BMW E85 Handbuch

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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.

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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