Actron CP7011 User Manual [en, es, fr]
AIR / FUEL RATIO GAUGE
INSTALLATION INSTRUCTIONS
This gauge was designed for 12-Volt, negative
ground electrical systems.It works with 1-wire,
2-wire, 3-wire, and 4-wire oxygen sensors. If your
vehicle is not equipped with an oxygen sensor, an
oxygen sensor kit can be purchased and installed.
Install the sensor in a location where the exhaust
streams from all cylinders meet and as close as
possible to the cylinder head.
PRECAUTIONS
1. Read the entire instructions before proceeding.
2. Route all wiring away from linkages, engine
parts that become hot, or moving parts.
3. Never smoke while working on your vehicle and
always keep a re extinguisher nearby. It should
be rated for gas/chemical/electrical res.
4. Never lay tools on top of the battery or wear
jewelry during electrical work to avoid severe
shorts.
5. Do not touch the wire(s) coming from the
oxygen sensor to power or ground. Do not
use ohmmeter on these wires. Either of these
actions will damage the sensor.
INSTALLING GAUGE
This gauge can be mounted into a surface of your
choice or into a gauge pod.
1. It is recommended that the battery ground cable
be disconnected before any electrical work is
performed.
2. Choose a location to mount the gauge where it
will be viewable from a normal driving position.
3. If you are installing the gauge into a surface (for
example the dashboard) make a 2-1/16” hole
for the gauge. Be sure to check for wires behind
dash. Do not accidentally cut any wires or hoses.
Be sure there is clearance around the hole for
the gauge mounting bracket.
4. Plug the wire harness connector into the
receptacle on the back of the gauge.
5. Insert the wires and the gauge into the mounting
panel or hole.
6. Install the mounting bracket and tighten the
knurled nuts lightly.
7. Position the gauge for best visibility and tighten
the knurled nuts with moderate pressure.
Figure 1
Gauge Mounting
GAUGE
DASHBOARD
BRACKET
NUTS
(KNURLED)
HOOKING UP WIRES
1. Verify that the battery grou nd ca ble is
disconnected before any electrical work is
performed.
2. Connect the red wire to a fuse protected source
of +12 Volts turned on and off with the ignition
key. The fuse box is usually a good place to
start.
3. Connect the white wire to a circuit which is
energized by the headlamp switch or to the tail
light circuit.
4. If desired, drill a 3/8” hole in the rewall, install a
rubber grommet (provided), and feed the black
and green wires through the grommet into the
engine compartment.
5. CONNECT THE BLACK WIRE TO A GOOD
ENGINE GROUND SOURCE. DO NOT
CO NN EC T BL AC K WIRE TO GR OU ND
POINTS UNDERNEATH THE DASH OR
ON THE BODY. FIND A LOCATION ON
THE ENGINE BLOCK. CLEAN RUST AND
PAINT IF NEEDED BEFORE MAKING THE
CONNECTION. USE THE RING TERMINAL
(PROVIDED).
6. Connect the green wire to the signal wire
between the oxygen sensor connector and
the car computer. Do not connect to the wire
between the oxygen sensor and the connector,
as this wire is often shielded. Refer to diagrams
below for selecting the correct connection
point. If the oxygen sensor has 2, 3, or 4 wires,
consult wiring diagram for your vehicle or
contact vehicle manufacturer to identify the
signal wire.
®
Sunpro
15825 Industrial Parkway,
Cleveland, OH 44135, U.S.A.
For warranty information
contact us at:
1-800 228-7667 or www.sunpro.com
Sunpro® is a registered trademark of Snap-On®
Corporation used under license to
SPX® Corporation
©2006 SPX Corporation
0002-000-2910
Figure 2
General Hookup
FUSE
BOX
+12V
POWER
RED
TO ENGINE
BLOCK GROUND
Figure 3 -
1, 2, 3 & 4 - Wire Sensors
1-WIRE
OXYGEN SENSOR
GROUND
2-WIRE
OXYGEN SENSOR
3-WIRE
OXYGEN SENSOR
GROUND
4-WIRE
OXYGEN SENSOR
Figure 4
Oxygen Sensor Operation
WHITE
GREEN
BLACK
AIR/FUEL GAUGE
TO HEAD LAMPS
OR TAIL LIGHTS
CAR
COMPUTER
CONNECTOR
CONNECT GREN WIRE
ON AIR/FUEL GAUGE TO
SENSOR SIGNAL WIRE
SENSOR SIGNAL
SENSOR SIGNAL
SENSOR GROUND
SENSOR SIGNAL
HEATER POWER
HEATER GROUND
SENSOR SIGNAL
SENSOR GROUND
HEATER POWER
HEATER GROUND
HEADLAMP
SWITCH
OXYGEN
SENSOR
for fuel delivery attempting to maintain an ideal
air/fuel mixture for low emissions and good fuel
economy.
GAUGE OPERATION
NOTE: Typical Air/Fuel Ratio Gauge operation is described
below. The operation may vary from vehicle to vehicle.
The gauge measures the voltage produced by
the oxygen sensor and displays it in real time on
a radial, LED (Light Emitting Diode) bar graph.
The LEDs are color coded for ease of viewing and
interpreting the gauge reading.
When the headlights are turned on, the gauge
background illuminates and the LEDs are dimmed
for easy night viewing.
When the key is in the ON position and the engine
is cold and not running, all segments of the gauge
are off.
When the engine rst starts, all segments of the
gauge are off since the sensor needs to warm up to
its operating temperature. The exact time depends
on whether the oxygen sensor is heated (less than
a minute) or non-heated (several minutes) and the
vehicle. On some vehicles the gauge may read
lean right away.
When the sensor reaches its operating temperature,
but the engine still has not reached the operating
temperature when the car computer takes over
(open loop), the gauge will most likely read rich.
When the engine is controlled by the car computer
(closed loop) and the car is cruising, the gauge
segments will swing between rich and lean. On
vehicles with an added oxygen sensor that do not
have a computer the gauge reading will change
depending on the engine condition, but will not
constantly swing like on the computer-controlled
vehicles.
When the throttle is open during heavy load, the
readings will move toward rich.
During deceleration, the readings will be in the lean
zone. During a hard deceleration, the computer
might lean out the mixture to the point where no
LED segments will be lit.
This sensor produces a voltage signal based on
OXYGEN SENSOR
the amount of oxygen it detects in the exhaust
stream. A low voltage (less than 0.4V) indicates a
lean exhaust (too much oxygen). A higher voltage
(0.6 - 1.0V) signals a rich exhaust (not enough
oxygen). The car computer uses the oxygen sensor
A sluggish response of the Air/Fuel Ratio Gauge
TROUBLESHOOTING
may indicate a partially fouled oxygen sensor. If
the sensor degradation is conrmed, the sensor
should be replaced. A lean operation under load
is a sign of improperly functioning fuel delivery
system. This can lead to engine damage.Persistent
rich operation (not under heavy load) can lead to
poor fuel economy, fouled spark plugs, and poor
performance.
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