Xe ô tô BMW X5 E70 SM 05c1_E70 Park Distance Control

Initial P
rint
Dat
e: 10/06
Table of Contents
Subject Page
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4
Park Distance Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4
Input/Output - Park Distance Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5
System Circuit Diagram - Park Distance Control . . . . . . . . . . . . . . . . . . . .6
Functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8
Functional Principle of the Ultrasonic Sensors . . . . . . . . . . . . . . . . . . . . . .8
Send Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8
Receive Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9
Function Activation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9
Automatic Activation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9
Automatic Deactivation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9
Manual Activation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10
Distance Signalling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10
Audible Distance Signalling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10
Front Detection Range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11
Rear Detection Range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11
Audio System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11
Visual Distance Signalling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12
Trailer Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .13
Rear-view Camera . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .13
System Components . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .14
Ultrasonic Sensors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .14
Greater Range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .14
Optimized Design . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .14
Wiring harness, front ultrasonic sensors . . . . . . . . . . . . . . . . . . . . . . .16

Wiring harness, rear ultrasonic sensors . . . . . . . . . . . . . . . . . . . . . . . .16
Power supply of ultrasonic sensors . . . . . . . . . . . . . . . . . . . . . . . . . . . .16
Park Dis
tance Control with Eight Channels . . . . . . . . . . . . . . . . . . . . . . .16
Park Distance Control Functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .17
Service Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .18
Diagnosis
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .18
System Limits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .18
Cleaning the Ultrasonic Sensors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .19
System Error . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .19
E70 Park Distance Control (PDC)
R
e
vision Dat
e:
Subject Page
BLANK
PAGE
3
E70 Park Distance Control
Park Distance Control
Model: E70
Production: From Start of Production
After completion of this module you will be able to:
• Describe the operation of the Park Distance Control on the E70.
• Diagnose the PDC on the E70.
4
E70 Park Distance Control
Park Distance Control

The Park Distance Control (PDC) is a distance warning system that provides both visual
and audible information on the distance to the nearest obstacle when parking and driving
out of spaces.
The park distance control is optionally available in the E70.
The distance to the next obstacle is measured by means of four ultrasonic sensors in the
rear bumper and four ultrasonic sensors in the front bumper. The distance is signalled
audibly via the speakers in the rear and front area of the vehicle. The frequency of the
signal increases as the distance to the obstacle decreases.
A continuous signal is output in very close proximity to obstacles (about 30 cm).
The distance signalling is shown in graphic form on the central information display CID.
The park distance control can be switched on and off by means of a button in the center
console switch cluster SZM.
The following changes/new features have been implemented compared to the
predecessor models:
• New converter and new control unit
• Visual representation of distance to obstacle
• Audible signalling through radio speakers
Introduction
5
E70 Park Distance Control
Input/Output - Park Distance Control
With the aid of the controller (4), representation of the park distance control (1) can be set
on the central information display (2). The trailer module (5) informs the park distance
contr
ol whether a trailer is hitched to the vehicle in order to deactivate the rear transduc-
ers (9). Park distance control is activated on engaging reverse gear with the gear selector
lever (6). The park distance control can be switched on/off with the button (8).
Corresponding to the setting of the park distance control system, the driver can be
informed both acoustically (3) and visually (2) of the distance to the nearest obstacle while
parking/ maneuvering .

The audible information is alwa
ys available when the park distance
control is activated.
Index Explanation Index Explanation
1
Park distance control
6
Gear selector lever
2
Central information display CID
7
Wheel speed sensor
3
Speaker
8
Park distance control button
4
Controller
9
Rear transducer (ultrasonic sensor)
5
Trailer module
10
Front transducer (ultrasonic sensor)
6
E70 Park Distance Control
System Circuit Diagram - Park Distance Control
7
E70 Park Distance Control
Index Explanation Index Explanation

1
Front left transducer (ultrasonic
sensor)
12 Speaker, rear driver's side
2 Front center left transducer 13 Speaker, front driver's side
3 Front center left transducer 14 Central information display CID
4 Front right transducer 15 Car communication computer*
5 Speaker, front passenger's side 16 Center console switch cluster
6 Speaker, rear passenger's side 17 PDC button
7 Park distance control PDC 18
Integrated automatic climate control
IHKA
8 Rear right transducer K-CAN Body CAN
9 Rear center right transducer KL15 Terminal 15
10 Rear center left transducer LVDS Low voltage differential signal
11 Rear left transducer
In/Out Information Source Function
In
Vehicle speed
signal
Rotation rate sensor >dynamic
stability control >junction-box
ECU>instrument cluster
Deactivation of park distance
control as from 12mph/20 km/h
In Distance signal
Rotation rate sensor > dynamic
stability control > junction-box
ECU> instrument cluster
Deactivation of park distance

control after distance of 50 m
In
Outside
temperature
Outside temperature
sensor > instrument cluster
T
emperature is one of the refer-
ence variables for calculating dis-
t
ance
In Trailer
Trailer socket towing hitch
>
trailer module
Rear park distance control deac-
tivated when trailer is connected
In
Reverse gear
s
t
atus
Gear selector lever > electronic
transmission control
Park distance control ON, with
r
everse gear engaged
Out Check contr
ol message
P

ark dis
tance contr
ol
Displa
y
of
CC message
K-CAN Signals at Park Distance Control
L
egend for System Circuit Diagram - Park Distance Control