Freightliner CORONADO, CENTURY CLASS Service Manual

CENTURY CLASS S/T

& CORONADO

STI-411-2

A24-01036-000

Driver’s Manual

Foreword

Introduction

This manual provides information needed to operate and understand the vehicle and its components. More detailed information is contained in the

Warranty Information for North America

in the vehicle’s workshop and maintenance manuals. Custom-built Freightliner vehicles are equipped with

various chassis and cab components. Not all of the information contained in this manual applies to every vehicle. For details about components in your vehicle, refer to the chassis speciﬁcation pages included in all new vehicles and to the vehicle speciﬁcation decal, located inside the vehicle.

For your reference, keep this manual in the vehicle at all times.

IMPORTANT: Descriptions and speciﬁcations in this manual were in effect at the time of printing. Freightliner Trucks reserves the right to discontinue models and to change speciﬁcations or design at any time without notice and without incurring obligation. Descriptions and speciﬁcations contained in this publication provide no warranty, expressed or implied, and are subject to revisions and editions without notice.

Owner’s

booklet, and

Environmental Concerns and Recommendations

Whenever you see instructions in this manual to discard materials, you should ﬁrst attempt to reclaim and recycle them. To preserve our environment, follow appropriate environmental rules and regulations when disposing of materials.

Event Data Recorder

This vehicle is equipped with one or more devices that record speciﬁc vehicle data. The type and amount of data recorded varies depending on how the vehicle is equipped (such as the brand of engine, if an air bag is installed, or if the vehicle features a collision avoidance system, etc.).

dination, or Fleetpack assistance. Our people are knowledgeable, professional, and committed to following through to help you keep your truck moving.

Reporting Safety Defects

If you believe that your vehicle has a defect which could cause a crash or could cause injury or death, you should immediately inform the National Highway Traffic Safety Administration (NHTSA) in addition to notifying Daimler Trucks North America LLC.

If the NHTSA receives similar complaints, it may open an investigation, and if it ﬁnds that a safety defect exists in a group of vehicles, it may order a recall and remedy campaign. However, NHTSA cannot become involved in individual problems between you, your dealer, or Daimler Trucks North America LLC.

To contact NHTSA, you may call the Vehicle Safety Hotline toll-free at 1-888-327-4236 (TTY: 1-800-424-9153); go to www.safercar.gov;or write to: Administrator, NHTSA, 1200 New Jersey Avenue, SE, Washington, DC 20590. You can also obtain other information about motor vehicle safety from www.safercar.gov.

Canadian customers who wish to report a safetyrelated defect to Transport Canada, Defect Investigations and Recalls, may telephone the toll-free hotline 1-800-333-0510, or contact Transport Canada by mail at: Transport Canada, ASFAD, Place de Ville Tower C, 330 Sparks Street, Ontario, Canada K1A 0N5.

For additional road safety information, please visit the Road Safety website at: www.tc.gc.ca/

roadsafety.

Customer Assistance Center

Having trouble ﬁnding service? Call the Customer Assistance Center at 1-800-385-4357 or 1-800-FTLHELP. Call night or day, weekdays or weekends, for dealer referral, vehicle information, breakdown coor-

STI-411-2 (12/12)

A24-01036-000

Printed in U.S.A.

Foreword

No part of this publication, in whole or part, may be translated, reproduced, stored in a retrieval system, or transmitted in any form by any means, electronic, mechanical, photocopying, recording, or otherwise, without the prior written permission of Daimler Trucks North America LLC. For additional information, please contact Daimler Trucks North America LLC, Service Systems and Documentation, P.O. Box 3849, Portland OR 97208–3849 U.S.A. or refer to

www.Daimler-TrucksNorthAmerica.com and www.FreightlinerTrucks.com.

Contents

Chapter Page

Introduction, Environmental Concerns and Recommendations, Event Data Recorder, Customer Assistance Center, Reporting

Safety Defects ..................................................... Foreword

1 Vehicle Identiﬁcation ...................................................... 1.1

2 Instruments and Controls Identiﬁcation ....................................... 2.1

3 Vehicle Access .......................................................... 3.1

4 Heater and Air Conditioner ................................................. 4.1

5 Seats and Seat Belts ..................................................... 5.1

6 Steering and Brake Systems ............................................... 6.1

7 Engines and Clutches .................................................... 7.1

8 Transmissions ........................................................... 8.1

9 Rear Axles ............................................................. 9.1

10 Fifth Wheels and Trailer Couplings ......................................... 10.1

11 Pretrip and Post-Trip Inspections and Maintenance ............................ 11.1

12 Cab Appearance ........................................................ 12.1

13 In an Emergency ....................................................... 13.1

Index .................................................................. I.1

Vehicle Identiﬁcation

Vehicle Speciﬁcation Decal ......................................................... 1.1

Federal Motor Vehicle Safety Standard (FMVSS) Labels .................................. 1.1

Canadian Motor Vehicle Safety Standard (CMVSS) Labels ................................ 1.1

Tire and Rim Labels ............................................................... 1.2

EPA Emission Control .............................................................. 1.2

Vehicle Identiﬁcation

Vehicle Speciﬁcation Decal

The vehicle speciﬁcation decal lists the vehicle model, identiﬁcation number, and major component models. It also recaps the major assemblies and installations shown on the chassis speciﬁcation sheet. One copy of the speciﬁcation decal is attached to the driver’s side sunvisor; another copy is inside the rear cover of the

America

in Fig. 1.1.

MANUFACTURED BY MODEL

VEHICLE ID NO. DATE OF MFR

ENGINE MODEL TRANS MODEL MAIN FRONT AXLE MODEL REAR AXLE MODEL

PAINT MFR PAINT NO.

11/21/96

Fig. 1.1, Vehicle Speciﬁcation Decal, U.S.-Built Vehicle

NOTE: Labels shown in this chapter are examples only. Actual speciﬁcations may vary from vehicle to vehicle.

Owner’s Warranty Information for North

booklet. An illustration of the decal is shown

COMPONENT INFORMATION

USE VEHICLE ID NO. WHEN ORDERING PARTS

WHEELBASE ENGINE NO. TRANS NO. FRT AXLE NO. REAR AXLE NO. REAR AXLE NO.

IMRON PAINT−CAB CAB COLOR A: WHITE (4775) CAB COLOR B: BROWN (3295) CAB COLOR C: BROWN (29607) CAB COLOR D: DARK BROWN (7444)

Shown

RATIO FOR COMPLETE PAINT INFORMATION

SEE VEHICLE SPECIFICATION SHEET

PART NO. 24−00273−010

f080021

11/21/96

f080053

1. Date of Manufacture: by month and year

2. Gross Vehicle Weight Rating: developed by taking the sum of all the vehicle’s gross axle ratings

3. Gross Axle Weight Ratings: developed by considering each component in an axle system including suspension, axle, wheels, and tires - and using the lowest component capacity as the value for the system

Fig. 1.2, Certiﬁcation Label, U.S.

VEHICLE ID NO. DATE OF MFR GVWR

TIRES AND RIMS LISTED ARE NOT NECESSARILY THOSE INSTALLED ON THE VEHICLE.

10/31/95

FRONT AXLE FIRST INTERMEDIATE AXLE SECOND INTERMEDIATE AXLE THIRD INTERMEDIATE AXLE REAR AXLE

GAWR TIRES RIMS PSI COLD

f080054

1. Date of Manufacture: by month and year

2. Gross Vehicle Weight Rating: developed by taking the sum of all the vehicle’s gross axle ratings

Fig. 1.3, Tire and Rim Label

24−00273−040

Federal Motor Vehicle Safety Standard (FMVSS) Labels

NOTE: Due to the variety of FMVSS certiﬁcation requirements, not all of the labels shown will apply to your vehicle.

