PREVOST X3-45 COMMUTER User Manual

SECTION 06: ELECTRICAL
1
DOB 1300-1556 | X3-45 Commuter PA-1648 Maintenance Manual Section 06 revised release October 2021
CONTENTS
SECTION CHANGE LOG ........................................................................................................................................... 4
1. TORQUE TABLES ............................................................................................................................................. 5
1.1 ALTERNATORS AND SURROUNDING COMPONENTS ..................................................................................... 5
1.2 ELECTRICAL CONNECTIONS – BATTERIES, MISCELLANEOUS ......................................................................... 6
2. GENERAL DESCRIPTION ................................................................................................................................ 11
2.1 WIRING DIAGRAMS...................................................................................................................................... 11
2.1.1 Using Wiring Diagrams ........................................................................................................................ 11
2.2 TESTING CIRCUITS ........................................................................................................................................ 12
2.3 WIRE SIZES AND COLORS ............................................................................................................................. 12
2.4 WIRE IDENTIFICATION ................................................................................................................................. 12
2.5 SPARE WIRES ............................................................................................................................................... 14
2.6 CIRCUIT BREAKERS ....................................................................................................................................... 14
2.6.1 Main Circuit Breakers On Coaches ....................................................................................................... 14
2.6.2 VECR/VECF Circuit Breakers ................................................................................................................. 14
2.6.3 Electric Cooling Fan Circuit Breakers .................................................................................................... 14
2.7 MULTIPLEX FUSES ........................................................................................................................................ 15
2.8 RELAYS ......................................................................................................................................................... 15
2.9 COOLING FAN CONNECTIONS ...................................................................................................................... 16
2.10 ELECTRONIC GROUND ................................................................................................................................. 16
2.11 PRECAUTIONS .............................................................................................................................................. 17
2.12 CORROSION INHIBITOR ................................................................................................................................ 17
3. ELECTRONIC MODULES ................................................................................................................................ 17
3.1 MCM ............................................................................................................................................................ 17
3.1.1 Replacing the MCM.............................................................................................................................. 17
3.1.2 Uploading a multiplex program update into the MCM ....................................................................... 18
3.2 I/O-EA AND I/O-EB MODULES ...................................................................................................................... 18
3.2.1 Replacing I/O-EA or I/O-EB Modules .................................................................................................... 18
3.3 ELECTRONIC MODULES CONNECTOR PIN-OUT ........................................................................................... 19
4. AVAILABLE TEST MODES .............................................................................................................................. 23
4.1 MULTIPLEX INPUT TEST ............................................................................................................................... 23
4.2 ELECTRIC MOTOR TEST SEQUENCE .............................................................................................................. 24
4.2.1 Test Sequence – Coaches ..................................................................................................................... 25
4.3 ALTERNATOR TEST ....................................................................................................................................... 26
4.4 FORCED ACTIVATION OF THE COOLING FANS ............................................................................................. 26
4.4.1 Cooling Fans Cleaning Mode Validation .............................................................................................. 26
5. LIMP-HOME MODES ..................................................................................................................................... 27
5.1 DRIVER INFORMATION DISPLAY LIMP-HOME MODE .................................................................................. 27
5.2 LOWER PRIORITY I/O-EA & I/O-EB MODULES FOR BREAKDOWN SERVICE ................................................. 27
5.3 ESSENTIAL FUNCTIONS TO OPERATE THE VEHICLE ..................................................................................... 27
5.3.1 Available Functions .............................................................................................................................. 28
6. NETWORKS .................................................................................................................................................. 29
6.1 DL0 (BBUS MUX) NETWORK ........................................................................................................................ 29
6.2 DL0 (BBUS MUX) CONNECTION ON THE TELLTALE PANEL AND THE HVAC CONTROL UNIT ....................... 29
6.3 SPARE DL0 (BBUS MUX) ............................................................................................................................... 29

PREVOST X3-45 COMMUTER Specifications

General

Engine	Volvo D13
Transmission	Allison B500
Fuel Type	Diesel
Length	45 ft (13.7 m)
Width	102 in (2.6 m)
Horsepower	500 hp
GVWR	54, 000 lbs
Height	141 in