Faria Serial Bus User manual

Serial Bus
for CorrectCraft®
Pleasurecraft GM Engines
ISO151C ECR#4418 03/08/2004
IS0151
Visual /Audible Alert Messages
Easy Installation
Waterproof Connections
Easy to Read Digital Displays
Easy to use Depth Sounder
Multiple Interfaces
Copyright 2004 by the Thomas G. Faria Corporation, Uncasville, CT USA
No part of this publication may by reproduced in any form, in an electronic retrieval system or otherwise, without
the prior written permission of the company.
Faria® is the trademark of the Thomas G. Faria Corporation
M
M

Index
Initial Setup
Selecting the Fuel Tank Size Page 2
Operation
General Page 2
Speedometer/Depth Sounder
Speedometer Calibration Page 3
Dual Pitot Operation Page 4
Depth Sounder Page 4
Canceling Depth Alarms Page 4
Shallow Alarm Page 5
Deep Alarm Page 5
Keel Offset Page 6
Units Page 6
Speedometer Mode Display Sequence- Figure 1 Page 7
Tachometer/Fuel Monitor
General Page 8
Canceling System Alarms Page 8
Engine Hourmeter Page 8
Hours Remaining Page 9
Engine Temperature Page 9
Voltmeter Page 9
Oil Pressure Page 9
Instrument Lighting Page 9
Tachometer Mode Display Sequence - Figure 2 Page 10
LCD Alarm Condition Displays Page 10-11
Installation/Harness wiring guide for PleasureCraft GM Engines
Gateway Page 13
Gateway Harness connections
Figure 3 Typical Power Connections Page 14
Figure 4 Typical Instrument Connections Page 14
Figure 5 PleasureCraft GM Engine ECU Connection Page 15
Figure 6 Transducer and Pitot Tube Connections Page 15
Figure 7 Miscellaneous Connections Page 16
Wire Harness/Connections - Table 1 Page 17
This page left blank intentionally.

Page 2
M
Mode
Button
Down
Button
Up
Button
Initial Setup
The setup function is normally only used
for a new installation. It is not required to
follow this procedure every time the
instruments are turned on.
The tachometer is used to initialize the
fuel tank size required for the fuel
management function. Press and hold the
“mode M” button while turning the power
on, to enter the “setup” mode.
The LCD will show the current fuel tank
size selection. The choices are displayed
with the “Up” or “Down” buttons. After
selecting the closest tank size, press and
hold the “mode M” button for 3 seconds
to save the selected size and start normal
instrument operation.
Select from one of the following fuel tank
capacity options:
29 gallon
30 gallon (default)
35 gallon
39 gallon
50 gallon
Operation
General
The Faria® Serial Bus™ system is
designed to receive information from the
engine ECU and various individual
sensors throughout the boat. This
information is transformed into digital
data which is distributed to analog and
digital instruments via a single cable
consisting of two shielded, twisted pairs
of conductors.
Each instrument selects the data which is
applicable and displays it as if it was
being received from the sender directly.
One of the two pairs of conductors carries
the data while the other pair of conductors
carry the power for the instruments.
The tachometer and speedometer each
have three push buttons which allow the
different functions of each instrument to
be activated. Following is a description of
these functions.
M
Mode
Button
System
The system consists of:
• One Gateway box to interface with
MEFI IV ECU and external senders
and sensors.
• One 5” Tachometer with Fuel
Monitor
• One 5” Speedometer with Depth
Sounder
• optional second 5” Speedometer
• Various 2” instruments, including
but not limited to
• Voltmeter
• Oil Pressure gauge
• Fuel gauge
• Engine Temperature gauge
• others as specified.
This page left blank intentionally.