Tractors with or without ﬁfth wheels purchased in the U.S. are certiﬁed by means of a certiﬁcation label (Fig. 1.2) and the tire and rim labels (Fig. 1.3). These labels are attached to the left rear door post, as shown in Fig. 1.4.

If purchased for service in the U.S., trucks built without a cargo body have a certiﬁcation label (Fig. 1.5) attached to the left rear door post. See Fig. 1.4.In addition, after completion of the vehicle, a certiﬁcation label similar to that shown in Fig. 1.2 must be attached by the ﬁnal-stage manufacturer. This label will be located on the left rear door post and certiﬁes

1.1

that the vehicle conforms to all applicable FMVSS regulations in effect on the date of completion.

Canadian Motor Vehicle Safety Standard (CMVSS) Labels

In Canada, tractors with ﬁfth wheels are certiﬁed by means of a "Statement of Compliance" label and the Canadian National Safety Mark (Fig. 1.6), which are attached to the left rear door post. In addition, tire and rim labels (Fig. 1.3) are also attached to the left rear door post.

If purchased for service in Canada, trucks built without a cargo body and tractors built without a ﬁfth wheel are certiﬁed by a "Statement of Compliance" label, similar to Fig. 1.2. This label must be attached by the ﬁnal-stage manufacturer after completion of the vehicle. The label is located on the left rear door

Vehicle Identiﬁcation

Tire and Rim Labels

Tire and rim labels certify suitable tire and rim combinations that can be installed on the vehicle, for the

given gross axle weight rating. Tires and rims installed on the vehicle at the time of manufacture may have a higher load capacity than that certiﬁed by the tire and rim label. If the tires and rims currently on the vehicle have a lower load capacity than that shown on the tire and rim label, then the tires and rims determine the load limitations on each of the axles. See Fig. 1.3.

11/01/95

f601086

1. Tire and Rim Labels 2. Certiﬁcation Label

Fig. 1.4, Labels Location

09/28/98

f080023

Fig. 1.5, Incomplete Vehicle Certiﬁcation Label, U.S.

EPA Emission Control

Vehicle Noise Emission Control Label

A vehicle noise emission control label (Fig. 1.7)is attached either to the left side of the dashboard or to the top-right surface of the frontwall between the dash and the windshield.

FREIGHTLINER CORPORATION THIS VEHICLE CONFORMS TO U.S. EPA REGULATIONS FOR NOISE EMISSION APPLICABLE TO MEDIUM AND HEAVY TRUCKS. THE FOLLOWING ACTS OR THE CAUSING THEREOF BY ANY PERSON ARE PROHIBITED BY THE NOISE CONTROL ACT OF 1972: A. THE REMOVAL OR RENDERING INOPERATIVE, OTHER THAN FOR PURPOSES OF MAINTENANCE, REPAIR, OR REPLACEMENT, OF ANY NOISE CONTROL DEVICE OR ELEMENT OF DESIGN (LISTED IN THE OWNER’S MANUAL) INCORPORATED INTO THIS VEHICLE IN COMPLIANCE WITH THE NOISE CONTROL ACT. B. THE USE THIS VEHICLE AFTER SUCH DEVICE OR ELEMENT OF DESIGN HAS BEEN REMOVED OR RENDERED INOPERATIVE.

10/06/98

VEHICLE NOISE EMISSION CONTROL INFORMATION

DATE OF MANUFACTURE

Fig. 1.7, Vehicle Noise Emission Control Label

IMPORTANT: Certain Freightliner incomplete vehicles may be produced with incomplete noise control hardware. Such vehicles will not have a vehicle noise emission control information label. For such vehicles, it is the ﬁnal-stage manufacturer’s responsibility to complete the vehicle in conformity to U.S. EPA regulations (40 CFR Part

205) and label it for compliance.

01/96

24−00273−020

f080026

10/10/2006

Fig. 1.6, Canadian National Safety Mark

post, and certiﬁes that the vehicle conforms to all applicable CMVSS regulations in effect on the date of completion.

f080024

EPA07 Exhaust Emissions Regulations

To meet January 2007 emissions regulations, engines manufactured after January 1, 2007, are equipped with an emission aftertreatment device. There is a warning label on the driver’s sunvisor, explaining important new warning indicators in the driver’s message display, that pertain to the aftertreatment system. See Fig. 1.8.

1.2

Vehicle Identiﬁcation

EXHAUST AFTERTREATMENT SYSTEM INFORMATION

INDICATOR LAMP(S)

Indicator Lamp Message(s)

Diesel Particulate Filter Condition

Required Action

For a driver performed Parked Regeneration, vehicle must be equipped with a dash mounted Regeneration Switch.

(Solid)

Level 1 Level 3Level 2 Level 4

Filter Regeneration Recommended

Filter is reaching capacity

. .

Bring vehicle to highway speeds to allow for an Automatic Regeneration or perform a Parked Regeneration.

(Flashing) (Flashing)

Filter Regeneration Necessary

Filter is now reaching maximum capacity

Switch.

To avoid engine derate bring vehicle to highway speeds to allow for an Automatic Regeneration or perform a Parked Regeneration as soon as possible.

CHECK CHECK

Parked Regeneration Required − Engine Derate

Filter has reached maximum capacity

Vehicle must be parked and a Parked Regeneration must be performed − engine will begin derate.

(Flashing)

Parked Regeneration Required − Engine Shut Down

Filter has exceeded maximum capacity

Vehicle must be parked and a Parked Regeneration or Service Regeneration must be performed. Check engine operator’s manual for details −engine will shut down.

STOP

ARNING

HEST (High Exhaust System Temperature)

Flashing

A regeneration is in progress.

Solid

Exhaust Components and exhaust gas are at high temperature. When stationary, keep away from people and flammable materials or vapors.

See Engine Operator’s Manual for complete Regeneration Instructions.

06/29/2009

Fig. 1.8, Sunvisor Warning Label

It is a violation of federal law to alter exhaust plumbing or aftertreatment in any way that would bring the engine out of compliance with certiﬁcation requirements. (Ref: 42 U.S.C. S7522(a) (3).) It is the owner’s responsibility to maintain the vehicle so that it conforms to EPA regulations.

24−01583−000B

f080147

1.3

Instruments and Controls

Identiﬁcation

Instrumentation Control Units ........................................................ 2.1

Warning and Indicator Lights ........................................................ 2.2

Driver Message Center ............................................................ 2.5

Instruments ..................................................................... 2.14

Controls ........................................................................ 2.18

Roll Stability Advisor and Control System ............................................. 2.26

Voltage and Fuel Efficiency Controls ................................................. 2.28

Meritor WABCO

VORAD VS-400 System ........................................................... 2.32

Lane Departure Warning Controls ................................................... 2.38

Antilock Braking System ............................................ 2.30

Instruments and Controls Identiﬁcation

Instrumentation Control Units

The instrumentation control unit (ICU) provides the driver with engine and vehicle information. It is comprised of standard and optional gauges, an audible warning, a driver message center, and a lightbar containing warning and indicator lamps (also known as telltales). Warning and indicator lamps illuminate in red (danger), amber (caution), green (status advisory), or blue (high-beam headlights activated).

Century Class vehicles are equipped with either an ICU4M (Fig. 2.1) or ICU2M (Fig. 2.2).

The following headings in this chapter provide additional information and operating instructions for ICU components:

•

"Warning and Indicator Lights"

•

"Driver Message Center"

•

"Instruments"

PSI

100

OIL

200

100

300

OIL

PSI

TURBO

200

150

100

250

WATER

VOLTS

F 10

150

PYRO

STOPCHECK

RPM

X 100

Ignition Sequence

When the ignition is turned on, the ICU runs a selfcheck. Observing the ignition sequence is a good way to ensure the ICU is functioning properly.

