Specifications

FCS1362 Page 41 of 74 © Nov 2010
• The equipment should be designed to handle the power requirements of the auxiliary equipment.
See section 4.6.3 regarding fusing
4.5. Audio muting and audio routing facilities
When an ICE mute is available and asked for by the customer the compatibility of the equipment must be
checked.
Care should be taken not to damage or compromise the existing wiring in the vehicle.
Depending on the equipment the muting and audio routing method may be one of the following:
• Manufacturer’s built-in interface harness that will require an additional interface lead
• Vehicle specific tele-mute lead, possibly incorporating power supply lead, that connects directly into
the vehicle radio wiring harness
• An interface unit on the ICE loudspeakers allowing the mobile radio equipment to use the ICE
speakers
• A direct mute line allowing the mobile radio equipment to be used with its own hands free speaker
• A mobile radio equipment mute line operating a normally closed relay to switch off the ignition feed to
the ICE
4.5.1. Guidelines for removal, connecting & refitting of ICE
If an ICE system is to be removed to fit a mounting bracket or to connect a mute then care should be
exercised in utilising the correct and appropriate radio removal tools for that particular unit.
Always ensure that any CDs are ejected from the ICE unit before removing it, as they can become
jammed if the unit is inverted with discs inside.
As per section 3.1 ensure details for reinstating the equipment, such as a security code, are available.
4.5.1.1. ICE audio integration, mute lead, ISO2CAR & SOT Ieads
When installing with the radio equipment a custom made unit, adapter or cable loom that mutes the ICE
audio when a call is being made, which includes the constant power feed, ignition switched power feed or
ignition sense and earth lead, the following checks should be made to ensure everything is compatible:
• vehicle make and model and build year
• the ICE system being connected to
• the equipment being fitting i.e. hands free car kit model
• the permanent and switched feeds should be checked
o i.e. permanent is constant voltage and the switched feed off when the vehicle ignition is
switched off
• all equipment earth connections remain earthed to the vehicle when the ignition is switched off
• correct fuses should be used in the power cables
• the fuse ratings are correct for the application
o the cable/fuse rating of the muting device must be checked to ensure compatibility with the
equipment being installed. Some high power communication equipment is not suitable to be
used in conjunction with mute leads as the power rating required is higher than the ignition
feed in the mute lead can provide.
No other additional accessories should be connected to any of the leads used in the audio integration
installation.
The installation instructions of the lead being installed should be consulted and followed carefully at all
times. Use of the lead may include specific configuration requirements so be particularly careful with this
if needed.
4.5.1.2. Wiring harness checks
Once the ICE unit has been disconnected from the vehicle on the vehicle’s wiring harness plug, using a
multi-meter, ascertain and note the location, voltages and state of: