Pioneer DEH-2120UB - Manual (Page 5)

Connecting the units English
Note
• When this unit is installed in a vehicle without
ACC (accessory) position on the ignition switch,
red cable must be wired to the terminal that can
detect the operation of the ignition key. Otherwise,
battery drain may result.
ACC position No ACC position
• Use this unit in other than the following
conditions could result in fire or malfunction.
— Vehicles with a 12-volt battery and negative
grounding.
— Speakers with 50 W (output value) and 4 ohm
to 8 ohm (impedance value).
• To prevent short-circuit, overheating or
malfunction, be sure to follow the directions
below.
— Disconnect the negative terminal of the
battery before installation.
— Secure the wiring with cable clamps or
adhesive tape. To protect the wiring, wrap
adhesive tape around them where they lie
against metal parts.
— Place all cables away from moving parts, such
as gear shift and seat rails.
— Place all cables away from hot places, such as
near the heater outlet.
— Do not pass the yellow cable through a hole
into the engine compartment to connect to a
battery.
— Cover any disconnected cable connectors with
insulating tape.
— Do not shorten any cables.
— Never cut the insulation of the power cable of
this unit in order to share the power to other
equipment. Current capacity of the cable is
limited.
— Use a fuse of the rating prescribed.
— Never wire the speaker negative cable directly
to ground.
— Never band together multiple speaker’s
negative cables.
• Control signal is output through blue/white cable
when this unit is powered on. Connect it to an
external power amp’s system remote control or
the vehicle’s auto-antenna relay control terminal
(max. 300 mA, 12 V DC). If the vehicle is equipped
with a glass antenna, connect it to the antenna
booster power supply terminal.
• Never connect blue/white cable to external power
amp’s power terminal. Also, never connect
it to the power terminal of the auto antenna.
Otherwise, battery drain or malfunction may
result.
• Black cable is ground. This cable and other
product’s ground cable (especially, high-current
products such as power amp) must be wired
separately. Otherwise, fire or malfunction may
result if they are accidentally detached.
Connection Diagram
1. Rear output
2. Antenna jack
3. Fuse (10 A)
4. Wired remote input
Hard-wired remote control adaptor can be
connected (sold separately).
5. This product
6. Note
Depending on the kind of vehicle, the function
of 3* and 5* may be different. In this case, be
sure to connect 2* to 5* and 4* to 3*.
7. Connect leads of the same color to
each other.
8. Cap (1*)
Do not remove cap if this terminal is not in use.
9. Yellow (3*)
Back-up (or accessory)
10. Yellow (2*)
Connect to the constant 12 V supply terminal.
11. Red (5*)
Accessory (or back-up)
12. Red (4*)
Connect to terminal controlled by ignition
switch (12 V DC).
13. Black (chassis ground)
Connect to a clean, paint-free metal location.
14. ISO connector
Note
In some vehicles, the ISO connector may
be divided into two. In this case, be sure to
connect to both connectors.
15. Yellow/black
If you use an equipment with Mute function,
wire this lead to the Audio Mute lead on that
equipment. If not, keep the Audio Mute lead
free of any connections.
16. Blue/white
Connect to system control terminal of the
power amp (max. 300 mA 12 V DC).
17. Blue/white (7*)
Connect to auto-antenna relay control terminal
(max. 300 mA 12 V DC).
18. Blue/white (6*)
The pin position of the ISO connector will differ
depends on the type of vehicle. Connect 6*
and 7* when Pin 5 is an antenna control type.
In another type of vehicle, never connect 6*
and 7*.
19. Speaker leads
White: Front left +
White/black: Front left *
Gray: Front right +
Gray/black: Front right *
Green: Rear left +
Green/black: Rear left *
Violet: Rear right +
Violet/black: Rear right *
20. To rear output
21. Connect with RCA cables (sold separately)
22. Power amp (sold separately)
23. System remote control
24. Left
25. Right
26. Rear speaker
27. Perform these connections when using the
optional amplifier.  
 
22. Power amp
(sold separately)
4. Wired remote input
Hard-wired remote control
adaptor can be connected
(sold separately).
24. Left 25. Right
23. System remote control
3. Fuse (10 A)
21. Connect with RCA cables
(sold separately)
27. Perform these connections when
using the optional amplifier.
2. Antenna jack
5. This product
1*
3* 2*
4* 5*
6. Note
Depending on the kind of vehicle,
the function of 3* and 5* may be
different. In this case, be sure to
connect 2* to 5* and 4* to 3*.
7. Connect leads of the
same color to each other.
8. Cap (1*)
Do not remove cap
if this terminal is
not in use.
9. Yellow (3*)
Back-up (or
accessory)
11. Red (5*)
Accessory
(or back-up)
10. Yellow (2*)
Connect to the constant
12 V supply terminal.
12. Red (4*)
Connect to terminal controlled by
ignition switch (12 V DC).
14. ISO connector
Note
In some vehicles, the ISO connector
may be divided into two. In this case,
be sure to connect to both connectors.
19. Speaker leads
White: Front left 
White/black: Front left 
Gray: Front right 
Gray/black: Front right 
Green: Rear left 
Green/black: Rear left 
Violet: Rear right 
Violet/black: Rear right 
16. Blue/white
Connect to system control terminal of the
power amp (max. 300 mA 12 V DC).
17. Blue/white (7*)
Connect to auto-antenna relay control
terminal (max. 300 mA 12 V DC).
13. Black (chassis ground)
Connect to a clean, paint-free metal location.
The pin position of the ISO connector will
differ depends on the type of vehicle.
Connect 6* and 7* when Pin 5 is an
antenna control type. In another type of
vehicle, never connect 6* and 7*.
18. Blue/white (6*)
1. Rear output
20.To Rear output
26.Rear speaker 26.Rear speaker
15. Yellow/black
If you use an equipment with Mute
function, wire this lead to the Audio
Mute lead on that equipment. If not,
keep the Audio Mute lead free of any
connections.
YRD5219AS_inst.indd 17-20 2008/07/18 16:50:50