BMW E85 Manual
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NOTE
The information contained in this training course manual is intended solely for
participants of the BMW Service Training course.
Refer to the relevant "Technical Service" information for any changes/supple-
ments to the Technical Data.
©2001 BMW AG
München, Germany. Reprints of this manual or its parts
require the written approval of BMW AG, München
VS-42 MFP-HGK-BRK-E85_1110
Contents
Page
CHAP 1 Instrument cluster 1
Introduction 1
System overview 2
- Input/output signals 2
- System schematic 4
Introduction 7
- New system features/modifications 7
Components 7
- Display areas 9
- Indicator and warning lamps 12
- LC display 18
- Program and gear display 18
- Acoustic generators 19
- Setting buttons 20
System functions 21
- Bus network 21
- On-board computer 23
- Distance to junction 23
- Display in Multi-Information Radio 24
- Redundant data storage (RDA) 25
Country-specific version 26
- Country-specific version: instrument cluster 26
Notes for Service 30
- Test functions 30
- Diagnosis 35
SIA IV service interval indicator 37
E85 Instrument cluster
- 1 -
Instrument cluster
Introduction
Instrument cluster/SIA
The instrument cluster in the Z4 has a sporty appearance in line
with a roadster.
The instrument cluster is very compact. The needle instruments
are integrated in 2 housing attachments.
The two needle instruments for the speedometer and the
revcounter are thus the predominant visual features.
The needle instruments for the fuel gauge and the coolant
temperature gauge are integrated in the revcounter.
The speedometer incorporates an LC display, which shows e.g.
the total mileage (odometer), the trip distance (trip odometer),
the time, the on-board computer functions and the SIA service
interval indicator.
Between the large needle instruments are the indicator and
warning lamps and the program and gear display.
The program and gear display is only featured in vehicles with
automatic transmissions and SMG sequential manual
gearboxes.
The instrument cluster is the central gateway in the bus network.
E85 Instrument cluster
- 2 -
System overview
- Input/output signals
Fig. 1: E85 System overview with input/output signals
Input signal
Output signal
KT-9915
E85 Instrument cluster
- 3 -
Index Explanation Index Explanation
1 Handbrake switch 10 Ground supply, terminal 31
2 Brake-lining wear sensors 11 Fuse-carrier with
terminals 30, R and 15
3 Coolant level switch 12 Outside-temperature sensor
4 DSC control unit 13 Fuel-tank sensor 1
5 Oil-pressure switch
(6-cylinder engine only,
otherwise PT-CAN bus)
14 Fuel-tank sensor 2
6 Axial button in steering-
column stalk for turn-signal
indication
15 PT-CAN bus
(Powertrain CAN bus)
7 Starter motor, terminal 30h 16 K bus (body electronics)
8 Reversing-light switch
(for manual gearboxes only;
otherwise signal from
gearbox control unit)
17 Diagnosis bus
9 Instrument cluster
E85 Instrument cluster
- 4 -
- System schematic
Fig. 2: E85 System schematic, instrument cluster KT-9957
E85 Instrument cluster
- 5 -
Index Explanation Index Explanation
1 Brake-lining wear sensor,
front left
11 Handbrake switch
2 Digital Motor Electronics
DME
12 Fuel-tank sensor 1
3 Dynamic Stability Control
DSC
13 Fuel-tank sensor 2
4 Outside-temperature sensor 14 Brake-lining wear sensor,
rear right
5 Coolant level switch D-Bus Diagnosis bus
6 Oil-pressure switch
(6-cylinder engine only,
otherwise PT-CAN bus)
K-Bus Body bus
7 Instrument cluster Kl. 31 Terminal 31 (ground)
8 Axial button, on-board
computer, in steering-
column stalk for turn-signal
indication
Kl. 30h Starter motor, terminal 50
9 Reversing-light switch
(for manual gearboxes only;
otherwise signal from
gearbox control unit)
PT-CAN Powertrain CAN bus
10 Fuse-carrier with
terminals 30, R and 15
E85 Instrument cluster
- 6 -
Instrument-cluster plug connection
The 26-pin plug connection is located on the reverse side of the
instrument cluster.
Fig. 3: Reverse side of E85 instrument cluster
Index Explanation
1 Plug connection, plug connector, 26-pin
2 Sound opening, acoustic generator
KT-10498
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