diagram BMW 318ti 1998 E36 Electrical Troubleshooting Manual





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0110.0 INTRODUCTION









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Schematics
The schematics divide the entire vehicle electrical system into individual circuits. Interacting
electrical components are shown on one common schematic.
Switches and other components are represented in such a way that their general layout and
function are self–explicit. They are arranged on the sheet such that the current path can be
followed from positive (top) to negative (bottom).
Important: The components and wires are not drawn to scale. For instance, a lead with a length
of over 1m can be shown as a lead that is only a few cm long. To ensure clear arrangement , all
connectors, lines branches and connected components from the fuses to the component and
from the component to ground connection are not shown within the individual cells. If required,
reference can be made to cells 0670.3 Fuse Details and 0670.4 Ground Distribution where all
lines are illustrated with all plug connections, line branches and connected components.
All circuit sysmbols used are listed and explained in cell 0140.0 Symbols.
In cell 7000.0 Component Location Chart all important connectors, ground points and
components are listed in tabular form. It provides a precise description of the component
locations in the vehicle.
In cell 7100.0 Component Location Views the location of connectors and components which
are difficult to locate are shown in line arts or illustrations. In cell 8000.0 Splice Location Views
all splices are listed in numerical order and illustrations are provided to assist in locating splices
on larger harnesses. In cell 8500.0 Connector Views diagrams of connectors with more than 2
pins are illustrated.
Included in this ETM are foldout block diagrams. These are overviews of the entire system (EGS,
ABS, AC etc.) which helps understand the relationships between various components and control
unit of the system being diagnosed.

Example
General conventions can be explained based on the following schematic example.
 


BLOCK DIAGRAM






!


SYMBOLS
A1
GENERAL MODULE
228 17 118 9
C
6160.0 6160.0C
M17
LUGGAGE COMPARTMENT
LOCK MOTOR
23 20M12
DRIVER’S DOOR
LOCK MOTOR
N17
CRASH CONTROL
MODULE
N1
ANTI–THEFT
CONTROL MODULE
(DWA) 5126.0 5126.0
6575.1
A
54
S5
WIPER/WASHER
SWITCH 6160.0 6160.0 6160.0
M3
WIPER MOTOR
1C
S14
DRIVER’S DOOR
JAMB SWITCHS15
REAR RIGHT DOOR
JAMB SWITCH
S16
LEFT REAR DOOR
JAMB SWITCH S13
PASSENGER’S
DOOR JAMB
SWITCH 15
3
2A
P91
REAR POWER
DISTRIBUTION BOX
6
PIN AND
CONNECTOR NUM-
BERS ONLY ON
THE CONTROL
MODULE
DASHED LINE INDICATES
THAT FURTHER CIRCUITS
ARE IN THE PATH
BETWEEN COMPONENT
AND CONTROL MODULE
EXAMPLE: CONNECTORS
C PIN 17 AND C PIN 11 GO
TO M17, CONNECTORS A
PIN 23 AND A PIN 20 GO
TO M12
A
THIS CELL CONTAINS A
DETAILED INFORMATION OF
THE PATH BETWEEN COM-
PONENT AND CONTROL
MODULE
B
AD
COMPONENTS
WITHOUT PIN OR
CONNECTOR NUM-
BERS
EXAMPLE:
CONNECTOR C PIN 1
GOES TO S13,
CONNECTOR B PIN 15
GOES TO S14
DESCRIPTION OF THE
CONTROL MODULE
CONNECTORSX253
X255X332
X254BCD
=
=
=
=
F317.5A6100.0-03COMPONENT IS
SHOWN IN CELL
ON PAGE AS
LABELED
 





BLOCK DIAGRAM
0670.5 DATA LINK






TXDRXD
D100
DATA LINK
CONNECTOR
!
CENTRAL BODY
ELECTRONICS
(ZKE IV)
6100.0
SLIP CONTROL
(ABS)
3450.0BOARD
COMPUTER
(BC – LOW)
6581.3
SLIP CONTROL
(ABS/ASC)
3450.1
CRUISE CONTROL
(TEMPOMAT)
6571.0 ELECTRONIC
TRANSMISSION
CONTROL
(EGS A4S 270R)
2460.2
SUPPLEMENTAL
RESTRAINT
SYSTEM (AIR BAG)
3234.0
 

ENGINE CONTROL
SYSTEM (DME M5.2,
4–CYLINDER M44)
1210.20
DRIVE–AW AY
PROTECTION
(EWS II)
6135.0 INSTRUMENT
CLUSTER
6211.0