Page 3
M
Mode
Button
M
Mode
Button
M
Mode
Button
Down
Button
Up
Button
Speedometer / Depth Sounder
The Serial Bus Speedometer / Depth
Sounder provides both the functions of a
speedometer and a depth sounder. The
analog speedometer is a stepper motor
instrument which looks like a standard
analog device but which is actually a
digital instrument. On small pointer
movements you may occasionally see the
pointer moving in the one third degree
“steps” that represent the accuracy of the
instrument.
Speedometer Calibration
The analog speedometer displays the
speed of the boat through the water. The
speedometer is calibrated at the factory for
normal installations which use a pitot tube
sensor. As significant variation has been
found in various installations, the
speedometer can be easily calibrated to a
known reference such as a radar gun or
GPS. The LCD will display;
When the unit is operating in normal
mode (i.e. pitot status information on the
LCD), push and hold the “mode M” button
down for 2 seconds will cause the
speedometer to go to the calibration mode.
The LCD will show “AdJUST”.
Run the boat at a constant 30 MPH as
measured by the GPS or radar. Adjust the
speedometer pointer by pressing the “Up”
or “Down” buttons until the speedometer
matches the GPS or radar speed.
When finished, press the “mode M” button
to exit the adjustment screen. The operator
has the option of saving or canceling the
adjustment procedure. The options can be
selected using the “Up” or “Down”
buttons. To save the calibration setting,
press and hold the “mode M” button for 2
seconds when the display shows “SAVE”
To exit the adjustment procedure without
saving, press and hold the “mode M”
button for 2 seconds when the display
shows “NO SAVE”. Multiple runs in
opposite directions may be necessary to
compensate for errors due to water
currents.
Notes

Page 4
M
Mode
Button
M
Mode
Button
The speedometer also measures the water
pressure in the pitot tubes when power is
first turned on. This measurement is
subtracted from later readings to correct
for the pressure caused by the weight of
water over the pitot pick-up.
For maximum accuracy, the boat should
not be moving when the key is turned on,
especially in a re-start condition. If the
boat is moving, the pressure in the pitot
will be greater than normal, resulting in
the speedometer reading low.
Dual Pitot Operation
The system is designed to be operated with
two pitot pick-ups for speed sensing. The
speed displayed is based on the pitot with
the highest pressure. On the speedometer
LCD display, the active pitot sensor will be
identified by a “P” or “S”. It is normal to
see the display switch between the port
and starboard pitot sensors, especially in
high speed turns.
Both pitot sensors are continuously
monitored, and blockage in either sensor
will be detected. If a sensor becomes
blocked, the system will switch to the clear
pitot sensor. An “XX” will flash in place of
the “P” or “S” on the speedometer LCD to
indicate which sensor is blocked.
Clean the pitot sensor to restore normal
operation.
Depth Sounder
The depth sounder is turned on and off
with the ignition switch. The depth
sounder can also be turned off at any time,
while in depth display mode, by pressing
and holding the “mode M” button while
the depth sounder counts down a three
second delay.
The depth display will then indicate
“OFF”.
Press and hold the “mode M” button to
turn the depth sounder back on.
The LCD screen displays the depth
sounder data. When there are no alarm
conditions, the water depth is displayed. If
the signal is weak or lost, or there is no
transducer connected, then the display will
alternate between the last known depth
and three horizontal bars.
Canceling depth alarms
A depth alarm warning can be temporarily
canceled by pressing both “Up” and
“Down” buttons on the speedometer,
simultaneously. After one minute, the
Port Sensor - Starboard blocked
Starboard Sensor - Port blocked
Page 17
Table1
Connector Contacts Pin Pin Function Wire Color
P1 2 Not used
P2 4 1 Battery Positive (always on)* Red
2 Ground (Temp. Sender) Black
3 Switched Power from Ignition Purple
switch circuit
4 Ground Black
P3 4 All Faria® Bus Data and N/A
Instrument Power
P4 2 Not Used (PJ0015)
P5 3 Not Used (PJ0016)
P6 3 MEFI IV Engine ECU N/A
P7 3 Not Used N/A
P8 PP Starboard Pitot
P9 PP Not Used
P10 PP Port Pitot
P11 12 3 Navigation Lights Input Dk. Blue
P12 12 Not Used
P13 2 1 Depth Sounder Transducer Blue
signal (AirMar Transducer)
2 Depth Sounder Transducer Black
Ground (AirMar Transducer)
P14 6 1 Fuel Tank Sender Pink
3 Oil Pressure Sender Lt. Blue
5 Water Surface Temperature White
6 Air Temperature White
P15 8 Not Used
*5 amp Fuse Recommended

