Monaco Cayman 2006, Руководство пользователя

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Cayman 2006 Chassis Information — Section 10 • 267
Fuel Sender
The “Centroid” fuel sender has no moving parts and works by measuring capacitance (electrical property)
between inner and outer tubes in the tank. The more fuel between the tubes, the higher the reading. Electronics in
the “hockey-puck” head of the sender convert the capacitance to current to drive the fuel gauge.
The “Centroid” sender has four connections:
1 & 2 - Positive (POS) and Negative (NEG):
Battery
voltage to run the electronics in the sender head.
3 - SEND:
Connects to the SEND terminal of the gauge on
the dash.
4 - ALARM:
Makes a connection internally to the negative
(NEG) terminal when the low fuel alarm level is reached
(when fuel gauge reads about ⅛ of a tank). This turns on
the fuel indicator light on the dash and is not adjustable.
Adjustments:
The “Centroid” sender has two adjustments:
1 - EMPTY:
Adjusts for length of sender. It has been set
at the factory, covered with a sealant and should not be
changed.
2 - Full Adjustment (FULL): The full adjustment can be
used to correct for slight differences between fuel meters.
During installation, it has been factory calibrated and
should not need re-adjustment.
The correct adjustment technique, with a full tank of fuel, is to start with the full adjustment screw completely
clockwise. This should cause the reading to be above full. Adjust slowly, rotate counterclockwise, until the full
mark on the gauge is reached. The intent is to always adjust downscale rather than upscale.
Troubleshooting:
A. Electronic Output:
The sender has a transistorized output to prevent an ohmmeter from getting a
correct reading of its output resistance.
B. Fuel Only:
The sender will not work correctly in conducting fl uids such as water (it will read above full
all the time in water). One possibility is that when there is a constant above-full reading there may be
water in the bottom of the fuel tank.
C. Contact Centroid:
Probably 90% of the return Centroid tests work okay on the bench. If you have
incorrect readings contact Centroid (
telephone: 800-423-3574
, or preferably,
fax: 386-423-3709
) with
the symptoms. A short,”fi ll in the blanks” troubleshooting test is provided to test the sender. It is easier
to fi nd the problem that way than after the sender has been removed from the system, since the problem
is not necessarily with the sender.
090318
RED:
To Gauge
WHITE:
Ground
YELLOW:
Ignition
Full
Adjust
BLUE:
Low Fuel
Indicator