Volvo FM9, FM12, FH12 Wiring Diagram
Service Manual
Trucks
Group 37
Release 02
Wiring diagram
FM9, FM12, FH12 VERSION2
TSP175664
Foreword
The descriptions and service procedures contained in this manual are based on designs and methods studies carried out up to August 02.
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 refer-
ence to V.S.T. (Volvo Standard Times).
Service procedures which do not include an operation number in the title are for gen-
eral 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 oc-
cur.
Volvo Truck Corporation
Göteborg, Sweden
The following information will be superseded by this
manual:
SM Group 37 TSP 169444
Order number: TSP175664
© 02 Volvo Truck Corporation, Göteborg, 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.
ENG11869
Contents
Example of wiring diagram ................................................................... 2
Component wiring diagram index ....................................................... 5
Component wiring diagrams ................................................................ 8
Illustrations index ................................................................................ 76
Illustrations ........................................................................................... 77
Fuses ................................................................................................... 137
Relays ................................................................................................. 139
Wiring harness illustration index ..................................................... 141
Earth connections ............................................................................. 144
List of earth connections ................................................................... 146
List of connectors ............................................................................. 147
List of components ........................................................................... 154
Abbreviations ..................................................................................... 160
Cable colour code ............................................................................. 161
Feedback
1
Example of wiring diagram
Component wiring diagram title, variant/subtitle and symbol.
Coordinates (B 1).
30 Voltage battery, kl.30.
15 Voltage with starter key in drive position, kl.15.
DR Voltage with starter key in drive position, preheat position and start position, kl.DR.
61 Voltage when alternator charges, kl.61.
Splice.
Fuse.
Reference arrow, for diagram BA, coordinates 0 C, component A17, connector PA pin 29.
2
The maximum of variants are drawn, think about that all
wires and components are not standard for all markets or
vehicle models.
Switch.
Relay.
Conductor on circuit card.
Connector MB terminal 9.
Wire area and colour.
Thin lines, wires.
3
Earth connection point 4, earth connection 1 and wire 2.
Earth connection to circuit card.
Earth connection without wire.
Same splice can be drawn on several diagrams. The wire
from the splice to the earth connection point will only be
drawn and coded on one diagram. On the other diagrams
will only the earth connection point be written besides the
splice.
4
Component wiring diagram index
AA
AE
BA
BI
BM
BN
BU
CM
CO
CP
CS
CU
DB
DE
Power supply, starting system ......................................................................................... page 8
ADR, main switch ............................................................................................................ page 9
Vehicle ECU .................................................................................................................... page 10
Instrument cluster ............................................................................................................ page 11
Tachograph in dash ......................................................................................................... page 12
Tachograph in shelf ......................................................................................................... page 13
Dynafleet .........................................................................................................................
Engine interface ...............................................................................................................
Engine (D9/D12) ..............................................................................................................
ISX functions, 12V trailer ABS converter (AUS only) .....................................................
Engine ISX (AUS only) ....................................................................................................
Fuel filter water drain .......................................................................................................
Gear selector ECU ..........................................................................................................
Geartronic automatic gearshift ........................................................................................
page 14
page 15
page 16
page 17
page 18
page 19
page 20
page 21
DI
DM
DN
DQ
DU
EC
EE
EI
EM
EN
EQ
FA
FG
FK
Powertronic ......................................................................................................................
Retarder manual gearshift ...............................................................................................
I-shift ................................................................................................................................
Power take off ..................................................................................................................
Diff-lock ............................................................................................................................
Trailer ABS/EBS supply ...................................................................................................
ABS basic, D-version ......................................................................................................
ABS/ASR D-version .........................................................................................................
EBS ECU .........................................................................................................................
EBS modulators ..............................................................................................................
ESP .................................................................................................................................
Air-suspension ................................................................................................................
Load indikator ..................................................................................................................
Bogie lift A-ride ................................................................................................................
page 22
page 23
page 24
page 25
page 26
page 27
page 28
page 29
page 30
page 31
page 32
page 33
page 34
page 35
FM
FP
FQ
FU
GA
Axle lock, self steered axle .............................................................................................
Hydraulic steered axle .....................................................................................................
Air dryer ...........................................................................................................................
Central lubrication system ...............................................................................................
LCM head lights ..............................................................................................................
page 36
page 37
page 38
page 39
page 40
5
GB
LCM trailer, HL-HID .........................................................................................................
page 41
GC
GK
GM
GQ
GU
HG
HI
HM
HP
HY
IA
IE
IF
IH
LCM rear lights ................................................................................................................
Trailer connections (AUS only) ........................................................................................
Wiper, washer ..................................................................................................................
Horn .................................................................................................................................
Headlights adjust .............................................................................................................
Climate unit, CU,-BAS,-MCC,-ECC .................................................................................
Air heater .........................................................................................................................
Water heater ....................................................................................................................
Short stop cabheater .......................................................................................................
Climat unit, CU,-HEAT,-ACMAN,-ACAUT. .......................................................................
El. heated/adj. seat .........................................................................................................
El. heat/adj. mirrors, El. window winders ........................................................................
Foldable mirror bracket ....................................................................................................
Interior light ......................................................................................................................
page 42
page 43
page 44
page 45
page 46
page 47
page 48
page 49
page 50
page 51
page 52
page 53
page 54
page 55
IM
IQ
IR
IS
IU
IX
IZ
KA
KE
KI
KM
ME
NA
NC
Central locking, immobiliser ............................................................................................
El. sunroof, cig. lighter, refrigerator .................................................................................
12V power supply ............................................................................................................
SWM, SRS. Air-bag .........................................................................................................
Radio ...............................................................................................................................
Intergrated telephone ......................................................................................................
Backup camera ................................................................................................................
Cab tilt .............................................................................................................................
Load light, 5:th wheel lamp .............................................................................................
Light sign ......................................................................................................................... page 65
Beacon warning light ....................................................................................................... page 66
Extra fuse block, key switch relay ...................................................................................
Body builder (BB), auxsw-6 and swapbody ....................................................................
Body builder (BB), ELCE-CK, BBM, PTO2 .....................................................................
page 56
page 57
page 58
page 59
page 60
page 61
page 62
page 63
page 64
page 67
page 68
page 69
NI
NK
NR
NU
XA
XB
6
Extra spotlamps front/roof, max 4x70W ..........................................................................
Burglar alarm ...................................................................................................................
Body builder (BB), tipper tractor ”HYDRKIT” ..................................................................
Body builder (BB), DUAL-SPEED ...................................................................................
Bus J1708/J1587 .............................................................................................................
Bus J1939 .......................................................................................................................
page 70
page 71
page 72
page 73
page 74
page 75
Component wiring diagrams
7
T3016280
8
T3016252
9
T301625310T3016254
11
T301625512T3016256
13
14
T3016257
T3016258
15
T301625916T3016260
17
T301626118T3016262
19
T301626320T3016264
21
T301626522T3016266
23
T301626724T3016268
25
T301626926T3016270
27
T301627128T3016272
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