable-that-goes-to-v2

Forum member TAQuickness may have one-piece ready-made LC-1 serial cables for sale, see his sig.

[68problemchild]

Thanks so much for the help.

This is pretty confusing.

Any way to take the Lc-1 serial cable 3 wire and put them directly to the orange pins (1, 2, 5?) on the flash scan unit?

[joecar]

No the V2 orange connectors are analog.

The LC-1 serial 3 wire is digital (serial protocol).

Do you have these:
- V2 DB9->RJ6 serial cable,
- LC-1 DB9->2.5mm cable,
- LC-1 2.5mm dead-end terminator plug.

You should have those (they came with your LC-1 and V2)...

then all you need is the orange null-modem adapter show here (under $3.00): serial-port-cable-that-goes-to-v2

You use the null-modem adapter to connect the LC-1 serial cable to the V2 serial cable.

LC-1 SERIAL OUT --> LC-1 serial cable --> null-modem adapter --> V2 serial cable --> V2
LC-1 SERIAL IN <-- 2.5mm terminator

And then on the V2 LCD, you have to go into Options and configure the serial port for LC-1 wideband.

[68problemchild]

I do have those cables.

Roger that. Getting null adaptor but.....

I notice the harness only has ONE 02 sensor female. So I guess that one is for the stock Narrow band I purchased and installed in the drivers side header?

Then I just use the LC-1 set up on the passenger side and log data direct into EFI live?


Thanks again guys. Should be first start in a week or two.

[joecar]

Your harness should have a NBO2 socket for each bank (i.e. two sockets).

The LC-1 wideband function logs directly to EFILive V2 (via the serial cables with null-modem adapter).

The LC-1 narrowband function will be providing the NBO2 signal for one bank...

A real narrowband O2 sensor will provide the NBO2 signal for the other bank...

i.e. your harness should have 2 NBO2 sockets.

[joecar]

Before you install your LC-1 into your vehicle, lay it out on your garage floor, connect it to a car battery (use a fused jumper wire), connect it to V2, power V2 from the OBD-II connector, you should get communications from the LC-1 displayed on your V2's LCD and see that it is reading 20% O2 (i.e air)...

then lightly spray brake cleaner into a rag, and cover the sensor with the rag (the heated O2 sensor gives off heat which oxidizes the brake cleaner), you will see the V2 display a rich reading, remove the rag and V2 displays air again.

Important: the 2.5mm terminator plug is required.

Warning: do not allow the yellow or brown wires to short anywhere, tape each of them up to avoid this.

[68problemchild]

Found pass sensor.

PU high 02
Tan low 02
Grn htr low
PK bat switch

Is what the schematic says from Current performance.

What happens to the remaining two wires from LC-1? eg the black and brown?

Thanks again guys. You all have been really patient.

[joecar]

black -> pushbutton(+) and/or LED anode(+)
white -> pushbutton(-) and/or LED cathode(-)

The LED indicates the state of the LC-1, you may choose not to use this since the state is digitally available from V2.
The pushbutton initiates free air calibration, you don't really need this since it can also be commanded from V2.

brown -> gauge(+) or analog logger(+)
white -> gauge(-) or analog logger (-)

You don't really need brown for anything.

[joecar]

Found pass sensor.

PU high 02
Tan low 02
Grn htr low
PK bat switch

...

Those colors actually match the bank 2 sensor 1 (B2S1) in the .pdf posted above.