Kenwood KDC-2021S - Manual (Page 15)

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Make sure that the unit is installed securely in place. If the unit is
unstable, it may malfunction (eg, the sound may skip).
Bend the tabs of the
mounting sleeve
with a screwdriver or
similar utensil and
attach it in place.
Metal mounting
strap
(commercially
available)
Self-tapping
screw
(commercially
available)
Firewall or metal support
■ Installation
Screw (M4X8)
(commercially
available)
Installation
Connecting the ISO Connector (see p.14)
The pin arrangement for the ISO connectors depends on the type of
vehicle you drive. Make sure to make the proper connections to
prevent damage to the unit.
The default connection for the wiring harness is described in 1 below.
If the ISO connector pins are set as described in 2 or 3, make the
connection as illustrated.
2WARNING
Unit Vehicle
Ignition cable (Red)
Battery cable (Yellow)
A–7 Pin (Red)
A–4 Pin (Yellow)
Unit Vehicle
Ignition cable (Red)
Battery cable (Yellow)
A–7 Pin (Red)
A–4 Pin (Yellow)
Unit Vehicle
Ignition cable (Red)
Battery cable (Yellow)
A–7 Pin (Red)
A–4 Pin (Yellow)
When the connection is made as in 3 above, the unit's power will not
be linked to the ignition key. For that reason, always make sure to turn
off the unit's power when the ignition is turned off.
To link the unit's power to the ignition, connect the ignition cable
(ACC...red) to a power source that can be turned on and off with the
ignition key.
1 (Default setting) The A-7 pin (red) of the vehicle's ISO connector
is linked with the ignition, and the A-4 pin (yellow) is connected to
the constant power supply.
2 The A-7 pin (red) of the vehicle's ISO connector is connected to
the constant power supply, and the A-4 pin (yellow) is linked to
the ignition.
3 The A-4 pin (yellow) of the vehicle's ISO connector is not
connected to anything, while the A-7 pin (red) is connected to the
constant power supply (or both the A-7 (red) and A-4 (yellow) pins
are connected to the constant power supply).
KDC-2021S_U.S 01.10.10 2:31 PM Page 15