IMPORTANT: Do not crank the engine until the ICU gauge sweep is complete.

NOTE: Air gauges do not complete a sweep of their dials during the ignition sequence.

When the ignition is turned on, the following actions should occur:

•

electronic gauges complete a full sweep of their dials

•

some warning and indicator lamps illuminate, then are extinguished

FASTEN SEATBELTS

0000432 MILES

30 10

MPH

OPT OPT OPT OPTOPT OPT OPT OPT

BRAKE

OPT

ABS

IDLE

PSI

0 160

AIR

10060

PSI

0 160

11 12

110

130

km/h

1/2

FUEL

200

F 100

300

AXLE

190

110

F 100

TRANS

200

AXLE

10060

AIR

270

350

300

09/29/2010 f610706b

1. Engine Oil Pressure Gauge

2. Engine Coolant Temperature Gauge

3. Engine Oil Temperature Gauge

4. Battery Voltage Gauge

5. Turbo Boost Air Pressure Gauge

6. Pyrometer

7. Dash Message Center

8. Warning and Indicator Lights

2.1

9. Tachometer

10. Speedometer

11. Primary Air Pressure Gauge

12. Secondary Air Pressure Gauge

13. Fuel Level Gauge

14. Transmission Fluid Temperature Gauge

15. Forward Drive Axle Temperature Gauge

16. Rearmost Drive Axle Temperature Gauge

Fig. 2.1, ICU4M Instrument Cluster

Instruments and Controls Identiﬁcation

09/27/95

1. Main Dash Panel

2. Lightbar

3. Driver Message Center

4. Warning and Indicator Lights

Fig. 2.2, ICU2M Instrument Cluster

•

audible alert sounds until sufficient air pressure builds up in the primary and secondary air systems

•

software revision level of the ICU is displayed on the driver message center, followed by any active faults

f600991

IMPORTANT: If any red or amber warning or indicator lamps do not illuminate during the ICU self-check or do not extinguish after the selfcheck completes, take the action outlined in

Table 2.1, or take the vehicle to an authorized

Daimler Trucks service facility as soon as possible.

Audible Alerts

An audible alert sounds during the ignition sequence and whenever one of the following conditions exists:

•

Engine oil pressure falls below the minimum preset value.

•

Coolant temperature rises above the maximum preset value.

•

Air pressure falls below approximately 70 psi (483 kPa).

•

Parking brake is set with the vehicle moving faster than two miles per hour.

•

System voltage falls below 12 volts.

•

Door is open or the headlights are on, with the parking brake off.

Warning and Indicator Lights

The ICU lightbar has three or four rows of warning and indicator lights with icon symbols, depending on the ICU. The positions of the lights may vary for the different ICU’s, but the telltales are standard for all applications. See Table 2.1 for a listing of standard and commonly used warning and indicator lamps.

Warning and indicator lamps illuminate in red (danger), amber (caution), green (status advisory), or blue (high-beam headlights active).

IMPORTANT: Depending upon local jurisdictional emissions guidelines, vehicles may not be equipped with all of the lamps shown in

Table 2.1.

NOTE: If active faults are present, take the vehicle to an authorized Daimler Trucks service facility as soon as possible.

If the ICU receives active fault codes, it displays them one after the other until the parking brake is released or the ignition is turned off. Once the parking brake is completely released, the ICU displays the odometer. If there are no active faults, the ICU displays the odometer after the self-check completes.

When the self-check is complete on an ICU4M, the fasten seat belt screen displays if the engine is off. If the engine is running, the idle hours screen displays.

Engine Protection System

WARNING

When the red STOP engine lamp illuminates, most engines are programmed to shut down automatically within 30 seconds. The driver must immediately move the vehicle to a safe location at the side of the road to prevent causing a hazardous situation that could cause bodily injury, property damage, or severe damage to the engine.

See Fig. 2.3 for an explanation of the aftertreatment system (ATS) warning indicators, and actions required to avoid further engine protection steps.

2.2

Instruments and Controls Identiﬁcation

Common Warning and Indicator Lamps

Lamp Description Color

Indicates a serious fault that requires engine shutdown immediately. The engine protection system reduces the maximum engine torque and speed, and, if the condition does not improve, shuts down the engine within 30 to 60 seconds.

STOP

STOP Engine

Safely bring the vehicle to a stop on the side of the road and shut down the engine as soon as the red light is seen.

IMPORTANT: If the engine shuts down while the vehicle is in a hazardous location, turn the key to the OFF position for a few seconds, then restart the engine and move the vehicle to a safer location.

BRAKE

CHECK

Low Air Pressure

Indicates air pressure in the primary or secondary reservoir is below 70 psi (483 kPa).

Indicates the parking brake is engaged. An audible alert

Parking Brake

activates when the vehicle is moving over 2 mph (3 km/h) with the parking brake set.

Low Battery Voltage Indicates that battery voltage is 11.9 volts or less.

Activates with an audible alert when the system detects that the parking brake is off and the driver seat belt is not

Unfastened Seat Belt

fastened on some vehicles. On other vehicles, this lamp illuminates for 15 seconds when the ignition is ﬁrst turned on.

Indicates an engine condition (low oil pressure, low coolant level, high coolant temperature, high DPF soot level, or

CHECK Engine

uncontrolled DPF regeneration) that requires correction. Correct the condition as soon as possible. If the condition worsens, the STOP engine lamp illuminates.

Slow (10-second) ﬂashing indicates a regeneration (regen) is in progress.

High Exhaust System Temperature (HEST)

IMPORTANT: When the HEST lamp is illuminated, do

not park the vehicle near ﬂammable material.

Solid illumination indicates high exhaust temperatures at the outlet of the tail pipe when speed is below 5 mph (8 km/h).

Solid illumination indicates a regen is required. Change to a more challenging duty cycle (such as highway driving) to

Diesel Particulate Filter (DPF) Status

raise exhaust temperatures for at least twenty minutes, or perform a parked regen.

Blinking indicates that a parked regen is required immediately.An engine derate and shutdown occurs.

Red

Amber

Malfunction Indicator Lamp (MIL)

2.3

Indicates an emissions-related fault. See the engine operation manual for details.

Vehicle ABS

Trailer ABS

Instruments and Controls Identiﬁcation

Common Warning and Indicator Lamps

Lamp Description Color

Momentary illumination indicates the vehicle ABS is engaged.

Solid illumination indicates a problem with the vehicle ABS. Repair the ABS immediately to ensure full braking capability.

Momentary illumination indicates the trailer ABS is engaged. Solid illumination indicates a problem with the trailer ABS.

Repair the ABS immediately to ensure full braking capability.

CHARGE

WHEEL

SPIN

No Charge

Water in Fuel

Indicates the alternator is not properly powering the electrical system.

Indicates the fuel may contain water. Drain any water collected in the fuel/water separators.

Fuel Filter Restriction Indicates the fuel ﬁlter is clogged and requires service.

Check Transmission Indicates an undesirable transmission condition.

Transmission Overheat Indicates high transmission temperature.

Flashing indicates the ATC system is active, or the ATC button has been pressed to allow wheel slip.

Wheel Spin

Solid illumination indicates a problem with the ATC system. Repair the ATC system immediately to ensure full braking capability.

Engine Brake Indicates the engine brake is enabled.

Left-Turn Signal

Flashing indicates the outside left-turn signal lights are activated.

Amber

Green

Right-Turn Signal

High-Beam Headlights Indicates the high-beam headlights are on. Blue

See Fig. 2.3 for an explanation of the aftertreatment system (ATS) warning indicators, and actions required to avoid further engine protection steps.

Flashing indicates the outside right-turn signal lights are activated.