Page 5
M
Mode
Button
M
Mode
Button
M
Mode
Button
Down
Button
Up
Button
Down
Button
Up
Button
Down
Button
Up
Button
alarm will resume if the condition that
caused the alarm is not corrected. The
operator can cancel the alarm as many
times as necessary, until the condition is
corrected.
The depth alarm warning will replace any
information on the LCD screen. Canceling
the alarm will restore the LCD to the
original display. If not already in the depth
mode, this would be a good time to switch
to it (using the “mode M” button) in order
to monitor water depth.
Depth Sounder Alarm Settings
Note: Speedometer display must be in
depth display mode to change settings.
To change the depth sounder alarm settings
the “mode M” button must be held down
until the depth display changes to the
alarm settings mode.
There are four menus in the alarm settings
mode. Pressing and releasing the mode
switch quickly will cycle through the
different options.
Shallow alarm
Alarm sounds when water depth equals or
is less than the set value.
The display will show “S X.X”
which is the current setting for the shallow
alarm. Pressing the “Up” or “Down”
buttons will change the shallow setting.
Holding the “mode M” button in for 2
seconds will save the new shallow setting
and change the display back to the normal
depth mode. Set to zero to disable alarm.
Deep alarm
Alarm sounds when water depth equals or
is greater than set value.
The display will show “d XX.X”, which is
the current setting for the deep alarm.
Pressing the “Up” and “Down” buttons
will change the deep setting.
Page 16
Figure 7
P15
P13
P12
P7
P8P10 P6
P5 P4 P1
P3 P2
White
Brown
Brown
(Bare)
2
White
Dk. Blue
Nav.
Light
Switch
Instrument
Backlight
Control
P
11
6
5
4
3
2
1
7
8
9
10
11
12
Faria Serial Bus Gateway
Miscellaneous Connections
Pink
Lt. Blue
Oil
Pressure
Sender
Fuel
Tank
Sender
P
14
1
2
3
6
5
4
Air
Temp.
Sender
Water
Surface
Temp.
Sender

Page 15
Page 20Page 21
Faria Serial Bus Gateway
Pleasurecraft GM Engine ECU Connection
Transducer and Pitot Tubes Connections
Figure 6
Figure 5
P15
P13
P14
P12 P11
P10
Black
Blue
Black(shield)
Blue
P7
P8 P6
P5 P4 P1
P3 P2
Black
(shield)
Blue
Airmar Depth Sounder
SN0020
Port Pitot
Starboard Pitot
Page 6
M
Mode
Button
M
Mode
Button
M
Mode
Button
Down
Button
Up
Button
Down
Button
Up
Button
Down
Button
Up
Button
Holding the “mode M” button in for 2
seconds will save the new deep setting and
change the display back to the normal
depth mode. Set to zero to disable alarm.
Keel offset
Adjust depth sounder to measure depth
below keel or drive instead of sensor.
The display will show “K X.X” which is
the current setting for the keel offset.
Pressing the “Up” or “Down” buttons will
change the keel offset setting.
Holding the “mode M” button in for 2
seconds will save the new keel offset
setting and change the display back to the
normal depth mode. The Keel offset is
normally a negative number.
Units
Change the unit of measure.
The display will show “UNIT FT” for feet,
“UNIT FA” for fathoms, or “UNIT M” for
meters. Pressing the “Up” or “Down”
buttons will cycle through the choices.
Pressing and holding the “mode M” button
will save the units shown in the display
will save the units shown in the display
and change the display back to the normal
depth mode.
Down
Button
Up
Button
Meters
Fathoms
Feet (default)
P15
P13
P14
P12 P11
Black
White
Black (Data Ground)
Shield
White (Data)
Shield
(Not Connected)
P7
P6
P5 P4 P1
P3 P2
A
21
C
B
MEFI IV
Engine ECU
P10 P8

Page 7
M
M
M
M
M
M
Speedometer Display Sequence
Figure 1
Quick
Press
Quick
Press
Quick
Press
Quick
Press
Hold
Hold
Pitot Status
Adjust
Save
No Save
Depth Sounder
Shallow
Alarm Set
Deep
Alarm Set
Keel
Offset
Select
Units
Water Temperature
Air Temperature
(optional)
(optional)
Page 14
Faria Serial Bus Gateway
Typical Power Connections
Typical Instrument Connections
P15
P13
P14
P12 P11
P7
P8P10 P6
P5 P4 P1
P3
P15
P13
P14
P12 P11
P7
P8P10 P6
P5 P4 P1
P3 P2
Figure 3
Figure 4
Note: To help reduce moisture
in the gauges be sure to install
plug PJ0018 in all open connectors.
PJ0018
POS NEG
Battery
-+
P2
1
2
4
3
Black
Black
Purple
Red
To Air and Water Temp. Sender Grounds

