2650-1928-77
Installation
1. Disconnect vehicle battery before installation.
2. Mount gauge in 52.4mm diameter hole.
Secure with supplied bracket and hardware.
3. Wire gauge as shown in diagram.
WARNING
Sender Will Get Very Hot During Operation.
CAUTION!
As a safety precaution, the red wire of this
product should be fused before connecting
to the 12V ignition switch. We recommend
using a 3 AMP automotive type fuse.
Connect Data Acquisition Unit and Air/Fuel
Ratio Monitor to a common grounding point
OR
Data Logger
ECU
INSTALLATION GUIDE
52MM WIDE BAND AIR/FUEL RATIO/
LAMBDA MONITOR (BOSCH LSU4.9)
Orange Pro Control Out
Blue
(Optional)
Black/Violet
(Optional)
Violet
(Optional)
Brown
(Optional)
Black/Blue
(Optional)
Carb or
Throttle Body
Wide Open Throttle Switch
(for WOT peak function)
Red Wire(Power):
Connect to a fused and switched 12V positive source that is turned
on and off with the ignition switch. Place a 3 amp automotive fuse
(available commercially) in line with this connection to protect your
gauge. It is recommended that vehicles without alternators connect
this wire to a separate switch that can be swithced on after the
engine has been cranked/fired
(See Sensor Heating Element Section)
Black Wire(Ground):
Connect to good engine ground.
Brown Wire(Optional Peak/Recall & Warning WOT Switch):
Connect to Wide Open Throttle WOT) Switch. Required for
Peak Recall and Alarm/Warning Functionality.
Blue Wire (Optional Data Logger Signal Output):
Connect to signal input(+) or Engine Management System
or Data Acquisition Unit.
Black/Blue Wire (Optional Data Logger Signal Ground):
Connect to signal input(-) on Engine Control Unit (ECU)
or Data Acquisition Unit.
Orange (Pro Control Output):
Connect to the coil of a relay
Black/Violet (Serial Ground):
Connect to the ground pin of a PC or laptop serial port.
Violet (Serial Out):
Connect to the receive (RX) pin of a PC or laptop serial port.
3 Amp Fuse
Red
Black
Throttle Cable
Good Engine
GB
12 V Ignition Switch
Lambda
Sensor
-
+
Battery
Ground