Table 2.1, Common Warning and Indicator Lamps

2.4

Instruments and Controls Identiﬁcation

EXHAUST AFTERTREATMENT SYSTEM INFORMATION

INDICATOR

02/20/2009

LAMP(S)

Indicator Lamp Message(s)

Diesel Particulate Filter Condition

Required Action

For a driver performed Parked Regeneration, vehicle must be equipped with a dash mounted Regeneration Switch.

(Solid)

Level 1 Level 3Level 2 Level 4

Filter Regeneration Recommended.

Filter is reaching capacity

Bring vehicle to highway speeds to allow for an

Automatic Regeneration or perform a Parked Regeneration.

(Flashing) (Flashing)

Filter Regeneration Necessary

Filter is now reaching maximum capacity

Switch.

To avoid engine derate, bring vehicle to highway speeds to allow for an Automatic Regeneration, or perform a Parked Regeneration as soon as possible.

Fig. 2.3, ATS Warning Lamps

The STOP engine lamp illuminates when the engine protection system is activated in one of two ways. On some engines, the engine protection system derates the engine, allowing it to run at lower rpm and slower vehicle speed. Drive the vehicle to a safe location or to a service facility.

IMPORTANT: Safely bring the vehicle to a stop on the side of the road and shut down the engine as soon as the red light is seen. If the engine shuts down while the vehicle is in a hazardous location, turn the key to the OFF position for a few seconds, then restart the engine and move the vehicle to a safer location.

On other engines, the engine protection system shuts down the engine. It ﬁrst derates the engine, then shuts it down completely 30 to 60 seconds after the indicator illuminates (depending on the critical fault type) if the condition does not improve. Bring the vehicle to a stop on the side of the road before the engine shuts down.

Some vehicles may have a shutdown-override switch, which may be used to momentarily override the shutdown sequence. See Chapter 7 for detailed information regarding the shutdown process.

CHECK

Parked Regeneration Required − Engine Derate

Filter has reached maximum capacity

Vehicle must be parked, and a Parked Regeneration must be performed. Engine will begin derate.

STOP

Service Regeneration Required. Engine Derate To Idle Only.

Filter has exceeded maximum capacity.

Vehicle must be parked, and a Service Regeneration must be performed. Check engine operator’s manual for details. Engine will shut down.

ARNING

HEST (High Exhaust System Temperature)

Flashing

A regeneration is in

progress.

Solid

Exhaust components and exhaust gas are at high temperature. When stationary, keep away from people and flammable materials or vapors.

IMPORTANT: Do not attempt to restart the engine while the vehicle is moving. Bring the vehicle to a safe stop, then restart the engine.

To restart the engine, turn the ignition switch to OFF for a few seconds, then turn the ignition switch to ON and let the gauge sweep complete before starting the engine. The engine will run for a short period and shut down again if the condition does not improve.

Driver Message Center

The dash message centers for the following instrument clusters are described below:

•

ICU4M

•

ICU2M

A keypad located on the auxiliary dash panel controls the driver message center. See Fig. 2.4.

ICU4M

Functions

Main features of the ICU4M include:

•

Gauges that sweep 270 degrees and have pointers lit by an LED.

f080156

2.5

Instruments and Controls Identiﬁcation

Dedicated Keys

08/08/96

To reset a value, press the SET/RESET button twice.

Fig. 2.4, ICU4M Keypad

•

Service intervals that are programmable via the keypad.

•

An audible warning and alert message to warn the driver if the door is opened without ﬁrst setting the parking brake.

•

A ﬂashing alert message that appears on the driver message center in low engine oil pressure or high coolant temperature conditions.

With the parking brake off, only the odometer and alert screens will display. Park the vehicle and set the parking brake to access additional screens.

The dash message center displays alert screens when certain conditions occur. They are warnings, cautions, or other messages that require the driver’s attention, but not all of them are critical to the operation of the vehicle. Warning messages always display at full brightness.

More important messages take priority over less important messages. The order of priority is:

parking brake set (with the vehicle moving)

parking brake off (with the door open)

low oil pressure or high coolant temperature

hard brake warnings (if equipped with roll stability advisor)

low battery voltage

turn signal on

service warnings

no datalink activity

General Keys

Alert Screens

NOTE: If there is more than one alert message to display, tap any key to access the next message, and so on, until all the messages have been viewed.

Control Keys

f601009

Parking Brake On

This warning message and an audible warning come on whenever the parking brake is applied and the vehicle is moving faster than 2 mph (3 km/h). The screen and audible warning go away only when the parking brake is released, or speed is reduced below 2 mph.

Low Oil Pressure

This warning message and an audible warning come on whenever the oil pressure falls below the minimum oil pressure, whether the vehicle is idling or in motion. Tap any key to dismiss the message.

If the fault is still active 30 seconds after the message is dismissed, the warning message will come on again.

High Coolant Temp

This message and an audible warning come on whenever the engine coolant temperature exceeds the maximum allowable temperature.

If the fault is still active 30 seconds after the message is dismissed, the warning message will come on again.

Low Voltage

On some vehicles, this optional message and an audible warning come on whenever the ICU detects a low voltage condition.

Turn Signal On

This warning message and audible warning come on whenever the turn signal remains on for four minutes or ﬁve miles of travel.

To dismiss this message, either turn off the turn signal or tap any key.

Service Warnings

Service warning screens display during the ignition sequence and indicate that a service interval has been reached or exceeded and maintenance is required. The messages may indicate the number of miles (KM) or hours until the next required service or, once passed, the number of miles (KM) or hours ago that maintenance should have been performed.

2.6

Instruments and Controls Identiﬁcation

Automated Transmission Display

The ICU4M can display current gear information for vehicles with an automated transmission. The last three digits at the far right on the lower line of the driver display screen are reserved for this information.

If there is a request to shift, an up or down arrow is also displayed, depending on the shift direction.

On vehicles with conventional manual or automatic transmissions, the gear and shift direction are not displayed. For more information about speciﬁc models of automated transmissions, see Chapter 8.

Mobile Screens

The following screens are available when the parking brake is off (when the vehicle is mobile).

Fasten seat belt (rpm<100)

ii.

Fuel economy (rpm>100)

iii.

Odometer

iv.

Trip distance/hours

Trip advisory

vi.

Leg distance/hours

vii.

Leg advisory

viii.

Outside air temperature

ix.

Fuel used/average MPG (KM/L)

Stationary Screens

NOTE: Metric unit screens are similar. AMT= Current gear information for automated manual transmissions.

The following screens are available when the parking brake is on (when the vehicle is stationary).

Odometer

ii.

Trip information including trip miles/hours, idle hours, average speed, leg miles/hours

iii.

Fuel information including fuel used, fuel economy, idle/PTO fuel usage

iv.

Engine information including engine miles/hours, engine/PTO gallons, oil level

Diagnostic information

vi.

Service information including mileage or time to next service

vii.

Setup information

viii.

Vehicle information including Datalink status, ICU serial number, software version

ix.

Fasten seat belt warning

Trip Information

When idle hours are displayed, tap the any key to access the main trip information screen. See

Fig. 2.5. Tap the arrow keys on the 10-key keypad to

FASTEN SEATBELTS

123456.7 MILES AMT

Engine Idling

(100 RPM or more)

IDLE HOURS 1234:56

12.3GAL123456.7MI AMT

TRIP INFORMATION AMT

12/01/2004 f040699

2.7

Go to Fuel Information Screens

Press Right Arrow Key and Set the Parking Brake

Fig. 2.5, ICU4M Trip Information Screens

TRIP MILES 123456.7 TRIP HR 1234:56 AMT

IDLE HOURS 1234:56 AVG MPH 12.3 AMT

R R R

LEG MILES 123456.7 LEG HR 1234:56 AMT

Instruments and Controls Identiﬁcation

advance through the screens. Press and hold the SET/RESET key to reset any of the screens.

