– 60 –
S
OURCE
U
NIT
T
ROUBLESHOOTING
Source Unit does
not turn on
No backlight
illumination
No audio output
(display indicates
“VOL 0”)
Speakers pop when
turning Source Unit
On/Off
Voltage applied to Red
and Yellow wires is not
between 10.5 and 16
volts or there is no volt-
age present
Source unit is not prop-
erly grounded
Voltage applied to Or-
ange wire is not between
10.5 and 16 volts or there
is no voltage present
Source Unit is not prop-
erly grounded
Brown wire is grounded
Cellular phone or other
component is falsely trig-
gering Brown wire
Turn On “A” and “B” are
not configured properly
Bad component in the
signal chain
Check battery, fuses and con-
nections and repair or replace
as necessary. If voltage is above
+16 volts, have the electrical
system inspected by an autho-
rized car service center
Check wiring and repair as
necessary
Check battery, fuses and con-
nections and repair or replace
as necessary. If voltage is above
+16 volts, have the electrical
system inspected by an autho-
rized car service center
Check wiring and repair as
necessary
Check wiring and repair as
necessary
Disconnect Brown wire and
check operation. Repair wir-
ing as necessary
Check wiring and repair as
necessary. Refer to “Wiring the
System” section of this manual
for further information
Check connections and bypass
additional components (cross-
overs and equalizers) between
the source unit and the ampli-
fier. Connect one component
at a time to determine the cul-
prit. Connect this component
to the Blue/White wire and
check for pops. If pops persist,
repair or replace component
as necessary
Symptom
Diagnosis
Remedy
TROUBLE- S
H
O
O
T
I
N
G
