English | 11For Good ReceptionTo assure good reception, note thefollowing:• Communicate with the cell phone withinthe line-of-sight distance of 10 m (30ft). The communication range becomesshorter depending on the surroundingenvironment. The communicationrange also becomes shorter when thereis an obstacle between this unit andthe cell phone. The above maximumcommunication range (10 m) is notalways assured.• A broadcast station or walkie-talkielocated nearby can interfere withcommunication due to a too strongsignal.Installation accessories1.....12.....23[1][2].....1 (3m)4[1].....15[1].....16[1].....37[1].....1[1] KDC-BT73DAB only[2] KDC-BT53U onlyConnecting the ISO ConnectorThe pin arrangement for the ISO connectorsdepends on the type of vehicle you drive.Make sure to make the proper connectionsto prevent damage to the unit.The default connection for the wiringharness is described in 1 below. If the ISOconnector pins are set as described in 2,make the connection as illustrated.Please be sure to reconnect the cable asshown 2 below to install this unit to theVolkswagen vehicles etc.1 When the A-7 pin (red) is connected withthe ignition, and the A-4 pin (yellow) isconnected to the constant power supplyof the vehicle’s ISO connector (default):A-7 Pin(Red)A-4 Pin(Yellow)UnitVehicleIgnition cable(Red)Battery cable(Yellow)2 When the A-7 pin (red) is connectedto the constant power supply, and theA-4 pin (yellow) is connected with theignition of the vehicle’s ISO connector:A-7 Pin(Red)A-4 Pin(Yellow)UnitVehicleIgnition cable(Red)Battery cable(Yellow)