Page 13
Faria Serial Bus Installation and Wiring Guide (Pleasurecraft Engines)
The system consists of:
• One Gateway box to interface with MEFI IV ECU and external senders and sensors.
• One 5” Tachometer with Fuel Monitor
• One 5” Speedometer with Depth Sounder
• One 5” Optional Speedometer
• Various 2” instruments, including but not limited to
• Voltmeter
• Oil Pressure gauge
• Engine Temperature gauge
• Fuel Level gauge
• others as specified.
Installation
Installation of the Faria Serial Bus system is accomplished as follows:
Gateway Box
The “gateway” box is the central unit of the system. As all of the senders and other
information source peripherals connect to the “gateway”, the “gateway” box should be
mounted in a protected area in the best location to provide the maximum cabling
benefit.
The “gateway” box power cable must be installed to allow connection to “battery
positive” (always on), “battery negative” (ground), and a source of “switched power”
which turns on with the engine ignition switch (see Figure 3 and Table 1).
The “Faria Bus” cable must be routed from the “gateway” box to the instrument panel
area to connect the instruments to the data bus and instrument power (see Figure 4).
The remainder of the connections to the “gateway” box are described below.
Instruments
The instruments are mounted using the provided back-clamps and mounting hardware.
Each instrument comes with a bus connection cable (12”). The main “Faria Bus” cable
from the “gateway” box is connected to the most convenient instrument using either of
the two four (4) pin connectors provided on the instrument case (*except when a Faria
Serial Bus Pilot or a Faria Speedometer-PerfectPass Cruise instrument is installed, see
note below).
Each additional instrument is connected to the previous instrument using one of the
12” bus connection cables. The cable may be connected to either of the two connectors
provided on the instrument case (see Figure 2).
The Faria Serial Bus Pilot and the Faria Speedometer-PerfectPass Cruise instruments are
“end of the bus” instruments. Only the provided four (4) pin connector is to be connected to
the “Faria Bus”. See special instructions for use of the six (6) pin connector on these
instruments.
*NOTE:
Page 8
Tachometer / Fuel Monitor
The Serial Bus Tachometer / Fuel Monitor
instrument provides both the functions of a
tachometer and a fuel - engine monitoring
system. The analog tachometer is a stepper
motor instrument which looks like a
standard analog device but which is
actually a digital instrument. On small
pointer movements you may occasionally
see the pointer moving in the one third
degree “steps” that represent the accuracy
of the instrument.
The tachometer LCD screen displays
several functions. The displayed data
includes “engine hours”, “time remaining”,
“engine temperature”, “oil pressure”, “system
voltage”, and engine alarm conditions.
Pressing the “mode M” button will select
the various functions as shown in
Figure 2.
In order to minimize “false” alarms, the
“low fuel” and “low voltage” alarms only
function when the engine is known to be
running based on the presence of
tachometer data.
Several alarm conditions may also be
displayed in the LCD display when
needed:
1 Low fuel
2 Low oil pressure
3 High engine temperature
4 Low voltage
5 Engine RPM reduction due to engine
controller command
6 RPM limit
7 Knock sensing system malfunction
8 Ignition system malfunction
9 Manifold pressure sensor (MAP)
malfunction
10 Manifold temperature sensor
malfunction
11 Throttle position sensor (TPS)
malfunction
12 Coolant sensor malfunction
Alarm messages will be displayed on the
tachometer LCD display. Messages 1-5 will
also include a flashing red light. All
messages will be displayed until either the
problem is corrected or the operator
manually cancels the warning message.
Canceling system alarms
To manually cancel system warning
messages, simultaneously press both the
“Up” and “Down” buttons on the
tachometer.
This will disable the warning message
temporarily. If the problem is not corrected
in 1 minute (5 minutes for low fuel), the
warning will be displayed again. The
operator can cancel as often as desired.
Engine Hourmeter
Displays the number of hours that the
engine has been operated. The display will
show “XXXX.XHr”.
M
Mode
Button
Down
Button
Up
Button

Page 9
Hours Remaining
The “time remaining” display shows how
many hours the boat can operate based on
the fuel remaining in the tank and the
current fuel usage rate.
Engine Temperature
Displays the Coolant Temperature of the
Engine. There are no adjustments available.
Voltmeter
Displays the System Voltage. There are no
adjustments available.
Oil Pressure
Displays currant Oil Pressure. There are no
adjustments available.
Instrument Lights
The navigation light switch must be on for
the instrument lights to function. The “Up”
and “Down” buttons on the tachometer
control the instrument lighting brightness.
Pressing the “Up” button increases light
intensity.
Pressing the “Down” button decreases light
intensity.
Down
Button
Up
Button
This page left blank intentionally.

