EMERGENCY OPERATION
If there is a failure of the LM processor, an emergency circuit is activated within the LM. This will allow the following lights to function for driving safety.
- Side marker/tail lights.
- Low-beam lights.
- Brake lights.
- Turn signals.
In emergency operation the following lights will not operate
- Dimming control (full bright).
- Hazard lights.
- High-beam lights.
- Headlight flash.
- Fog lights.
- Back-up lights.
The I-BUS communication to the LM will also be interrupted.
Functional Description
The E38/E39 system comes on-line when the lights are switched on.
The LWR control electronics then cycles the stepper motors through their full range of motion and stops at a default position.
The control electronics monitors the level sensor input signals to determine the vehicles load angle and adjusts the beam position accordingly. As the vehicle is driven it continually monitors the level sensor signals and if necessary updates the headlight beam positions every 25 seconds on the E46 or momentarily on the E38/E39 system.
Abrupt fluctuations of the sensor signals are filtered to prevent unnecessary adjustment as well as monitoring road speed and brake pedal application as correction factors.
Headlight Alignment
The procedure for aligning Xenon Headlights with LWR is the same as conventional halogen bulb systems with one additional step. Wait at least 30 seconds for the LWR to cycle and adjust to it's calculated position.
LWR Diagnosis
The LWR control module of the E38/E39 is diagnosible using the DIS/MoDiC. The headlights must be switched on in order to start diagnosis.
The E46 LSZ incorporates LWR diagnosis program.
Scheme 223
Overview of the Radios for Each Model
| RADIO | TYPE | MANUFACTURER | MODEL | INTRODUCTION DATE |
|---|---|---|---|---|
| C53 | Business with cassette | Philips | E46 | 3/01 |
| CD53 | Business with in-dash CD | Alpine | E46 | 3/01 |
| C53 | Business with MID control and cassette | Phillips | E39/E53 | 9/00 E39 10/00 E53 |
| CD53 | Business with MID control and in-dash CD | Alpine | E39/E53 | 9/00 E39 10/00 E53 |
| C53 | Business MIR without cassette | VDO | E52 | Start of production |
| BM53 | Business with BM control | Becker | E46/E39/E53 | 03/01 E46 02/01 E39 04/01 E53 |
OVERVIEW OF THE RADIOS FOR EACH MODEL
Scheme 224
Functional Overview
NG Radios
Radio Operation with KL R off
Operation is possible with the key off on the C53 and CD 53 radios. If the radio is turned on with KL R off, it will operate for 16 minutes until the General Module sends the sleep command. The radio can be turned on and off as many times desired.
Diversity Antenna
Antenna diversity has been adapted to the new generation of radios. When the radio is in operation, the diversity control unit is activated by the "RAD ON" signal.
World Frequency Radio
Radios on vehicles sold in the U.S. are world radios. Specific country settings can be made using the service mode. The settings are stored in an EEPROM.
Car Memory
If programmed, when locking the vehicle using the remote transmitter the
- Last station
- Volume setting
- Last audio mode (Tape, FM, CD etc.)
are stored according to the key number used. Unlocking the vehicle with the same transmitter will restore the settings. There is a maximum setting for volume which may be lower than the setting when the radio was last operated.
Clock
Time can also be displayed when KL R is off by pressing the clock button on the Radio/MID.
Backlighting
The LCM/LSZ produces two signals for the control of radio backlighting.
- Hardwired KL 58g.
- Lights on/off over the K/l Bus.
The radio contains a photo-cell for adjustment of backlighting to ambient conditions.
Reset and Voltage Monitoring
A radio reset is triggered by under voltage or the internal processor monitor. The reset function restarts the radio, similar to turning it off and back on again. Operating voltage is measured at the KL 30 input. The radio is switched off if the system voltage exceeds 17V to protect the radio, it will switch on when the voltage falls below 16V.
GAL (Speed Dependent Volume)
The speed signal from the IKE/KOMBI is available to the radio over the K/l Bus. GAL is not a feature on vehicles equipped with DSP.
Bus Communication
The radio communicates with other modules via the K bus or I Bus dependent on the model. The information shared over the bus line includes
- IKE/KOMBI - Terminal status (KL 15, KL R).
- LCM/LSZ - Lights on.
- IKE/KOMBI link to TXD - Diagnosis.
- MID or BMBT - button or rotary knob status.
- GM - Key used to lock or unlock vehicle.
- MFL - audio controls status.
NG radios do not use anti-theft codes. Operation of the radio is only possible if connected to a bus line and the detection of at least one other component.
System Operation
When KL15 is switched "ON", the PDC system is switched "ON", in the standby mode. The system performs a self-check of the ultrasonic sensors and control electronics.
When the transmission is shifted into reverse, the system is activated and the sensors are activated in the pre-determined order.
Scheme 225
The system stays active up to approximately 20 MPH. Above this, the system reverts to the standby mode.
If an object is detected within the operating range of the sensors, the control module will activate the respective gong/speaker (front/rear). The sensor closest to the object will receive additional activations to determine if the object is getting closer.
Scheme 226
As the distance to the object decreases to approx. 11/2 feet, the control module increases the activation frequency of the sensor. The output frequency of the gong will increase linearly up to a distance of approx. % of a foot. At this time the frequency will change to a constant tone.
As the distance to the object increases, the frequency of the sensor and gong activation decreases until the object is out of the monitoring range of the sensor.
