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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:

Low fuel

Low oil pressure

High engine temperature

Low voltage 

Engine RPM reduction due to engine  

 

controller command

RPM limit

Knock sensing system malfunction

Ignition system malfunction

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

Summary of Contents for Serial Bus

Page 1: ...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 ...

Page 2: ...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 ...

Page 3: ...ngine 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 car...

Page 4: ...n 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 b...

Page 5: ...o 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 l...

Page 6: ...ings 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 a...

Page 7: ...l 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 fathom...

Page 8: ...e AirTemperature optional optional Page 14 Faria Serial Bus Gateway Typical Power Connections Typical Instrument Connections P15 P13 P14 P12 P11 P7 P8 P10 P6 P5 P4 P1 P3 P15 P13 P14 P12 P11 P7 P8 P10 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 P O S N E G Battery P2 1 2 4 3 Black Black Purple Red To Air...

Page 9: ...y 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 a...

Page 10: ...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 decre...

Page 11: ...e displayed again The operator can cancel as often as desired Down Button Up Button Figure 2 M M M M TachometerDisplaySequence Quick Press Quick Press Quick Press Quick Press Hourmeter HoursRemaining M Quick Press EngineTemperature OilPressure Voltmeter Severe Conditions Includes a Flashing Red Light Warnings Low Battery Voltage Flashing Red Light High Engine Temperature Flashing Red Light Low Oil...

Page 12: ...e displayed again The operator can cancel as often as desired Down Button Up Button Figure 2 M M M M TachometerDisplaySequence Quick Press Quick Press Quick Press Quick Press Hourmeter HoursRemaining M Quick Press EngineTemperature OilPressure Voltmeter Severe Conditions Includes a Flashing Red Light Warnings Low Battery Voltage Flashing Red Light High Engine Temperature Flashing Red Light Low Oil...

Page 13: ...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 decre...

Page 14: ...y 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 a...

Page 15: ...e AirTemperature optional optional Page 14 Faria Serial Bus Gateway Typical Power Connections Typical Instrument Connections P15 P13 P14 P12 P11 P7 P8 P10 P6 P5 P4 P1 P3 P15 P13 P14 P12 P11 P7 P8 P10 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 P O S N E G Battery P2 1 2 4 3 Black Black Purple Red To Air...

Page 16: ...l 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 fathom...

Page 17: ...ings 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 a...

Page 18: ...o 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 l...

Page 19: ...n 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 b...

Page 20: ...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 ...

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