Fuel Information

Fuel information allows you to view total fuel usage since the last reset, fuel mileage, and fuel consumed while idling or running the PTO. See Fig. 2.6.Tap the arrow keys on the 10-key keypad to advance through the screens. Press and hold the SET/RESET key to reset any of the screens.

12/17/2004

Return to

Idle Hours

Screen

Go to Engine Information Screens

From Trip

Information

FUEL INFORMATION AMT

Engine Information

The engine information screens allow you to view engine mileage and hours, and total fuel consumption. See Fig. 2.7. Tap the arrow keys on the 10-key keypad to advance through the screens. Press and hold the SET/RESET key to reset any of the screens.

FUEL USED 12345.6 AVG MPG 12.34 AMT

IDLE GALLONS PTO GAL 12345.6 AMT

R R

12.3

f040700

12/01/2004

Return to

Idle Hours

Screen

Go to Diagnostic Information Screens

From Fuel

Information

ENGINE INFORMATION AMT

Fig. 2.6, ICU4M Fuel Information Screens

ENG MILES 123456.7 ENG HOUR1234:78AMT

ENG GALLONS 123456.7 PTO GAL 12345.6 AMT

If Oil Level Low

If Oil Level OK

If Oil Level High

Fig. 2.7, ICU4M Engine Information Screens

ENG OIL LEVEL

LO −1 QTS AMT

ENG OIL LEVEL

LO −1 QTS AMT

ENG OIL LEVEL

OK AMT

ENG OIL LEVEL

HI 1 QTS AMT

f040701

2.8

Instruments and Controls Identiﬁcation

Diagnostic Information

If active fault codes are displayed on the diagnostic information screens, make a note of the fault code and text message, then take the vehicle to an authorized Freightliner service facility as soon as possible. See Fig. 2.8 for a diagram of the diagnostic information screens.

Service Information

Service information allows you to view the next recurring service interval, expressed in either miles or hours. See Fig. 2.9. Service intervals can also be deactivated, so they do not display at all.

For programming service intervals, see Setup Infor- mation, below.

NOTE: If the vehicle has gone past the service interval, the miles (km)/hours remaining screen is replaced by the service was due screen, followed by the number of miles(km)/ hours since the service was due.

Setup Information

See Fig. 2.10 and Fig. 2.11 for diagrams of the setup information screens.

Setup information allows you to program various features of the ICU4M environment, including:

Service intervals (OFF/MILES/HOURS);

Target MPG;

LCD Lamp (ON/OFF);

Driver message center brightness;

Language (English/French/Spanish);

Units of measurement (English/Metric);

Driver select (ON/OFF)

Reset parameters to original settings.

Vehicle Information Screens

The vehicle information screens display hardware and software information, including the Freightliner part number and switch ID of the ICU. See Fig. 2.12.

ICU2M

A keypad located on the auxiliary dash panel controls the ICU2M. See Fig. 2.4. This 10-key keypad is used to:

12/17/2004

Return to

Idle Hours

Screen

Go to Service Information Screens

From Engine

Information

DIAGNOSTIC INFORMATION AMT

ACTIVE FAULTS 12 or NONE AMT

12 HIST DASH FAULTS LAST CLR 123456.7AMT

PUSH RESET TO

CLEAR DASH FAULTS AMT

ALL FAULTS

CLEARED AMT

MID(text) PID/SID(text) FMI(text) MID#sPID#FMI#AMT

LAST OCCUR 123456.7 1234 TIMES AMT

FIRST OCCUR 123456.7 1234 TIMES AMT

Fault # 1 Fault # n

Hist Fault # 1

Fig. 2.8, ICU4M Diagnostic Information Screens

MID(text) PID/SID(text) FMI(text) MID#sPID#FMI#AMT

LAST OCCUR 123456.7 1234 TIMES AMT

FIRST OCCUR 123456.7 1234 TIMES AMT

Hist Fault # n

f040702

2.9

Instruments and Controls Identiﬁcation

12/17/2004

Return to

Idle Hours

Screen

From Diagnostic

Information

SERVICE

INFORMATION AMT

SERVICE

INFORMATION AMT

Distance prior to reaching the

Distance traveled beyond the

set Service Interval

INTERVAL IS SET TO XXXXX MILES AMT

Go to Set−up Information Screens

12345 MILES

TO NEXT SERVICE AMT

Time prior to reaching the

Time accumulated beyond the

set Service Interval

INTERVAL IS SET TO XXXX HOURS AMT

Go to Setup Information Screens

1234 HOURS

TO NEXT SERVICE AMT

set Service Interval

SERVICE WAS DUE

12345 MILES AGO AMT

set Service Interval

SERVICE WAS DUE

1234 HOURS AGO AMT

NOTE: Service information screens only appear if the service interval is set to MILES or HOURS in Setup Information.

Fig. 2.9, ICU4M Service Information Screens

Return to

Idle Hours

Screen

From Service

Information

SETUP INFORMATION AMT

PUSH SET KEY TO CHANGE SERVICE AMT

SERVICE INTERVAL

OFF/

MILES

PUSH SET KEY TO

CHANGE SERVICE MI

/HOURS AMT

AMT

If Service Interval is set to MILES

INTERVAL

<−−LESS MORE−−> AMT

XXXXX

MILES

f040703

Go to Vehicle Information Screens

12/17/2004

Fig. 2.10, ICU4M Setup Information Screens (for service intervals)

•

call up information on mobile screens;

•

navigate from screen to screen;

•

set up the display;

•

record signiﬁcant data.

To more Setup Information

SERVICE INTERVAL

OFF/

MILES /

HOURS

AMT

If Service Interval is set to HOURS

PUSH SET KEY TO

CHANGE SERVICE HR

AMT

INTERVAL

<−−LESS MORE−−> AMT

XXXX

HOURS

The odometer is a seven-digit display with one decimal point after the sixth digit, allowing it to display tenths of miles (or kilometers). When ﬁrst installed, the odometer starts at 0.0 miles (or kilometers). When replaced, the odometer starts again from 0.0.

f040704

2.10

Instruments and Controls Identiﬁcation

Alert Screens

Alert screens can appear at any time, even when the vehicle is moving. They override the regular screen display. They are warnings, cautions, or other messages that require the driver’s attention, but not all of them are critical to the operation of the vehicle. The word Warning or Alert sometimes ﬂashes on the display screen above the alert text. More important messages take priority over less important messages.

Go to Setup Information Screens

PUSH SET KEY TO

CHANGE TARGET MPG AMT

PUSH SET KEY TO

CHANGE LCD LAMP AMT

PUSH SET KEY TO

CHANGE BRIGHTNESS AMT

PUSH SET KEY TO

CHANGE LANGUAGE AMT

PUSH SET KEY TO

CHANGE UNITS AMT

TARGET MPG:

<−−LESS MORE−−>AMT

LCD LAMP

<−−OFF

DISPLAY BRIGHTNESS

<−−DARK LIGHT−−>AMT

LANGUAGE:

FRENCH/SPANISH AMT

UNITS

ENGLISH

12.3

−−> AMT

ENGLISH

/ METRIC AMT

NOTE: If there is more than one alert message to display, press any button to scroll to the next message, and so on until all the messages have been viewed.

Parking Brake On

Low Oil Pressure

NOTE: All alert screens follow Low Oil Pressure alert format.

This warning message and an audible warning come on whenever the oil pressure falls below the minimum oil pressure, whether the vehicle is idling or in motion. See Fig. 2.13. To dismiss the message, press any button on the keypad.

If low oil pressure is detected during the ignition sequence, it displays as an active fault and the alert screen does not appear. After 30 seconds, this message displays again.

