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O P E R A T O R ’ S G U I D E






E N G I N E M O N I T O R I N G S Y S T E M

For Caterpillar Electronically Controlled Marine Engines3176 • 3196 • 3406E • 3408C • 3412C

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Engine Monitoring System (EMS) Operator’s Guidefor Caterpi l lar Electronical ly Control led Marine Engines

Introduction

The Caterpillar Engine Monitoring System (EMS) is designed to displayvarious engine and transmission parameters in both analog and digitalforms for Caterpillar electronically controlled marine engines. The displaytechnology provides excellent visibility in different light conditions. Thesystem also has the ability to display vessel speed when connected to aGPS Interface Module.

The Engine Monitoring System includes three individual gauge units whichcan be installed in various locations to enhance operator and vessel

operation. One main unit is required for each desired operator station. Thetachometer and quad-gauge units are optional and will operate only bybeing connected to a main unit. Each unit is contained within a separatesealed box.

Power-Up Test Function

EMS undergoes an automatic self-test every time the EMS is powered up.While executing this internal test, the display provides a visual indication

by ramping gauges and displaying all digits to ensure the panel is workingcorrectly.

Reference

Refer to SENR1191 — Marine Engine Electronic Display Installation Guide

for complete installation procedures for the EMS units and switches.

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25

20

15

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5

0

x100

MPH

RPM SERV CODE

X10

kPo

km/h

RPMPM#1 RPMPM

#22

Quad-Gauge Unit Tachometer Unit Main Unit

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Communication Data Link

EMS provides two pins that are connected to the Cat data link. The datalink is available to share data with other modules on the link. Theelectronic control system will process engine and transmission parameterssuch as pressures, temperatures, percent load, engine speed, anddiagnostic information. These engine parameters will then be transmittedto EMS through Cat data link. The main EMS unit will receive thisinformation and display the information on various gauges. Only two

wires from the ECM to EMS are required to transmit all parameters.

Power Supply

Supply range: 18 to 32 Volts DC, 24 Volts DC nominal

Environmental Specifications

1. Operating temperature range: -40° to +85° C (-40° to +185° F)2. Storage temperature range: -55° to +85° C (-67° to +185° F)

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EMS Main Unit

Diagnostic Display

The main unit has ten warning lamps available for system related

diagnostics. These diagnostics can be used for system troubleshooting and

diagnostic information. They are located on the main EMS unit in two rowsof five:

Primary Speed Sensor Fault High Engine Coolant

Temperature or Sensor Fault

Backup Speed Sensor Fault High Transmission Oil

Pressure or Sensor Fault

Throttle Position Sensor Fault High Transmission Oil

Temperature or Sensor Fault

Electronic Fuel System Fault Low Engine Boost Pressure

or Sensor Fault

Low Engine Oil Pressure Low Engine Coolant Levelor Sensor Fault or Sensor Fault

RPM SERV CODE

X10

kPo

RPMPM#1

RPMPM#22

Transmission Oil

Pressure

Transmission Oil

Temperature

Engine Boost

Pressure

Engine Coolant

Level

Engine Oil

PressureEngine Coolant

Temperature

Actuator

(EUI)Throttle

Primary & Backup

Speed Sensors

LCD DigitalDisplay

RPM

#1

RPM

#2

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EMS Main Unit, cont.

LCD Digital DisplayBeneath the warning lamps is an LCD digital display for engine parameters.

Display Scroll Feature Each time the scroll forward switch is depressed and held, EMS will pagethrough the engine and transmission parameters in the same order listedbelow. When the scroll backward switch is depressed and held, EMS willpage through the engine and transmission parameters in the reverse order.

The abbreviation for the parameter will be displayed. When the scrollswitch is released, EMS will display the current “real time” value for thatparameter.

Abbreviation Parameter

Spd Engine Speed

GA-1 Engine Coolant Temperature

GA-2 Engine Oil Pressure

GA-3 Transmission Oil Pressure

GA-4 Transmission Oil Temperature

Fuel Fuel Rate

Hrs Engine Hours

Load Engine (Percent) Load

Loc Engine Location (Port, Center, or Starboard)

U.S./Metric Units Either U.S. or metric (SI) units will be displayed depending on the positionof the U.S./metric switch.

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Quad-Gauge Unit

Engine Oil PressureThe upper left gauge is used to display engine oil pressure 0 kPa to600 kPa (87 psi). When the oil pressure reaches below 70 kPa (10 psi)the engine oil pressure gauge needle will enter the red zone and thealarm will activate.

Engine Coolant TemperatureThe upper right gauge is used to display engine coolant temperature

from 0° to 120° C (248° F). When coolant temperature reaches above102° C (214° F) the gauge needle will enter the red zone and the alarmwill activate.

Transmission Oil PressureThe lower left gauge is used to display transmission oil pressure from200 to 3000 kPa (29 to 435 psi). When the transmission oil pressurereaches above 2756 kPa (400 psi), the needle of the gauge will enter thered zone and the alarm will activate.

Transmission Oil TemperatureThe lower right gauge is used to display transmission oil temperaturefrom 0° to 120° C (248° F). When the transmission oil temperaturereaches above 99° C (210° F), the needle of the gauge will enter the redzone and the alarm will activate.

NOTE: The gauge needles may not return to the 0 position when thepower is cycled off.

Engine Coolant

Temperature

Engine Oil

Pressure

Transmission Oil

Pressure

Transmission Oil

Temperature

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Tachometer Unit

Tachometer GaugeThe tachometer gauge displays engine speed from 0 to 3000 rpm in analogform.

LCD Digital Display

Vessel Speed The left side of the window displays vessel speed in miles per hour or

kilometers per hour with a three-digit LCD indicator. Depending on theposition of the U.S./metric switch, mph or km/h will be diplayed. Thedefault setting is km/h. This feature is only displayed if the GPS interfacemodule is installed.

Trolling Mode Indicator The right side of the window has a two-digit LCD indicator. The left digit isfor trolling mode status. The “*” symbol will turn on during trolling modeoperation.

Engine Synchronization Indicator The right side of the window has a two-digit LCD indicator. The right digit

is for engine synchronization status. The “<” or “>” symbols are used to

indicate engine synchronization status. When the “>” is on, the engines

are synchronized to the STARBOARD engine throttle. The “<” indicates the

engines are synchronized to the PORT engine throttle.

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km/h

Vessel

SpeedTrolling

Status

Synchronization

Status

Engine

Speed

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