CONTROL MODULE Volvo C70 II

CONTROL MODULE

Remote Digital Audio Receiver (RDAR) has the task of receiving both digital satellite and terrestrial radio signals, process them and transmit them onward on the MOST network.

In C70, the remote digital audio receiver (RDAR) is located on the right side at the rear wheel housing above the global positioning system module (GPS).

The control module has serial optical communication with other components in the MOST network. This means that all communication with Remote Digital Audio Receiver (RDAR) occurs via the Infotainment control module (ICM) or on the initiative of the Infotainment control module (ICM).

The control module checks the input and output signals through an integrated diagnostic system.

The control module communicates with directly connected components, and via MOST communication.

Any diagnostic trouble codes are stored in the control module memory. The information can be read out via the data link connector in the vehicle.

For further information, see SIGNALS .

The table below summarizes the input signals to and output signals from the Remote Digital Audio Receiver (RDAR). The signal types are divided into directly connected signals and MOST communication. The illustration below (Scheme 128) displays the same information with the Volvo component designations.

Scheme 128

The system for digital radio reception consists of

1. antenna for digital satellite and terrestrial radio
2. Remote Digital Audio Receiver (RDAR)

The remote digital audio receiver (RDAR) has the task of receiving digital satellite and terrestrial radio signals. The remote digital audio receiver (RDAR) uses the signal that is the strongest at that instant.

Frequency range for radio reception

1. satellite transmitter 2320.0 - 2332.5 MHz
2. terrestrial 2324.2 - 2328.3 MHz

The quality of the sound does not deteriorate in the event of poor reception, the sound is switched off temporarily instead. For example, if the antenna is covered by a roof box.

A Volvo SIRIUS satellite radio subscription must be activated in order for the satellite radio to function. Activation is carried out by the customer ringing Sirius and giving the serial number of the Remote Digital Audio Receiver (RDAR). The serial number can be obtained in the display for the Infotainment module (ICM).

Scheme 129

The Remote Digital Audio Receiver (RDAR) has an antenna. The antenna receives digital satellite and terrestrial radio signals. The antenna is directly connected to the Remote Digital Audio Receiver (RDAR).

The antenna is mounted in the cargo compartment on C70.

There are diagnostics for the antenna.

This function can be used to continuously read off the values and status of the control module's input and output signals.

This function can be used to read parameters, status identifiers and counters stored at the same time as a diagnostic trouble code (DTC). These are called frozen values.

Software can be downloaded to the Remote Digital Audio Receiver (RDAR). When software is ordered, the vehicle' software and hardware is compared to Volvo's central database. If they are compatible, the software is downloaded to the system.

If the comparison between the car and Volvo's central database does not correspond, then the database is updated with the vehicle's configuration. When this is complete the software is downloaded.

After replacing the control module the module's unique ID number must be programmed in the Central electronic module (CEM).

If a problem arises after software download and the control module does not work, try switching the ignition off/on.

Select the MOST network for a total download of software to the vehicle.

A Volvo SIRIUS satellite radio subscription must be activated for a satellite radio to function.

Activation is carried out by the customer ringing Sirius and giving the serial number for the Remote Digital Audio Receiver (RDAR). The serial number can be obtained in the display for the infotainment control module (ICM).

Scheme 130

During radio reception, the digital radio signals are received by the antenna system and transmitted to the remote digital audio receiver (RDAR) (16/145) where they are decoded. The remote digital audio receiver (RDAR) then transmits the signals onwards via the MOST network to the infotainment control module(ICM) (3/281) and the integrated audio module (IAM) (16/1) or the audio module (AUD) (16/105) depending on the vehicle configuration.

Remote Digital Audio Receiver (RDAR) uses the signal, satellite or terrestrial, which is strongest at the time.

Remote Digital Audio Receiver (RDAR) has the task of receiving both digital satellite and terrestrial radio signals, process them and transmit them onward on the MOST network.

In C70, the remote digital audio receiver (RDAR) is located on the right side at the rear wheel housing above the global positioning system module (GPS).

The control module has serial optical communication with other components in the MOST network. This means that all communication with Remote Digital Audio Receiver (RDAR) occurs via the Infotainment control module (ICM) or on the initiative of the Infotainment control module (ICM).

The control module checks the input and output signals through an integrated diagnostic system.

The control module communicates with directly connected components, and via MOST communication.

Any diagnostic trouble codes are stored in the control module memory. The information can be read out via the data link connector in the vehicle.

For further information, see SIGNALS .

The table below summarizes the input signals to and output signals from the Remote Digital Audio Receiver (RDAR). The signal types are divided into directly connected signals and MOST communication. The illustration below (Scheme 131) displays the same information with the Volvo component designations.

Scheme 131