Page 10 Page 11
LCD Alarm Condition Displays.
Alarm messages will be displayed on the
Tachometer LCD display. All messages will
be displayed until either the problem is
corrected or the operator manually cancels
the warning message.
Messages will display as a many screens
shown sequentially,
Canceling System Alarms
To manually cancel system warnings
messages, simultaneously press both the
“Up” and “Down” buttons on the
tachometer. This will disable the warning
message temporarily. If the problem is not
corrected in 1 minute (5 minutes for low
fuel), the warning will be displayed again.
The operator can cancel as often as
desired.
Down
Button
Up
Button
Figure 2
M
MM
M
Tachometer Display Sequence
Quick
Press
Quick
Press
Quick
Press
Quick
Press
Hourmeter
Hours Remaining
M
Quick
Press
Engine Temperature
Oil Pressure
Voltmeter
Severe Conditions- Includes a Flashing Red Light
Warnings
Low Battery Voltage (Flashing Red Light)
High Engine Temperature (Flashing Red Light)
Low Oil Pressure (Flashing Red Light)
Low Fuel Level (Flashing Red Light)
RPM Reduction in Progress (Flashing Red Light)
Engine Speed Limiter Active
Knock Detection System Malfunction
Spark Delivery System Malfunction
Manifold Pressure System Malfunction
Manifold Air Temperature Sensor Malfunction
Throttle Position Sensor Malfunction
Coolant Temperature Sensor Malfunction

Page 10 Page 11
LCD Alarm Condition Displays.
Alarm messages will be displayed on the
Tachometer LCD display. All messages will
be displayed until either the problem is
corrected or the operator manually cancels
the warning message.
Messages will display as a many screens
shown sequentially,
Canceling System Alarms
To manually cancel system warnings
messages, simultaneously press both the
“Up” and “Down” buttons on the
tachometer. This will disable the warning
message temporarily. If the problem is not
corrected in 1 minute (5 minutes for low
fuel), the warning will be displayed again.
The operator can cancel as often as
desired.
Down
Button
Up
Button
Figure 2
M
MM
M
Tachometer Display Sequence
Quick
Press
Quick
Press
Quick
Press
Quick
Press
Hourmeter
Hours Remaining
M
Quick
Press
Engine Temperature
Oil Pressure
Voltmeter
Severe Conditions- Includes a Flashing Red Light
Warnings
Low Battery Voltage (Flashing Red Light)
High Engine Temperature (Flashing Red Light)
Low Oil Pressure (Flashing Red Light)
Low Fuel Level (Flashing Red Light)
RPM Reduction in Progress (Flashing Red Light)
Engine Speed Limiter Active
Knock Detection System Malfunction
Spark Delivery System Malfunction
Manifold Pressure System Malfunction
Manifold Air Temperature Sensor Malfunction
Throttle Position Sensor Malfunction
Coolant Temperature Sensor Malfunction

Page 9
Hours Remaining
The “time remaining” display shows how
many hours the boat can operate based on
the fuel remaining in the tank and the
current fuel usage rate.
Engine Temperature
Displays the Coolant Temperature of the
Engine. There are no adjustments available.
Voltmeter
Displays the System Voltage. There are no
adjustments available.
Oil Pressure
Displays currant Oil Pressure. There are no
adjustments available.
Instrument Lights
The navigation light switch must be on for
the instrument lights to function. The “Up”
and “Down” buttons on the tachometer
control the instrument lighting brightness.
Pressing the “Up” button increases light
intensity.
Pressing the “Down” button decreases light
intensity.
Down
Button
Up
Button
This page left blank intentionally.

