SAAB WIS ONLINE

Brief description

Brief description

General

A connection for a mobile phone is a standard feature in the car. It provides simultaneous power supply for charging the telephone battery. When the phone is in use, the sound emitted by the selected source is automatically disconnected and switches to the sound of the telephone (line-in). The telephone volume can be preset and adjusted during a call.

As an option, a mobile phone connection with “handsfree” function is available. Handsfree means that a call can be taken without lifting the receiver.

When a telephone is connected “handsfree”, the incoming telephone sound is fed into, and emitted by, the audio system. At the same time, the normal sound is disconnected. The outgoing telephone sound is picked up by a built-in microphone in the car.

The following units are included in the audio system:


Main unit, Audio System

SID

Amplifier (Premium and Prestige only)

Speakers

Steering wheel switches

Telephone connection


Main unit

The main unit for the telephone system is the audio system's main unit.

Display

The telephone system utilizes the SID display to indicate that the telephone is active. The display information is sent on the bus from the audio system and is read by SID.

Amplifier

The Premium and Prestige audio systems both have external amplifiers that are capable of reproducing the sound of a telephone call.

Speakers

The audio system has side and centre speakers in the dashboard as well as in the front and rear doors. The Prestige system also includes woofers in the parcel shelf. These can reproduce the sound from an incoming telephone call.

Steering wheel switches

The volume of the incoming telephone call can be controlled safely and simply with the steering wheel controls.

The switches are connected to SID which reads their positions and sends information to the main unit via the bus.

P bus and I bus


All the control modules in the Saab 9-5 are connected to the bus except those for the ABS and SRS.

The buses are divided into the Powertrain bus (P-bus) and the Instrument bus (I-bus). Both buses are connected to the main instrument unit (MIU). The buses are electrically isolated from each other.

The data transfer rate on the P bus is ten times faster than on the I bus.

All the information sent from one control module is accessible for all other control modules on the bus. The MIU is responsible for ensuring that information available on one bus is also available on the other bus.