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.