Page 13
Faria Serial Bus Installation and Wiring Guide (Pleasurecraft Engines)
The system consists of:
• One Gateway box to interface with MEFI IV ECU and external senders and sensors.
• One 5” Tachometer with Fuel Monitor
• One 5” Speedometer with Depth Sounder
• One 5” Optional Speedometer
• Various 2” instruments, including but not limited to
• Voltmeter
• Oil Pressure gauge
• Engine Temperature gauge
• Fuel Level gauge
• others as specified.
Installation
Installation of the Faria Serial Bus system is accomplished as follows:
Gateway Box
The “gateway” box is the central unit of the system. As all of the senders and other
information source peripherals connect to the “gateway”, the “gateway” box should be
mounted in a protected area in the best location to provide the maximum cabling
benefit.
The “gateway” box power cable must be installed to allow connection to “battery
positive” (always on), “battery negative” (ground), and a source of “switched power”
which turns on with the engine ignition switch (see Figure 3 and Table 1).
The “Faria Bus” cable must be routed from the “gateway” box to the instrument panel
area to connect the instruments to the data bus and instrument power (see Figure 4).
The remainder of the connections to the “gateway” box are described below.
Instruments
The instruments are mounted using the provided back-clamps and mounting hardware.
Each instrument comes with a bus connection cable (12”). The main “Faria Bus” cable
from the “gateway” box is connected to the most convenient instrument using either of
the two four (4) pin connectors provided on the instrument case (*except when a Faria
Serial Bus Pilot or a Faria Speedometer-PerfectPass Cruise instrument is installed, see
note below).
Each additional instrument is connected to the previous instrument using one of the
12” bus connection cables. The cable may be connected to either of the two connectors
provided on the instrument case (see Figure 2).
The Faria Serial Bus Pilot and the Faria Speedometer-PerfectPass Cruise instruments are
“end of the bus” instruments. Only the provided four (4) pin connector is to be connected to
the “Faria Bus”. See special instructions for use of the six (6) pin connector on these
instruments.
*NOTE:
Page 8
Tachometer / Fuel Monitor
The Serial Bus Tachometer / Fuel Monitor
instrument provides both the functions of a
tachometer and a fuel - engine monitoring
system. The analog tachometer is a stepper
motor instrument which looks like a
standard analog device but which is
actually a digital instrument. On small
pointer movements you may occasionally
see the pointer moving in the one third
degree “steps” that represent the accuracy
of the instrument.
The tachometer LCD screen displays
several functions. The displayed data
includes “engine hours”, “time remaining”,
“engine temperature”, “oil pressure”, “system
voltage”, and engine alarm conditions.
Pressing the “mode M” button will select
the various functions as shown in
Figure 2.
In order to minimize “false” alarms, the
“low fuel” and “low voltage” alarms only
function when the engine is known to be
running based on the presence of
tachometer data.
Several alarm conditions may also be
displayed in the LCD display when
needed:
1 Low fuel
2 Low oil pressure
3 High engine temperature
4 Low voltage
5 Engine RPM reduction due to engine
controller command
6 RPM limit
7 Knock sensing system malfunction
8 Ignition system malfunction
9 Manifold pressure sensor (MAP)
malfunction
10 Manifold temperature sensor
malfunction
11 Throttle position sensor (TPS)
malfunction
12 Coolant sensor malfunction
Alarm messages will be displayed on the
tachometer LCD display. Messages 1-5 will
also include a flashing red light. All
messages will be displayed until either the
problem is corrected or the operator
manually cancels the warning message.
Canceling system alarms
To manually cancel system warning
messages, simultaneously press both the
“Up” and “Down” buttons on the
tachometer.
This will disable the warning message
temporarily. If the problem is not corrected
in 1 minute (5 minutes for low fuel), the
warning will be displayed again. The
operator can cancel as often as desired.
Engine Hourmeter
Displays the number of hours that the
engine has been operated. The display will
show “XXXX.XHr”.
M
Mode
Button
Down
Button
Up
Button

Page 7
M
M
M
M
M
M
Speedometer Display Sequence
Figure 1
Quick
Press
Quick
Press
Quick
Press
Quick
Press
Hold
Hold
Pitot Status
Adjust
Save
No Save
Depth Sounder
Shallow
Alarm Set
Deep
Alarm Set
Keel
Offset
Select
Units
Water Temperature
Air Temperature
(optional)
(optional)
Page 14
Faria Serial Bus Gateway
Typical Power Connections
Typical Instrument Connections
P15
P13
P14
P12 P11
P7
P8P10 P6
P5 P4 P1
P3
P15
P13
P14
P12 P11
P7
P8P10 P6
P5 P4 P1
P3 P2
Figure 3
Figure 4
Note: To help reduce moisture
in the gauges be sure to install
plug PJ0018 in all open connectors.
PJ0018
POS NEG
Battery
-+
P2
1
2
4
3
Black
Black
Purple
Red
To Air and Water Temp. Sender Grounds