PUSH SET KEY TO

CHANGE PARAMETERS AMT

12/17/2004

Go to Vehicle Information Screens

Fig. 2.11, Other Setup Information

Return to

Idle Hours

Screen

VEHICLE INFORMATION AMT

Return to Trip Information Screens

01/11/2005

From Setup

Information

RESET PARAMETERS

<−− NO−−> AMT

YES

Low Coolant Level

This warning message and audible warning activate whenever the coolant level falls below a preset point.

f040705

DATALINK ACTIVE

AMT

Fig. 2.12, ICU4M Vehicle Information Screens

DATA LINK STATUS USAGE 12% ERR1%AMT

DASH# XXX−XXXXX−XXX SW# P1.2.3 AMT

f040706

2.11

INITIAL

WARNING

PRESS ANY KEY

NORMAL OPERATION

SCREEN

WARNING

LOW OIL PRESSURE

Instruments and Controls Identiﬁcation

If fresh air is not provided after 20 minutes, Provide Fresh Air is displayed. It displays for seven seconds

approximately every four minutes until the driver selects fresh air on the fresh/air recirculation switch or rotates the air circulation switch away from maximum air conditioning. See Chapter 4 for detailed operating instructions for the heater/air conditioner.

Low Fuel Level

The ICU continuously monitors fuel level. When the fuel level drops to 1/8th full, the word Warning ﬂashes on the message display screen above the low fuel alert.

BLINKING WARNING

RETURN TO NORMAL

OPERATION

08/17/95

NOTE: All Alert Screens follow this format.

Fig. 2.13, ICU2M Alert Screen: Low Oil Pressure

f040307

High Coolant Temp

This message and an audible warning come on whenever the engine coolant temperature exceeds the maximum allowable temperature.

If high coolant temperature is detected during the ignition sequence, it displays as an active fault and the alert screen does not appear. After 30 seconds, this message displays again.

Low Voltage

On some vehicles, this optional message and an audible warning come on whenever the ICU detects a low voltage condition.

Faulty Speedo Gauge

This message is displayed when the system detects a faulty speedometer. This becomes the default screen, and vehicle speed is displayed as a digital readout at the bottom left of the screen. All other screens and functions operate normally.

Recirc Mode Engaged/Provide Fresh Air

The Recirc Mode Engaged message appears whenever recirculated air is selected on the fresh/air recirculation switch or the air circulation switch is rotated to the maximum air conditioning position. It displays one time only for seven seconds. It notiﬁes the driver that recirculated air is being used and that fresh air needs to be provided after 20 minutes.

Turn Signal On

This message (the audible warning is optional) appears whenever the turn signal remains on beyond a preset time or distance traveled.

To dismiss this message, either turn off the turn signal or press any button on the keypad.

Service Warnings

No Datalink Activity

This message appears whenever the datalink is not receiving data. If the condition persists, take the vehicle in for service as soon as possible to discover the cause of the problem.

Mobile Screens

The following screens are available when the parking brake is off (when the vehicle is mobile) and no active fault codes are found. Press the appropriate button on the keypad to display one of the mobile screens.

•

trip miles and hours

•

fuel used and average MPG

•

leg miles and hours

2.12

Instruments and Controls Identiﬁcation

NOTE: Resetting trip miles and hours also resets leg miles and hours.

To reset a mobile screen, push the Set/Reset button twice within a 6-second period while the screen is displayed. A conﬁrmation screen will display after you press the button once.

NOTE: If the memory in the data logger is full, the screen will display Memory Full Data Not Recorded. If the data logger is not connected or not responding, the screen will display Data Recorder Not Responding. If the EVENT button was pressed within the last two minutes, the screen will display Still Recording Last Event.

Stationary Screens

The following screens are available when the parking brake is applied (vehicle is stationary) and no active fault codes are found. Each set of stationary screens has a title screen followed by one or more data screens.

IDLE HOURS 1234.56

12.3 GAL 1234567 MI

FASTEN SEATBELTS

IDLING

1234567 MILES

IGNITION ON ONLY

See applicable Figure for trip and fuel information.

ENGINE

INFORMATION

To move forward and backward through these screens, use the three arrow buttons on the keypad. See Fig. 2.14, Fig. 2.15, and Fig. 2.16 for stationary screen navigation.

Trip Information: miles, hours

ii.

Fuel information: fuel used, average MPG

iii.

Engine information: engine miles and hours, engine gallons and PTO gallons

iv.

Diagnostic information: active faults, historical dash faults

Setup Information: target MPG, brightness, language, units of measurement

vi.

Vehicle information: datalink activity/status, ICU part number, software ID number

ENG MILES 1234567.8

ENG HOURS 123456:78

ENG GALLONS 123456.7 PTO GALLONS 123456.7

02/13/96

2.13

DIAGNOSTIC

INFORMATION

See applicable Figure.

Fig. 2.14, ICU2M Engine Information and Diagnostic Information

ACTIVE FAULTS

1234 or NONE

123 HIST DASH FAULTS

LAST CLEAR 1234567

For each fault, display fault codes and description.

FIRST SECOND

For each fault, display fault codes and description.

FIRST

LAST OCCR

FIRST OCCR

LAST

LAST OCCR

FIRST OCCR

=RESET (PUSH RESET/SET KEY TWICE) =SET (PUSH RESET/SET KEY ONCE)

LAST

PUSH RESET TO

CLEAR DASH FAULTS

f040325

Instruments and Controls Identiﬁcation

01/29/98

See applicable Figure.

SETUP

INFORMATION

VEHICLE

INFORMATION

To trip information See applicable Figure.

PUSH SET KEY TO

CHANGE TARGET MPG

PUSH SET KEY TO

CHANGE BRIGHTNESS

PUSH SET KEY TO

CHANGE LANGUAGE

PUSH SET KEY TO

CHANGE UNITS

DATA LINK ACTIVE

TARGET MPG 7.0

<−−LESS MORE−−>

DISPLAY BRIGHTNESS <−−LIGHT DARK−−>

CURRENT LANGUAGE

IS FLASHING

LANGUAGE ENGLISH

FRENCH SPANISH

CURRENT UNITS

IS FLASHING

UNITS

ENGLISH METRIC

DATA LINK STATUS

USAGE 40% ERROR 6%

=RESET (PUSH RESET/SET KEY TWICE)

=SET (PUSH RESET/SET KEY ONCE)

Fig. 2.15, ICU2M Setup Information and Vehicle Information

DASH # SW#

A06−XXXXX−XXX

7.3.9

f040326a

Instruments

Standard instruments are present on every vehicle. Optional instruments, typically located on the auxiliary dash panel or right-hand control panel, are not found on every vehicle. Instruments are listed here in alphabetical order to make the information easier to ﬁnd.

Air Intake Restriction Gauge

The air intake restriction gauge indicates the vacuum on the engine side of the air cleaner. On standard installations, it is mounted on the air cleaner. As an option for easier viewing, an air intake restriction indicator (see Fig. 2.17) can be mounted on the auxiliary dash panel.

NOTE: Rain or snow can wet the ﬁlter element and cause a temporary high reading.

Air intake restriction vacuum is measured in inches of water (inH graduated indicator or a restriction gauge on the

O). For vehicles equipped with a

dash, check the gauge with the engine off. If the yellow signal stays locked in the red zone once the engine is shut down, or is at or above the values shown in Table 2.2, the air cleaner element needs to be replaced.

Air Intake Maximum Restriction Values: (inH2O)

Engine Make

Pre-EPA07

Engines

EPA07 Engines

Caterpillar 25 — Cummins 25 25

™

Detroit

20 22

Mercedes-Benz 22 22

Table 2.2, Air Intake Maximum Restriction Values

Vehicles may be equipped with a go/no-go restriction indicator without graduations (see Fig. 2.18) instead of a graduated indicator.

