Volvo Service Manual (EN)

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Foreword The descriptions and service procedures contained in this manual are based on designs and methods studies carried out up to March 96. The products are under continuous development. Vehicles and components produced after the above date may therefore have different specifications and repair methods. When this is judged to have a significant bearing on this manual, supplementary service bulletins will be issued to cover the changes. The new edition of this manual will update the changes. In service procedures where the title incorporates an operation number, this is a reference to V.S.T. (Volvo Standard Times).

Service procedures which do not include an operation number in the title are for general information and no reference is made to V.S.T. The following levels of observations, cautions and warnings are used in this Service Documentation: Note: Indicates a procedure, practice, or condition that must be followed in order to have the vehicle or component function in the manner intended. Caution: Indicates an unsafe practice where damage to the product could occur. Warning: Indicates an unsafe practice where personal injury or severe damage to the product could occur. Danger: Indicates an unsafe practice where serious personal injury or death could occur.

Volvo Truck Corporation Gцteborg, Sweden Order number: TSP23709/1 © 96 Volvo Truck Corporation, Gцteborg, Sweden All rights reserved. No part of this publication may be reproduced, stored in retrieval system, or transmitted in any forms by any means, electronic, mechanical, photocopying, recording or otherwise, without the prior written permission of Volvo Truck Corporation. ENG01858

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Contents Component wiring diagram index ........................................................ 2 Component wiring diagrams ................................................................ 4 Illustration index .................................................................................. 49 Illustrations ........................................................................................... 50 Circuit board (32) electrical centre ................................................... 102 Fuses on circuit board (32) electrical centre ................................... 104 Relays on circuit board (32) electrical centre ..................................

105 Cable harness illustration index ....................................................... 106 List of connectors .............................................................................. 109 List of components ............................................................................ 114 Abbreviations ..................................................................................... 119 Cable colour code .............................................................................. 120 Feedback 1

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Component wiring diagram index

Group 37 Wiring diagram Component wiring diagram index Component wiring diagram index AA Starter system, engine preheating ................................................................................. page 4 BL Ul, exhaust brake, exhaust pressure governor (FH12) .................................................... page 5 BN EDC, exhaust brake, exhaust pressure governor (FH16) ................................................ page 6 CE Head light, parking light,marker light, DIM-DIP ............................................................... page 7 CG Foglight, rear fog light ......................................................................................................

page 8 CH Spotlight (STD) ................................................................................................................ page 8 CI Spotlight (EU) .................................................................................................................. page 8 CK Brake light ........................................................................................................................ page 9 CL Trailer controlled exhaust brake ....................................................................................... page 9 CN Direction indicator, hazard warning light ..........................................................................

page 10 EA Reversing light, reversing warning ................................................................................... page 10 ED Loading light, fifth wheel light .......................................................................................... page 11 EJ Roof sign light (L1H1/L2H1) ............................................................................................ page 11 EK Roof sign light (L2H2) ...................................................................................................... page 11 ER Interior light (L1H1/ L2H1) ...............................................................................................

page 12 ES Interior light (L2H2/ L2H3) ............................................................................................... page 13 EV Cigarette lighter ............................................................................................................... page 14 EX 12 V outlet in cab ............................................................................................................. page 14 FA Horn ................................................................................................................................. page 15 GA Windscreen wipers and washers, headlamp wipers and washers ..................................

page 15 HA Climate unit ...................................................................................................................... page 16 HB Cab heater EBERSPДCHER D1LC ................................................................................ page 17 HD Electrically heated and adjusted seat .............................................................................. page 18 HG Electrically heated mirror ................................................................................................. page 18 HH Electrically operated mirror ..............................................................................................

page 19 HK Air dryer ........................................................................................................................... page 19 HM Fuel filter heater, waterseperator heater .......................................................................... page 19 HP Electrically cab tilt ........................................................................................................... page 20 JA Radio, voltage divider, loudspeaker, alarm clock ............................................................. page 21 KA Electrically operated window winders ..............................................................................

page 22 KB Electrically operated sunroof ........................................................................................... page 22 KE SRS-air bag ..................................................................................................................... page 23 KG Electrically operated passenger door lock ....................................................................... page 23 KH Central door lock .............................................................................................................. page 23 LD Power take-off ..................................................................................................................

page 24 LE Double power take-off ...................................................................................................... page 24 2

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Component wiring diagram index

Group 37 Wiring diagram Component wiring diagram index LG Differential lock ................................................................................................................ page 25 LO GEARTRONIC- automatic gear shift ............................................................................... page 26 MA Bogie lift hydraulic ............................................................................................................ page 27 MD Bogie lift hydraulic, with axle load limiter .........................................................................

page 28 MN Air suspension 4x2 .......................................................................................................... page 29 MP Air suspension 6x2, bogie lift, ...................................................................... page 30 MQ Air suspension 6x2, bogie lift, ........................................ page 31 MR Air suspension 6x2, bogie lift, pusher .............................................................................. page 32 MS Air suspension 6x2, bogie lift, 15 tonnes .........................................................................

page 33 MV AIR-DUMP-drive axle load increase (RADT-A8) ............................................................. page 34 MW AIR-DUMP-drive axle load increase with time limitation (RADT-A8) ............................... page 34 MX Air suspension 6x4 .......................................................................................................... page 35 MY Air suspension 6x4, ........................................................ page 36 NA Instrument LHS unit (standard design) ............................................................................

page 37 NB Instrument central unit .................................................................................................... page 38 NC Instrument RHS unit (standard design) ........................................................................... page 39 NG Instrument LHS unit (DIS) ............................................................................................... page 40 NJ Instrument RHS unit (DIS) ............................................................................................... page 41 NO Instrument control lamps module ....................................................................................

page 42 OA ABS, anti-lock brakes ..................................................................................................... page 43 OG Retarder ........................................................................................................................... page 44 PA Headlight level control ..................................................................................................... page 45 XA Extra fuses ....................................................................................................................... page 45 XD Key switch relay, rheostat ................................................................................................

page 46 ZA Earth connections ............................................................................................................ page 47 ZB Earth connections ............................................................................................................ page 48 3

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