Page 15
Page 20Page 21
Faria Serial Bus Gateway
Pleasurecraft GM Engine ECU Connection
Transducer and Pitot Tubes Connections
Figure 6
Figure 5
P15
P13
P14
P12 P11
P10
Black
Blue
Black(shield)
Blue
P7
P8 P6
P5 P4 P1
P3 P2
Black
(shield)
Blue
Airmar Depth Sounder
SN0020
Port Pitot
Starboard Pitot
Page 6
M
Mode
Button
M
Mode
Button
M
Mode
Button
Down
Button
Up
Button
Down
Button
Up
Button
Down
Button
Up
Button
Holding the “mode M” button in for 2
seconds will save the new deep setting and
change the display back to the normal
depth mode. Set to zero to disable alarm.
Keel offset
Adjust depth sounder to measure depth
below keel or drive instead of sensor.
The display will show “K X.X” which is
the current setting for the keel offset.
Pressing the “Up” or “Down” buttons will
change the keel offset setting.
Holding the “mode M” button in for 2
seconds will save the new keel offset
setting and change the display back to the
normal depth mode. The Keel offset is
normally a negative number.
Units
Change the unit of measure.
The display will show “UNIT FT” for feet,
“UNIT FA” for fathoms, or “UNIT M” for
meters. Pressing the “Up” or “Down”
buttons will cycle through the choices.
Pressing and holding the “mode M” button
will save the units shown in the display
will save the units shown in the display
and change the display back to the normal
depth mode.
Down
Button
Up
Button
Meters
Fathoms
Feet (default)
P15
P13
P14
P12 P11
Black
White
Black (Data Ground)
Shield
White (Data)
Shield
(Not Connected)
P7
P6
P5 P4 P1
P3 P2
A
21
C
B
MEFI IV
Engine ECU
P10 P8

Page 5
M
Mode
Button
M
Mode
Button
M
Mode
Button
Down
Button
Up
Button
Down
Button
Up
Button
Down
Button
Up
Button
alarm will resume if the condition that
caused the alarm is not corrected. The
operator can cancel the alarm as many
times as necessary, until the condition is
corrected.
The depth alarm warning will replace any
information on the LCD screen. Canceling
the alarm will restore the LCD to the
original display. If not already in the depth
mode, this would be a good time to switch
to it (using the “mode M” button) in order
to monitor water depth.
Depth Sounder Alarm Settings
Note: Speedometer display must be in
depth display mode to change settings.
To change the depth sounder alarm settings
the “mode M” button must be held down
until the depth display changes to the
alarm settings mode.
There are four menus in the alarm settings
mode. Pressing and releasing the mode
switch quickly will cycle through the
different options.
Shallow alarm
Alarm sounds when water depth equals or
is less than the set value.
The display will show “S X.X”
which is the current setting for the shallow
alarm. Pressing the “Up” or “Down”
buttons will change the shallow setting.
Holding the “mode M” button in for 2
seconds will save the new shallow setting
and change the display back to the normal
depth mode. Set to zero to disable alarm.
Deep alarm
Alarm sounds when water depth equals or
is greater than set value.
The display will show “d XX.X”, which is
the current setting for the deep alarm.
Pressing the “Up” and “Down” buttons
will change the deep setting.
Page 16
Figure 7
P15
P13
P12
P7
P8P10 P6
P5 P4 P1
P3 P2
White
Brown
Brown
(Bare)
2
White
Dk. Blue
Nav.
Light
Switch
Instrument
Backlight
Control
P
11
6
5
4
3
2
1
7
8
9
10
11
12
Faria Serial Bus Gateway
Miscellaneous Connections
Pink
Lt. Blue
Oil
Pressure
Sender
Fuel
Tank
Sender
P
14
1
2
3
6
5
4
Air
Temp.
Sender
Water
Surface
Temp.
Sender

