Controller Sensor Selection: IMPORTANT!
The unit is designed to work with both NTK and Bosch
wide-band oxygen sensors. However, the controller must
be configured for the particular sensor. This is simply done
with the brown “jumper loop” that is external to the unit. If
an NTK sensor is used, the brown wire should not be cut
and should “loop” in and out of the box. If a Bosch LSU4
sensor is used, this loop must be cut. The open ends
should have heat shrink applied so that they do not touch
any ground. If this is not done, the unit will read incorrectly
and damage may result.
534-188 kits should have the brown wire intact, not cut. 534-197 kits should come with the brown wire pre-cut and heat-shrunk.
Check to make sure this is correct.
Software Setup:
When using a wide-band controller in closed-loop mode, settings in the “Closed Loop Parameters” must be correct
1) The “Wide-Band O
2
” box must be selected.
2) The Air/Fuel vs. Voltage table must be properly set. See the 199R10149-6/7 manual (page 39) for the proper settings.
3) The Target Air/Fuel ratio table must be properly entered. See page 39 or the 199R10149-6/7 manual.
System Tuning:
Comprehensive tuning information is contained in the 199R10149-6/7 manual.
Error Codes:
There is an LED light on the front of the unit. This light gives the status of the unit. It can be read as follows:
LED ON SOLID – Sensor heating normally or is active.
LED SLOWLY BLINKING (once every 2 seconds) – Sensor is too hot, too cold, or slow to heat up.
LED FAST BLINKING (once every half-second) – Sensor is not connected or other error.
Wide-band Controller/Sensor Versions:
Holley has produced several different versions of controllers and sensors with different compatibilities. This section overviews
these. Due to the different connectors, it is not possible to connect a Gen 1 sensor or controller to a Gen II or Gen III sensor or
controller. Compatibility is ensured.
This kit comes with a 3
rd
Gen Controller and 2
nd
Gen NTK (534-188) or Bosch (534-197) sensor.
Controllers
1
st
Gen Controller – 1
st
Gen controllers can quickly be identified by the long O2 sensor harness that is attached to the controller
and is not removable. All of the wires are of various colors as well.
2
nd
Gen Controller – 2
nd
Gen controllers can quickly be identified by the use of a separate O2 sensor harness. All wires in this
unit are black. It has a 3 wire weather pack connector for the C950 connection, a 4 wire weather pack connector for a display,
and the 8 pin connector for the O2 sensor.
3
rd
Gen Controller – The 3
rd
Gen controller is similar to a 2
nd
Gen controller, except that it is much smaller and has some
different cabling. It has a 3 wire weather pack connector for the C950 connection, a black 2 wire connector for a gauge, an
orange 2 wire connector for a C.A.N. connection (not used at this time), and the 8 pin connector for the O2 sensor.
Sensors
1
st
Gen NTK Sensor – The 1
st
Gen NTK sensor has a connector that can only be plugged into a 1
st
Gen Controller
2
nd
Gen NTK Sensor – The 2
nd
Gen NTK sensor has a connector that can only be plugged into a 2
nd
Gen Controller or extension
harness.
Bosch Sensor – This sensor can be used with a 2
nd
or 3
rd
Gen Controller (brown jumper wire must be cut).
Gauges:
A 2-1/8” gauge (Holley P/N 534-200) is available so you can read the air/fuel ratio in the vehicle at all times. This is for 3
rd
Gen.
controllers only. 1
st
and 2
nd
Gen controllers can use a gauge or display from FJO Racing Electronics (www.fjoracing.com).
199R10323-1
Date: 7-31-06