If air restriction exceeds the maximum allowable value, operate the vehicle for one more day, making sure not to run the engine over rated rpm. Refer to

2.14

Instruments and Controls Identiﬁcation

IDLE HOURS 1234:56

12.3 GAL 1234567 MI

FASTEN SEATBELTS

1234567 MILES

IGNITION ON ONLY

01/28/98

IDLING

TRIP

INFORMATION

FUEL

INFORMATION

ENGINE

INFORMATION

TRIP MILES 123456.7 TRIP HOURS 1234:56

FUEL USED 12345.6

AVERAGE MPG 12.34

ENG MILES 1234567.8

ENG HOURS 123456:78

IDLE HOURS 1234:56

AVERAGE MPH 12.3

R R R

IDLE GALLONS 12345.6 PTO GALLONS 12345.6

R R

ENG GALLONS 123456.7 PTO GALLONS 123456.7

=RESET (PUSH RESET/SET KEY TWICE) =SET (PUSH RESET/SET KEY ONCE)

See applicable figure

Fig. 2.16, ICU2M Trip Information, Fuel Information, and Engine Information

LEG MILES 123456.7 LEG HOURS 1234:56

f040324a

10/10/2001

Fig. 2.17, Air Intake Restriction Indicator

the engine operation manual for more information on rated rpm for your engine.

2.15

f610568

04/08/2005 f090431

Fig. 2.18, Manual-Reset Air Restriction Indicator, Go/

No-Go

If air restriction exceeds the maximum value again, replace the air cleaner element. For instructions, refer to Group 09 of the

shop Manual

Century Class Trucks Work-

Instruments and Controls Identiﬁcation

Ammeter

An ammeter measures current ﬂowing to and from the battery. When the batteries are charging, the meter needle moves to the plus side of the gauge; when the batteries are being discharged, the needle moves to the minus side. A consistent negative reading when the engine is running indicates a possible problem with the charging system.

Application Air Pressure Gauge

An application air pressure gauge registers the air pressure being used to apply the brakes, and should be used for reference only. The gauge will not register air pressure until the foot brake pedal is depressed or the trailer hand brake is applied.

Coolant Temperature Gauge

NOTICE

A sudden increase in coolant temperature may indicate engine or cooling system failure. Bring the vehicle to a safe stop and investigate the cause to prevent further damage. Do not operate the engine until the cause has been determined and corrected.

During normal engine operation, the coolant temperature gauge should read between 175 and 195°F (79 and 91°C). If the temperature remains below 160°F (71°C), inspect the cooling system to determine the cause.

If the temperature exceeds the maximum temperature shown in Table 2.3, inspect the cooling system to determine the cause. See the

Trucks Workshop Manual

repair procedures.

Maximum Coolant Temperature

Engine Make Temperature: °F (°C)

Caterpillar 215 (101) Cummins 225 (107) Detroit 215 (101) Mercedes-Benz 221 (105)

Table 2.3, Maximum Coolant Temperature

for troubleshooting and

Century Class

tion does not improve, the STOP engine lamp will also illuminate and an audible warning will sound. The engine will then derate or shut down, depending on the type of engine protection system installed.

Drive Axle Oil Temperature Gauges

NOTICE

A sudden increase in oil temperature that is not caused by a load increase may indicate mechanical failure. Bring the vehicle to a safe stop and investigate the cause to prevent further damage. Do not operate the vehicle until the cause has been determined and corrected.

During normal operation, forward-rear and rear-rear axle oil temperature gauges should read between:

•

160 to 220°F (71 to 104°C) for Meritor™drive axles;

•

180 to 200°F (82 to 93°C) for Dana Spicer drive axles.

Under heavy loads, such as when climbing steep grades, temperatures that exceed the normal oil temperature range for a short period are not unusual. If the temperature returns to normal when the load decreases, there is no problem.

Engine Oil Pressure Gauge

NOTICE

A sudden decrease or absence of oil pressure may indicate mechanical failure. Bring the vehicle to a safe stop and investigate the cause to prevent further damage. Do not operate the engine until the cause has been determined and corrected.

The engine oil pressure gauge displays the current engine oil pressure. If engine oil pressure falls below the minimum levels shown in Table 2.4, the CHECK engine lamp will illuminate. If the condition does not improve, the STOP engine lamp will also illuminate and an audible warning will sound. The engine will then derate or shut down, depending on the type of engine protection system installed.

If coolant temperature rises above the maximum temperature listed in Table 2.3 on EPA07 engines, the CHECK engine lamp will illuminate. If the condi-

2.16

Instruments and Controls Identiﬁcation

Minimum Oil Pressure

Engine Model

Caterpillar 10–20 (69–138) 30–45 (207–310) Cummins 15 (103) 35 (241) Detroit 14 (97) 55 (350) Mercedes-Benz 7 (50) 36 (250)

Pressures apply with the engine at operating temperature. Oil pressure may be higher on a cold engine. Observe and record pressures when the engine is new to create a guide for checking engine condition.

Table 2.4, Minimum Engine Oil Pressure

At Idle Speed:

psi (kPa)

At Rated RPM:

psi (kPa)

Engine Oil Temperature Gauge

NOTICE

A sudden increase in oil temperature that is not caused by a load increase may indicate mechanical failure. Bring the vehicle to a safe stop and investigate the cause to prevent further damage. Do not operate the engine until the cause has been determined and corrected.

During normal operation, the optional engine oil temperature gauge should read:

•

190 to 220°F (88 to 104°C) for Caterpillar engines;

•

200 to 260°F (93 to 126°C) for Detroit and Cummins engines

•

177 to 203°F (81 to 95°C) for Mercedes-Benz engines

Fuel Gauge

The fuel gauge indicates the level of fuel in the fuel tank(s). A single fuel gauge is standard. If equipped with an optional second fuel tank, each fuel tank level is indicated on a separate gauge.

Primary and Secondary Air Pressure Gauges

WARNING

If air pressure falls below minimum pressure, the braking ability of the vehicle will be limited. Slow the vehicle down and bring it to a gradual stop. Do not attempt to move the vehicle until air pressure has risen above the minimum level. Moving a vehicle without adequate braking power could cause an accident resulting in personal injury or death.

Air pressure gauges register the pressure in the primary and secondary air systems. Normal pressure, with the engine running, is 100 to 120 psi (689 to 827 kPa) in both systems.

A low-air-pressure warning light and audible alert, connected to both the primary and secondary systems, activate when air pressure in either system drops below 64 to 76 psi (441 to 524 kPa).

When the engine is started, the warning light and audible warning remain on until air pressure in both systems exceeds minimum pressure.

Pyrometer

A pyrometer registers the exhaust temperature near the turbocharger. Variations in engine load can cause exhaust temperatures to vary. If the pyrometer reading shows that exhaust temperature exceeds normal, reduce fuel to the engine until the exhaust temperature is reduced. Shift to a lower gear if the engine is overloaded.

Speedometer

The speedometer registers speed in both miles per hour (mph) and kilometers per hour (km/h).

Tachometer

The tachometer indicates engine speed in revolutions per minute (rpm) and serves as a guide for shifting the transmission and keeping the engine in the appropriate rpm range. For low idle and rated rpm, see the engine identiﬁcation plate.

2.17

Instruments and Controls Identiﬁcation

Transmission Fluid Temperature Gauge

The transmission ﬂuid temperature gauge indicates the transmission lubricant operating temperature. Temperatures vary by application, but the transmission ﬂuid temperature gauge reading should not exceed 250°F (121°C).

NOTICE

A sudden increase in transmission ﬂuid temperature that is not caused by a load increase may indicate mechanical failure. Bring the vehicle to a safe stop and investigate the cause to prevent further damage. Do not operate the vehicle until the cause has been determined and corrected.

Turbocharger Boost Pressure Gauge

A turbocharger boost pressure gauge indicates the pressure in the intake manifold, in excess of atmospheric pressure, being created by the turbocharger.