Page 4
M
Mode
Button
M
Mode
Button
The speedometer also measures the water
pressure in the pitot tubes when power is
first turned on. This measurement is
subtracted from later readings to correct
for the pressure caused by the weight of
water over the pitot pick-up.
For maximum accuracy, the boat should
not be moving when the key is turned on,
especially in a re-start condition. If the
boat is moving, the pressure in the pitot
will be greater than normal, resulting in
the speedometer reading low.
Dual Pitot Operation
The system is designed to be operated with
two pitot pick-ups for speed sensing. The
speed displayed is based on the pitot with
the highest pressure. On the speedometer
LCD display, the active pitot sensor will be
identified by a “P” or “S”. It is normal to
see the display switch between the port
and starboard pitot sensors, especially in
high speed turns.
Both pitot sensors are continuously
monitored, and blockage in either sensor
will be detected. If a sensor becomes
blocked, the system will switch to the clear
pitot sensor. An “XX” will flash in place of
the “P” or “S” on the speedometer LCD to
indicate which sensor is blocked.
Clean the pitot sensor to restore normal
operation.
Depth Sounder
The depth sounder is turned on and off
with the ignition switch. The depth
sounder can also be turned off at any time,
while in depth display mode, by pressing
and holding the “mode M” button while
the depth sounder counts down a three
second delay.
The depth display will then indicate
“OFF”.
Press and hold the “mode M” button to
turn the depth sounder back on.
The LCD screen displays the depth
sounder data. When there are no alarm
conditions, the water depth is displayed. If
the signal is weak or lost, or there is no
transducer connected, then the display will
alternate between the last known depth
and three horizontal bars.
Canceling depth alarms
A depth alarm warning can be temporarily
canceled by pressing both “Up” and
“Down” buttons on the speedometer,
simultaneously. After one minute, the
Port Sensor - Starboard blocked
Starboard Sensor - Port blocked
Page 17
Table1
Connector Contacts Pin Pin Function Wire Color
P1 2 Not used
P2 4 1 Battery Positive (always on)* Red
2 Ground (Temp. Sender) Black
3 Switched Power from Ignition Purple
switch circuit
4 Ground Black
P3 4 All Faria® Bus Data and N/A
Instrument Power
P4 2 Not Used (PJ0015)
P5 3 Not Used (PJ0016)
P6 3 MEFI IV Engine ECU N/A
P7 3 Not Used N/A
P8 PP Starboard Pitot
P9 PP Not Used
P10 PP Port Pitot
P11 12 3 Navigation Lights Input Dk. Blue
P12 12 Not Used
P13 2 1 Depth Sounder Transducer Blue
signal (AirMar Transducer)
2 Depth Sounder Transducer Black
Ground (AirMar Transducer)
P14 6 1 Fuel Tank Sender Pink
3 Oil Pressure Sender Lt. Blue
5 Water Surface Temperature White
6 Air Temperature White
P15 8 Not Used
*5 amp Fuse Recommended

Page 3
M
Mode
Button
M
Mode
Button
M
Mode
Button
Down
Button
Up
Button
Speedometer / Depth Sounder
The Serial Bus Speedometer / Depth
Sounder provides both the functions of a
speedometer and a depth sounder. The
analog speedometer is a stepper motor
instrument which looks like a standard
analog device but which is actually a
digital instrument. On small pointer
movements you may occasionally see the
pointer moving in the one third degree
“steps” that represent the accuracy of the
instrument.
Speedometer Calibration
The analog speedometer displays the
speed of the boat through the water. The
speedometer is calibrated at the factory for
normal installations which use a pitot tube
sensor. As significant variation has been
found in various installations, the
speedometer can be easily calibrated to a
known reference such as a radar gun or
GPS. The LCD will display;
When the unit is operating in normal
mode (i.e. pitot status information on the
LCD), push and hold the “mode M” button
down for 2 seconds will cause the
speedometer to go to the calibration mode.
The LCD will show “AdJUST”.
Run the boat at a constant 30 MPH as
measured by the GPS or radar. Adjust the
speedometer pointer by pressing the “Up”
or “Down” buttons until the speedometer
matches the GPS or radar speed.
When finished, press the “mode M” button
to exit the adjustment screen. The operator
has the option of saving or canceling the
adjustment procedure. The options can be
selected using the “Up” or “Down”
buttons. To save the calibration setting,
press and hold the “mode M” button for 2
seconds when the display shows “SAVE”
To exit the adjustment procedure without
saving, press and hold the “mode M”
button for 2 seconds when the display
shows “NO SAVE”. Multiple runs in
opposite directions may be necessary to
compensate for errors due to water
currents.
Notes

Serial Bus
for CorrectCraft®
Pleasurecraft GM Engines
ISO151C ECR#4418 03/08/2004
IS0151
Visual /Audible Alert Messages
Easy Installation
Waterproof Connections
Easy to Read Digital Displays
Easy to use Depth Sounder
Multiple Interfaces
Copyright 2004 by the Thomas G. Faria Corporation, Uncasville, CT USA
No part of this publication may by reproduced in any form, in an electronic retrieval system or otherwise, without
the prior written permission of the company.
Faria® is the trademark of the Thomas G. Faria Corporation
M
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