On a vehicle equipped with a battery isolator system, the voltmeter measures the average voltage of all the batteries when the engine is running. When the engine is off, the voltmeter shows only the isolated battery voltage and does not indicate the voltage of the engine-starting batteries.

Controls

Controls and switches are listed here in alphabetical order.

Axle Switches

Differential Lock Switch

The differential lock switch provides maximum traction for slippery conditions by forcing the wheels on each drive axle governed by the switch to rotate together. Engagement can be at any speed, provided the wheels are not slipping or spinning. See

Fig. 2.19.

Interaxle Lock Switch

The interaxle lock, standard on all dual-drive vehicles, is driver-actuated by means of a LOCK/ UNLOCK control valve switch. See Fig. 2.19. A red indicator illuminates when the interaxle lock is engaged.

Voltmeter

The voltmeter indicates the vehicle charging system voltage when the engine is running and the battery voltage when the engine is off. By monitoring the voltmeter, the driver can stay aware of potential battery charging problems and have them ﬁxed before the batteries discharge enough to create starting difficulties. Vehicles are equipped with either a voltmeter gauge, or a digital voltmeter readout located on the bottom line of the dash message center.

The voltmeter will normally show approximately 13.7 to 14.1 volts when the engine is running. The voltage of a fully charged battery is 12.7 to 12.8 volts when the engine is off. Battery voltage under 12.0 volts is considered a low battery, and a completely discharged battery will produce only about 11.0 volts.

If the voltmeter shows an undercharged or overcharged condition for an extended period, have the charging system and batteries checked at an authorized Freightliner service facility.

NOTICE

The interaxle lock should only be engaged when the vehicle is moving slowly at low throttle. Engagement at high speed or power can damage the axle(s).

Do not permit rear wheels to spin freely for more than ten seconds when traction is lost. Shift into LOCK to prevent damage to interaxle and main differentials.

Brake Controls

NOTE: See Chapter 6 for detailed information about brake systems.

2.18

Instruments and Controls Identiﬁcation

If the trailer is not equipped with spring parking brakes, pull the parking brake valve out to apply the tractor parking brakes and the trailer service brakes.

01/05/2012 f611158

1. Interaxle Differential Lock Switch

2. Fifth Wheel Slide Switch

3. Rearmost Axle Differential Lock Switch

4. Air Suspension Dump Control Switch

Fig. 2.19, Axle and Suspension Switches

Parking Brake Control Valve

NOTICE

Do not step on the service brake pedal while the parking brakes are applied. To do so can cause damage to the brake mechanisms.

The yellow diamond-shaped knob operates the parking brake valve. See Fig. 2.20. Pull the knob out to apply the tractor and the trailer spring parking brakes. Push the knob in to release the spring parking brakes. Before the spring parking brakes can be released, the air pressure in either air brake system must be at least 65 psi (447 kPa).

03/10/99

1. Trailer Air Supply Valve (red knob)

2. Parking Brake Control Valve (yellow knob)

Fig. 2.20, Brake Valve Control Knobs

f610291

Trailer Air Supply Valve

The red octagonal-shaped knob operates the trailer air supply valve, which charges the trailer air supply system and releases the trailer spring parking brakes. See Fig. 2.20.

After the vehicle and its air hoses are connected to a trailer and the pressure in the air system is at least 65 psi (447 kPa), push the trailer air supply valve knob in (and leave it in) to charge the trailer air supply system and release the trailer spring parking brakes. Pull the trailer air supply valve out before disconnecting a trailer or when operating a vehicle without a trailer.

Trailer Brake Lever

The trailer brake lever is used to apply the trailer service brakes without applying the truck or tractor service brakes. It is usually mounted on the right-hand control panel. See Fig. 2.21. The valve can be partially or fully applied, but in any partially on position it will be overridden by a full application of the service brake pedal. Move the lever down to apply the trailer brakes; move the lever up to release the trailer brakes. The lever will automatically return to the up position when it is released.

Engine Brake Switch

The Hi/Med/Lo engine brake 3-position switch controls the amount of engine braking. Press the lower third of the switch for low, center for medium, and upper third for high. See Fig. 2.22.

2.19

Instruments and Controls Identiﬁcation

Cruise control is activated by two dash-mounted switches: an On/Off switch and a Set/Decelerate/ Resume/Accelerate switch. See Fig. 2.23.

10/17/2001

Fig. 2.21, Trailer Brake Lever

Fig. 2.22, Engine Brake Switch

f610591

f61117606/04/2012

Cruise Control Switches

WARNING

Do not use the cruise control system when driving conditions do not permit maintaining a constant speed, such as in heavy traffic or on roads that are winding, icy, snow-covered, slippery, or roads with a loose driving surface. Failure to follow this precaution could cause a collision or loss of vehicle control, possibly resulting in personal injury or property damage.

NOTICE

When the cruise control is engaged, do not attempt to shift gears without using the clutch pedal. Failure to follow this precaution will result in a temporarily uncontrolled increase in engine speed. Transmission damage and gear stripping could result.

f61118104/24/2012

1. Set/Decelerate/Resume/Accelerate Switch

2. Cruise Control On/Off Switch

Fig. 2.23, Cruise Control Switches

Cruise At a Set Speed

Press the upper part of the cruise control On/Off switch to turn cruise control on.

Hold the accelerator pedal down until the speedometer reaches the desired speed.

Press the lower half of the Set/Resume/ Accelerate/Decelerate switch momentarily to set the cruise speed (with the vehicle moving at the desired speed).

To decrease cruise speed, press and hold the lower half of the Set/Resume/Accelerate/ Decelerate switch to decelerate slowly. Release the switch when the desired speed is achieved.

To increase cruise speed, press and hold the upper half of the Set/Resume/Accelerate/ Decelerate switch to accelerate slowly. Release the switch when the desired speed is achieved.

Disengage Cruise Control

NOTE: The speed memory is lost whenever the ignition is turned off or the cruise control system is turned off.

Depress the brake pedal (automatic or manual transmissions)

Depress the clutch pedal (manual transmissions only).

2.20

Instruments and Controls Identiﬁcation

Press the lower half of the On/Off switch.

NOTE: To resume the preselected cruise speed, increase vehicle speed to above minimum cruise control speed and momentarily press the upper half of the Set/Resume/Accelerate/ Decelerate switch. Cruise will return to the last speed selected.

Engine Fan Switch

To turn the engine fan on, press the upper half of the engine fan switch. See Fig. 2.24. The fan will continue to operate for a set amount of time and then turn off unless the coolant temperature is high enough to continue fan operation. To turn the fan off before the set time period ends, press the lower half of the switch.

f61117804/24/2012

Fig. 2.24, Engine Fan Switch

Ignition Switch

The ignition switch has four positions: OFF, ACC (accessory), ON, and START. See Fig. 2.25. The ignition key also locks and unlocks the cab doors, baggage door(s), and if equipped, the bunk door(s).

In the OFF position, the ignition switch is vertical. The key can be inserted and removed only in the OFF position.

The following functions are operable when the ignition switch is in the OFF position (regardless of whether the key is inserted):

•

low-beam headlights

•

taillights

•

brake lights

•

road lights

07/19/2006 f610805

Fig. 2.25, Ignition Switch

•

dome lights

•

clearance lights

•

hazard warning lights

•

turn signals

•

utility lights

•

baggage compartment lights

•

spotlights

•

horn

•

clock

•

refrigerator

•

CB radio

•

power mirrors

•

power receptacle

•

fuel heater

•

electric oil pan heater

•

electric or diesel-ﬁred engine coolant preheater

Turn the key counterclockwise to reach the ACC position. In addition to all the functions that are operable in the OFF position, the following functions are operable when the switch is in the ACC position:

•

radio/stereo system

•

heater and A/C fan

•

mirror defog

•

windshield fan

2.21

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